DC/DC Converters

Schaefer S600D SERIES DC/DC Converter

The Schaefer S600D Series is a versatile industrial-grade DC/DC converter offering an output power range of 200W to 350W. Designed to support a wide range of DC input and output voltage configurations, including high-voltage models, it is suitable for demanding environments requiring reliable and efficient performance. The S600D employs natural convection cooling, ensuring dependable operation even in challenging conditions. Flexible mounting options, including wall, chassis, or 19" rackmount via a 3U subrack, allow for easy integration into various systems. Optional features, such as redundancy, monitoring, control, and enhanced environmental protection, further enhance its adaptability and durability. Ideal for railway, mining, power utilities (generation, transmission, and distribution), and other industrial applications, the S600D Series is a trusted solution for critical power needs.

Features

  • Output Power Range: 200W to 350W
  • Wide range of DC Input / Output Voltage Configurations, including high-voltage models.
  • Natural Convection Cooling, suitable for demanding environments.
  • Flexible Mounting Options: Wall, chassis, or 19" rackmount (via 3U Subrack)
  • Optional Features: Redundancy, monitoring, control and enhanced environmental protection.
  • Applications: Railway, Mining, Power Utilities (Generation, Transmission & Distribution) and industrial systems.
Specifications
INPUT
Input voltage DC Input voltage: 10 - 800Vdc
See selection table
Units will turn off with under or over input voltage.
No-load input power 5-6W model (series dependent)
Switch on time 1-2 seconds.
OUTPUT
Output voltage Voltage range; 4.5 - 400Vdc
See selection table
Output current See selection table.
Ripple & noise 1% + 30mVpp
Line regulation 0.1% (±10%)
Load regulation 0.2% typical, load step 10-90%
Load transient 6% typical, load step 10-90%
Response time 2-3ms typical ±1%
Temperature coefficient 0.02% per °C typical.
Holdup time 10mS at 220VAC typical
Turn on rise time 100mS typical (soft start)
Remote sensing Standard for all series
Efficiency 80%-92% typical
Output Options Option dd: Decoupling Diode for redundant / parallel operation
Option cs: Active Current Sharing
Option h: Remote on/off (inhibit)
Option dr: DC OK via relay contacts
PROTECTION
Overload protection Current limited at 105%–110% of full load.
Overvoltage protection OVP switches off module with automatic return to operation
Protection Options Option i: Inrush Current Limiting
Option sd: Reverse polarity protection for DC input by Series Diode
MTBF 100Khrs to 140Khrs at 40°C acc. to MIL-HDBK-217E (notice 1)
ENVIRONMENTAL
Operating temperature -20°C to +75°C (optional -40 to 75C)
Load derating Derate 2.5% per °C, from +55°C to 75°C
Cooling H: Heatsink - natural convection
F: Fan - increased airflow recommended
TF: Temperature controlled Fan included
See selection table
Environment Options Option c: Extended temperature range to -40°C
Storage temperature -40°C to +85°C
Humidity Up to 95% RH, non-condensing
STANDARDS
EMI standards acc. to EN61000-6-4 class A, optionally class B
Immunity standards acc. to EN61000-6-2
C-Tick AS/NZS CISPR11: 2002 Group1 Class A
Safety / Construction acc. to EN60950-1 / EN50178
Protection category IP20 acc. to EN60529 NEMA or others on request
MECHANICAL
Mounting See technical illustrations
Eurocassette, pluggable module for 19" subrack
Option w: Wall Mounting
Option cha: Chassis Mounting
Option din: DIN Rail Mounting
Dimensions See Technical illustration
Connector H15 acc. to DIN 41612 H15 and high current connectors for I > 50A, or terminals / bolts / bars
Mechanical Options Option ms: Increased Mechanical Strength
Option t: Tropical protection
19" Rack Mounting Options Subrack Height 3U, 5U, 6U
Wiring, Front Panels
Accessories: Fuses, MCBs, Mains on/off switch
Contact Powerbox for rack configuration
Selection Table
INPUT 10 –16 VDC OUTPUT AMPS INPUT 18–36 VDC OUTPUT AMPS INPUT 36–75 VDC INPUT 45–90 VDC INPUT 80–160 VDC INPUT 160–320 VDC INPUT 320–380 VDC OUTPUT AMPS COOLING HEATSINK OUTPUT VOLTAGE VOLTAGE ADJUSTMENT
S600 30 S620 50 S630 S640 S650 S670 S680Z 50 H 5 4.5 – 5.5
S601 20 S621 30 S631 S641 S651 S671 S681Z 32 H 9 8 – 10
S602 15 S622 24 S632 S642 S652 S672 S682Z 26 H 12 11 – 13
S 603 12 S623 20 S633 S643 S653 S673 S683Z 22 H 15 14 – 16
S604 8 S624 12 S634 S644 S654 S674 S684Z 14 H 24 23 – 26
S605 7 S625 10 S635 S645 S655 S675 S685Z 12 H 28 26 – 30
S609 4.4 S629 6 S639 S649 S659 S679 S689Z 6.5 H 48 45 – 55
S606 3.6 S626 5 S636 S646 S656 S676 S686Z 5.2 H 6 08 – 68
S607 1.8 S627 2.5 S637 S647 S657 S677 S687Z 3.1 H 10 100 –130
S 608 0.9 S628 1.25 S638 S648 S658 S678 S688Z 1.5 H 220 200 – 250

