PQC250 Series
250W 3" x 5" Convection Cooled AC-
DC Power Supply
www.murata-ps.com/support
PQC250.A13 Page 1 of 8
DESCRIPTION
The PQC250 series switching power supplies utilize advanced component and circuit technologies to
deliver high efficiency and low power dissipation in both operational and standby operation in a compact
3.0" x 5.0" x 1.40" package. Designed for industrial, medical, computing, communications, telecom,
consumer, and other OEM applications, deployable in 1U customer systems. All models offer universal AC
input capability with active power factor correction (PFC) and compliance to worldwide safety and EMC
standards.
ORDERING GUIDE (BASIC MODEL NUMBER)
Model Number
Main output (V1)
Aux Output (V2)
Max. Load
Capacitance
Main output
Voltage
VDC
Current
@ 50°C
250W
Current
@ 70°C
1
200W
VDC
Current
50°C and 70°C
PQC250-12-xxx 12 20.8A
16.7A
5 0.5A
6000µF
PQC250-18-xxx
18
13.8A
11.1A
1,600uF
PQC250-24-xxx
24
10.4A
8.3A
1200µF
PQC250-30-xxx
30
8.33A
6.6A
1000µF
PQC250-36-xxx
36
6.9A
5.6A
1000µF
PQC250-48-xxx (PoE Compliant)
48
5.2A
4.2A
750µF
PQC250-54-xxx (PoE Compliant)
54
4.6A
3.7A
500µF
PQC-COVER
Optional cover kit assembly see PQC-COVER datasheet for details
1 Output De-Rating at 70°C is for horizontal orientation with component side up only. Please refer to ACAN-77 for details
2
29V model available, consult with factory for more information
FEATURES
Industry leading MTBF
Certified to IEC60601 Ed.3 medical (2 x MOPP Pri-Sec; 1 x
MOPP Pri-Chassis Ground), AC input models.
60950-1 compliant
IEC60335-1 Certificate
Designed to comply with IEC60601-1-2 4th Edition EMC
Standard Requirements
1
250W Convection, 100Vac to 264Vac +50C operation
Very low no load standby power; designed to meet
ENERGY STAR® Program Requirements for Single Voltage
External AC-DC Power Supplies
True zero load operation of the Main (V1) output; no
minimum load requirements
3" x 5" industry standard footprint
Optional DC input capability
High efficiency 94% typical
Remote sense, main output
Universal AC input with active PFC
Less than 1U high
RoHS compliant
Active inrush protection
Compatibility with MVAC250 Series products,1
Droop current share, output Terminal block option
Two-year warranty
1 fan output of MVAC250 series not available on this product
1 Consult with factory for details and availability
2 Medical certification applies to AC input models only.
OUTPUT CHARACTERISTICS
Parameter
Conditions
Min
Nom
Max
Units
Line, Load Regulation
Main (V1) Output1
±1
%
Aux (V2) Output
±5
Minimum Load Capability
Stable Operation
0
A
Output Ripple3
Zero to Full Load2
1%
mVP-P
1 zero load output voltage may exceed the regulation window however will not cause OVP to engage or PWROK to change to low state. 200mA min. load
current is required to keep output voltage within ±1%.
2 Ripple and noise are measured with 0.1uF ceramic capacitor and 10uF tantalum capacitor. A short coaxial cable with 50 ohm termination is used.
3
1% of nominal output voltage.
AUXILIARY OUTPUT CHARACTERISTICS (ALL MODELS)
Auxiliary Output
Aux Output
Voltage
Load Current Load Capacitance
Line, Load, Cross
Regulation
Ripple Voltage &
Noise
Aux (V2)
5V
0 to 0.5A
0 to 220µF
± 5%
120mVp-p
M
INPUT CHARACTERISTICS
Parameter
Conditions
Min
Nom
Max
Units
Input Voltage AC Operating Range
Single Phase
90
100/240
264
VAC
Input Frequency
47
50/60
63
Hz
Turn-on input voltage
Input rising
75
90
VAC
Turn-off input voltage
Input falling
65
80
VAC
2 DC input1 refer to:
Part_Number_Options_Guide
127
300
260
400
Maximum input current
Vin = 115VAC; Full Load
2.5
Arms
2Vin = 127-300
2.7
A
2 Vin = 260-400
1.5
A
Inrush Current
230VAC,Cold start, 25°C;
30
Apk
Power Factor
At 115VAC, full load
0.95
W/VA
Hold-up Time
90VAC; Full Load
16
msec
Efficiency @ 230VAC for PQC250-48
model.
