MRX Series Reed Relay

The MRX Series is a rugged, intrinsically safe reed relay designed for hazardous environments requiring galvanic isolation between intrinsic and non-intrinsic safety circuits. Certified under ATEX (KIWA 19ATEX0051 U) and IECEx (KIWA 19.0026U) standards, the MRX Series is approved for use in Zone 0 gas and vaporous atmospheres, making it ideal for mining, chemical processing, and industrial automation.

Engineered for reliability in extreme conditions, the MRX Series operates across a wide temperature range of –40°C to +85°C, and supports peak voltages up to 375 VDC with power ratings up to 50 W. It is available in multiple contact configurations including SPST-NO (1A), SPDT (1C), DPST-NO (2A), DPDT (2C), and 4PST-NO (4A). Through-hole mounting ensures secure integration, while optional diode protection and high-isolation variants enhance safety and performance.

Type of protection: II (1) G [Ex ia Ga] IIC
In accordance with: EN 60079-0 : 2018, EN 60079-11 : 2012

Standards and Certifications

• ATEX & IECEx certified for intrinsically safe applications
• Peak switching voltage up to 375 VDC, rated power up to 50 W
• Wide operating temperature range: –40°C to +85°C
• Contact configurations: 1A, 1C, 2A, 2C, 4A
• Coil voltage options: 5 VDC, 12 VDC, and 24 VDC
• Mounting type: Through-hole (THT)
• Optional diode protection for coil suppression
• High insulation and creepage distance for low leakage current
• Designed for galvanic separation in hazardous zones
• Type of protection: II (1) G [Ex ia Ga] IIC

• Mining & Chemical Industry: Intrinsically safe switching in explosive atmospheres
• Process Automation: Reliable relay control in hazardous zones
• Test & Measurement (ATE): High-voltage isolation in precision test systems
• Refineries & Petrochemical Plants: Safe signal routing in flammable environments
• Industrial Controls: Galvanic isolation in safety-critical systems