KEMET SPST Through Hole Reed Switch, 100 mA, 30 V DC, Nickel Iron Alloy, OHD5R-55B

The KEMET OHD5R-55B reed switch is a premium, single pole single throw (SPST) magnetic switch designed for industrial, electronics, and appliance control applications requiring high reliability and precision. It features a through-hole mounting design, making it suitable for secure installation in printed circuit boards or assemblies.

The switch accommodates a maximum switching current of 100 mA and supports up to 30 V DC, enabling reliable low-power signal control. Nickel iron alloy contact material guarantees superior magnetic response and robustness, promoting long service life and stable performance.

The OHD Thermal Guard series incorporates a proprietary ferromagnetic material (Thermorite) that changes its magnetic properties at a designated threshold, providing temperature-dependent switching for overheating protection in a wide range of applications. The magnetic and temperature sensing design allows precise control, especially in atmospheric temperature detection and overheating monitoring circuits for power transistors, modules, heaters, amplifiers, motors, hard disk drives, and more.

Its environmental durability stems from the sealed structure, offering dust, explosion, and corrosion resistance. The device operates consistently over a broad temperature range, from -20°C to 150°C, and its compact dimensions (6.7 mm length, 5 mm width, 19.1 mm depth) ensure ease of handling and integration into limited space settings.

The KEMET OHD5R-55B is RoHS compliant, meeting international standards for hazardous substance restrictions. With minimal contact resistance (300 mΩ), high switching speed, and compatibility with extremely low and high power signals (from 0.1 mW to 6 W as typical for the series), it supports versatile circuit designs and demanding industrial requirements.

Typical use cases include temperature detection in industrial systems, safety shutoff for HVAC, manufacturing, laboratory instruments, electronic appliances, and motor protection circuits.

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