The Siemens SIRIUS 3RT1916-1LN00-ZX90 is a surge suppressor — specifically an interference suppression diode with an integrated LED indicator — rated for 70 to 150 V DC. It's designed to snap onto S00-size contactors in the SIRIUS family, protecting the coil circuit from voltage spikes when the contactor de-energizes. The LED gives you a quick visual on coil status, handy during panel troubleshooting.

Siemens 3RT1916-1LN00-ZX90 Surge Suppressor, SIRIUS, 70-150
Siemens SIRIUS surge suppressor, interference suppression diode with LED, 70...150 V DC, for mounting onto S00 contactors, multi-unit packaging of 10.
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Frequently asked questions
What is the closest functional replacement for 3RT1916-1LN00-ZX90?
The official successor is the SIRIUS 3RT2 series surge suppressor. It is designed as a direct replacement for the same S00 contactor mounting and DC coil suppression role.
Where can I buy 3RT1916-1LN00-ZX90?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.