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date 07/02/2019
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SERIES: VF-S250-XXA-CF │ DESCRIPTION: AC-DC POWER SUPPLY
MODEL output
voltage
output
current
output
power
ripple and
noise 1,2
efficiency
(Vdc)
max
(A)
max
(W)
max
(mVp-p)
typ
(%)
VF-S250-05A-CF 5 40 200 50 75%
VF-S250-09A-CF 9 25 225 90 83%
VF-S250-12A-CF 12 20.83 250 120 80%
VF-S250-15A-CF 15 16.67 250 150 83%
VF-S250-18A-CF 18 13.89 250 180 83%
VF-S250-24A-CF 24 10.42 250 240 83%
VF-S250-28A-CF 28 8.93 250 280 83%
VF-S250-36A-CF 36 6.93 250 360 83%
VF-S250-48A-CF 48 5.21 250 480 83%
VF-S250-54A-CF 54 4.63 250 540 83%
Notes: 1. 1% minimum load is required to maintain the ripple and regulation.
2. Ripple and noise is measured from 10 KHz to 20 MHz at output terminals with a 0.1 μF ceramic capacitor and a 22 μF electrolytic capacitor in parallel.
PART NUMBER KEY
VF - S250 - XXA - CF - XX
Base Number
Output Voltage
FEATURES
• up to 250 W continuous power
• 600W peak power within 500 µs duty duration
• metal top cover and fan
• passive power factor correction
• power good signal
• remote on/off control
• 3,000 Vac isolation voltage
• over load, over voltage, over temperature, and short circuit protections
• UL, cUL, and TUV 62368-1 safety approvals
• efficiency up to 83%
RoHS
Input/Output connector:
“blank” = Terminal block input / Terminal block output
1 = Molex input / Molex output
2 = Molex input / Terminal block output
3 = Terminal block input / Molex output
Low leakage option:
“blank” = standard specification
L = low leakage (contact factory)
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INPUT
parameter conditions/description min typ max units
voltage auto selectable 90
180
132
264
Vac
Vac
frequency 47 63 Hz
current at 110~120 Vac, cold start
at 200~240 Vac, cold start
6
3
A
A
inrush current at 115 Vac, cold start
at 230 Vac, cold start
35
70
A
A
power factor compliant to EN 61000-3-2 class A
remote on/off designated as RMSW on the CN1, requires a low signal to inhibit output, hiccup mode
OUTPUT
parameter conditions/description min typ max units
regulation ±1 %
transient response output voltage returns to within 1% in less than 2.5 ms for a 50% load change
peak transient does not exceed 5%.
start-up time at 230 Vac 1 s
hold-up time at 80% of rated maximim load 20 ms
adjustability ±5 %
switching frequency fixed 25 kHz
power good
designated as PG on the CN1, signal goes high 100~500 ms after the output
reaches regulation, signal goes low at least 1 ms before loss of regulation
(open collector).
fan drive 12 Vdc / 300 mA for external fan
PROTECTIONS
parameter conditions/description min typ max units
over voltage protection AC input needs to be reset to restart the power supply 130 %
over current protection automatically recovers 110 140 %
short circuit protection short circuit can be continuous, recovers automatically
over temperature protection auto recovery 110 °C
SAFETY & COMPLIANCE
parameter conditions/description min typ max units
isolation voltage
for 3 seconds at 10 mA max
primary to secondary:
primary to transformer core:
primary to earth chassis:
3,000
1,500
1,500
Vac
Vac
Vac
safety approvals IEC/EN/UL 62368-1
EMI/EMC EN 55032 Class B conducted / radiated, EN 61000-3-2, EN 61000-3-3, EN 55024 (IEC 61000-4-2,
IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11)
leakage current
standard model at 264 Vac
low-leakage model at 240 Vac
low-leakage model at 120 Vac
1
500
300
mA
μA
μA
RoHS yes
MTBF according to MIL-HDBK-217 at 30ºC 100,000 hrs
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Load (we)
Amment Temperature (°C)
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ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature 0 70 °C
storage temperature -20 85 °C
operating humidity non-condensing 5 90 %
storage humidity non-condensing 5 95 %
vibration acceleration ± 7.35 M/(SxS), on X, Y and Z Axis 5 50 Hz
MECHANICAL
parameter conditions/description min typ max units
dimensions 5(L) x 3.2(W) x 2(H) inches
weight 500 g
100
80
60
50
40
20
Ambient Temperature (°C)
Load (%)
010203040506070
DERATING CURVES
output power vs. ambient temperature
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HRWhAL 3,
4mm 5 JSfirr
#3763174‘
wx wv J A
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CUI Inc │ SERIES: VF-S250-XXA-CF │ DESCRIPTION: AC-DC POWER SUPPLY date 07/02/2019 │ page 4 of 5
INPUTOUTPUT
BB B
MECHANICAL DRAWING
CN1
1 ground
2 ac neutral
3 ac line
CN2
1Vo+
2Vo+
3Vo+
4Vo-
5Vo-
6Vo-
CN3
1 Power Good
2 remote switch
3RTN
Notes: 1. CN1 mates with molex part no. 09-93-0500 and molex 2478, 2578, 8818 crimp pins.
2. CN2 mates with molex part no. 09-93-0600 and molex 2478, 2578, 8818 crimp pins.
3. CN3 mates with JST part no. XHP-3 or equivalent (Chyao Shiunn JS-2001-03) and JST SXH-002T-P0.6 mating pins
4. Fan drive connector mates with JST part no. XHP-2 or equivalent
5. Mounting hole maximum M3 screw penetration depth is 2.1 mm.
units: mm
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CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website.
CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is
assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use.
CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical
component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to
affect its safety or effectiveness.
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
techsupport@cui.com
rev. description date
1.0 initial release 05/05/2009
1.01 new template applied 12/17/2011
1.02 V-Infinity branding removed 08/28/2012
1.03 updated Molex mating connector part numbers 07/18/2013
1.04 updated spec 08/13/2013
1.05 updated to be certified to 62368-1 safety standard 07/02/2019
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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