# AC-DC,20 W,48 VDC,SIN OUT,OP FRA

![Product image](https://novapart.co/image/farnell:4919197/)

**URL**: https://novapart.co/products/VOF-20G-48/ac-dc20-w48-vdcsin-outop-fra
**SKU**: VOF-20G-48
**Manufacturer**: CUI
**Category**: Power & Line Protection || Power Supplies || AC / DC Converters || AC / DC Open Frame Power Supplies
**Price**: €13.0700
**Stock**: 10+
**Lead Time**: 141 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:4919197/)

**date** 07/14/2025 **page** 1 of 7 

## **SERIES:** VOF-20G **DESCRIPTION:** INTERNAL AC-DC POWER SUPPLY **│** 

## **FEATURES** 

- universal input 90 ~ 264 Vac 

- high efficiency up to 87% 

- compact size (2.38 x 1.30 inch) 

- low no load power consumption (<0.1 W) 

- certified to IEC/EN/UL 62368-1 

- designed to meet IEC/EN 60335-1 

- operating temperature -40 ~ 80°C (with derating) 

- class II 

- over voltage (OVC II & OVC III) and short-circuit protection 

- operating altitude 5,000 m 

- CISPR/FCC Class B 

|**MODEL**|**output**<br>**voltage**|**output**<br>**current**|**output**<br>**power**|**ripple**<br>**and noise1**|**efficiency2**|
|---|---|---|---|---|---|
|||**max**|**max**|**max**|**typ**|
||(Vdc)|(A)|(W)|(mVp-p)|**(%)**|
|VOF-20G-5|5|4.0|20|100|84|
|VOF-20G-12|12|1.67|20|120|86|
|VOF-20G-15|15|1.34|20|150|86|
|VOF-20G-24|24|0.83|20|240|86|
|VOF-20G-48|48|0.42|20|480|87|



Notes:   1. Ripple & noise are measured at 20 MHz BW with 0.1 µF ceramic capacitor and a 10 µF electrolytic capacitor. 2. Typical efficiency at 230 Vac and full load at 25°C. 

3. Unless otherwise specified, all indicators in this manual are measured at Ta=25 °C, humidity<75% RH, nominal input voltage, and output rated load. 

## **PART NUMBER KEY** 

## **- - - VOF 20G XX X** 

Base Number 

Output Voltage 

Mounting style: “blank” = chassis mount P = board mount 

**cui** .com 

Please read our datasheet & drawing disclaimer here. 

**CUI Inc │ SERIES:** VOF-20G **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 07/14/2025 **│ page** 2 of 7 

|**INPUT**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|voltage4|ac input<br>dc input|90<br>120|100~240|264<br>370|Vac<br>Vdc|
|frequency||47|50~60|63|Hz|
|current|at full load, 100 Vac|||0.6|A|
|inrush current|at 240 Vac, cold start at 25°C||35||A|
|leakage current||||0.1|mA|
|no load power consumption||||0.1|W|



Notes:   4. The safety approvals only apply to the ac input. 

|**OUTPUT**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
||5 Vdc output model|||4,000|μF|
||12 Vdc output model|||1,670|μF|
|capacitive load|15 Vdc output model|||1,340|μF|
||24 Vdc output model|||830|μF|
||48 Vdc output model|||420|μF|
|output voltage accuracy||||±2|%|
|line regulation|low line to high line|||±0.5|%|
|load regulation|10% ~ 100% load|||±1|%|
||at 115 Vac|||||
|hold-up time|5 Vdc output model||8||ms|
||all other outputs||10||ms|
|switching frequency|||65||kHz|
|**PROTECTIONS**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|over current protection|auto recovery, hiccup|110||180|%|
||latch mode (ac recycle to restart)|||||
||5 Vdc output model|||8.0|Vdc|
|over voltage protection|12 Vdc output model<br>15 Vdc output model|||16.5<br>19.6|Vdc<br>Vdc|
||24 Vdc output model|||31.5|Vdc|
||48 Vdc output model|||60.0|Vdc|
|short circuit protection|auto recovery|||||
|**SAFETY & COMPLIANCE**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|isolation voltage|input to output, for 1 minute|||4,300|Vac|
|safety approvals|certifed to 62368-1: IEC, EN, UL<br>designed to meet 60335-1: IEC, EN|||||
|safety class|Class II, IEC/EN/UL 62368-1, Ed.3.0|||||
|EMC emmision|EN 55032:2015+A11:2020, 47 CFR FCC Part 15 Subpart B, ICES-003 Issue7, EN 61204-3:2000,<br>EN 61000-6-3:2007+A1:2011+AC:2012, EN 61000-3-2:2019, EN 61000-3-3:2013+A1:2019, Class B|||||
|conducted disturbance|EN 55032:2015+A11:2020, 47 CFR FCC Part 15 Subpart B, ICES-003<br>EN 61000-6-3:2007+A1:2011+AC:2012, Class B||Issue7, EN 61204-3:2000,|||
|radiated disturbances|EN 55032:2015+A11:2020, 47 CFR FCC Part 15 Subpart B, ICES-003<br>EN 61000-6-3:2007+A1:2011+AC:2012, Class B||Issue7, EN 61204-3:2000,|||
|harmonic current emissions|EN 61000-3-2:2019|||||
|voltage fuctuations & ficker|EN 61000-3-3:2013+A1:2019|||||
|EMC immunity|EN 55035:2017+A11:2020, EN 61204-3:2000, EN|61000-6-1:2007||||
|ESD|IEC 61000-4-2:2008, perf. Criteria A|||||



**cui** .com 

Please read our datasheet & drawing disclaimer here. 

