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date 01/31/2018
page 1 of 10
SERIES: VOF-300 │ DESCRIPTION: AC-DC POWER SUPPLY
MODEL output
voltage
output
current
output
power1
ripple
and noise2
efciency3
(Vdc)
max
(A)
max
(W)
max
(mVp-p)
typ
(%)
VOF-300-12 12 25 300 120 92.5
VOF-300-24 24 12.5 300 150 93.5
VOF-300-36 36 8.34 300 150 93.5
VOF-300-48 48 6.25 300 150 94
Vstb45 1 5 100 --
Notes: 1. Maximum output power of 300 W (5 W for Vstb) with 10 CFM forced air, 200 W (3 W for Vstb) with convection cooling.
2. At full load, nominal input, 20 MHz bandwidth oscilloscope, output terminated with 10 μF electrolytic and 0.1 μF ceramic capacitors.
3. At full load, 25°C, 230 Vac input.
4. Standby output voltage. Present on all models.
5. All specications are measured at Ta=25°C, 230 Vac input voltage, and 60% rated output load unless otherwise specied.
FEATURES
• up to 300W continuous power
• universal input voltage range
• industry standard 3” x 5” footprint
• power factor correction
• remote voltage sense
• remote on/off control
• fan & 5 Vdc aux outputs
• covered and open-frame configurations
• over voltage, over current, over temperature, and short circuit protections
• UL/cUL & TUV safety approvals
• efficiency up to 94%
PART NUMBER KEY
Base Number
VOF-300 - XX - XXX - X
Output Voltage Chassis:
“blank” = open-frame
CNF = covered
Input Connector:
“blank” = TAIWAN KING PIN
TERMINAL PVHI series
1 = LONG CHU P3060 series
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date 01/31/2018 │ page 2 of 10CUI Inc │ SERIES: VOF-300 │ DESCRIPTION: AC-DC POWER SUPPLY
INPUT
parameter conditions/description min typ max units
voltage 90 264 Vac
frequency 47 63 Hz
current at 100 Vac
at 240 Vac
4.0
1.8
A
A
inrush current at 240 Vac, 25°C, cold start 30 A
leakage current 3.5 mA
power factor correction meets EN 61000-3-2
no load power consumption measured with the PS-ON signal congured to OFF 0.3 W
OUTPUT
parameter conditions/description min typ max units
output capacitance
at 115/230 Vac, full load
12 Vdc output models
24 Vdc output models
36 Vdc output models
48 Vdc output models
25,000
12,500
5,000
3,750
μF
μF
μF
μF
initial set point accuracy
at full load, 25°C
Vo
Vstb
±1
±3
%
%
line regulation
high line to low line at full load
Vo
Vstb
±0.5
±1
%
%
load regulation
from full to 10% load
Vo
Vstb
±1
±5
%
%
hold-up time at 115 Vac 16 ms
adjustability built in trim pot (VR) ±5 %
switching frequency at full load 60 80 kHz
temperature coefcient ±0.05 %/°C
PS-ON signal1
power on PS-ON 0 2 Vdc
PS-ON = 0V 4.5 mA
power off PS-ON = NC (internal circuit will drive PS-On to 11~16 Vdc)
PS-ON = NC 0 mA
power good (PG) TTL goes high 50~250 ms after powered on
TTL goes low 5~20 ms before 90% Vo
standby output voltage 5 Vdc / 1 A
fan output 12 Vdc / 500 mA
Notes: 1. When not used, short PS-ON & signal GND.
PROTECTIONS
parameter conditions/description min typ max units
over voltage protection
latch mode
12 Vdc output models
24 Vdc output models
36 Vdc output models
48 Vdc output models
15
30
43
56
Vdc
Vdc
Vdc
Vdc
over current protection hiccup, auto recovery 130 150 180 %
short circuit protection auto recovery
over temperature protection auto recovery (temperature of C37) 110 °C
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date 01/31/2018 │ page 3 of 10CUI Inc │ SERIES: VOF-300 │ DESCRIPTION: AC-DC POWER SUPPLY
SAFETY & COMPLIANCE
parameter conditions/description min typ max units
isolation voltage
input to output for 1 minute
input to earth for 1 minute
output to earth for 1 minute
3,000
1,500
500
Vac
Vac
Vac
isolation resistance 100 MΩ
safety approvals IEC60950-1, EN60950-1, UL60950-1 (2nd edition)
safety class class I
conducted emissions EN55032:2012+AC:2013, EN55022:2010+AC:2011, Class B , FCC CFR 47 Part 15 Subpart B
radiated emissions EN55032:2012+AC:2013, EN55022:2010+AC:2011, Class B , FCC CFR 47 Part 15 Subpart B
harmonic current emissions IEC 61000-3-2:2014, Class C & D
voltage uctuations & icker IEC 61000-3-3:2013
ESD IEC 61000-4-2:2008, ±2kV, ±4kV, Class A
radio-frequency, Continuous
radiated disturbance IEC 61000-4-3:2010, Class A
EFT/burst IEC 61000-4-4:2012, ±0.5kV, ±1kV, ±2kV, Class A
surge IEC 61000-4-5:2005, L-N: ±0.5kV, ±1kV, L-PE, N-PE: ±0.5kV, ±1kV, ±2kV, Class A
conducted immunity IEC 61000-4-6:2013, Class A
power frequency magnetic eld IEC 61000-4-8:2009, Class A
voltage dips IEC 61000-4-11:2004, Dip: 30% reduction, Dip: 70% reduction, Class A
voltage interruptions IEC 61000-4-11:2004, >95% reduction, Class B
MTBF as per MIL-HDBK-217F, at 115 Vac, 25°C, GB 160,000 hours
RoHS 2011/65/EU
Notes: 1. The power supply is considered a component which will be installed into nal equipment. The nal equipment still must be tested to meet the necessary EMC directives.
ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature see derating curves -40 80 °C
storage temperature -40 85 °C
operating humidity non-condensing 93 %
operating altitude 5000 m
vibration2as per MIL-STD-810F Table 514.5C-VIII; 15~2000
Hz for 1 hour on each axis for 3 hours 4G
shock2as per MIL-STD-810F Table 516.5, Table 516.5-1;
for 10 ms on each axis 3 times 75 G
Notes: 2. See Installation Instructions for mounting requirements.
DERATING CURVES
VOF-300 Output Power vs. Input Voltage
(Natural Convection)
Input Voltage (Vac)
Load (W)
90
150
200
250
100
50
110 130 150 170 190 210 230 250
300
264
VOF-300-CNF Output Power vs. Input Voltage
(Natural Convection)
Input Voltage (Vac)
Load (W)
90
150
200
250
100
50
110 130 150 170 190 210 230 250
300
264
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date 01/31/2018 │ page 4 of 10CUI Inc │ SERIES: VOF-300 │ DESCRIPTION: AC-DC POWER SUPPLY
DERATING CURVES (CONTINUED)
VOF-300-CNF Output Power vs. Ambient Temperature
(with 10 CFM airow)
Ambient Temperature (°C)
Load (%)
-40
60
80
100
40
20
-30 010406080
-20 -10 20 30 50 70
VOF-300-CNF Output Power vs. Ambient Temperature
(Natural Convection)
Ambient Temperature (°C)
Load (W)
-40
150
200
250
100
50
-30 010406080
-20 -10 20 30 50 70
300
Input voltage 220~264 Vac
Input voltage 100~200 Vac
VOF-300 Output Power vs. Ambient Temperature
(with 10 CFM airow)
Ambient Temperature (°C)
Load (%)
-40
60
80
100
40
20
-30 010406080
-20 -10 20 30 50 70
VOF-300 Output Power vs. Ambient Temperature
(Natural Convention)
Ambient Temperature (°C)
Load (W)
-40
150
200
250
100
50
-30 010406080
-20 -10 20 30 50 70
300
Input voltage 220~264 Vac
Input voltage 90~200 Vac
EFFICIENCY CURVES
12 Vdc Output Efciency Curve
(at 25°C)
24 Vdc Output Efciency Curve
(at 25°C)
36 Vdc Output Efciency Curve
(at 25°C)
48 Vdc Output Efciency Curve
(at 25°C)
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date 01/31/2018 │ page 5 of 10CUI Inc │ SERIES: VOF-300 │ DESCRIPTION: AC-DC POWER SUPPLY
MECHANICAL
parameter conditions/description min typ max units
dimensions VOF-300 models: 5.00 x 3.00 x 1.38 (127 x 76.2 x 35.1 mm)
VOF-300-CNF models: 5.35 x 3.46 x 1.59 (136 x 88 x 40.4 mm)
inch
inch
weight VOF-300 models
VOF-300-CNF models
420
550
g
g
cooling external fan
CN1 input connector CN1 mates with JST housing VHR series or equivalent
CN1 input connector (optional) CN1 mates with MOLEX housing 5195 series or equivalent
CN4 output connector CN4 mates with JST housing PH series or equivalent
CN5 output connector CN5 mates with JST housing PH series or equivalent
output terminals +Vo & -Vo terminals are M3 screws that mate with round or Y
terminals with max OD of 6.75 mm and max ID of 3.9 mm
MECHANICAL DRAWING
CN1
PIN Function
1 ACL
2 -
3 ACN
CN4
PIN Function
1 -FAN
2+FAN
3GND
4+5 VSB
5GND
6PS-ON
CN5
PIN Function
1GND
2PG
3 -Sense
4+Sense
1
ACL
ACN
+Vo
10CFM
Air flow
direction
FAN
CN1
1.123 [28.52]max
0.197 [5.00]max
0.063 [1.60]
5mm
4.551 [115.60]
5.000 [127.00]
0.224 [5.70]
2.551 [64.80]
3.000 [76.20]
0.224 [5.70]
2
3
-Vo
CN5
4
3
2
1
4-M4
*0.7
1
CN5
4
2
3
cross sectional view A
Scale 1:1
1
2
3
4
5
6
CN
4
VR
Open-frame
units: inch [mm]
tolerance: X.XXX = ±0.020 [±0.50]
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date 01/31/2018 │ page 6 of 10CUI Inc │ SERIES: VOF-300 │ DESCRIPTION: AC-DC POWER SUPPLY
