VOFM-65G-5

**date** 06/26/2025 **page** 1 of 5 

## **SERIES:** VOFM-65G **DESCRIPTION:** INTERNAL AC-DC POWER SUPPLY **│** 

## **FEATURES** 

- universal input 90 ~ 264 Vac, 47 ~ 63 Hz 

- high efficiency up to 87 % 

- 40 ~ 65 W with natural convection 

- compact size, high power density (3 x 2 x 1.18 inch) 

- low no load power consumption (<0.21 W) 

- certified to IEC/EN/UL 60601-1 

- operating temperature -20 ~ 70°C (with derating) 

- class I and class II application 

- over voltage, over temperature, over current and short-circuit protection 

- FCC Part 15 Class B 

- medical protection (primary to secondary: 2 MOPP; primary to earth: 1 MOPP) 

- power ON LED indicator 

|**MODEL**|**output**<br>**voltage**|**output**<br>**current**|**output**<br>**power**|**ripple**<br>**and noise1**|**efficiency**<br>**level**|
|---|---|---|---|---|---|
||**typ**|**max**|**max**|**typ**|**typ**|
||(Vdc)|(A)|(W)|(mVp-p)|(%)|
|VOFM-65G-5|5|8.00|40|150|85|
|VOFM-65G-12|12|5.416|65|240|87|
|VOFM-65G-15|15|4.333|65|300|87|
|VOFM-65G-19|19|3.421|65|300|87|
|VOFM-65G-20|20|3.25|65|300|87|
|VOFM-65G-24|24|2.708|65|300|87|
|VOFM-65G-28|28|2.321|65|300|87|
|VOFM-65G-30|30|2.167|65|300|87|
|VOFM-65G-36|36|1.806|65|300|87|
|VOFM-65G-48|48|1.354|65|300|87|
|VOFM-65G-56|56|1.161|65|300|87|



Notes: 1. Ripple and noise are measured at oscilloscope 20MHz bandwidth by a 100µF electrolytic capacitor and a 0.1µF ceramic capacitor in parallel at output connector. 

## **PART NUMBER KEY** 

## **- - VOFM 65G XX** 

Base Number 

Output Voltage 

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**CUI Inc │ SERIES:** VOFM-65G **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 06/26/2025 **│ page** 2 of 5 

|**INPUT**|**INPUT**|
|---|---|
|**parameter**<br>**conditions/description**<br>**min**<br>**typ**<br>**max**<br>**units**||
|voltage<br>90<br>115~230<br>264<br>Vac||
|frequency<br>47<br>50~60<br>63<br>Hz||
|current<br>at 230 Vac<br>0.6<br>A||
|inrush current<br>at 230 Vac, cold start<br>130<br>A||
|touch current<br>0.1<br>mA||
|no load power consumption<br>at 230 Vac<br>5 Vdc output model<br>all other output models<br>0.1<br>0.21<br>W<br>W||
|**OUTPUT**||
|**parameter**<br>**conditions/description**<br>**min**<br>**typ**<br>**max**<br>**units**||
|load regulation<br>5 Vdc output model<br>all other output models<br>±5<br>±3<br>%<br>%||
|hold-up time<br>at 115 Vac, 75 % load<br>10<br>ms||
|switching frequency<br>at full load<br>65<br>kHz||
|**PROTECTIONS**||
|**parameter**<br>**conditions/description**<br>**min**<br>**typ**<br>**max**<br>**units**||
|over current protection<br>auto recovery<br>105<br>170<br>%||
|over voltage protection<br>latch of type, ac recycle||
|over temperature protection<br>latch of type, ac recycle||
|short circuit protection<br>auto recovery||
|**SAFETY & COMPLIANCE**||
|**parameter**|**conditions/description**<br>**min**<br>**typ**<br>**max**<br>**units**|
|isolation voltage|input to output, 2 MOPP, for 4 seconds<br>4,000<br>5,656<br>Vac<br>Vdc|
||input to ground, 1 MOPP, for 4 seconds<br>1,500<br>2,121<br>Vac<br>Vdc|
||output to ground, for 4 seconds<br>1,500<br>2,121<br>Vac<br>Vdc|
|safety approvals|certifed to 60601-1: IEC, EN, UL|
|safety class|class I and class II application|
|EMI/EMC|IEC 60601-1-2:2014+A1:2020<br>EN (BS EN) 60601-1-2:2015+A1:2021<br>EN 55011(CISPR 11: 2015 + A1: 2016 + A2:2019 (Ed 6.2))<br>FCC 47 CFR Part 18|
|MTBF|as per Telcordia SR-332 (Bellcore) at 25°C<br>430,000<br>hours|
|RoHS|yes|
|**ENVIRONMENTAL**||
|**parameter**|**conditions/description**<br>**min**<br>**typ**<br>**max**<br>**units**|
|operating temperature|see derating curve<br>-20<br>70<br>°C|
|storage temperature|-20<br>85<br>°C|
|operating humidity|non-condensing<br>10<br>95<br>%|
|storage humidity|non-condensing<br>0<br>95<br>%|
|operating altitude|3,000<br>m|



