DC/DC Converters

Schaefer C600D SERIES DC/DC Converter

The Schaefer C600D Series is a highly versatile industrial DC/DC converter designed to deliver reliable performance in demanding applications. Employing natural convection cooling, it ensures dependable operation even in challenging environments. Supporting DC input voltages from 10Vdc to 380Vdc and output voltages ranging from 5Vdc to 400Vdc, the series offers both step-up and step-down configurations for maximum flexibility. Flexible mounting options, including wall, chassis, or 19" rackmount via a 3U subrack, simplify integration. 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 sectors, the C600D Series is a trusted solution for critical power conversion needs.

Features

  • Output Power Range: 300W to 500W
  • 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 10-16V OUTPUT AMPS INPUT 18-36V OUTPUT AMPS INPUT 36-75V INPUT 45-90V INPUT 80-160V INPUT 160-320V INPUT 320-380V OUTPUT AMPS COOLING OUTPUT VDC OUTPUT RANGE
C600 50 C620 70 C630 C640 C650 C670 C680Z 80 H 5 4.5-5.5
C601 30 C621 45 C631 C641 C651 C671 C681Z 50 H 9 8-10
C602 25 C622 35 C632 C642 C652 C672 C682Z 40 H 12 11-13
C603 20 C623 28 C633 C643 C653 C673 C683Z 32 H 15 14-16
C604 12 C624 18 C634 C644 C654 C674 C684Z 20 H 24 23-26
C605 10 C625 15 C635 C645 C655 C675 C685Z 17 H 28 26-30
C609 6 C629 8 C639 C649 C659 C679 C689Z 9 H 48 45-55
C606 5 C626 7 C636 C646 C656 C676 C686Z 7.5 H 60 58-68
C607 2.5 C627 3.5 C637 C647 C657 C677 C687Z 4 H 110 100-130
C608 1.2 C628 1.8 C638 C648 C658 C678 C688Z 2 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. C658-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_cb600-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 10-16V OUTPUT AMPS INPUT 18-36V OUTPUT AMPS INPUT 36-75V INPUT 45-90V INPUT 80-160V INPUT 160-320V INPUT 320-380V OUTPUT AMPS COOLING OUTPUT VDC OUTPUT RANGE
C600 50 C620 70 C630 C640 C650 C670 C680Z 80 H 5 4.5-5.5
C601 30 C621 45 C631 C641 C651 C671 C681Z 50 H 9 8-10
C602 25 C622 35 C632 C642 C652 C672 C682Z 40 H 12 11-13
C603 20 C623 28 C633 C643 C653 C673 C683Z 32 H 15 14-16
C604 12 C624 18 C634 C644 C654 C674 C684Z 20 H 24 23-26
C605 10 C625 15 C635 C645 C655 C675 C685Z 17 H 28 26-30
C609 6 C629 8 C639 C649 C659 C679 C689Z 9 H 48 45-55
C606 5 C626 7 C636 C646 C656 C676 C686Z 7.5 H 60 58-68
C607 2.5 C627 3.5 C637 C647 C657 C677 C687Z 4 H 110 100-130
C608 1.2 C628 1.8 C638 C648 C658 C678 C688Z 2 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. C658-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_cb600-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 C600 10...16Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 50A
product variant C601 10...16Vdc 9Vdc (Adj. 8 - 10Vdc) 30A
product variant C602 10...16Vdc 12Vdc (Adj. 11 - 13Vdc) 25A
product variant C603 10...16Vdc 15Vdc (Adj. 14 - 16Vdc) 20A
product variant C604 10...16Vdc 24Vdc (Adj. 23 - 26Vdc) 12A
product variant C605 10...16Vdc 28Vdc (Adj. 26 - 30Vdc) 10A
product variant C609 10...16Vdc 48Vdc (Adj. 45 - 55Vdc) 6A
product variant C606 10...16Vdc 60Vdc (Adj. 58 - 68Vdc) 5A
product variant C607 10...16Vdc 110Vdc (Adj. 100 - 130Vdc) 2.5A
product variant C608 10...16Vdc 220Vdc (Adj. 200 - 250Vdc) 1.2A
product variant C620 18...36Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 70A
product variant C621 18...36Vdc 9Vdc (Adj. 8 - 10Vdc) 45A
product variant C622 18...36Vdc 12Vdc (Adj. 11 - 13Vdc) 35A
product variant C623 18...36Vdc 15Vdc (Adj. 14 - 16Vdc) 28A
product variant C624 18...36Vdc 24Vdc (Adj. 23 - 26Vdc) 18A
