Over 15 years experience of providing support of MEAN WELL Power Supplies
Mean Well SCWN03A-12 DC-DC Converter - 3W 9~18V DC in 12V out
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Description
Description
Features
| DIP24 package with industry-standard pinout |
| 2:1 wide input range |
| Operating temperature range -40~+90°C |
| No minimum load required |
| Comply to BS EN/EN55032 radiated Class A without additional components |
| High efficiency up to 87% |
| Protections: Short circuit(Continuous)/Overload/Input under voltage |
| 3KVDC I/O isolation |
| 3 years warranty |
General Specification
| Voltage set point accuracy | ±1.5% (max.) |
| Line regulation | ±0.5% (max.) |
| Load regulation | Single output models:±0.5%, Dual output models:±1% |
| Overload protection | 120%~250%, auto-recovery |
| Efficiency | 87% (typical) |
| Short circuit protection | Continuous, auto-recovery |
| I/O isolation voltage | I/P-O/P:3KVDC |
| I/O isolation resistance | I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH |
| Isolation capacitance | 250pF (max.) |
| Working temperature | -40~+90°C |
| Storage temperature | -40°C to +105°C |
| EMC | Compliance to EN55032 class A, EN61000-4-2,3,4,5,6,8 |
| Temp. Coefficient | 0.03% / ℃ (0 ~ 85℃) |
| Dimension (LxWxH) (mm) | 31.8*20.3*10.2mm (1.25*0.8*0.4 inch) |
| Case material | Non-conductive black plastic(UL 94V-0 rated) |
Specifications
Specifications
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BrandMean Well
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SeriesSCWN Series
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Power Rating3 Watt
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Output Voltage12 Volt
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Rated Current0.25 Ampere
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Input Voltage9V~18V
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Standards MetCE,EAC
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Operation ModeConstant Voltage
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Operating Temperature-40°C~90°C
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Warranty3 Year
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Length3.18 cm
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Width2.03 cm
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Height1.02 cm
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Weight0.01 kg
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Payment & Security
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Frequently Asked Questions
Can I use the SCWN03A-12 for a 12V sensor or transmitter inside industrial control equipment?
Yes, this model provides a constant 12V output at up to 0.25A with a 3W power rating. It is intended for systems with a 9-18VAC input, so it fits low-power 12V control electronics that stay within those limits.
Is the SCWN03A-12 suitable for 12V embedded boards or small automation modules?
It can be used where the load needs a regulated 12V constant-voltage output and draws no more than 0.25A. The converter is rated 3W and uses a 9-18VAC input range, which suits compact embedded or automation circuits in that range.
Can this converter power a 12V relay or interface circuit in a machine cabinet?
It is appropriate for 12V relay or interface circuits if the total demand stays within 0.25A and 3W. The unit is compact at 31.8 × 20.3 × 10.2 mm, which helps where panel space is limited.
What is the difference between the SCWN03A-12 and other SCWN03A models?
The SCWN03A-12 is the 12V version rated at 0.25A and 3W. In the same series, the SCWN03A-03 is 3.3V at 0.6A, the SCWN03A-05 is 5V at 0.6A, and the SCWN03A-15 is 15V at 0.2A; all are 3W models.
Is the SCWN03A-12 suitable for outdoor or harsh-temperature environments?
The operating temperature range is -40°C to +90°C, so it is specified for very wide temperature conditions. No IP rating is listed in the provided specs, so outdoor exposure or washdown suitability is not specified here.