Cooling

H: Heatsink - natural convection

F: Fan - increased airflow recommended

TF: Temperature controlled Fan included

See selection table

Model configuration options: Add the options to the model number, eg. S656-dd-dr-cs Options for Input, Output, Environmental and Mechanical follow.
19" Rack Mounting Options Subrack Height 3U, 5U, 6U Wiring, Front Panels Accessories: Fuses, MCBs, Mains on/off switch Contact Powerbox for rack configuration
OPTIONS INPUT
Option “i” (inrush current limiting): A thermistor is connected in series with the input lines which changes its resistance from high to low when it gets hot. It does not reduce the current surge if the input power is interrupted for a short period of time not allowing the thermistor to cool down. Thermistors are fitted as standard to all mains input models except for 1-phase input of models > 2.5kW. Thermistors are available up to 45A. For higher input current an electronic inrush current limitation can be offered.
Option “ie” electronic inrush current limiting An electronic circuit limits the inrush current.
Option “sd” (series diode): A series diode protects the module against input voltage of wrong polarity (additional power losses).
Option “ad” (anti-parallel diode): To avoid the power losses of a series diode a diode is provided with opposite polarity in parallel to the input blowing an internal or external fuse if the module is connected to a supply with wrong polarity.
Option “au” (auto-ranging) For standard dual AC input models the range of 115/230Vac is to be selected by connecting the input line to different pins on the connector. With auto-ranging the unit senses the input voltage and provides automatically the correct connection.
Option “p” (power fail): A signal (logic or relay) is given if the input voltage (AC or DC) drops below the specified limit. In AC input units we sense the rectified input voltage so that a power fail alarm will not be triggered if at light loads mains power returns before the input capacitors are substantially discharged.
Option “r” (relay): A relay instead of a logic signal is provided for failure indication.
output
Option “dd” (decoupling diode): For redundant operation the outputs of two or more units are paralleled behind de-coupling diodes so that an internal fault of one module does not affect the operation of the others. These diodes cause power losses.
Option “cs” (active current sharing): An additional control circuit provides active current sharing via an interconnecting wire between converters that operate in parallel. Active current sharing should be used for multi-output units operating in parallel.
Option “csi” (current sharing interrupt): Option "csi" will effect the removal of the "cs" signal. Should there be an instance where a unit is not supplying the load, then the effect of its "cs" signal is removed, and the load voltage is unaffected by this condition.
Option “h1” (inhibit): A terminal connected to the negative input line also shuts off the converter. This can also be used in conjunction with a thermal trip which shuts the unit down.
Option “h2” (inhibit): Operation of the unit is inhibited if a voltage signal (5V/10mA) is applied in reference to the negative line of the (main) output.
Option “rco” (reducing current limiting at over temperature) A circuit reduces the current limiting level at higher temperature (to be specified).
Option “d” (DC-ok, one output): A logic signal is given if the output voltage (main output in multi-output systems) is below the specified limit.
Option “m” (DC-ok, all outputs): In multi-output systems a logic signal is provided if the voltage of any output is below the specified limit.
Option “ac” (AC ok) A logic signal connected to relay contacts is given if the output voltage of an inverter is below the specified limit.
Option "y" (sys-reset): This logic signal is a combination of power fail and DC-ok as specified for VME systems.
Option "r" (relay): A relay instead of a logic signal is provided for failure indication.
environment
Option "t" (tropical protection):The unit is given additional protection by a heavy coat of varnish on the printed circuit board(s) and components.
