The Siemens 3RH1911-1MA20-ZW97 is an auxiliary switch block with 2 normally-open contacts, used to signal the position of a main contactor or relay in a control circuit. It mounts directly on the front or side of compatible SIRIUS contactors and relays, adding status feedback for PLC inputs, indicator lamps, or interlocking logic without extra wiring to the main power path.
Siemens 3RH1911-1MA20-ZW97 Auxiliary Switch Block, 2NO
MPN3RH1911-1MA20-ZW97
Siemens auxiliary switch block, 2NO, order code 3RH1911-1MA20-ZW97.
Source DocumentedChannel stated on listing & quote
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Product details
Frequently asked questions
What is the function of this auxiliary switch block?
It provides 2 normally-open auxiliary contacts for signaling the on/off status of the main contactor or relay it mounts to.
MPN
3RH1911-1MA20-ZW97