cui.com

date 03/26/2021

│ page 2 of 5

CUI Inc

│ SERIES: VOF-20B │ DESCRIPTION: AC-DC POWER SUPPLY

INPUT

parameter

conditions/description

min

typ

max

units

voltage

85

120

264

370

Vac

Vdc

frequency

47

63

Hz

current

0.5

A

inrush current

at240Vac,25°C,coldstart

70

A

leakagecurrent

0.25

mA

no load power consumption

0.10

W

OUTPUT

parameter

conditions/description

min

typ

max

units

capacitiveload

5 Vdc output model

9 Vdc output model

12 Vdc output model

15 Vdc output model

24 Vdc output model

48 Vdc output model

3,500

2,100

1,600

1,300

850

420

μF

μF

μF

μF

μF

μF

initialsetpointaccuracy

atfullload,25°C

±2

%

lineregulation

highlinetolowlineatfullload

±0.5

%

loadregulation

10%~100%load

±1

%

hold-up time

at 115 Vac

12

ms

switchingfrequency

65

kHz

temperaturecoefficient

±0.05

%/°C

PROTECTIONS

parameter

conditions/description

min

typ

max

units

overvoltageprotection

hiccup,autorecovery

overcurrentprotection

110

%

short circuit protection

hiccup,autorecovery

SAFETY & COMPLIANCE

parameter

conditions/description

min

typ

max

units

isolationvoltage

input to output

4,000

Vac

safetyapprovals

IEC62368-1/60950-1,UL62368-1/60950-1

safetyclass

class II

EMI/EMC

EN55032ClassB,FCCPart15ClassB,EN61000-

6-3, EN 61000-3-2, EN 61000-3-3, EN 55024,

EN 61204-3, EN 61000-6-1

MTBF

asperMIL-STD-217F,at115Vac,25°C,GB

300,000

hours

life time

at40°C,75%load

3

years

RoHS

yes

ENVIRONMENTAL

parameter

conditions/description

min

typ

max

units

operatingtemperature

seederatingcurve

-25

70

°C

storagetemperature

-40

85

°C

operatinghumidity

non-condensing

93

%

operatingaltitude

5000

m

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