CN1
PIN Function
1 ACL
2 -
3 ACN
CN4
PIN Function
1 -FAN
2+FAN
3GND
4+5 VSB
5GND
6PS-ON
CN5
PIN Function
1GND
2PG
3 -Sense
4+Sense
+Vo
FAN
Air flow
direction
10CFM
VR
CN4
1
CN5
1.591 [40.40]
5mm
3.46 [88.00]
5.35 [136.00]
3.43 [87.00]
-Vo
4
2.55 [64.80]
0.437 [11.10]
0.402 [10.20]
4.55 [115.60]
2
3
1
AC
L
AC
N
CN1
2
3
cross sectional view A
Scale 1:1
1
2
3
4
5
6
Covered
units: inch [mm]
tolerance: X.XXX = ±0.020 [±0.50]
MECHANICAL DRAWING (CONTINUED)
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date 01/31/2018 │ page 7 of 10CUI Inc │ SERIES: VOF-300 │ DESCRIPTION: AC-DC POWER SUPPLY
INSTALLATION INSRUCTIONS
Type 1
Mounting from top with spacers (required to meet
vibration specications)
Spacer: 4 mm diameter max, 8 mm high minimum
Screw Size: (4) M3X0.5
Mounting torque: 3 kgf-cm
Type 2
Mounting from top without spacers
Screw Size: (4) M3X0.5
Mounting torque: 3 kgf-cm
Type 3
Mounting from bottom
Screw Size: (4) M4X0.7
Mounting torque: 7 kgf-cm
The VOF-300 series has (4) 4 mm diameter mounting holes that can be used in (3) types of installations.
Mounting Torque
VOF-300-CNF
VOF-300
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date 01/31/2018 │ page 8 of 10CUI Inc │ SERIES: VOF-300 │ DESCRIPTION: AC-DC POWER SUPPLY
INSTALLATION INSRUCTIONS (CONTINUED)
Output Terminals
Mate with round or Y terminals with max OD of 6.75 mm and max ID of 3.9 mm
Terminal Size: (2) M3
Torque: 3 kgf-cm
Mounting Clearance
Allow at least 4 mm side clearance and 5 mm height clearance. If clearances aren’t met, the isolation and withstand
specications may not be met.
Field Ground
Should be connected to the earth (ground) terminal of the apparatus otherwise conducted noise and output noise will
increase.
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date 01/31/2018 │ page 9 of 10CUI Inc │ SERIES: VOF-300 │ DESCRIPTION: AC-DC POWER SUPPLY
On/off Remote Control
A PS On/Off remote control is provided in CN4. See Figure 1 for the PS-ON diagram and control function.
APPLICATION NOTES
VOF-300
Figure 1
Note: Power on: VPS-ON ≤ 2V, IPS-ON ≥ 2 mA
(PS-ON and GND short, IPS-ON = 4.5 mA typical)
Power off: Open circuit, VPS-ON = 11~16 V
When the PS On/off remote control function is not
used, connect a short circuit between the PS-ON
control & the signal GND.
Output Remote Sensing
The VOF-300 series can remotely sense both lines of the output. The feature moves the effective voltage regulation point
from the output of the unit to the point of connection of the remote sense pins. This feature automatically adjusts the real
output in order to compensate for voltage drops in distribution and maintain a regulated voltage at the point of load. The
remote sense voltage range is as follows:
[(+Vout) – (-Vout)] – [(+Sense) – (-Sense)] ≤ 10% Vo_nominal
If the remote sense is not used, the sense pins should be connected locally to the respective Vout pins. The remote sense pins are located
on CN4.
AC_L
AC_N
PE
VOF-300
Series
+Vo
-Vo
+Sense
-Sense
Load
Figure 2
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date 01/31/2018 │ page 10 of 10CUI Inc │ SERIES: VOF-300 │ DESCRIPTION: AC-DC POWER SUPPLY
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 12/06/2016
1.01 updated datasheet 01/31/2018
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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