CUS350M-36/F

AC/DC Open Frame Power Supply (PSU), ITE & Medical, 1 Output, 414W, 349.2 W, 85V AC to 265V AC

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Manufacturer: TDK-LAMBDA
Product type: AC / DC Open Frame Power Supplies
SVHC: No SVHC (15-Jan-2018)
Product Range: CUS350M Series
No. of Outputs: 1 Output
Input Voltage VAC: 85V AC to 265V AC
Power Supply Output Type: Fixed
Output Current - Output 1: 9.7A
Output Current - Output 2: -
Output Current - Output 3: -
Output Current - Output 4: -
Output Voltage - Output 1: 36V
Output Voltage - Output 2: -
Output Voltage - Output 3: -
Output Voltage - Output 4: -
Power Supply Applications: ITE & Medical
Power Rating (Forced Cooling): 414W
Power Rating (Convection Cooling): 349.2W

Delivery and price
Units per pack	5
Price	220.54 €
Current stock	10+
Lead time	30 days

Datasheet

CUS350M Series 

## Single Output 350W/420W Medical & ITE Power Supplies 

https://product.tdk.com/en/power/cus-m http://www.emea.lambda.tdk.com/cus350m 

With efficiencies up to 94%, the medical and ITE certified CUS350M is rated at 350W with convection cooling and up to 420W with airflow.  The CUS350M is ideal for applications where audible noise cannot be tolerated, including hospital, dental, broadcast and professional audio equipment. A 5V 0.5A standby output, Power Good signal, 12V 0.3A fan supply and remote on/off are provided as standard on the /F suffix models. 

|**Features**|**Benefits**|
|---|---|
|• 350W Convection Cooled|• Quiet Operation|
|• Up to 420W with Forced Air|• Can Utilize System Airflow|
|• Medical Certifications (2 x MOPP)|• Suitable for B and BF Rated Equipment|
|• Class B Conducted EMI|• Easier System EMC Compliance|
|• 5V Standby Voltage, DC Good Signal, 12V Fan Supply and Remote On/Off|• Provides Flexibility in the System|
|• Compact 7.5 x 3.4 x 1.6” Size|• Space Saving in End Equipment|



## **Model Selector** 

|Model|Voltage|Voltage|Voltage|Adjustment|Adjustment|Max Current|Max Current|Max Current|Max Power|Max Power|Max Current|Max Current|Max Power (W) Ripple Noise|Max Power (W) Ripple Noise|Max Power (W) Ripple Noise|Efficiency (typ)%|Efficiency (typ)%|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||(V)|||Range (V)||(A) Convection|||(W) Convection (A) Forced Air||(W) Convection (A) Forced Air||Forced Air||(mV)|115/230Vac||
|CUS350M-12/F|12|12||11.4 - 12.6||29.0|||348.0|||34.5|414.0||120|91 / 93|91 / 93|
|CUS350M-18/F|18|18||17.1 - 18.9||19.4|||349.2|||23|414||180|91 / 94|91 / 94|
|CUS350M-24/F|24|24||22.8 - 25.2||14.7|||352.8|||17.5|420||240|91 / 94|91 / 94|
|CUS350M-36/F|36|36||34.2  - 37.8||9.7|||349.2|||11.5|414||240|91 / 94|91 / 94|
|CUS350M-48/F|48|48||45.6 - 50.4||7.3|||350.4|||8.7|417.6||480|91 / 94|91 / 94|
|||||||||||||||||||
|**CUS350M-**|**CUS350M-**|||**12**|||||**/**||||**F**|||||
|||||||||||||||||||
||||Output voltage 12, 18, 24, 36, 48||||||||/F<br>Blank|Fan supply and Power Good signal (preferred model)<br>Blank<br>No Fan supply and Power Good signal||Fan supply and Power Good signal (preferred model)<br>No Fan supply and Power Good signal||Fan supply and Power Good signal (preferred model)||



/F Fan supply and Power Good signal (preferred model) Blank No Fan supply and Power Good signal 

CUS350M Series 

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**==> picture [517 x 34] intentionally omitted <==**

