CUS250LD-24
AC/DC Open Frame Power Supply (PSU), ITE, 1 Output, 252 W, 85V AC to 265V AC, Adjustable, Fixed
- Manufacturer: TDK-LAMBDA
- Product type: AC / DC Open Frame Power Supplies
- No. of Outputs:1 Output; Power Rating (Covection Cooling):252W; Power Rating (Forced Cooling):-; Input Voltage VAC:85V AC to 265V AC; Power Supply Output Type:Adjustable, Fixed; Outpu
- SVHC: Lead (17-Jan-2023)
- Product Range: CUS250LD Series
- No. of Outputs: 1 Output
- Output Power Max: 252W
- Input Voltage VAC: 85V AC to 265V AC
- Input Voltage AC Max: 265V
- Input Voltage AC Min: 85V
- Power Supply Output Type: Adjustable, Fixed
- Output Current - Output 1: 10.5A
- Output Current - Output 2: -
- Output Current - Output 3: -
- Output Current - Output 4: -
- Output Voltage - Output 1: 24VDC
- Output Voltage - Output 2: -
- Output Voltage - Output 3: -
- Output Voltage - Output 4: -
- Power Supply Applications: ITE
- Power Rating (Forced Cooling): -
- Power Rating (Convection Cooling): 252W
| Delivery and price | |
|---|---|
| Units per pack | 10 |
| Price | 117.14 € |
| Current stock | 10+ |
| Lead time | 30 days |
**CUS250LD Series** **www.** uk.tdk-lambda.com/cus ## **Single Output 250W Low Profile Power Supplies** |**Features**|**Benefits**| |---|---| |• High efficiency up to 90%|• Compact convection cooled device| |• 30mm high|• Slim design for use in panels| |• Wide range AC input|• Allows global use| |• Convection cooled|• No fan noise| |• High grade component selection|• 3 year warranty| |**Specification**||| |---|---|---| |**Model**||**CUS250LD**| |AC Input Voltage (3)|VAC|85 - 265VAC (300VAC for 5s)| |Input Frequency|Hz|47 - 63Hz| |DC Input Voltage|VDC|120 - 370VDC (No safety certification)| |Inrush Current (cold start)|A|20A at 115VAC, 40A at 230VAC| |Power Factor (1)|-|Meets EN61000-3-2 (Typical PF 0.98/0.95)| |Input Current (115/230VAC)|A|2.8 / 1.4| |Temperature Coefficient|-|<0.02%/°C| |Overcurrent Protection|-|> 105%| |Overvoltage Protection (2)|V|3.3V: 4 - 5.25V, 4.2V: 5 - 6.5V, 5V: 5.75 - 7.5V, 12V: 13.8 - 16.2V, 24V: 27.6 - 32.4V| |Hold Up Time|ms|20ms| |Leakage Current (240VAC 60Hz)|mA|<0.75mA| |Remote Sense|-|No| |LED Indicator|-|Green LED = On| |Operating Temperature (3)|°C|-25°C to +70°C. Derate down to 50% load from +40°C to +70°C| |Storage Temperature|°C|-30°C to +75°C| |Operating Humidity (non condensing)|%|30 - 90% RH| |Storage Humidity (non condensing)|%|10 - 90% RH| |Cooling|-|Convection| |Withstand Voltage|-|Input to Ground 2kVAC, Input to Output 3kVAC, Output to Ground 500VAC for 1 min.| |Isolation Resistance|-|>100M at 25°C & 70%RH, Output to Ground 500VDC| |Vibration (non operating)|-|10 - 55Hz: 19.6m/s2constant sweep 1 min X, Y, Z for 1 hour| |Shock|-|< 196.1 m/s2(20G)| |Immunity|-|IEC61000-4-2 (lv 2, 3), -3 (lv3), -4 (lv 3), -5 (lv3, 4), -6 (lv 3), -8 (lv 4), -11| |Safety Agency Certifications|-|IEC/UL/CSA/EN62368-1, 60950-1 (cTUVus), CE Mark| |Conducted & Radiated EMI|-|EN55022-B, FCC--B| |Weight (Typ)|g|700| |Size (LxWxH)|mm|198 x 102 x 30| |Warranty|yrs|3| ## **Notes:** (1) 115 / 230VAC input (2) Cycle AC to reset (3) See derating curves on page 3. Output derating vs input voltage - derate linearly to 80% load from 115VAC to 85VAC input **(not for CUS250LD-3** ) CUS250LD Series 1 ## **Model Selector** |**Model**|**Voltage**|**Adjust**<br>**Range**<br>**(V)**|**Max**<br>**Current**<br>**(A)**|**Max**<br>**Power**<br>**(W)**|**Load**<br>**Reg**<br>**(mV)**|**Line**<br>**Reg**<br>**(mV)**|**Ripple**<br>**Noise**<br>**(mV)**|**Efficiency**<br>**(typ) %(1)**| |---|---|---|---|---|---|---|---|---| |CUS250LD-3|3.3V|2.97 - 3.63|50|165|40|20|120|86 / 88| |CUS250LD-4|4.2V|3.78 - 4.62|50|210|40|20|120|87 / 89| |CUS250LD-5|5V|4.5 - 5.5|50|250|40|20|120|88 / 90| |CUS250LD-12|12V|10.8 - 13.2|21|252|96|48|120|88 / 90| |CUS250LD-24|24V|21.6 - 26.4|10.5|252|192|96|150|88 / 90| ## **Outline Drawing CUS250LD Series** CUS250LD Series 2 **==> picture [362 x 502] intentionally omitted <==** **----- Start of picture text -----**<br> Output Derating Curve CUS250LD<br>OUTPUT Output Derating vs Ambient Temperature DERATING VS AMBIENT TEMPERATURE<br>100 : : : + : , Pee<br>0 a<br>_ : : : : : ; : :<br>S : : : : : : :<br>ra | alah talathatal daletalatale- latehatalale alelatatatel talslalalale- datalalatele-ghatalalatel taletetalalar-<br>ST 4O bende e ee ee bene eee p eee de eee bee eee eb ee eee eee ee tence<br>20 [en den renee ecb eee dee ede c eee pee eee dee eee gece<br>0 : : : : : : ;<br>-25-20 -10 0 10 20 30 40 50<br>Ta(°C) Ta (˚C)<br> Output Derating vs Input Voltage<br>OUTPUT DERATING VS INPUT VOLTAGE<br>™ -CUS250LD-3 , :CUS250LD-4, 5, 12, 24<br>3 ; ; ; ; ; :<br>Cy GO bene ternn see nnew nnn mnenennng angen ne Gran<br>< : : : : : : ; : ; :<br>ie) : : : : : : : : ; :<br>a ee ae es ee a ee a es as<br>0 : : : : : : : ; :<br>85 100 115 130 145 160 175 190 205 220 235<br>Vin (V) Vin (V)<br>Load (%)<br>Load (%)<br>**----- End of picture text -----**<br> CUS250LD Series 3 ## **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/ CUS250LD Oct20 v6 CUS250LD Series 4
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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