Siemens 5SX21-C4 1-Pole Circuit Breaker 230/400V 4Amp

Siemens 5SX21‑C4 miniature circuit breaker designed for protection of electrical circuits against overload and short circuit, suitable for residential and commercial installations with standard load characteristics. Technical specifications: Brand: Siemens Model: 5SX21‑C4 Product type: Miniature circuit breaker (MCB) Number of poles: 1P (single pole) Rated current: 4 A Rated operational voltage: 230/400 V AC Alternative voltage rating: 277 V AC Frequency: 50/60 Hz Trip curve: C curve (magnetic trip typically 5–10× In, for general-purpose loads) Breaking capacity: 6 kA Standard designation: T55 marking (temperature calibration reference) Mounting type: DIN rail (35 mm) Terminal type: Screw terminals (top and bottom connection) Insulation voltage (Ui): Up to 440–500 V Impulse withstand voltage (Uimp): Approx. 4 kV Protection type: Thermal-magnetic Housing material: Flame-retardant thermoplastic Color: White housing with black toggle Degree of protection: IP20 (when installed) Mechanical life: Approx. 20,000 operations Electrical life: Approx. 10,000 operations Application: Lighting circuits, general-purpose outlets, residential and commercial electrical distribution Standards compliance: IEC/EN 60898 Country of manufacture: European Union (typically Germany or Czech Republic)