MVAC250 Series

250W High Density AC-DC Power Supply

MVAC250.A03 Page 2 of 8

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ENVIRONMENTAL CHARACTERISTICS

Parameter

Conditions

Min.

Typ.

Max.

Units

Storage Temperature Range

-40

85

°C

Operating Temperature Range

See power rating curves

-10

70

Start up

-20

Operating Humidity

Non-condensing

10

95

%

Operating Altitude

-200

5000

m

MTBF

Telcordia SR-332 M1C3 @25°C

474K

Hours

Shock

Operating, MIL-HBK-810E

Complies

Non-operating, MIL-HBK-810E

Complies

Operational Vibration

IEC-68-2-27 standard

Complies to levels of IEC721-3-2

Safety

IEC60950-1:2006/A11:2009

UL60950-1 2nd Ed. 2007-03-27, CSA22.2 N0.60950-1 2nd Ed. 2007.03,

EN60950-1:2006+A11:2009 (Pending)

IEC60601-1 Ed. 3 MOOP

ANSI/AAMI ES60601-1 (2005+C1:09+A2:10), CSA 22.2 No. 60601-1 (2008) 3rd Edition MOOP

EN60601-1:2006 3rd ed. MOOP (Pending)

CE Marking per LVD

Warranty

2 years

Outside Dimensions

3.0" x 5.0" x 1.4" (76.2mm x 127mm x 35.6mm)

Weight

MVAC250-xxF: 0.73 lbs (332.9g); MVAC250-xxAFD: 0.76 lbs (344.7g)

RESIDUAL RISK (PER ISO 14971 & IEC60601-1) FOR USER CONSIDERATION

Fault Condition

Residual Risk

Complies

Contact your Murata salesperson for details

PROTECTION CHARACTERISTICS

Parameter

Conditions

Min.

Typ.

Max.

Units

V1 (main output) latching

110

125

%

V3 (aux output: MVAC250-xxAFD) latching

5.5

7.5

V

V1, hiccup mode

110

130

%Amax

Over Temperature Protection

Auto-recovery

Complies

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

3000

Secondary to Chassis

500

Output to Output

500

Earth Leakage Current (under single fault condition)

MVAC250-xxAFD: 264Vac, 60Hz, 25°C

300

µA

MVAC250-xxF: 264Vac, 60Hz, 25°C

350

Earth Leakage Current (under normal conditions)

MVAC250-xxAFD: 264Vac, 60Hz, 25°C

150

MVAC250-xxF: 264Vac, 60Hz, 25°C

250

CURRENT SHARING OPTION – MVAC250-xxAFD ONLY

Model Number

Description

MVAC250-12AFD

MVAC250-24AFD

MVAC250-48AFD

Current Sharing Notes:

Main Output: Current share is achieved using the droop method. Nominal output voltage is achieved at 50% load and output voltage drops at

a rate of 48mv per amp for 12V output, 192mV per amp for 24V output, and 800mV per amp for 50V output. Startup of parallel power supplies

is not internally synchronized. If more than 250W combined power is needed, start-up synchronization must be provided by 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. If ORing protection is desired, please contact Murata sales for external ORing FET board or external ORing FET

reference circuit design.

Aux (V3) output can be tied together for redundancy but total combined output power must not exceed 10W, external ORing devices must be

used.

Fan (V2) can be tied together for redundancy but total combined output power must not exceed 12W, external ORing diodes can be used.