DC/DC Converters

Schaefer C3800D Series Industrial DC/DC Converter

Name: Schaefer C3800D Series Industrial DC/DC Converter
Brand: Powerbox
SKU: C3822
Availability: InStock

The Schaefer C3800D Series is an industrial DC/DC converter range rated up to 2.5 kW, covering DC inputs from 18Vdc to 800Vdc and nominal outputs from 12Vdc to 400Vdc. With 80 models across eight input ranges, the series handles both step-up and step-down conversion, so one platform can serve a 24V vehicle supply, a 110V substation battery or an...

Input ranges are 18 to 32Vdc, 36 to 75Vdc, 45 to 90Vdc, 80 to 160Vdc, 160 to 320Vdc, 320 to 380Vdc, 320 to 640Vdc and 450 to 800Vdc. Each is offered with nominal outputs of 12, 15, 24, 28, 48, 60, 110, 200, 220 and 400Vdc, adjustable around the set point. Output current ranges from 160A on 12Vdc models to 5A on 400Vdc models. Models with an 18 to 32Vdc input are rated at lower output power than the higher input versions, so check the selection table for exact ratings.

Most models are cooled by natural convection, with no internal fan, which suits sealed cabinets and remote sites. The 12Vdc and 15Vdc output versions require active cooling. Units can be wall mounted or fitted into a 19 inch rack using a separate 6U subrack, and can run stand-alone or in parallel for higher power or redundant systems.

Options include monitoring and control, increased mechanical strength and enhanced environmental protection. The Schaefer C3800D carries ARTC Type Approval NESA-S061 and is used in railway, power utility generation, transmission and distribution, renewable energy and mining applications.

Powerbox Australia provides local engineering support to help you choose the right Schaefer C3800D input range, output voltage and options. For other power levels, compare the wider Schaefer range or browse all DC/DC converters.

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Schaefer C3800D Series DC/DC converter with convection cooling fins and front handles

Features

Power Rating: 2 kW to 2.5 kW.
DC Input/Output: Input range 18Vdc to 800Vdc; output range 12Vdc to 400Vdc.
Cooling: Natural convection, with active cooling for 12Vdc and 15Vdc output versions.
Mounting: Wall mount or 19" rackmount via a 6U subrack.
Optional Features: Monitoring, control, mechanical strength, and enhanced environmental protection.
Applications: Railway (ARTC Type Approval NESA-S061), Power Utilities, Renewable Energy, and Mining industries.

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

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
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 18 –32V	OUTPUT AMPS	INPUT 36-75V	INPUT 45-90V	INPUT 80-160V	INPUT 160 – 320V	INPUT 320 – 380V	INPUT 320 – 640V	INPUT 450 – 800V	COOLING	OUTPUT AMPS	OUTPUT VDC	OUTPUT RANGE
C3822	120	C3832	C3842	C3852	C3872	C3882Z	C3872G	C3872K	F	160	12	11 – 13
C3823	100	C3833	C3843	C3853	C3873	C3883Z	C3873G	C3873K	F	130	15	14 – 16
C3824	75	C3834	C3844	C3854	C3874	C3884Z	C3874G	C3874K	H	100	24	23 – 26
C3825	65	C3835	C3845	C3855	C3875	C3885Z	C3875G	C3875K	H	85	28	26 – 30
C3829	38	C3839	C3849	C3859	C3879	C3889Z	C3879 G	C3879K	H	45	48	45 – 55
C3826	30	C3836	C3846	C3856	C3876	C3886Z	C3876 G	C3876K	H	36	60	58 – 68
C3827	15	C3837	C3847	C3857	C3877	C3887Z	C3877G	C3877K	H	20	110	100 – 130
C3827J	10	C3837J	C3847J	C3857J	C3877J	C3887ZJ	C3877GJ	C3877KJ	H	12	200	190 – 200
C3828	8	C3838	C3848	C3858	C3878	C3888Z	C3878G	C3878K	H	10	220	200 – 250
C3828J	5	C3838J	C3848J	C3858J	C3878J	C3888ZJ	C3878GJ	C3878KJ	H	6	400	380 – 400

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. C3877-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 Drawings

Engineering diagram of a Eurocassette and a wall-mountable version, showing dimensions.

Downloads

Schaefer_cb3800-AC-DC-PS-BatteryChargers-DC-DC-Converters.pdf

Warranty & Returns

Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.

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