Option "c" (extended temperature range):The circuit is designed and tested for operation at an ambient temperature as low as –40 °C.
Option "ms" (increased mechanical strength): Screws are secured by Locktite and heavy components are fastened by ties and/or glue. Modules with the "ms" option meet the standard EN61373 regarding shock and vibration.
mechanics
Standard mounting "Eurocassette" pluggable module for 19" sub-racks 8
Option "w" (wall mounting): Module is screwed against a mounting plate for installation in a cabinet. The load connections are typically a terminal block.
Option "cha" (chassis mount) Module is designed for installation to a structure or within cabinet. Screw type connectors are supplied with the module.
Option "din" (DIN rail mount) Module is designed for DIN rail mounting to a structure or within Cabinet. Screw type connectors are supplied with the module.
Technical Illustrations
Downloads
Schaefer_s600-AC-DC-PS-BatteryChargers-DC-DC-Converters.pdf
INPUT
Input voltage DC Input voltage: 10 - 800Vdc
See selection table
Units will turn off with under or over input voltage.
No-load input power 5-6W model (series dependent)
Switch on time 1-2 seconds.
OUTPUT
Output voltage Voltage range; 4.5 - 400Vdc
See selection table
Output current See selection table.
Ripple & noise 1% + 30mVpp
Line regulation 0.1% (±10%)
Load regulation 0.2% typical, load step 10-90%
Load transient 6% typical, load step 10-90%
Response time 2-3ms typical ±1%
Temperature coefficient 0.02% per °C typical.
Holdup time 10mS at 220VAC typical
Turn on rise time 100mS typical (soft start)
Remote sensing Standard for all series
Efficiency 80%-92% typical
Output Options Option dd: Decoupling Diode for redundant / parallel operation
Option cs: Active Current Sharing
Option h: Remote on/off (inhibit)
Option dr: DC OK via relay contacts
PROTECTION
Overload protection Current limited at 105%–110% of full load.
Overvoltage protection OVP switches off module with automatic return to operation
Protection Options Option i: Inrush Current Limiting
Option sd: Reverse polarity protection for DC input by Series Diode
MTBF 100Khrs to 140Khrs at 40°C acc. to MIL-HDBK-217E (notice 1)
ENVIRONMENTAL
Operating temperature -20°C to +75°C (optional -40 to 75C)
Load derating Derate 2.5% per °C, from +55°C to 75°C
Cooling H: Heatsink - natural convection
F: Fan - increased airflow recommended
TF: Temperature controlled Fan included
See selection table
Environment Options Option c: Extended temperature range to -40°C
Storage temperature -40°C to +85°C
Humidity Up to 95% RH, non-condensing
STANDARDS
EMI standards acc. to EN61000-6-4 class A, optionally class B
Immunity standards acc. to EN61000-6-2
C-Tick AS/NZS CISPR11: 2002 Group1 Class A
Safety / Construction acc. to EN60950-1 / EN50178
Protection category IP20 acc. to EN60529 NEMA or others on request
MECHANICAL
Mounting See technical illustrations
Eurocassette, pluggable module for 19" subrack
Option w: Wall Mounting
Option cha: Chassis Mounting
Option din: DIN Rail Mounting
Dimensions See Technical illustration
Connector H15 acc. to DIN 41612 H15 and high current connectors for I > 50A, or terminals / bolts / bars
Mechanical Options Option ms: Increased Mechanical Strength
Option t: Tropical protection
19" Rack Mounting Options Subrack Height 3U, 5U, 6U
Wiring, Front Panels
Accessories: Fuses, MCBs, Mains on/off switch
Contact Powerbox for rack configuration
INPUT 10 –16 VDC OUTPUT AMPS INPUT 18–36 VDC OUTPUT AMPS INPUT 36–75 VDC INPUT 45–90 VDC INPUT 80–160 VDC INPUT 160–320 VDC INPUT 320–380 VDC OUTPUT AMPS COOLING HEATSINK OUTPUT VOLTAGE VOLTAGE ADJUSTMENT
S600 30 S620 50 S630 S640 S650 S670 S680Z 50 H 5 4.5 – 5.5
S601 20 S621 30 S631 S641 S651 S671 S681Z 32 H 9 8 – 10
S602 15 S622 24 S632 S642 S652 S672 S682Z 26 H 12 11 – 13
S 603 12 S623 20 S633 S643 S653 S673 S683Z 22 H 15 14 – 16
S604 8 S624 12 S634 S644 S654 S674 S684Z 14 H 24 23 – 26
S605 7 S625 10 S635 S645 S655 S675 S685Z 12 H 28 26 – 30
S609 4.4 S629 6 S639 S649 S659 S679 S689Z 6.5 H 48 45 – 55
S606 3.6 S626 5 S636 S646 S656 S676 S686Z 5.2 H 6 08 – 68
S607 1.8 S627 2.5 S637 S647 S657 S677 S687Z 3.1 H 10 100 –130
S 608 0.9 S628 1.25 S638 S648 S658 S678 S688Z 1.5 H 220 200 – 250

