Siemens 5ST3020 1NO+1NC Auxiliary Switch
The Siemens 5ST3020 auxiliary switch offers dual 1NO+1NC contacts for precise fault signalling in MCBs, RCBOs and RCDs. Its slim 0.5‑module footprint fits confined panels while reliably alerting to overload or short‑circuit conditions.
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tameson.co.uk
Siemens 5ST3020 Auxiliary Fault Signal Contact NO/NC - 5ST3020
tameson.co.uk
26-05-2026 03:20:02
Eibmarkt.com 
Conrad Electronic 