## **Specifications** 

|**Specifcations**|**Specifcations**|**Specifcations**|
|---|---|---|
|Model<br>CUS350M|||
|**Input**|||
|Input Voltage Range (Operating)|Vac|85 - 265<br>|
|Nominal Input Voltage Range|Vac|100 - 240 (Note: Safety certifed for 90-264Vac)<br>|
|Input Frequency|Hz|47 - 63 (Note: Safety certifed for 50-60Hz only)<br>|
|DC Input Voltage range|Vdc|120 - 370 (Note: Safety certifed for AC input only)|
|Input Current (115/230Vac)|A|350W; 4/2, 420W; 4.5/2.3|
|Inrush Current at 230Vac (typ)|A|40 (Cold Start)|
|Leakage Current|mA|<0.3|
|Power Factor (115/230Vac)|-|0.99 / 0.95|
|Harmonic Compliance|-|Designed to meet IEC61000-3-2|
|Hold Up Time (typ) at 110/220Vac Input<br>|ms|20 (350W output)|
|Effciency|-|See model selector table|
|Conducted & Radiated EMI|-|EN55011/EN55032-B, FCC Class B, (radiated Class A) 350W output|
|Immunity|-|EN61000-4 and EN60601-1-2:2015 (Ed4). See immunity table|
|Insulation Class|-|Class I|
|Safety Certifcations and Markings|-|IEC/UL/CSA/EN62368-1,  IEC/EN60601-1, ANSI/AAMI ES60601-1, 60950-1, CE Mark and UKCA Mark|



|**Immunity**|**Immunity**|**Immunity**|**Immunity**|**Immunity**|
|---|---|---|---|---|
||||||
|Test|Standard|Test Level|Criteria|Notes|
|ESD|EN61000-4-2|Air ±15kV and contact ±8kV|A|See IEC61000 immunity test report on website|
|Radiated Susceptibility|EN61000-4-3|80M -1GHz: 10V/m<br>1.4 - 2.0GHz: 3V/m<br>2.0 - 2.7GHz: 1V/m|A||
|Electrical Fast Transient Burst|EN61000-4-4|±4kV|A||
|Surge|EN61000-4-5|Normal ±2kV<br>Common  ±4kV|A||
|Conducted Susceptibility|EN61000-4-6|10Vrms|A||
|Magnetic Fields|EN61000-4-8|30A/m|A||
|Voltage Dips|EN61000-4-11|30% 500ms<br>60% 10ms<br>100% 20ms<br>100% 5000ms|B<br>B<br>B<br>B||



CUS350M Series 

2 

**==> picture [516 x 34] intentionally omitted <==**

|**Specifcations**|**Specifcations**|**Specifcations**|
|---|---|---|
|Model<br>CUS350M|||
|**Output**|||
|Output Voltage Adjustment|V|See model selector table|
|Switching Frequency|kHz|PFHC; 90 - 110, LLC; 50 - 180, Aux; 100|
|Line Regulation|%|0.5|
|Load Regulation|%|1|
|External Load Capacitance|uF|12V; 12,000, 18; 9,000, 24; 2,700, 48V; 270|
|Ripple & Noise<br>|-|See model selector table|
|Temperature Coeffcient|%/°C|0.02|
|Minimum Load|-|No minimum load required|
|Overcurrent Protection|%|12V: >38, 18V: > 26, 24V: > 20, 36V: >13, 48V: > 10|
|Overvoltage Protection(2)|-|12V: 13.8-16.2, 18V: 20.7-24.3, 24V: 27.6-32.4, 36V: 41.4-48.6, 48V: 55.2-64.8|
|Remote Sense|-|Yes|
|Remote On/Off|-|Apply voltage to isolated terminals to shut unit down|
|Power Good|-|Isolated transistor, On = Good. Gives >5ms warning of AC power loss|
|Standby Voltage|-|5V 0.5A|
|Fan Supply|-|12V 0.3A|
|Parallel Operation|-|-|
|**Environmental**|||
|Operating Temperature|°C|-20 to + 70 (See derating curves)|
|Humidity (non condensing)|%RH|10 - 95 (Operating and storage)|
|Storage Temperature|°C|-40 to + 85|
|Cooling|-|Convection or forced air (1.5m/s across terminals)|
|Altitude|m|62368-1: 5000, 60601-1: 4000 (operating)|
|Withstand Voltage (For 1 minute)|Vac|Input to Ground: 2,000, (1xMOPP), Input to Output: 4,000 (2xMOPP),<br>Output to Ground: 1,500 (1xMOPP)|
|Isolation Resistance|MΩ|>100 at 25°C, 70%RH Output - Ground 500Vdc|
|Vibration (Non operating)|-|10-55Hz (Sweep for 1min.)<br>19.6m/s2Constant  X,Y,Z 1 hour each|
|Shock (Non operating)|-|Less than 196m/s2, 11ms, ±X, ±Y, ±Z 3 times each|
|**Other**|||
|Weight (Typ)|g|850|
|Size (WxLxH)|mm|190 x 87 x 40|
|Size (WxLxH)|Inches|7.5 x 3.4 x 1.6|
|Connectors|-|Input and output: screw terminal block. Signals: JST connector|
|MTBF (JEITA RCR-9102B)(3)|Hours|108,909|
|Warranty|yrs|3|



