High-quality fire protection switch (arc fault protection device) with residual current circuit breaker/circuit breaker combination, independent of mains voltage, contact position indicator red - green, terminal rear plug protection, tristable locking slide - enables removal from an existing busbar assembly, extensive range of accessories can be retrofitted, large selection of rated residual currents, rated currents up to 40 A, tripping characteristics B, C, D, rated switching capacity 10 kA, suitable for use outdoors (construction site power and outdoor distribution) down to -25 °C