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D1U3CS-D-850-12-HxxC Series
www.murata-ps.com
81mm 1U Front End DC-DC Power Supply Converter
PRODUCT OVERVIEW
The D1U3CS-D-850-12-HxxC series are highly efficient 850 watt, DC input front end supplies with a 12V
main output and a 3.3V (20W) standby. They have active current sharing and up to 8 supplies may be
operated in parallel. The supplies may be hot plugged, they recover from overtemperature faults, and have
logic and PMBus status signals. Their low profile 1U package and >15W/cubic inch power density make
them ideal for delivering reliable, efficient power for telecom and other 12V distributed power systems that
include servers, workstations and storage systems.
ORDERING GUIDE
FEATURES
Part Number

850W output power

87% efficient at half power
Power Output
Main
Output
Standby Output1
Airflow
850W
12V
3.3V
Back to front
Front to back
D1U3CS-D-850-12-HC4C
D1U3CS-D-850-12-HC3C

12V main output

3.3V or 5V standby output of 20W
INPUT CHARACTERISTICS

1U height: 3.20" x 11.00" x 1.57"
Parameter
Conditions
Input Voltage Operating Range
Turn-on Input Voltage
Turn-off Input Voltage
Maximum Current at Vin = -40Vdc

15.4 Watts per cubic inch density

N+1 redundancy capable,
including hot plugging (up to 8 in parallel)

Active current sharing on 12V main output;
ORing FET

Overvoltage, overcurrent,
overtemperature protection

Internal cooling fan (variable speed)
DC Line Inrush Peak Current
Efficiency (-40Vdc - 72Vdc)
Ramp up
Ramp down
850W
Cold start between 0 to 200msec
Cold start between 0 to 200msec
20% load
50% load
100% load
Min.
Nom.
Max.
-40
-40
-38.5
-48
-43.5
-39
-72
-44
-39.5
25
50Apk
100Apk
40V
72V
85
87
87
Units
Vdc
Adc
%
OUTPUT VOLTAGE CHARACTERISTICS

