Over 15 years experience of providing support of MEAN WELL Power Supplies
Mean Well SCWN03B-12 DC-DC Converter - 3W 18~36V 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 Voltage18V~36V
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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 SCWN03B-12 for 12V sensors or control modules in automation equipment?
Yes, if the 12V load stays within 0.25A and the total power stays within 3W. This model provides constant-voltage 12V output and is specified for an 18-36VAC input range.
Is the SCWN03B-12 suitable for compact 12V embedded or industrial interface boards?
It is suitable for compact 12V electronics that need regulated constant voltage at up to 0.25A. The housing size is 31.8 × 20.3 × 10.2 mm, which supports tight-space equipment designs.
Can this converter support a 12V alarm, signaling, or relay control circuit?
It can support 12V signaling or relay-related electronics when the demand remains within 0.25A and 3W. The input side must also match the specified 18-36VAC range.
What is the difference between the SCWN03B-12 and the other SCWN03B models?
The SCWN03B-12 is the 12V version and is rated at 0.25A and 3W. Other models in the series are SCWN03B-03 at 3.3V and 0.6A, SCWN03B-05 at 5V and 0.6A, and SCWN03B-15 at 15V and 0.2A; all are 3W converters.
Is the SCWN03B-12 intended for outdoor use or only controlled environments?
The temperature specification is -40°C to +90°C, which covers a wide operating range. An IP rating is not listed in the provided specs, so weather exposure or sealed outdoor use is not specified.