Notes See website for detailed specifications, test methods and installation manual 

(1) Derate linearly to 80% load from 115 to 85Vac input (convection); derate linearly to 90% load from 95 to 85Vac (forced air cooling) 

(2) Cycle AC to reset 

(3) Parts count method, Ground Fixed. Note the JEITA RCR-9102B calculation method produces figures significantly lower than Telcordia 

CUS350M Series 

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## **Outline Drawing** 

## **Derating Curve** 

CUS350M Series 

4 

## **TDK-Lambda France SAS** 

Tel: +33 1 60 12 71 65 tlf.fr-powersolutions@tdk.com www.emea.lambda.tdk.com/fr 

## **TDK-Lambda Americas** 

Tel:  +1 800-LAMBDA-4 or 1-800-526-2324 tla.powersolutions@tdk.com www.us.lambda.tdk.com 

## **Italy Sales Office** 

Tel: +39 02 61 29 38 63 tlf.it-powersolutions@tdk.com www.emea.lambda.tdk.com/it 

## **Netherlands** 

## **TDK Electronics do Brasil Ltda** 

Tel: +55 11 3289-9599 sales.br@tdk-electronics.tdk.com www.tdk-electronics.tdk.com/en 

tlf.nl-powersolutions@tdk.com www.emea.lambda.tdk.com/nl 

## **TDK-Lambda Germany GmbH** 

Tel: +49 7841 666 0 tlg.powersolutions@tdk.com www.emea.lambda.tdk.com/de 

## **TDK-Lambda Corporation** 

Tel: +81-3-6778-1113 www.jp.lambda.tdk.com 

## **TDK-Lambda (China) Electronics Co. Ltd.** 

Tel: +86 21 6485-0777 tlc.powersolutions@tdk.com www.lambda.tdk.com.cn 

**Austria Sales Office** 

Tel: +43 2256 655 84 tlg.at-powersolutions@tdk.com www.emea.lambda.tdk.com/at 

## **Switzerland Sales Office** 

Tel: +41 44 850 53 53 tlg.ch-powersolutions@tdk.com www.emea.lambda.tdk.com/ch 

## **Nordic Sales Office** 

## **TDK-Lambda Singapore Pte Ltd.** 

Tel: +65 6251 7211 tls.marketing@tdk.com www.sg.lambda.tdk.com 

## **TDK India Private Limited, Power Supply Division** 

Tel:   +91 80 4039-0660 mathew.philip@tdk.com www.sg.lambda.tdk.com 

Tel: +45 8853 8086 tlg.dk-powersolutions@tdk.com www.emea.lambda.tdk.com/dk 

## **TDK-Lambda UK Ltd.** 

Tel: +44 (0) 12 71 85 66 66 tlu.powersolutions@tdk.com www.emea.lambda.tdk.com/uk 

## **TDK-Lambda Ltd.** 

Tel: +9 723 902 4333 tli.powersolutions@tdk.com www.emea.lambda.tdk.com/il-en 

For Additional Information, please visit https://product.tdk.com/en/power/ 

CUS350M_260859 March 14th, 2024 V3 

CUS350M Series 

5

Updated at April 27, 2026

TDK-Lambda is globally recognized as a premier manufacturer of highly reliable power supply solutions and power management equipment. With a strong engineering heritage, the company is a trusted partner for mission-critical applications across the industrial, medical, telecommunications, and test and measurement sectors, delivering components that meet stringent international performance and safety standards. Our extensive portfolio of TDK-Lambda products is heavily focused on comprehensive power and line protection, highlighted by a vast selection of industry-leading AC/DC converters. Engineered to deliver exceptional efficiency and stable performance in demanding environments, these power supplies form the backbone of our offering and are built to support the rigorous power demands of modern electronic infrastructure. To complement these primary power solutions, we also offer a targeted range of high-performance DC/DC converters designed for precise, board-level voltage regulation. Furthermore, to ensure the optimal performance and longevity of these power systems, our catalog includes specialized cooling and thermal management components, such as natural convection heat sinks, providing complete thermal stability for your most critical designs.

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