Circuit breaker Spamel ST22-2-sz — single-phase protective switch, model ST22‑2‑sz

Spamel ST22-2-sz is a compact single-phase circuit breaker engineered to provide reliable overload and short-circuit protection for residential and light commercial electrical installations. Designed for installation in distribution boards, this protective switch isolates faulty circuits and ensures safe disconnection of lighting, socket, and small appliance lines. The device combines straightforward functionality with a form factor suitable for standard DIN-rail mounting in single-phase panels.

Advantages

The Spamel ST22-2-sz offers dependable tripping behavior under overload and short-circuit conditions, ensuring prompt interruption of fault currents. Its compact single-pole design saves space in distribution boards while maintaining clear manual switching capability. The construction provides easy integration into existing wiring setups and reliable mechanical reset after fault clearance. Materials and assembly meet common safety expectations for household and light-commercial protective devices.

Suitable for

• Lighting circuits in single-phase residential and small commercial installations
• Socket and outlet circuits for general domestic use
• Protection of small appliances and equipment lines

Key specifications

• Type: single-phase (single-pole) protective switch
• Protection functions: overload and short-circuit interruption
• Mounting: DIN-rail compatible compact housing for distribution boards
• Operation: manual on/off switching with automatic trip on fault
• Application: designed for lighting, socket circuits, and small appliance lines

How to use

Install the Spamel ST22-2-sz in the appropriate position on a distribution board DIN rail according to local electrical codes and wiring diagrams. Connect the line and load conductors to the labeled terminals, ensuring tight and secure connections. Select the breaker’s rated current and coordinate with upstream and downstream protective devices as required by the installation. After wiring, verify correct operation by switching the device on and off and perform an insulation and continuity check before powering the circuit.

Usage recommendations

Use the Spamel ST22-2-sz within its intended current rating and within single-phase circuits only. Coordinate with residual-current devices or upstream protection where additional fault discrimination is required. Periodically inspect terminal tightness and device condition as part of routine maintenance and replace the unit if mechanical damage or persistent malfunction is detected.