Microtherm 52N Series Normally Closed Thermal Switch 225°C

The Microtherm 52N Series Normally Closed Thermal Switch is a 225°C thermal safety switch designed to interrupt electrical circuits in the event of overheating. It automatically opens the circuit when the ambient temperature reaches its precise switching point of 225°C, making it an essential protective device for a wide range of electrical and electronic applications where accurate thermal management is critical for safety and equipment longevity.

Overview

Once activated, the switch resets and closes the circuit again only when the temperature falls back to approximately 175°C. This ensures the system has adequately cooled before operation can resume. The switch is rated for 125 VAC at 15 A and 250 VAC at 10 A, providing compatibility with various control circuits. Its compact, flange-mount sensor housing supports straightforward installation.

Key Features

• Precise thermal protection: activates at 225°C to help prevent damage from overheating.
• Automatic reset: closes again at approximately 175°C once the system has cooled.
• Normally closed operation: the default closed state interrupts power upon overheating.
• Quick-connect sensor terminals: designed for fast, tool-free wiring.
• Flange-mount housing: for secure attachment.
• Compact size: 22 mm x 33 mm x 2 mm, weighing 6 g.

Applications

Ideal for integration into appliances, power supplies, transformers, and industrial equipment, this thermal switch provides overheat protection in space-constrained designs.

Choose the Microtherm 52N Series Normally Closed Thermal Switch when you need a compact 225°C thermal safety switch with a 175°C reset point for electrical and electronic equipment.