Key Parameters:
Rated Operational Current (Iₑ): 25 A (fixed or adjustable, depending on configuration).

Setting Range for Overload Protection: Typically 12.5–25 A (adjustable via rotary dial).

Short-Circuit Protection (Magnetic Trip):

Trip Threshold: ~12 × Iₑ (e.g., ~300 A for 25 A setting).

Rated Insulation Voltage (Ui): 690 V AC.

Rated Operational Voltage (Ue): 400 V AC (50/60 Hz).

Breaking Capacity (Icn): 50 kA (at 400 V AC, per IEC 60947-2).

Utilization Category: AC-3 (squirrel-cage motors), AC-1 (general resistive loads).

Mechanical Life: ≥ 100,000 cycles.

Electrical Life: ≥ 10,000 cycles (AC-3).

Protection Degree: IP20 (finger-safe terminal protection).

Terminals: Screw-type, suitable for solid or stranded wires (max 35 mm²).

Standards Compliance:

IEC/EN 60947-1, -2, -4-1 (circuit breakers & motor starters).

UL 60947-4-1 (UL listed for North America).

Features:
Integrated overload & short-circuit protection (no need for separate fuses).

Manual ON/OFF switching with rotary handle.

Trip-free mechanism (ensures safety even if held in "ON" position during a fault).

Clear trip indication (visual flag for fault detection).

Compatible with Siemens contactors for modular motor starter assemblies.

Typical Applications:
Protection of three-phase motors (pumps, fans, conveyors).

Machine tool systems, HVAC equipment, and industrial automation.