**CUI Inc │ SERIES:** VOF-20G **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 07/14/2025 **│ page** 3 of 7 

## **SAFETY & COMPLIANCE** 

|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|---|---|---|---|---|---|
|radiated immunity|IEC 61000-4-3:2020, perf. Criteria A|||||
|EFT/burst|IEC 61000-4-4:2012, ±0.5 kV, ± 1kV, perf. Criteria A|||||
|surge|IEC 61000-4-5:2014+A1:2017, L-N: ±0.5 kV, ±1 kV,|perf. Criteria A||||
|conducted immunity|IEC 61000-4-6:2013, perf. Criteria A|||||
|PFMF|IEC 61000-4-8:2009, perf. Criteria A|||||
|voltage dips|IEC 61000-4-11:2020, Dip: 30% Reduction, Dip >95% Reduction, perf. Criteria A|||||
|voltage interruptions|IEC 61000-4-11:2020, >95% Reduction, perf. Criteria B|||||
|MTBF|MIL-HDBK-217F at 25°C|1,300,000|||hours|
|RoHS|yes|||||
|**ENVIRONMENTAL**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|operating temperature|see derating curve|-40||80|°C|
|storage temperature||-40||85|°C|
|storage humidity|non-condensing|0||93|%|
|operating altitude|IEC/EN/UL 62368-1 OVC II|||5,000|m|
|**MECHANICAL**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|dimensions|board mount: 2.38 x 1.30 x 0.906 [60.5x33.0x23.00 mm]<br>chassis mount: 3.00 x 1.30 x 0.831 [76.2x33.0x21.10 mm]||||inch<br>inch|
|weight|board mount<br>chassis mount||35<br>36||g<br>g|



**cui** .com 

Please read our datasheet & drawing disclaimer here. 

**CUI Inc │ SERIES:** VOF-20G **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 07/14/2025 **│ page** 4 of 7 

## **MECHANICAL DRAWING** 

## **Board mount** 

units: inch [mm] tolerance: inch: x.xx=±0.03, x.xxx=±0.020 mm: x.x=±0.7, x.xx=±0.50 

|PIN CONNECTIONS|PIN CONNECTIONS|
|---|---|
|PIN|Function|
|1|AC(N)|
|2|AC(L)|
|3|+Vo|
|4|-Vo|



## **MECHANICAL DRAWING** 

## **Chassis mount** 

units: inch [mm] tolerance: inch: x.xx=±0.03, x.xxx=±0.020 mm: x.x=±0.7, x.xx=±0.50 

AC Input Connector (CN1): JST B3B-XH-A(LF)(SN) or equivalent 

|El<br>ah eo<br>|<br>S|<br>2<br>Bl)<br>|<br>x<br>Oy<br>cy<br>oS,<br>fea)<br>ub<br>ba<br>282<br>o|<br>So| 3<br>fisA: {II|El<br>ah eo<br>|<br>S|<br>2<br>Bl)<br>|<br>x<br>Oy<br>cy<br>oS,<br>fea)<br>ub<br>ba<br>282<br>o|<br>So| 3<br>fisA: {II|El<br>ah eo<br>|<br>S|<br>2<br>Bl)<br>|<br>x<br>Oy<br>cy<br>oS,<br>fea)<br>ub<br>ba<br>282<br>o|<br>So| 3<br>fisA: {II|El<br>ah eo<br>|<br>S|<br>2<br>Bl)<br>|<br>x<br>Oy<br>cy<br>oS,<br>fea)<br>ub<br>ba<br>282<br>o|<br>So| 3<br>fisA: {II|
|---|---|---|---|
|AC Input Connector (CN1): JST B3B-XH-A(LF)(SN) or equivalent||||
|PIN CONNECTIONS||Mating Housing|Terminal|
|PIN|Function|||
|1|AC(N)|JST XHP-3<br>or equivalent|JST<br>SXH-001T-P0.6N<br>or equivalent|
|2|-|||
|3|AC(L)|||



|DC Output Connector (CN2): JST B4B-XH-A(LF)(SN) or equivalent|DC Output Connector (CN2): JST B4B-XH-A(LF)(SN) or equivalent|DC Output Connector (CN2): JST B4B-XH-A(LF)(SN) or equivalent|DC Output Connector (CN2): JST B4B-XH-A(LF)(SN) or equivalent|
|---|---|---|---|
|PIN CONNECTIONS||Mating Housing|Terminal|
|PIN|Function|||
|1|-Vo|JST XHP-4<br>or equivalent|JST<br>SXH-001T-P0.6N<br>or equivalent|
|2|-Vo|||
|3|+Vo|||
|4|+Vo|||



**cui** .com 

Please read our datasheet & drawing disclaimer here. 

**CUI Inc │ SERIES:** VOF-20G **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 07/14/2025 **│ page** 5 of 7 

## **DERATING CURVE** 

## **EFFICIENCY CURVES** 

**cui** .com 

Please read our datasheet & drawing disclaimer here. 

**CUI Inc │ SERIES:** VOF-20G **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 07/14/2025 **│ page** 6 of 7 

## **EFFICIENCY CURVES (CONTINUED)** 

## **ELECTRICAL BLOCK DIAGRAM** 

**==> picture [42 x 9] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 1<br>**----- End of picture text -----**<br>


**cui** .com 

Please read our datasheet & drawing disclaimer here. 

**CUI Inc │ SERIES:** VOF-20G **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 07/14/2025 **│ page** 7 of 7 

## **REVISION HISTORY** 

|**rev.**|**description**|**date**|
|---|---|---|
|1.0|initial release|07/14/2025|



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. 

Please read our datasheet & drawing disclaimer here. 



## Links

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- [Supplier page](https://es.farnell.com/cui/vof-20g-48/ac-dc-20-w-48-vdc-sin-out-op-fra/dp/4919197)
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