Sicherung 170M40 is a compact protective device that interrupts overloads and fault currents to protect electrical circuits. It is part of the 170M40 family and supports related options 0M4067 and 0M4167. The assembly includes 0M42 (170M4067) for flexible installation. Key benefits Fast fault interruption protects equipment and wiring from damage and reduces downtime. Clear compatibility with the 170M40 family and related parts simplifies upgrades and spares planning. Durable housing and high‑quality internal components deliver reliable service over time. Compact footprint fits standard enclosures and panels, making installation and replacement quick and simple. Consistent performance under normal operating conditions gives predictable protection for circuits and devices. Main features Function: Overload and fault current protection for branch circuits and control circuits. Compatibility: Part of the 170M40 family; supports 0M4067 and 0M4167 options. Assembly includes 0M42 (170M4067). Size: Compact form factor designed to fit standard panels and enclosures for space-efficient installation. Material and construction: Durable housing with quality internal components to support long service life. Performance: Designed to interrupt fault currents quickly and operate consistently in typical usage. Practical applications Residential electrical panels: Protects branch circuits and connected appliances from overloads and short circuits. Industrial control cabinets: Safeguards motors, drives, sensors, and control equipment against fault currents. Retrofits and upgrades: Drop-in replacement or upgrade for equipment that uses the 170M40 family and related parts. Installation and maintenance Designed for easy installation and replacement in standard enclosures. Inclusion of 0M42 (170M4067) in the assembly supports flexible mounting and configuration when using 0M4067 or 0M4167. Sicherung 170M40 provides straightforward, reliable circuit protection with clear compatibility across the 170M40 product family and related options.