What this MCB delivers on the panel
The Siemens SENTRON 5SJ6320-7KS is a 3-pole miniature circuit breaker rated 20 A with a C tripping characteristic, meaning it handles moderate inrush currents from motor starters or lighting ballasts without nuisance tripping while still protecting downstream wiring. Its 6 kA breaking capacity per EN 60898 and IEC 60947-2 is sufficient for most residential and light commercial distribution boards; at 400 V AC it clears line-to-line faults on three-phase circuits.
Installation depth is 70 mm from the rail face to the back of the terminals; overall depth including the toggle is 76 mm.
Environmental range and material compliance
Rated for ambient temperatures from -40 °C to +75 °C, with periodic exposure up to +55 °C at 95% relative humidity. Touch protection is integral, and the breaker is sealable for tamper-proofing after commissioning.