20% Full Load
88.5
%
50% Full Load
94
100% Full Load
95
No Load Input Power Consumption
(PS_ON = OFF; Aux (V2) = 0A
<0.5
W
Available now at www.murata-ps.com/en/3d/acdc.html
CB Test Certificate and Test Reports available upon request
For
full details go to
www
.murata-ps.com/rohs
Applies to AC Input models
Certificate and Test Report
12V Model
PQC250 Series
250W 3" x 5" Convection Cooled AC-
DC Power Supply
www.murata-ps.com/support
PQC250.A13 Page 2 of 8
MAIN OUTPUT CHARACTERISTICS (ALL MODELS EXCEPT WHERE NOTED)
Parameter
Conditions
Typ.
Max.
Units
Transient Response
1
50% load step, 1A/µsec slew rate and min 0.1A load
± 5 %
Settling Time to 1% of Nominal
500
µsec
Turn On Delay
After application of input power
3
sec
Output Voltage Rise
Monotonic
50
msec
Remote Sense
Compensates for up to 120mV of total lead drop (output and return connections) with
remote sense connected. Protected against short circuit and reverse connection.
120 mV
1 Min. 1 second time between consecutive transients.
ENVIRONMENTAL CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Units
Storage Temperature Range
-40
85
°C
Operating Temperature Range
See power derating curves -10 70
Start up with -20C @ 100VAC minimum input
*contact Murata for lower operating temperature range -20 -
Operating Humidity
Non-condensing
10 95
%
Operating Altitude
-200 2 5000
m
MTBF
Telcordia SR-332 Issue 3; M1C3 @ 40°C
Telcordia SR-332 Issue 3; M1C3 @ 25°C
2,145K
4,500K Hours
Shock 30G, non-operating Complies
Operational Vibration Sine Sweep; 5-150Hz, 2G
Random Vibration, 5-500Hz, 1.11G
Complies
Safety – Medical Standards
2 x MOPP (Primary-Secondary)
IEC60601-1 (Ed. 3) – CB Cert and Report ANSI/AAMI ES60601-1 (2005+C1:09+A2:10) (Designed to comply with IEC60601-1-2 4th Edition
EMC Standard Requirements3)
CAN/CSA 22.2 No. 60601-1 (2008) 3rd Edition
EN60601-1:2006+CORR:2010
Safety – ITE, Audio/Video &
Consumer Standards
IEC/EN/UL/CSA 60950-1
IEC/EN/UL/CSA 60335-1
CE Marking per LVD
IEC62368-11
Fuses Dual Fuses; Line and Neutral; 6.3A Time Lag; 250V
Outside Dimensions
3.0" x 5.0" x 1.44" (76.2mm x 127mm x 35.2mm) nominal
Weight (typ.)
0.352/0.78
kg/lbs
1
Planned submission, contact Murata for additional details
2 3000 M max. altitude for Medical applications
3
when deployed in End User Systems
PROTECTION CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Units
Over Voltage Protection
V1 (main output) latching
115
140
%
V2 (aux output) latching
5.5
7.5
V
Over Current Protection
V1, hiccup mode
120
150
%Amax
V1, latch mode
160
Short circuit
V2, auto-recovery
110
150
Over Temperature Protection (Primary and Secondary Heatskink Temperature)
Auto-recovery
125
130
°C
Remote Sense Short Circuit Protection
Complies
Remote Sense Reverse Connection Protection Complies
ISOLATION CHARACTERISTICS
Parameter
Conditions
Min.
Typ.
Max.
Units
Isolation
Primary to Chassis
1500
VAC
Primary to Secondary (2xMOPP)
4000
Secondary to Chassis
1500
Output to Output
1500
Earth Leakage Current (under single fault condition)
264V
AC
, 60Hz, 25°C
300
µA
Earth Leakage Current (under normal conditions)
264V
AC
, 60Hz, 25°C
150
µA
PQC250 Series
250W 3" x 5" Convection Cooled AC-
DC Power Supply
www.murata-ps.com/support
PQC250.A13 Page 3 of 8
CURRENT SHARING OPTION – PQC250-XX-DXX
Model Number
Description
PQC250-XX-Dxx
Refer to ACAN-78
for additional
details
Main Output current share is achieved using “the droop method”. Nominal output voltage is achieved at 50% load and output voltage increases/decreases
approximately ±3% of nominal voltage. This regulation window does not include the additional tolerance due to line, temperature, long term stability etc.
Startup of parallel power supplies is not internally synchronized. If more than 250W combined power is needed, start-up synchronization must be provided
by system using a common PS_ON signal. To account for ±10% full load current sharing accuracy and the reduction in full load output voltage due to
droop, available output power must be derated by 15% when units are operated in parallel. Current sharing can be achieved with or without remote sense
connected to the common load.
ORing protection is available on the PQC250-xxDRT models (see Application notes, ACAN-78 for additional details);
Aux (V2) output can be tied together for redundancy but total combined output power must not exceed 2.5W, external ORing devices are recommended to
preserve redundancy.
