PSK-4-3

AC/DC PCB Mount Power Supply (PSU), ITE & Household, 1 Output, 4 W, 3.3 V, 1.2 A

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Manufacturer: CUI
Product type: AC / DC PCB Mount Power Supplies
SVHC: Lead (21-Jan-2025)
Depth: 41.1mm
Width: 21mm
Height: 20mm
Product Range: PSK-4 Series
No. of Outputs: 1 Output
Output Power Max: 4W
Input Voltage VAC: 85V AC to 305V AC
Power Supply Output Type: Fixed
Output Current - Output 1: 1.2A
Output Current - Output 2: -
Output Current - Output 3: -
Output Voltage - Output 1: 3.3V
Output Voltage - Output 2: -
Output Voltage - Output 3: -
Power Supply Applications: ITE & Household

Delivery and price
Units per pack	250
Price	11.04 €
Current stock	10+
Lead time	30 days

Datasheet

**date** 02/08/2023 **page** 1 of 6 

## **SERIES:** PSK-4 **DESCRIPTION:** INTERNAL AC-DC POWER SUPPLY **│** 

## **FEATURES** 

- universal input range from 85~305 Vac, 120~431 Vdc 

- high efficiency up to 82% 

- no load power <0.075W 

- operating altitude up to 5,000m 

- meets IEC/EN/UL 62368-1 

- over voltage category OVC II and OVC III 

- continuous short circuit, over current and over voltage protection 

- designed to meet IEC/EN 60335-1 

- design meets EN 55032 Class B and CISPR/FCC Class B 

|**MODEL**|C|€ca|**output**<br>**voltage**|**output**<br>**current**|**output**<br>**power**|**ripple**<br>**and noise1**|**efficiency2**|
|---|---|---|---|---|---|---|---|
|||||**max**|**max**|**max**|**typ**|
||||(Vdc)|(A)|(W)|(mVp-p)|**(%)**|
|PSK-4-3|||3.3|1.2|4|100|74|
|PSK-4-5|||5|0.8|4|100|77|
|PSK-4-12|||12|0.333|4|120|81|
|PSK-4-15|||15|0.266|4|150|81|
|PSK-4-24|||24|0.166|4|240|82|



Note:    1. Ripple and noise are measured at 20 MHz BW with 10 uF aluminum electrolytic capacitor and 0.1 uF ceramic capacitor on the output (For 3.3 Vdc output model 47 uF aluminum electrolytic capacitor and 0.1 uF ceramic capacitor.). 

2. At 230 Vac input and full load, 25°C. 

## **PART NUMBER KEY** 

## **- - PSK 4 XX** 

Base Number 

Output Voltage 

**cui** .com 

**CUI Inc │ SERIES:** PSK-4 **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 02/08/2023 **│ page** 2 of 6 

|**INPUT**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|input voltage||85<br>120||305<br>431|Vac<br>Vdc|
|operating voltage||100||277|Vac|
|frequency||50||60|Hz|
|current|at 100 Vac, full load|||0.25|A|
|inrush current|at 240 Vac, cold start, 25°C|||70|A|
|leakage current||||0.1|mA|
|no load power consumption||||0.075|W|
|**OUTPUT**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
||3.3 Vdc output model|||1,200|μF|
||5 Vdc output model|||800|μF|
|capacitive load|12 Vdc output model|||330|μF|
||15 Vdc output model|||266|μF|
||24 Vdc output model|||166|μF|
||at full load|||||
|initial set point accuracy|3.3 Vdc output model<br>5 Vdc output model||±5<br>±4||%<br>%|
||all other output models||±3||%|
||at nominal input|||||
||3.3 Vdc output model|3.135|3.3|3.465|Vdc|
|output voltage set point|5 Vdc output model<br>12 Vdc output model|4.80<br>11.64|5.0<br>12|5.20<br>12.36|Vdc<br>Vdc|
||15 Vdc output model|14.55|15|15.45|Vdc|
||24 Vdc output model|23.28|24|24.72|Vdc|
|line regulation|from high to low line, full load|||±1|%|
||0%~100% load|||||
|load regulation|3.3 Vdc output model<br>5 Vdc output model|||±5<br>±4|%<br>%|
||all other output models|||±3|%|
|switching frequency|max rated power||43||kHz|
|hold-up time|at 115 Vac||16||ms|
|**PROTECTIONS**||||||
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
||built-in a TVS component to clamp output voltage|||||
||3.3 Vdc output model|6.45||7.14|Vdc|
|over voltage protection|5 Vdc output model<br>12 Vdc output model|6.45<br>14.3||7.14<br>15.8|Vdc<br>Vdc|
||15 Vdc output model|17.1||19.5|Vdc|
||24 Vdc output model|28.5||31.5|Vdc|
|over current protection|auto recovery, hiccup|110||180|%|
|short circuit protection|auto recovery|||||