product variant C625 18...36Vdc 28Vdc (Adj. 26 - 30Vdc) 15A
product variant C629 18...36Vdc 48Vdc (Adj. 45 - 55Vdc) 8A
product variant C626 18...36Vdc 60Vdc (Adj. 58 - 68Vdc) 7A
product variant C627 18...36Vdc 110Vdc (Adj. 100 - 130Vdc) 3.5A
product variant C628 18...36Vdc 220Vdc (Adj. 200 - 250Vdc) 1.8A
product variant C630 36...75Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 80A
product variant C631 36...75Vdc 9Vdc (Adj. 8 - 10Vdc) 50A
product variant C632 36...75Vdc 12Vdc (Adj. 11 - 13Vdc) 40A
product variant C633 36...75Vdc 15Vdc (Adj. 14 - 16Vdc) 32A
product variant C634 36...75Vdc 24Vdc (Adj. 23 - 26Vdc) 20A
product variant C635 36...75Vdc 28Vdc (Adj. 26 - 30Vdc) 17A
product variant C639 36...75Vdc 48Vdc (Adj. 45 - 55Vdc) 9A
product variant C636 36...75Vdc 60Vdc (Adj. 58 - 68Vdc) 7.5A
product variant C637 36...75Vdc 110Vdc (Adj. 100 - 130Vdc) 4A
product variant C638 36...75Vdc 220Vdc (Adj. 200 - 250Vdc) 2A
product variant C640 45...90Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 80A
product variant C641 45...90Vdc 9Vdc (Adj. 8 - 10Vdc) 50A
product variant C642 45...90Vdc 12Vdc (Adj. 11 - 13Vdc) 40A
product variant C643 45...90Vdc 15Vdc (Adj. 14 - 16Vdc) 32A
product variant C644 45...90Vdc 24Vdc (Adj. 23 - 26Vdc) 20A
product variant C645 45...90Vdc 28Vdc (Adj. 26 - 30Vdc) 17A
product variant C649 45...90Vdc 48Vdc (Adj. 45 - 55Vdc) 9A
product variant C646 45...90Vdc 60Vdc (Adj. 58 - 68Vdc) 7.5A
product variant C647 45...90Vdc 110Vdc (Adj. 100 - 130Vdc) 4A
product variant C648 45...90Vdc 220Vdc (Adj. 200 - 250Vdc) 2A
product variant C650 80...160Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 80A
product variant C651 80...160Vdc 9Vdc (Adj. 8 - 10Vdc) 50A
product variant C652 80...160Vdc 12Vdc (Adj. 11 - 13Vdc) 40A
product variant C653 80...160Vdc 15Vdc (Adj. 14 - 16Vdc) 32A
product variant C654 80...160Vdc 24Vdc (Adj. 23 - 26Vdc) 20A
product variant C655 80...160Vdc 28Vdc (Adj. 26 - 30Vdc) 17A
product variant C659 80...160Vdc 48Vdc (Adj. 45 - 55Vdc) 9A
product variant C656 80...160Vdc 60Vdc (Adj. 58 - 68Vdc) 7.5A
product variant C657 80...160Vdc 110Vdc (Adj. 100 - 130Vdc) 4A
product variant C658 80...160Vdc 220Vdc (Adj. 200 - 250Vdc) 2A
product variant C670 160...320Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 80A
product variant C671 160...320Vdc 9Vdc (Adj. 8 - 10Vdc) 50A
product variant C672 160...320Vdc 12Vdc (Adj. 11 - 13Vdc) 40A
product variant C673 160...320Vdc 15Vdc (Adj. 14 - 16Vdc) 32A
product variant C674 160...320Vdc 24Vdc (Adj. 23 - 26Vdc) 20A
product variant C675 160...320Vdc 28Vdc (Adj. 26 - 30Vdc) 17A
product variant C679 160...320Vdc 48Vdc (Adj. 45 - 55Vdc) 9A
product variant C676 160...320Vdc 60Vdc (Adj. 58 - 68Vdc) 7.5A
product variant C677 160...320Vdc 110Vdc (Adj. 100 - 130Vdc) 4A
product variant C678 160...320Vdc 220Vdc (Adj. 200 - 250Vdc) 2A
product variant C680Z 320...380Vdc 5Vdc (Adj. 4.5 - 5.5Vdc) 80A
product variant C681Z 320...380Vdc 9Vdc (Adj. 8 - 10Vdc) 50A
product variant C682Z 320...380Vdc 12Vdc (Adj. 11 - 13Vdc) 40A
product variant C683Z 320...380Vdc 15Vdc (Adj. 14 - 16Vdc) 32A
product variant C684Z 320...380Vdc 24Vdc (Adj. 23 - 26Vdc) 20A
product variant C685Z 320...380Vdc 28Vdc (Adj. 26 - 30Vdc) 17A
product variant C689Z 320...380Vdc 48Vdc (Adj. 45 - 55Vdc) 9A
product variant C686Z 320...380Vdc 60Vdc (Adj. 58 - 68Vdc) 7.5A
product variant C687Z 320...380Vdc 110Vdc (Adj. 100 - 130Vdc) 4A
product variant C688Z 320...380Vdc 220Vdc (Adj. 200 - 250Vdc) 2A

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