EMISSIONS AND IMMUNITY
Characteristic
Standard
Compliance
Input Current Harmonics
IEC/EN 61000-3-2
Class A
Voltage Fluctuation and Flicker
IEC/EN 61000-3-3
Complies
Conducted Emissions EN 55022 Class B
FCC Part 15 Class B
Radiated Emissions CISPR 22 -3 meter Class B
FCC 15.109 - 3 meter
Class B
ESD Immunity IEC/EN 61000-4-2 Level 4, Criterion 2
Radiated Field Immunity IEC/EN 61000-4-3 Level 3, Criterion A
Electrical Fast Transient Immunity IEC/EN 61000-4-4 Level 4, Criterion A
Surge Immunity
IEC/EN 61000-4-5
Level 3, Criterion A (Com. Mode: 2kV 12 OHM, Diff.
Mode: 1kV, 2 OHM)
Radiated Field Conducted Immunity
IEC/EN 61000-4-6
Level 3, 10V/m, Criterion A
Magnetic Field Immunity IEC/EN 61000-4-8 Level 3, Criterion A
Voltage dips, interruptions IEC/EN 61000-4-11 Level 3, Criterion B
EMI
CONSIDE
STATUS AND CONTROL SIGNALS
Parameter
Models
Conditions
PS_ON All Models This pin must be pulled low (sink current >2mA) to +5V_AUX_RTN to turn on the main output. The +5V_AUX output is independent of the PS_ON
signal, and comes up automatically when the input AC or input DC voltage is applied within their specified operating ranges.
PWR_OK All Models Open collector logic goes high 40-100ms after the main output is within regulation; it goes low at least 2msecs before loss of regulation. Internal
10K pull up to +5V_Aux is provided. Applications using the PWR_OK signal should maintain a minimum load of 5W on the main output.
PART NUMBER STRUCTURE
PQC
250
-
xx
-
yyy
Options
D1 = Droop
DRT = ORing; Droop; Output Terminal Block
H = DC input2 Link back to Input_Table
PQC= “Power, Quality, Convection Cooled”
Main Output Voltage
(12, 18, 24, 36, 48, 54)
Output Power (Watts)
Examples: PQC250-24 = Base 24V Model; no options
PQC250-24D = Base model, 24V Model with Droop Current Share option
PQC250-24DRT= Base model, 24V Model with Droop Current Share, ORing isolation and Terminal Block options
1 not available for 18V model
2
CCC Certification not included for “H” models and 30V models
EMI CONSIDERATIONS
For optimum EMI performance, the power supply should be mounted to a metal plate grounded to all 4 mounting holes of the power supply. To comply with safety standards,
this plate must be properly grounded to protective earth (see mechanical dimension notes). Pre-compliance testing has shown the stand-alone power supply to comply with
EN55022 class B radiated emissions with a metal enclosure with grounded base plate. See PQC-COVER for details - testing was based on adding a toroid, Fair-
Rite#5961004901 with five turns of both of the output leads. Radiated emission results vary with system enclosure and cable routing paths.
PQC250 Series
250W 3" x 5" Convection Cooled AC-
DC Power Supply
www.murata-ps.com/support
PQC250.A13 Page 4 of 8
PERFORMANCE TYPICAL DATA EXAMPLES
Efficiency 48V Model
Ripple, 12V Model
Transient Performance, 12V Model
Transient Performance, 12V Model
PQC250 Series
250W 3" x 5" Convection Cooled AC-
DC Power Supply
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PQC250.A13 Page 5 of 8
PERFORMANCE DATA
Start Up Performance ,12V Model shown
THERMAL CONSIDERATIONS
System thermal management is critical to the performance and reliability of the PQC250 series power supplies. Performance derating curves are provided
which can be used as a guideline for what can be achieved in a system configuration with controlled airflow at various input voltage conditions.
The product is designed to provide 250W using natural convection cooling when mounted horizontally with un-obstructed convection current airflow flow at
room temperature. At elevated temperature the power supply data is taken while it is surrounded by a large vented enclosure to minimize forced cross flows
inherent in the elevated temperature test.
The product is capable of operation when mounted in other orientations; operational/derating curves shall be provided to show the effect of such mounting.
See ACAN-77 for additonal details
Capacitor case temperature and Mounting Orientation:
The power supply can operate in any orientation; however, the power supply contains overtemperature protection that will shut off the output as the
temperature of the power supply heatsinks approach the limt specified in the protection table. Additonally, life expectantcy of the power supply is inversely
proportional to the case temperature of electrolytic capacitors C25, C25A, C711 & C712. The designer of the system in which this power supply is deployed
should consider this relationship to ensure optium product life. The following charts illustrate this relationship:
The PQC250 Series will also benefit from the provision of forced cooling airflow (generated by an external host system fan). This will enable operation at
potentially higher local surrounding ambient temperatures.
