It snaps onto 3RT2 power contactors and 3RH2 contactor relays, expanding the control circuit without extra wiring space on the DIN rail. The contact arrangement is laid out as 1 NO, 1 NC, 1 NC, 1 NO across four current paths, giving you two independent changeover pairs. With a mechanical life of 10 million switching cycles and contact reliability of 1 fault per 100 million operations at 17 V / 1 mA, this block is built for high-cycle auxiliary circuits where signal integrity matters.
The thermal continuous current is 10 A, but the switching capacity depends on voltage and duty. At 24 V DC the rated operational current is 10 A; at 60 V DC it drops to 4.7 A; at 110 V DC it's 3 A; at 220 V DC it's 1.2 A; at 440 V DC it's 0.5 A; and at 600 V DC it's 0.26 A. For AC-15 inductive loads at 690 V the rating is 1 A. These numbers govern whether the contacts will hold up under your specific coil or pilot-duty load — don't size by the 10 A blanket figure alone.
Snap-on mounting directly onto the front of 3RT2 contactors or 3RH2 contactor relays — no DIN-rail space consumed. The screw-type terminals accept two conductors per clamp: 2x (0.5 to 1.5 mm²) with core-end processing, or 2x (0.75 to 2.5 mm²). AWG equivalents are 2x (20 to 16) and 2x (18 to 14). Dimensions are 36 mm wide, 37.5 mm high, and 43.7 mm deep — compact enough to fit inside a shallow enclosure without protruding past the contactor profile.