Cooling

H: Heatsink - natural convection

F: Fan - increased airflow recommended

TF: Temperature controlled Fan included

See selection table

Model configuration options: Add the options to the model number, eg. S656-dd-dr-cs Options for Input, Output, Environmental and Mechanical follow.
19" Rack Mounting Options Subrack Height 3U, 5U, 6U Wiring, Front Panels Accessories: Fuses, MCBs, Mains on/off switch Contact Powerbox for rack configuration
OPTIONS INPUT
Option “i” (inrush current limiting): A thermistor is connected in series with the input lines which changes its resistance from high to low when it gets hot. It does not reduce the current surge if the input power is interrupted for a short period of time not allowing the thermistor to cool down. Thermistors are fitted as standard to all mains input models except for 1-phase input of models > 2.5kW. Thermistors are available up to 45A. For higher input current an electronic inrush current limitation can be offered.
Option “ie” electronic inrush current limiting An electronic circuit limits the inrush current.
Option “sd” (series diode): A series diode protects the module against input voltage of wrong polarity (additional power losses).
Option “ad” (anti-parallel diode): To avoid the power losses of a series diode a diode is provided with opposite polarity in parallel to the input blowing an internal or external fuse if the module is connected to a supply with wrong polarity.
Option “au” (auto-ranging) For standard dual AC input models the range of 115/230Vac is to be selected by connecting the input line to different pins on the connector. With auto-ranging the unit senses the input voltage and provides automatically the correct connection.
Option “p” (power fail): A signal (logic or relay) is given if the input voltage (AC or DC) drops below the specified limit. In AC input units we sense the rectified input voltage so that a power fail alarm will not be triggered if at light loads mains power returns before the input capacitors are substantially discharged.
Option “r” (relay): A relay instead of a logic signal is provided for failure indication.
output
Option “dd” (decoupling diode): For redundant operation the outputs of two or more units are paralleled behind de-coupling diodes so that an internal fault of one module does not affect the operation of the others. These diodes cause power losses.
Option “cs” (active current sharing): An additional control circuit provides active current sharing via an interconnecting wire between converters that operate in parallel. Active current sharing should be used for multi-output units operating in parallel.
Option “csi” (current sharing interrupt): Option "csi" will effect the removal of the "cs" signal. Should there be an instance where a unit is not supplying the load, then the effect of its "cs" signal is removed, and the load voltage is unaffected by this condition.
Option “h1” (inhibit): A terminal connected to the negative input line also shuts off the converter. This can also be used in conjunction with a thermal trip which shuts the unit down.
Option “h2” (inhibit): Operation of the unit is inhibited if a voltage signal (5V/10mA) is applied in reference to the negative line of the (main) output.
Option “rco” (reducing current limiting at over temperature) A circuit reduces the current limiting level at higher temperature (to be specified).
Option “d” (DC-ok, one output): A logic signal is given if the output voltage (main output in multi-output systems) is below the specified limit.
Option “m” (DC-ok, all outputs): In multi-output systems a logic signal is provided if the voltage of any output is below the specified limit.
Option “ac” (AC ok) A logic signal connected to relay contacts is given if the output voltage of an inverter is below the specified limit.
Option "y" (sys-reset): This logic signal is a combination of power fail and DC-ok as specified for VME systems.
Option "r" (relay): A relay instead of a logic signal is provided for failure indication.
environment
Option "t" (tropical protection):The unit is given additional protection by a heavy coat of varnish on the printed circuit board(s) and components.
Option "c" (extended temperature range):The circuit is designed and tested for operation at an ambient temperature as low as –40 °C.
Option "ms" (increased mechanical strength): Screws are secured by Locktite and heavy components are fastened by ties and/or glue. Modules with the "ms" option meet the standard EN61373 regarding shock and vibration.
mechanics
Standard mounting "Eurocassette" pluggable module for 19" sub-racks 8
Option "w" (wall mounting): Module is screwed against a mounting plate for installation in a cabinet. The load connections are typically a terminal block.
Option "cha" (chassis mount) Module is designed for installation to a structure or within cabinet. Screw type connectors are supplied with the module.
Option "din" (DIN rail mount) Module is designed for DIN rail mounting to a structure or within Cabinet. Screw type connectors are supplied with the module.
Schaefer_s600-AC-DC-PS-BatteryChargers-DC-DC-Converters.pdf

