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Power Supply That Fits in Small Panels

Need a power supply for a small control panel? This 30W model fits in less space, supports easy installation, adjustable output, and built-in protection.

Ultra-slim 2U DIN rail AC/DC now available in 30W
Ultra-slim 2U DIN rail AC/DC now available in 30W

RECOM has expanded its REFIN DIN rail power supply family with the REFIN2U-S30, a 30W power supply designed for applications where installation space is limited. It uses the same 36mm-wide, 2U step-shape design introduced with the earlier 90W REFIN2U-S90 model but targets lower-power systems such as home and building automation.

The REFIN2U-S30 is available with 12VDC and 24VDC output options and delivers up to 30W of continuous power. It accepts a wide AC input range of 85VAC to 305VAC. The output voltage can be adjusted from 10.8VDC to 13.2VDC for the 12V version and from 21.6VDC to 26.4VDC for the 24V version. The power supply reaches efficiency of up to 90% while consuming less than 100mW under no-load conditions.

The compact module measures 36 × 94 × 55mm, making it suitable for flat-panel distribution boards and other installations with limited space. It uses spring-loaded push-in terminals that support both solid and stranded wires, allowing tool-free wiring without ferrules. Rear mounting flaps also let users install the unit directly on a back panel in any orientation, even without a DIN rail.

The power supply is designed for building automation, control panels, industrial control systems, and other low-power applications that require a compact DIN rail power source.

The REFIN2U-S30 provides its full 30W output from -40°C to +55°C and can continue operating at ambient temperatures up to +90°C with output derating. Built-in protection includes short-circuit, over-current, and over-voltage protection with hiccup mode and automatic recovery. Reinforced insulation provides 4kVAC isolation between the input and output. The unit is also rated for overvoltage category (OVC) III operation at altitudes up to 3000m and OVC II operation up to 5000m.

“With the introduction of the REFIN2U-S30, RECOM broadens the REFIN2U portfolio within a common mechanical platform, allowing designers to scale across different power levels while maintaining the same compact 2U form factor and installation concept,” comments Michael Schrutka, MSc, Product Manager AC/DC of RECOM.

Nidhi Agarwal
Nidhi Agarwal
Nidhi Agarwal is a Senior Technology Journalist at Electronics For You, specialising in embedded systems, development boards, and IoT cloud solutions. With a Master’s degree in Signal Processing, she combines strong technical knowledge with hands-on industry experience to deliver clear, insightful, and application-focused content. Nidhi began her career in engineering roles, working as a Product Engineer at Makerdemy, where she gained practical exposure to IoT systems, development platforms, and real-world implementation challenges. She has also worked as an IoT intern and robotics developer, building a solid foundation in hardware-software integration and emerging technologies. Before transitioning fully into technology journalism, she spent several years in academia as an Assistant Professor and Lecturer, teaching electronics and related subjects. This background reflects in her writing, which is structured, easy to understand, and highly educational for both students and professionals. At Electronics For You, Nidhi covers a wide range of topics including embedded development, cloud-connected devices, and next-generation electronics platforms. Her work focuses on simplifying complex technologies while maintaining technical accuracy, helping engineers, developers, and learners stay updated in a rapidly evolving ecosystem.

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