PMBus™ / I²C interface with status indicators
Output
Voltage

RoHS compliant
12V
3.3VSB
1
2
Parameter
Voltage Set Point Accuracy
Line and Load Regulation
Ripple Voltage & Noise2
Output Current
Load Capacitance
Voltage Set Point Accuracy
Line and Load Regulation
Ripple Voltage & Noise2
Output Current
Load Capacitance
Conditions
Min.
Typ.
Max.
12.0
11.4
20MHz Bandwidth
0
20MHz Bandwidth
0
Vdc
12.6
120
69.1
30000
mV p-p
A
μF
3.4
50
6
10000
mV p-p
A
μF
3.3
3.2
Units
Vdc
For 5vSB, contact Murata Sales for availablity.
Ripple and noise are measured with 0.1 μF of ceramic capacitance and 10 μF of tantalum capacitance on each of the power supply
outputs. A short coaxial cable with 50Ω scope termination is used.
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Available now at
www.murata-ps.com/en/3d/acdc.html
CB
Test Certificate
and Test Report
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
D1U3CS-D-850-12-HxxC.B01 Page 1 of 5
D1U3CS-D-850-12-HxxC Series
81mm 1U Front End DC-DC Power Supply Converter
OUTPUT CHARACTERISTICS
Parameter
Conditions
Max.
Units
Output Rise Monotonicity
No voltage excursion
12V, 50-100% load step, 1A/μs di/dt
5VSB, 50-100% load step, 1A/μs di/dt
3.3VSB, 50-100% load step, 1A/μs di/dt
300
250
165
mV
Current sharing accuracy (up to 8 in parallel)
At 100% load
±7
%
Hot Swap Transients
Holdup Time
All outputs remain in regulation
At full load
5
1
%
ms
Conditions
Min.
Transient Response
Min.
Typ.
ENVIRONMENTAL CHARACTERISTICS
Parameter
Storage Temperature Range
Operating Temperature Range
Operating Humidity
Storage Humidity
Altitude (without derating at 40°C)
Altitude (without derating at 55°C)
Shock
Sinusoidal Vibration
MTBF
Acoustic
Typ.
-40
-10
5
5
4000
1800
Noncondensing
30G non operating
0.5G, 5 – 500 Hz
Per Telcordia SR-322 M1C1 @40°C
Max.
70
50
90
95
Units
°C
%
m
250K
55
hrs
dB LpAm
CSA/UL 60950-1-07-2nd Ed.
IEC 60950-1:2005 (2nd Edition)
EN 60950-1:2006 +A11
CE Marking per LVD DIRECTIVE 2006/95/EC
Power Supply has internal 40A/170VDC slow blow fuse on 48V input
90KHz for main output Converter
130KHz for standby output Converter
2.85lbs (1.29kg)
Safety Approvals
Input Fuse
Switching Frequency
Weight
PROTECTION CHARACTERISTICS
Output
Voltage
12V
3.3VSB
5VSB
Parameter
Conditions
Min.
Typ.
Max.
Units
Overtemperature (intake)
Overvoltage
Overcurrent
Overvoltage
Overcurrent
Overvoltage
Overcurrent
Autorestart
Latching
Latching
Latching
Autorecovery
Latching
Autorecovery
57
13.3
75.9
3.9
6.5
5.6
4.4
60
63
14.5
103.6
4.3
9.0
6.0
6.0
°C
V
A
V
A
V
A
Min.
Typ.
Max.
Units
ISOLATION CHARACTERISTICS
Parameter
Conditions
Input to Output - Basic
Input to Chassis - Basic
Output to Chassis
Insulation Safety Rating / Test Voltage
Isolation
1500
1500
500
Vrms
Vrms
Vdc
EMISSIONS AND IMMUNITY
Characteristic
Conducted Emissions
ESD Immunity
Radiated Field Immunity
Electrical Fast Transients/Burst Immunity
Surge Immunity
RF Conducted Immunity
Magnetic Field Immunity
Standard
FCC 47 CFR Part 15/CISPR 22/EN55022
IEC/EN 61000-4-2
IEC/EN 61000-4-3
IEC/EN 61000-4-4
IEC/EN 61000-4-5
IEC/EN 61000-4-6
IEC/EN 61000-4-8
Compliance
Class A, 6dB margin
Level 3 criteria A
Level 3 criteria B
Level 3 criteria A
Level 3 criteria A
Level 3 criteria A
3 A/m criteria B
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D1U3CS-D-850-12-HxxC.B01 Page 2 of 5
D1U3CS-D-850-12-HxxC Series
81mm 1U Front End DC-DC Power Supply Converter
OUTPUT CONNECTOR AND SIGNAL SPECIFICATION
DC and Signal Connector: FCI 51721-10002406AA
D1
D2
D3
D4
D5
D6
C1
C2
C3
C4
C5
C6
B1
B2
B3
B4
B5
B6
A1
A2
A3
A4
A5
A6
PB1
Pin Assignment
Signal Name
PB1, PB2, PB3
PB4, PB5, PB6
A1
A2
A3
A4
A5, B5, C5, D5
A6, B6, C6, DS
B1
B2
B3
+12V GND
+12V OUT
PS_ON
+12VRS_RETURN
TEMP_OK
PS_SEATED
+VSB
+VSB GND
DC OK
+12VRS
+12V_ISHARE
B4
PS_INHIBIT/PS_KILL
C1
C2
C3
C4
D1
D2
D3
D4
SDA
SCL
PWR_GD
