Technical Information & Details for the MEAN WELL IRM-03-9S Power Supply
- Output Power: 3 W
- Output Voltage: 9 V DC
- Output Current: 333 mA
- Input Voltage Range: 85 – 305 V AC / 120 – 430 V DC, 47 – 63 Hz
- Efficiency: 77 %
- Ripple & Noise: max. 100 mVp-p
- Inrush Current: 10 A @115 VAC / 20 A @230 VAC
- No-load Power Consumption: < 0.075 W
- Operating Temperature: −30 °C to +85 °C
- Cooling: Free air convection
- Protection Functions: Short circuit, Overload, Over voltage
- Overvoltage Category: OVC II
- Isolation Voltage: 4200 V AC (Input to Output)
- Dimensions (L x W x H): 37 mm x 24 mm x 15 mm
- Weight: approx. 23 g
- Safety & EMC Certificates: UL62368-1, EN60335-1, EN61558-1/-2-16, CB, EAC, CE
- Mounting Style: SMD (Surface Mount Device)
- Manufacturer Warranty: 3 years
Information about the MEAN WELL IRM-03-9S
The MEAN WELL IRM-03-9S is a high-precision 3W miniature AC-DC power module specifically designed for surface mount (SMD) assembly on printed circuit boards. Delivering a stable 9V output, this module is an ideal solution for compact industrial controllers and smart sensor networks where traditional through-hole mounting is not preferred. The device is built following a Class II isolation design, meaning it operates safely without a functional ground pin. Its internal circuitry is protected by a flame-retardant phenolic case and encapsulated with high-grade silicone, ensuring efficient thermal management and anti-vibration resistance up to 5G while maintaining a dust-tight seal.
Beyond its mechanical durability, the IRM-03-9S stands out for its superior energy efficiency and ecological compliance. With a no-load power consumption of less than 0.075W, it meets the most demanding global green energy standards, effectively reducing standby power costs in large-scale deployments. The module supports a universal input range of 85 to 305Vac, facilitating worldwide compatibility across various power grids. It also features integrated EMI filtering that complies with BS EN/EN55032 Class B, ensuring that sensitive electronic components nearby are shielded from interference, making it a highly reliable and low-maintenance power source for modern electronic instrumentation.