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**CUI Inc │ SERIES:** VOFM-65G **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 06/26/2025 **│ page** 3 of 5 

## **MECHANICAL** 

|**parameter**|||**conditions/description**|**conditions/description**|**conditions/description**||**min**|**min**|**typ**<br>**max**|**units**|
|---|---|---|---|---|---|---|---|---|---|---|
|dimensions|||77.0 × 51.0 × 30.0 [3.000 x 2.000 x 1.180 inch]|||77.0 × 51.0 × 30.0 [3.000 x 2.000 x 1.180 inch]||||mm|
|weight|||||||||120|g|
|**MECHANICAL DRAWING**|||||||||||
|units: mm [inch]|||||||||||
|tolerance: ±0.5mm|||||||||||
||||||||||**CN1**: Input Connector||
|||Ground|||||||JST B2P3-VH pitch: 7.92 mm or equivalent,||
|||(Protective bonding conductor)|||||||mates with JST SVA-41T-P1.1 or equivalent||
||||||||||PIN CONNECTIONS||
|||4x®3.5mm mounting||holes||PowerONLED|||PIN<br>Function||
||||||||||1<br>AC(N)||
||||||||||2<br>AC(L)||
||||||||||||
||||||||||**CN2**: Main Output Connector||
|43.80|| <br> —<br>SIS|—|=|<br>CaS||Os<br>8<br>3|31.00|||JST B4P-VH-B pitch: 3.96 mm or equivalent,<br>mates with JST VHR-4N or equivalent<br>PIN CONNECTIONS<br>PIN<br>Function<br>1<br>-Vo||
||||||||||2<br>-Vo||
||ry|=||zl|YY||||3<br>+Vo<br>4<br>+Vo||



units: mm [inch] 

tolerance: ±0.5mm 

Note:       1. For Class I applications, all four mounting hole positions must be securely connected to the protective earth ground during the final system assembly to ensure optimal safety and EMI performance. 

2. For Class II applications, the four mounting hole positions must remain isolated from one another. Each mounting hole should be fixed to the chassis using insulated spacers. 

3. To enhance EMI performance under Class II test conditions, the VOF-65G Series allows an additional clamp core to be applied with one turn on the AC input. 

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**CUI Inc │ SERIES:** VOFM-65G **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 06/26/2025 **│ page** 4 of 5 

## **DERATING CURVE** 

Note:       1. Derates linearly 2.5% per °C from 41°C ~ 70°C. 

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**CUI Inc │ SERIES:** VOFM-65G **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 06/26/2025 **│ page** 5 of 5 

## **REVISION HISTORY** 

|**rev.**|**description**|**date**|
|---|---|---|
|1.0|initial release|06/26/2025|



The revision history provided is for informational purposes only and is believed to be accurate. 

**==> picture [155 x 34] intentionally omitted <==**

15575 SW Sequoia Pkwy #100 Portland, OR 97224 800.275.4899 

Fax 503.612.2383 Belfuse.com powersupport@belf.com 

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.