It's a miniature residual current circuit breaker with flame retardant ABS case, which can be used for electric leakage protection of household appliances. It's of high sensitivity, stable performance and good quality, durable to use. DIN rail installation allows convenient assemble and disassemble. Features: Residual current circuit breaker with short circuit, overload and leakage protection. With high sensitivity to provide timely protection. High-quality insulated and flame retardant ABS casing, fine workmanship, with good insulativity and durability, long service life. T-shaped switch for easy operation; anti-crack buckle for assured installation; closed type wiring terminals, firm wiring, rust-proof and durable. DIN rail installation, flexible to use, convenient to assemble and disassemble. Compact size and light weight make installation easier. 4500A breaking capacity, reliable and stable performance. Multi-purpose, suitable for electric circuits of AC 50Hz frequency and below 400V rated voltage. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Rated Current: 6A/ 10A/ 16A/ 20A/ 25A/ 32A/ 40A/ 50A/ 63A (Optional) Frame Size Current: 63A Material: ABS Pole Number: 1P Breaking Capacity: 4500A Release Attachment: Undervoltage Release Release Style: C Release Method: Over-current Release Wiring Method: up, in/ down, out Rated Voltage: 400V Protection Grade: III Installation Method: DIN Rail 3C Rated Voltage Range: 50VVoltage440V Package Size: 5 * 8 * 9.5cm / 1.97 * 3.15 * 3.74in Package Weight: 220g / 7.76oz Package List: 1 * Circuit Breaker