Front-mounted auxiliary switch for 3RT2 / 3RH2
The 3RH2911-1HA01-ZW97: This is a front-mounted auxiliary switch block designed to snap onto Siemens 3RT2 contactors and 3RH2 contactor relays — no tools, no DIN-rail space consumed beyond the base device footprint. The block carries one normally-closed (NC) contact, wired via screw-type terminals accepting 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) solid/stranded conductors, or 2x (20...16) / 2x (18...14) AWG. Rated 10 A maximum, with AC-15 current values spanning 10 A at 24 V down to 0.26 A at 600 V (–) and DC-13 ratings from 6 A at 24 V to 0.3 A at 220 V (–) — so the same block handles both control-circuit and low-power load switching across a wide voltage range. Mechanical service life is 10 million switching cycles typical; contact reliability is rated at 1 faulty switching per 100 million operations at 17 V, 1 mA, so it's suited for high-cycle PLC input sensing or valve pilot duty where contact weld risk must be minimised.
Sourcing and lifecycle — active, no replacement needed
This is the current production part, not a legacy or NRND item. The block is part of the Siemens SIRIUS family and carries IP20 front protection with a rated impulse withstand of 6 kV and insulation voltage of 690 V AC at pollution degree 3. Sourced and quoted to order against your BOM quantity through independent distribution — availability and current pricing confirmed at RFQ time.