**cui** .com 

**CUI Inc │ SERIES:** PSK-4 **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 02/08/2023 **│ page** 3 of 6 

## **SAFETY & COMPLIANCE** 

|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|---|---|---|---|---|---|
|isolation voltage|input to output for 1 minute|||3,000|Vac|
|safety approvals|certified to 62368-1: IEC, EN, UL|||||
|safety class|Class II|||||
|conducted emission|EN 61204-3:2018, EN 61000-6-3:2021, EN 61000-6-4:2019, Class B|||||
|radiated emissions|EN 61204-3:2018, EN 61000-6-3:2021, EN 61000-6-4:2019, Class B|||||
|ESD|IEC 61000-4-2:2008, perf. Criteria A|||||
|radiated immunity|IEC 61000-4-3:2020, perf. Criteria A|||||
|EFT/burst|IEC 61000-4-4:2012, ±1kV, ±2kV, perf. Criteria A|||||
|surge|IEC 61000-4-5:2014+A1:2017, L-N: ±0.5kV, ±1kV, perf. Criteria A|IEC 61000-4-5:2014+A1:2017, L-N: ±0.5kV, ±1kV, perf. Criteria A||||
|conducted immunity|IEC 61000-4-6:2013+COR1:2015, perf. Criteria A|||||
|voltage dips|IEC 61000-4-11:2020, Dip: 30% Reduction, Dip >95% Reduction, perf. Criteria A|||||
|voltage interruption|IEC 61000-4-11:2020, >95% Reduction, perf. Criteria B|||||
|MTBF|per MIL-HDBK-217F at 25 °C|2,200,000|||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||0||95|%|



## **DERATING CURVES** 

**cui** .com 

**CUI Inc │ SERIES:** PSK-4 **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 02/08/2023 **│ page** 4 of 6 

## **EFFICIENCY CURVES** 

**cui** .com 

**CUI Inc │ SERIES:** PSK-4 **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 02/08/2023 **│ page** 5 of 6 

## **MECHANICAL** 

|**MECHANICAL**||||||
|---|---|---|---|---|---|
|**parameter**|**conditions/description**|**min**|**typ**|**max**|**units**|
|dimensions|1.62 x 0.83 x 0.787 [41.1 x 21.0 x 20.00 mm]||||inch|
|weight|||30||g|
|shock|Meet MIL-STD-810F table 516.5, table 516.5-1 10ms,<br>each axis 3 times (±X·±Y·±Z axis)||75||g|
|vibration|Meet MIL-STD-810F table 514.5CVIII, 15~2000Hz, X·Y·Z axis,<br>1 hour (each axis), total 3 hrs||4||g|



## **MECHANICAL DRAWING** 

units: inches: 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|+Vout|
|4|-Vout|



**cui** .com 

**CUI Inc │ SERIES:** PSK-4 **│ DESCRIPTION:** AC-DC POWER SUPPLY 

**date** 02/08/2023 **│ page** 6 of 6 

## **REVISION HISTORY** 

|**rev.**|**description**|**date**|
|---|---|---|
|1.0|initial release|02/08/2023|



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

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

**Headquarters** 20050 SW 112th Ave. Tualatin, OR 97062 **800.275.4899** 

Fax 503.612.2383 **cui** .com techsupport@cui.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.

Updated at June 3, 2026

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