The 3RT1526-1AV60: The S0 frame (85 mm high, 61 mm wide, 91 mm deep) is a compact footprint — fits tight enclosures and leaves room for aux contact blocks alongside. The main circuit withstands 6 kV impulse voltage, and the auxiliary circuit matches that at 6 kV, so it coordinates with standard industrial isolation requirements. Both NO and NC auxiliary contacts are rated 25 A, which is generous for signaling and small loads — you can drive a pilot light or PLC input directly without an interposing relay. The AC-12 operating current maxes at 10 A, covering most control-circuit switching. Screw terminals accept 2x 0.5–1.5 mm² solid or 2x 0.75–2.5 mm² stranded, up to 2x 4 mm² max — common panel wire sizes, no special ferrules needed.
Mounting and Environment — What You Need to Know
Side-by-side mounting is allowed with no derating gap, which saves rail space in multi-contactor groups. Altitude limit is 2000 m without derating; above that, expect a current reduction.