MEAN WELL IRM-45-12ST 45 W 12 VDC Encapsulated PCB Mount AC/DC Power Supply

Embedded systems engineers and IoT device manufacturers often need a compact, reliable power source that can be soldered directly onto a PCB. The MEAN WELL IRM-45-12ST delivers 45 W of stable 12 VDC output from a universal AC input, all within a fully encapsulated plastic case that measures just 87 x 52 x 30 mm. Its through-hole mounting style makes it ideal for automated assembly lines, while the built-in protections ensure long-term operation in demanding environments.

Key specifications

• Output: 12 VDC, 3.75 A, 45 W maximum
• Input: 85–305 VAC (120–430 VDC)
• Efficiency: up to 90%
• Mounting: PCB through-hole, encapsulated plastic case
• Protections: short circuit, overload, over voltage
• Operating temperature: -30°C to +70°C (free air convection)
• Isolation: 3 kVAC input to output
• Safety: UL62368-1, TUV EN62368-1, CE, EAC TP TC 004
• No-load power consumption: <0.1 W
• MTBF: >1,000,000 hours

Why choose it

This power supply eliminates the need for external adapters in space-constrained designs. The wide input range accepts both industrial AC mains and high-voltage DC, making it suitable for global deployment. Its encapsulated construction protects against dust, moisture, and vibration, while the low no-load consumption helps meet energy-efficiency regulations. The IRM-45-12ST is a drop-in solution for applications requiring a compact, board-mounted power source with proven reliability.

Ideal use cases

• Industrial control systems and automation equipment
• IoT gateways, sensors, and smart home devices
• Test and measurement instruments
• Telecommunication and networking hardware
• LED lighting and signage

Good to know

The IRM-45-12ST is part of MEAN WELL's IRM-45 series, known for its high power density and compliance with harmonic current standards (EN61000-3-2 Class A). It operates silently without a fan, relying on free air convection for cooling. For PCB layout, ensure adequate clearance around the module to allow heat dissipation. The unit is RoHS compliant and comes with a 3-year manufacturer warranty.