Find the Right Model

Model Number Input Voltage (Vdc) Output Voltage (Vdc) Output Current (A)
product variant S600 10...16Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 30A
product variant S601 10...16Vdc 9Vdc (Adj. 8 - 10Vdc) 20A
product variant S602 10...16Vdc 12Vdc (Adj. 11 - 13Vdc) 15A
product variant S603 10...16Vdc 15Vdc (Adj. 14 - 16Vdc) 12A
product variant S604 10...16Vdc 24Vdc (Adj. 23 - 26Vdc) 8A
product variant S605 10...16Vdc 28Vdc (Adj. 26 - 30Vdc) 7A
product variant S609 10...16Vdc 48Vdc (Adj. 45 - 55Vdc) 4.4A
product variant S606 10...16Vdc 60Vdc (Adj. 58 - 68Vdc) 3.6A
product variant S607 10...16Vdc 110Vdc (Adj. 100 - 130Vdc) 1.8A
product variant S608 10...16Vdc 220Vdc (Adj. 200 - 250Vdc) 0.9A
product variant S620 18...36Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 50A
product variant S621 18...36Vdc 9Vdc (Adj. 8 - 10Vdc) 30A
product variant S622 18...36Vdc 12Vdc (Adj. 11 - 13Vdc) 24A
product variant S623 18...36Vdc 15Vdc (Adj. 14 - 16Vdc) 20A
product variant S624 18...36Vdc 24Vdc (Adj. 23 - 26Vdc) 12A
product variant S625 18...36Vdc 28Vdc (Adj. 26 - 30Vdc) 10A
product variant S629 18...36Vdc 48Vdc (Adj. 45 - 55Vdc) 6A
product variant S626 18...36Vdc 60Vdc (Adj. 58 - 68Vdc) 5A
product variant S627 18...36Vdc 110Vdc (Adj. 100 - 130Vdc) 2.5A
product variant S628 18...36Vdc 220Vdc (Adj. 200 - 250Vdc) 1.25A
product variant S630 36...75Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 50A
product variant S631 36...75Vdc 9Vdc (Adj. 8 - 10Vdc) 32A
product variant S632 36...75Vdc 12Vdc (Adj. 11 - 13Vdc) 26A
product variant S633 36...75Vdc 15Vdc (Adj. 14 - 16Vdc) 22A
product variant S634 36...75Vdc 24Vdc (Adj. 23 - 26Vdc) 14A
product variant S635 36...75Vdc 28Vdc (Adj. 26 - 30Vdc) 12A
product variant S639 36...75Vdc 48Vdc (Adj. 45 - 55Vdc) 6.5A
product variant S636 36...75Vdc 60Vdc (Adj. 58 - 68Vdc) 5.2A
product variant S637 36...75Vdc 110Vdc (Adj. 100 - 130Vdc) 3A
product variant S638 36...75Vdc 220Vdc (Adj. 200 - 250Vdc) 1.5A
product variant S640 45...90Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 50A
product variant S641 45...90Vdc 9Vdc (Adj. 8 - 10Vdc) 32A
product variant S642 45...90Vdc 12Vdc (Adj. 11 - 13Vdc) 26A
product variant S643 45...90Vdc 15Vdc (Adj. 14 - 16Vdc) 22A
product variant S644 45...90Vdc 24Vdc (Adj. 23 - 26Vdc) 14A