FAN_FAIL
A0
A1
S_INT
NO CONNECTION
PB2
PB3
PB4
PB5
PB6
Description
Amps per pin
Main output voltage, return
Main output voltage
Power supply “ON”
Main output remote sense, return
Temperature “OK” signal output
Power supply is plugged into the system
Standby output voltage
Standby output voltage, return
Input DC voltage “OK” signal output
Main output remote sense
Main output active load sharing bus
30
30
N/A
N/A
N/A
N/A
2.0
2.0
N/A
N/A
N/A
Floating pin will turn off the power supply (shorter pin, lastmake and first-break contact for hot plugging) . This signal
overrides PS_ON in disabling the main output.
N/A
I2C Data line
I2C Clock line
Power good
Fan failure
Address line least significant bit
Address line most significant bit
System interrupt
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
MATING CONNECTORS
Press Fit
Mating Connector
FCI
Straight
TBD
Right Angle
51761-10002406AA
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D1U3CS-D-850-12-HxxC.B01 Page 3 of 5
D1U3CS-D-850-12-HxxC Series
81mm 1U Front End DC-DC Power Supply Converter
WIRING DIAGRAM FOR OUTPUT
Dotted lines show optional remote sense connections.
Optional remote sense lines can be attached to a load that is a distance
away from the power supply to improve regulation at the load.
+12VRS (Main Output Remote Sense)
B2
PB4-6
+12VRS (Main Output Remote Sense)
+12V OUT
+12V OUT
PB4-6
B2
12V load
D1U3CS
PB1-3
A2
B3
A5,B5,C5,D5
A1
A6,B6,C6,D6
B4
D1U3CS
+12V GND
+12V GND
+12VRS_RETURN
+12V_ISHARE
A2
+12V_ISHARE
B3
PS_ON_L
PS_ON_L
+VSB GND
+12VRS_RETURN
+VSB
+VSB
PB1-3
A5,B5,C5,D5
A1
+VSB load
FET, BJT, wire
or switch (debounced )
to turn on +12V main output
+VSB GND A6,B6,C6,D6
PS_INHIBIT/PS_KILL
PS_INHIBIT/PS_KILL
B4
CURRENT SHARING NOTES
12V Output: Current sharing is achieved using the active current share method. (See wiring diagram for connection details.)
Current sharing can be achieved with or without remote sense connected to the common load.
+VSB outputs can be tied together for redundancy but total combined output power must not exceed 20W. The +VSB output has internal ORing MOSFET for additional redundancy / internal short protection.
The current share pin B3 is a connection between the two units. It is input and/or output as the voltage on the line controls the current share. A power supply will
respond to a change in this voltage but a power supply can also change the voltage depending on the load drawn from it. On a single unit this would read 8V at
100% load. For two units sharing load then this should read 4V for perfect current sharing.
Up to 8 units can be paralleled together. Please consult your Murata sales representative if operation with more than 8 units in parallel is needed.
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D1U3CS-D-850-12-HxxC.B01 Page 4 of 5
D1U3CS-D-850-12-HxxC Series
81mm 1U Front End DC-DC Power Supply Converter
MECHANICAL DIMENSIONS
22.80 ±0.60
0.898 ±0.024
275.50 ±0.30
10.846 ±0.012
[1]
7.00
0.275
279.40 ±0.50
11.000 ±0.020
83.80 ±0.30
3.299 ±0.012
7.05 ±0.25
0.277 ±0.010
[1]
39.90 ±0.50
1.571 ±0.020
16.20 ±0.60
0.638 ±0.024
81.30 ±0.50
3.201 ±0.020
31.00
1.220
Airflow Back to Front
15.51 ±0.25
0.610 ±0.010
[1]
Airflow Front to Back
NOTE
[1] CRITICAL TO FUNCTION.
Dimensions: 3.20" x 11.00" x 1.571" [81.3mm x 279.4mm x 39.9mm]
OPTIONAL ACCESSORIES
Description
Part Number
12V D1U3CS Output Connector Card
D1U3CS-12-CONC
APPLICATION NOTES
Document Number
Description
Link
ACAN-41
D1U3CS Output Connector Card
www.murata-ps.com/data/apnotes/acan-41.pdf
ACAN-43
D1U3CS-x Communication Protocol
www.murata-ps.com/data/apnotes/acan-43.pdf
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2015 Murata Power Solutions, Inc.
www.murata-ps.com/support
D1U3CS-D-850-12-HxxC.B01 Page 5 of 5
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