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Mean Well DCWN03B-12 DC-DC Converter - 3W 18~36V DC in 12V out
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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SeriesDCWN Series
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Power Rating3 Watt
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Output Voltage12 Volt
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Rated Current0.12 Ampere
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Input Voltage18V~36V
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No of Output1
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Dimming ControlNone
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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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Length1.25 in
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Width0.8 in
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Height0.4 in
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Weight0.03 lb
File Downloads
File Downloads
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Payment & Security
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Frequently Asked Questions
What is the DCWN03B-12 typically used for?
The Mean Well DCWN03B-12 is typically used for isolated low-power DC-DC conversion from an 18-36V DC source to a regulated 12V output. With 3W rated power and 0.125A output current, it fits compact auxiliary and control circuits that need isolated 12V power.
Is the DCWN03B-12 a good fit for 18-36V input systems that need 12V output?
Yes. The DCWN03B-12 is intended for 18-36V input and 12V output service, provided the load stays within the unit's 3W and 0.125A output capacity.
Can the DCWN03B-12 be used in isolated low-power support circuits?
Yes. The converter includes 3KVDC I/O isolation, no minimum load requirement, and a compact DIP24 package, making it suitable for isolated auxiliary 12V rails in small electronic systems.
Is the DCWN03B-12 suitable for broad operating temperatures?
It is rated for -40°C to +90°C working temperature, which makes it suitable for demanding protected electronic environments. It should still be used inside equipment or enclosure-protected systems.
How does the DCWN03B-12 compare with other DCWN03 12V variants?
The DCWN03B-12 provides 3W at 12V from an 18-36V input range. The A, C, and E variants provide the same general 12V output class but with 9-18V, 36-72V, and 4.5-9V input ranges respectively. The main difference is the source-side voltage window.