product variant S645 45...90Vdc 28Vdc (Adj. 26 - 30Vdc) 12A
product variant S649 45...90Vdc 48Vdc (Adj. 45 - 55Vdc) 6.5A
product variant S646 45...90Vdc 60Vdc (Adj. 58 - 68Vdc) 5.2A
product variant S647 45...90Vdc 110Vdc (Adj. 100 - 130Vdc) 3A
product variant S 648 45...90Vdc 220Vdc (Adj. 200 - 250Vdc) 1.5A
product variant S650 80...160Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 50A
product variant S651 80...160Vdc 9Vdc (Adj. 8 - 10Vdc) 32A
product variant S652 80...160Vdc 12Vdc (Adj. 11 - 13Vdc) 26A
product variant S653 80...160Vdc 15Vdc (Adj. 14 - 16Vdc) 22A
product variant S654 80...160Vdc 24Vdc (Adj. 23 - 26Vdc) 14A
product variant S655 80...160Vdc 28Vdc (Adj. 26 - 30Vdc) 12A
product variant S659 80...160Vdc 48Vdc (Adj. 45 - 55Vdc) 6.5A
product variant S656 80...160Vdc 60Vdc (Adj. 58 - 68Vdc) 5.2A
product variant S657 80...160Vdc 110Vdc (Adj. 100 - 130Vdc) 3A
product variant S658 80...160Vdc 220Vdc (Adj. 200 - 250Vdc) 1.5A
product variant S670 160...320Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 50A
product variant S671 160...320Vdc 9Vdc (Adj. 8 - 10Vdc) 32A
product variant S672 160...320Vdc 12Vdc (Adj. 11 - 13Vdc) 26A
product variant S673 160...320Vdc 15Vdc (Adj. 14 - 16Vdc) 22A
product variant S674 160...320Vdc 24Vdc (Adj. 23 - 26Vdc) 14A
product variant S675 160...320Vdc 28Vdc (Adj. 26 - 30Vdc) 12A
product variant S679 160...320Vdc 48Vdc (Adj. 45 - 55Vdc) 6.5A
product variant S676 160...320Vdc 60Vdc (Adj. 58 - 68Vdc) 5.2A
product variant S677 160...320Vdc 110Vdc (Adj. 100 - 130Vdc) 3A
product variant S678 160...320Vdc 220Vdc (Adj. 200 - 250Vdc) 1.5A
product variant S680Z 320...380Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 50A
product variant S681Z 320...380Vdc 9Vdc (Adj. 8 - 10Vdc) 32A
product variant S682Z 320...380Vdc 12Vdc (Adj. 11 - 13Vdc) 26A
product variant S683Z 320...380Vdc 15Vdc (Adj. 14 - 16Vdc) 22A
product variant S684Z 320...380Vdc 24Vdc (Adj. 23 - 26Vdc) 14A
product variant S685Z 320...380Vdc 28Vdc (Adj. 26 - 30Vdc) 12A
product variant S689Z 320...380Vdc 48Vdc (Adj. 45 - 55Vdc) 6.5A
product variant S686Z 320...380Vdc 60Vdc (Adj. 58 - 68Vdc) 5.2A
product variant S687Z 320...380Vdc 110Vdc (Adj. 100 - 130Vdc) 3A
product variant S688Z 320...380Vdc 220Vdc (Adj. 200 - 250Vdc) 1.5A

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