Siemens 5SV4742-0 SENTRON RCCB — 4-pole, 25 A, 500 mA trip
The I²t let-through is rated at 58 000 A²·s, and the peak let-through current is 5 200 kA — both figures the downstream equipment's withstand capability must exceed for selective coordination. The depth is 70 mm, same as the installation depth — no extra clearance needed behind the rail. Overvoltage category III, silicon-free construction. Operating frequency is 50 Hz only.
Four modular width units at 72 mm wide; the 70 mm depth means it sits flush with most DIN-rail mounted MCBs in the same enclosure. Spring-cage or screw terminals accept standard copper conductors — verify terminal type on the nameplate before terminating. Supply top or bottom, no polarity concern on an RCCB. The test button requires a minimum 100 V to operate the test circuit. No short-time delay means it trips instantaneously on residual current exceeding 500 mA — use a selective (S-type) RCCB upstream if you need coordination with downstream devices.