CUS500M1-32

AC/DC Open Frame Power Supply (PSU), ITE & Medical, 1 Output, 502.4W, 300.8 W, 85V AC to 265V AC

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.

Manufacturer: TDK-LAMBDA
Product type: AC / DC Open Frame Power Supplies
SVHC: No SVHC (15-Jan-2018)
Product Range: CUS500M1 Series
No. of Outputs: 1 Output
Input Voltage VAC: 85V AC to 265V AC
Power Supply Output Type: Fixed
Output Current - Output 1: 9.4A
Output Current - Output 2: -
Output Current - Output 3: -
Output Current - Output 4: -
Output Voltage - Output 1: 32VDC
Output Voltage - Output 2: -
Output Voltage - Output 3: -
Output Voltage - Output 4: -
Power Supply Applications: ITE & Medical
Power Rating (Forced Cooling): 502.4W
Power Rating (Convection Cooling): 300.8W

Delivery and price
Units per pack	1
Price	109.83 €
Current stock	10+
Lead time	30 days

Datasheet

CUS500M1 Series 

## 3 x 5” 500W AC-DC Power Supplies 

https://product.tdk.com/en/power/cus-m www.emea.lambda.tdk.com/cus500m 

The compact CUS500M1 is packaged in the industry standard 3x5” footprint and can deliver 500W when forced air cooled or 300W convection cooled with a 500W peak. Certified to Medical & ITE safety standards, the CUS500M1 can used in both Class I & Class II (no ground wire) applications(1).  An enclosed model (/EF suffix) is available with an internal fan. 

|**Features**|**Benefits**|
|---|---|
|• 300W (500W Peak) Convection Cooled|• Quiet Operation|
|• 500W with Forced Air|• Can Utilize System Airflow or Integrated Fan|
|• Medical Certifications (2 x MOPP)|• Suitable for B and BF Type Medical Equipment|
|• Class B Conducted and Radiated EMI|• Easier System EMC Compliance|
|• Suitable for Class I and Class II installations(1)|• Flexible Utilization|
|• Compact 3 x 5 x 1.46” Size|• Space Saving in End Equipment|
|• Enclosure and end fan models|• Versatile Application|



|**Model Selector**|**Model Selector**|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
||Nominal|Output|Maximum||Maximum|||Peak|Maximum||Maximum|
|Model|Output|Adjustment|Current||Current|||Current|Power||Power|
||Voltage (V)|(V)|Convection (A)||Forced Air (A)|||(A)|Convection (W)||Forced Air (W)|
|CUS500M1-12|12|None|25.0||41.7|||41.7|300||500.4|
|CUS500M1-19|19|None|15.8||26.4|||26.4|300.2||501.6|
|CUS500M1-24|24|None|12.5||20.9|||20.9|300||501.6|
|CUS500M1-28|28|None|10.7||17.9|||17.9|299.6||501.2|
|CUS500M1-32|32|None|9.4||15.7|||15.7|300.8||502.4|
|CUS500M1-36|36|None|8.3||13.9|||13.9|298.8||500.4|
|CUS500M1-48|48|None|6.3||10.5|||10.5|302.4||504.0|
|||||||||||||
|**CUS500M1-**|||**12**||||**/**|**/**|**EF**|||
|||||||||||||
||||Output voltage 12, 19, 24, 28, 32, 36, 48|||||blank<br>/EF|Open frame construction<br>Enclosed with end fan (exhaust air)|||



