DEHN 920301 BXT BAS EX Base Part for BLITZDUCTOR XT Surge Protection Module

Intrinsically safe circuits in hazardous areas demand surge protection that does not compromise the explosion protection concept. The DEHN 920301 BXT BAS EX base part provides a secure, DIN-rail-mountable foundation for plug-in BLITZDUCTOR XT surge protection modules in Ex ia/ib IIC T4 Ga/Gb applications. Without a reliable base, even the best protection module cannot function correctly—this base ensures mechanical stability, safe electrical connections, and compliance with the relevant standards.

Who is it for

This base part is for engineers and system integrators who design and maintain instrumentation and control systems in potentially explosive atmospheres, such as in chemical plants, refineries, and gas processing facilities. It is intended for use with intrinsically safe circuits where a plug-in surge protection module must be mounted on a 35 mm DIN rail and connected via screw terminals.

Main features

• Designed for BLITZDUCTOR XT plug-in surge protection modules
• 2-pole base for one signal pair
• Screw terminals with 0.2–4 mm² (solid) and 0.2–2.5 mm² (stranded) cross-sections
• Stripping length 8 mm, tightening torque 0.5 Nm
• Housing made of grey polyamide PA 6.6
• Operating and storage temperature range: -40 °C to +80 °C
• Protection degree IP20 with module inserted
• Complies with IEC 61643-21, EN 61643-21, EN 60079-0, EN 60079-11

Tips

Ensure the base part is installed on a clean DIN rail and that the screw terminals are tightened to the specified torque. The plug-in module should be inserted only after wiring is complete. For maintenance, the module can be replaced without removing the base or disconnecting the wiring.