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Mean Well DCW03B-12 DC-DC Converter - 3W - 18~36V in ±12V out 125mA

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DCW03B-12

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The DCW03B is a 3W Mean Well. power converter.

Key Features

✓ 1KVDC reinforced I/O isolation
✓ Protections: Short circuit / Overload
✓ 3 years warranty

Frequently Asked Questions

What are the key electrical specifications of the Mean Well DCW03B-12?

The DCW03B-12 is a 3W DC-DC converter with an 18 to 36V DC input range and a ±12V DC output. It is rated for 125 mA and has a typical efficiency of 82%. This model is designed for compact low-power conversion where regulated dual output is needed.

What types of applications is the DCW03B-12 suited for?

This model is suited to low-power industrial and embedded applications that need isolated DC-DC conversion from a nominal 24V-class input. Its compact size, built-in EMI filter, and shielded metal case make it a fit for control electronics, instrumentation, and other space-constrained equipment. It is generally chosen where stable ±12V output and basic isolation are important.

Does the DCW03B-12 provide isolation between input and output?

Yes, the DCW03B-12 provides 1000VDC minimum input-to-output isolation. It also specifies 100 MΩ minimum isolation resistance at 500VDC and 80 pF maximum isolation capacitance. These characteristics help support use in systems that need separated input and output power domains.

How does the DCW03B-12 handle overload and short-circuit conditions?

This converter includes overload protection and short-circuit protection with auto-recovery behavior. Overload protection is specified at 160% to 250%, and short-circuit protection is continuous. That makes it better suited for applications where automatic recovery is preferred after fault conditions clear.

What operating environment is the DCW03B-12 designed for?

The DCW03B-12 has a working temperature range of -40°C to +71°C, subject to the output derating curve. Storage temperature is specified from -40°C to +105°C. It is cooled by free air convection and uses a five-sided shield metal case for durability and EMI performance.

What makes the DCW03B-12 different from non-isolated or basic low-cost converters?

Compared with basic non-isolated converters, the DCW03B-12 adds 1000VDC input-to-output isolation, built-in EMI filtering, and a shielded metal case. It is also burn-in tested at full load and backed by a 2-year warranty. Those features make it a stronger fit for industrial and OEM use where reliability matters more than lowest upfront cost.

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Model	Power	Voltage	Current	IP Rating
Mean Well DCW03C-15 DC-DC Converter - 3W - 36~72V in ±15V out	3W	15V	0.1A	—	View
Mean Well DCW03C-12 DC-DC Converter - 3W - 36~72V in ±12V out	3W	12V	0.12A	—	View
Mean Well DCW03C-05 DC-DC Converter - 3W - 36~72V in ±5V out	3W	5V	0.3A	—	View
Mean Well DCW03B-15 DC-DC Converter - 3W - 18~36V in ±15V out	3W	15V	0.1A	—	View
Mean Well DCW03B-05 DC-DC Converter - 3W - 18~36V in ±5V out	3W	5V	0.3A	—	View
Mean Well DCW03A-15 DC-DC Converter - 3W - 9~18V in ±15V out	3W	15V	0.1A	—	View
Mean Well DCW03A-12 DC-DC Converter - 3W - 9~18V in ±12V out	3W	12V	0.12A	—	View
Mean Well DCW03A-05 DC-DC Converter - 3W - 9~18V in ±5V out 300mA	3W	5V	0.3A	Indoor	View

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Mean Well DCW03B-12 DC-DC Converter - 3W - 18~36V in ±12V out 125mA

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Mean Well DCW03B-12 DC-DC Converter - 3W - 18~36V in ±12V out 125mA

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