Other options are available, please contact sales 

CUS500M1 Series 

1 

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

|**Specifcations**|**Specifcations**|**Specifcations**|
|---|---|---|
|Model<br>CUS500M1|||
|**Input**|||
|Input Voltage range|Vac|85 - 265 (See derating curves)|
|Input Frequency|Hz|47 - 63|
|Input Current (110/230Vac)|A|< 5.0 / 2.5 (500W)|
|Inrush Current at 230Vac (typ) (Cold Start)|A|<50|
|Leakage Current|uA|<200 at 265Vac 60Hz|
|Touch Current (Enclosure Leakage)|uA|<100|
|Power Factor (115/230Vac)|-|0.99 / 0.94|
|Harmonic Compliance|-|Meets IEC61000-3-2 Class A|
|No Load Power Consumption|W|-|
|Hold Up Time (typ) at 115Vac Input<br>|ms|22 at 300W load, 14 at 500W load|
|Effciency|%|Up to 96|
|Conducted & Radiated EMI (Class I only(1))|<br>-|EN55032/EN55011-B (See installation / instruction manual for conditions)|
|Immunity (Class I only(1))|-|Compliant with EN60601-1-2;2015 (Ed4), see immunity table|
|Insulation Class<br>|-|Construction suitable for Class I or Class II installation(1)|
|Safety Agency Certifcations|-|IEC/EN/UL62368-1 and 60601-1, ES60601-1, CE Mark (LVD, EMC and RoHS)|



Note: (1) Class II operation may require additional EMC filtering, contact factory for assistance. 

## **Immunity** 

|**Immunity**|**Immunity**|**Immunity**|**Immunity**|**Immunity**|
|---|---|---|---|---|
||||||
|Test|Standard|Test Level|Criteria|Notes(1)|
|ESD|EN61000-4-2|4|A|-<br>|
|Radiated Susceptibility|EN61000-4-3|3|A|Includes proximity feld requirements of EN60601-1-2:2015|
|Electrical Fast Transient Burst|EN61000-4-4|4|A|(AC Port, 5kHz and 100kHz)|
|Surge|EN61000-4-5|3|A|-|
|Conducted Susceptibility<br>|EN61000-4-6|3|A|-|
|Magnetic felds|EN61000-4-8|4|A|-|
|Voltage Dips and<br>Input Interuptions|EN61000-4-11<br>Class 3 Industrial,<br>incl EN55024<br>(100Vac)|0% for 1/2 cycle<br>0% for 1 cycle<br>40% for 10/12 cycles<br>70% for 25/30 cycles<br>80% for 250/300 cycles<br>0% for 250/300 cycles|A<br>A/B<br>A/B<br>A/B<br> <br>A<br>B|-<br>A up to 280W, B above 280W<br>A up to 180W, B above 180W<br>A up to 440W, B above 440W<br>-<br>-|
||EN61000-4-11<br>Class 3 Industrial,<br>incl EN55024<br>(240Vac)|<br>0% for 1/2 cycle<br>0% for 1 cycle<br>40% for 10/12 cycles<br>70% for 25/30 cycles<br>80% for 250/300 cycles<br>0% for 250/300 cycles|A<br>A/B<br>A/B<br>A<br> <br>A<br>B|-<br>A up to 280W, B above 280W<br>-<br>-<br>-<br>-|
||EN60601-1-2:2015<br>(100Vac)|<br>0% for 1/2 cycle<br>0% for 1 cycle<br>70% for 25/30 cycles<br>0% for 250/300 cycles|A<br>A/B<br>A<br>B|Customer to consider essential performance of end equipment<br>A up to 280W, B above 280W<br>A up to 440W, B above 440W<br>-|
||EN60601-1-2:2015<br>(240Vac)|<br>0% for 1/2 cycle<br>0% for 1 cycle<br>70% for 25/30 cycles<br>0% for 250/300 cycles|A<br>A/B<br>A<br>B|Customer to consider essential performance of end equipment<br>A up to 280W, B above 280W<br>-<br>Customer to consider essential performance of end equipment|
|SEMI F47 Line Dip|SEMI F47|-|-|At input voltages > 200Vac|