Please refer to ACAN-78 for additonal details
Derating Curve vs. Temperature (based on horizontal mounting, PTH components facing up, natural convection)
Derating curves are provided to indicate operation at varying input voltages with respect to temperature. See ACAN-77 for more details
Link Back to Thermal Considerations; Ordering Guide
PQC250 Series
250W 3" x 5" Convection Cooled AC-
DC Power Supply
www.murata-ps.com/support
PQC250.A13 Page 6 of 8
WIRING DIAGRAM FOR OUTPUT
Note: For parallel (current share) operation it is required to connect the sharing power supplies in parallel (+DC out connected together and DC out Return connected together on
sharing power supplies. Since each output has an identical “droop” share characteristic then each output will intrinsically share the total load current. See ACAN-78 for more
details.
PQC250x
PQC250 Series
250W 3" x 5" Convection Cooled AC-
DC Power Supply
www.murata-ps.com/support
PQC250.A13 Page 7 of 8
MECHANICAL DIMENSIONS (Nominal)
PQC250-xx and PQC250-xxD MODELS
PQC250-xxDRT MODELS
Link Back to Thermal Considerations
C712
C711
C25A
C25
Primary Heatsink
Secondary Heatsink
Link Back to Description
Primary Heatsink
Secondary Heatsink
C712
C711
C25A
C25
PQC250 Series
250W 3" x 5" Convection Cooled AC-
DC Power Supply
www.murata-ps.com/support
PQC250.A13 Page 8 of 8
INPUT/OUTPUT CONNECTOR AND SIGNAL SPECIFICATION AND MATING CONNECTORS – PQC250 series
Connector
PIN
Description
Mating Housing
Crimp terminal/pins
Input Connector J1:
Molex 26-62-4030
1
AC Neutral
Molex 0009930300
Molex 0008500105 (18-24 AWG) Molex
0008500107 (22-26 AWG)
3
AC Line
Output Connector J2:
Molex 39-28-1123
1,2,3,4,5,6
+DC_OUT
Molex 0039012125
Molex 0039000038
7,8,9,10,11,12
+DC_OUT_RTN
Output Connector J3:
Molex 90130-1108
1
+5V_AUX
Molex 0901420008
Molex 0901190109
2
PWR_OK
3
DO NOT USE
4
PS_ON
5
+Remote Sense
6
-Remote Sense
7
DO NOT USE
8
+5V_AUX_RTN
APPLICATION NOTES
Document Number
Description
Link to Document
ACAN-77 Thermal deployment notes http://power.murata.com/datasheet?/data/apnotes/acan-77.pdf
ACAN-78 Current Sharing deployment notes http://power.murata.com/datasheet?/data/apnotes/acan-78.pdf
PQC-COVER cover kit assembly datasheet
https://power.murata.com/data/acdcsupplies/pqc250-cover.pdf
Links back to:
Thermal Considerations
Order Guide
Current Sharing Option
Murata Power Solutions, Inc.
129 Flanders Road
Westborough, MA 01581
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating
require
ments and the Life and Safety Critical Application Sales
Policy.
Refer to: http://www
.murata-ps.com/requirements/
Murata Power Solutions, Inc. (“Murata”) 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. Buyer represents and agrees that
it
has all
the necessary expertise to create and implement safeguards that anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm, and
take appropriate remedial actions. Buyer will fully indemnify Murata, its affiliated companies, and its representatives against any damages arising out of the use of any Murata products in safety-critical applications.
Specifications are
subject
to change without
notice.
©
2016 Murata Power Solutions,
Inc.
SAFETY CONSIDERATIONS
1. This power supply is a component level power supply intended for use in Class I or Class II applications. Secondary ground traces need to be suitably
isolated from primary ground traces when used in Class II applications.
2. When the power supply is used in Class II equipment, all ground traces and components connected to the primary side are considered primary for spacing
and insulation considerations.
3. Protective bonding conductor from the end product protective earthing terminal must be tied to TB1. For optimum EMI performance, while maintaining
Class I safety isolation all 4 mounting holes must be tied to the end product protective earthing terminal. To maintain Class II safety isolation mounting
holes MTG1 and MTG2 need to be isolated from protective earth and should use standoffs of non-conductive material.
4. This power supply requires mounting standoffs of minimum 6mm in height. If there is risk of chassis deformation or shorter standoff height is required, an
appropriate insulator must be used under the power supply with adequate extension beyond the outline of the power supply. In all cases, the applicable
safety standards must be applied to ensure proper creepage and clearance requirements are met.
5. The primary heatsink is considered a live primary circuit, and should not be touched. It is recommended that the primary heatsink be kept at least
6. This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy:
http://www.murata-ps.com/requirements/
7. Used only in non-tropical conditions.