CUS500M1 Series 

2 

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

|**Specifcations**|**Specifcations**|**Specifcations**|
|---|---|---|
|Model<br>CUS500M1|||
|**Output**|||
|Line Regulation|%|0.5 (85 - 265Vac)|
|Load Regulation|%|1 (0 - 100% load)|
|External Load Capacitance|uF|12-19V: 10,000, 24V: 8,000, 28V: 4,000, 32-36V: 3,000, 48V: 2,500|
|Ripple & Noise<br>|mV|12V: 240, 19V - 28V: 360, 32V - 48V: 480|
|Temperature Coeffcient|%/°C|±0.02|
|Minimum Load|-|No minimum load required|
|Overcurrent Protection|%|>105. Hiccup mode, automatic recovery|
|Overvoltage Protection|V|12V: 13.8-16.2, 19V: 21.8-25.7, 24V: 27.6-32.4, 28V:32.2-37.8, 32V: 36.8-43.2, 36V: 41.4-48.6, 48V: 55.2-64.8<br>Latching (unit shutdown), cycle AC input to reset|
|Overtemperature Protection|-|Latching (unit shutdown), cycle AC input to reset|
|Remote Sense|-|-|
|Remote On/Off|-|-|
|Power Good|-|-|
|Standby Voltage|-|-|
|Parallel Operation|-|Not possible|
|Series Operation|-|Possible, see installation manual|
|**Environmental**|||
|Operating Temperature (-25°C start-up)|°C|-20 to +70, see derating curves below|
|Storage Temperature|°C|-40 to +85|
|Operating Humidity (non condensing)|%RH|10 - 95|
|Cooling|-|Convection cooling or forced air (2.7m/s)|
|Altitude|m|5,000. Operating, transportation and storage|
|Withstand Voltage (For 1 minute)|Vac|Input to Ground 2,000 (1xMOPP), Input to Output 4,000 (2xMOPP),<br>Output to Ground 1500 (1xMOPP)|
|Isolation Resistance|MΩ|>100 at 25°C, 70%RH & 500VDC|
|Vibration (Non Operating)|-|10-55Hz (1 min sweep). Maximum 19.6m/s2, 1 hour each|
|Shock|-|<196m/s2|
|**Other**|||
|Weight (Typ)|g|Open frame: 450, /EF: 790|
|Size (LxWxH)|mm|Open frame: 127 x 76.2 x 37, /EF: 157 x 85 x 42.5|
|Size (LxWxH)|Inches|Open frame: 5 x 3 x 1.46, /EF: 6.18 x 3.35 x 1.67|
|Connectors|-|Input: JST VHR-5N, Output: M4 screws|
|Warranty|yrs|5|



Notes: 

See website for detailed specifications, test methods and installation manual Specification parameters apply at 25°C ambient temperature unless otherwise stated. 

CUS500M1 Series 

3 

## **Mounting Orientation** 

## **Airflow Direction** 

CUS500M1 Series 

4 

## **Convection Cooling CUS500M1** 

**(Additional derating applies below 115Vac input)** 

## **Forced Air Cooling CUS500M1-12 (2.7m/s)** 

## **(Additional derating applies below 115Vac input)** 

CUS500M1 Series 

5 

## **Forced Air Cooling CUS500M1-19 to -48 (2.7m/s)** 

**==> picture [253 x 11] intentionally omitted <==**

**----- Start of picture text -----**<br>
(Additional derating applies below 115Vac input)<br>**----- End of picture text -----**<br>


## **CUS500M1-xx/EF (End Fan)** 

**==> picture [141 x 12] intentionally omitted <==**

**----- Start of picture text -----**<br>
(All models, all conditions)<br>**----- End of picture text -----**<br>


CUS500M1 Series 

6 

## **Derating versus Input Voltage** 

**(All models, all conditions)** 

CUS500M1 Series 

7 

**==> picture [232 x 38] intentionally omitted <==**

**----- Start of picture text -----**<br>
Mechanical Specification<br>Outline Drawing CUS500M1 Open Frame Unit<br>**----- End of picture text -----**<br>


## **Outline Drawings CUS500M1 End Fan** 

CUS500M1 Series 

8 

## **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/ 

CUS500M1_Datasheet_260784 May 23rd, 2024 V4 

CUS500M1 Series 

9

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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