The Siemens 3RN1014-1BM00 is a thermistor motor protection relay designed for bimetal sensors, operating on 230 V AC at both 50 Hz and 60 Hz. It provides two CO (changeover) auxiliary contacts and includes a reclosing lockout function, preventing automatic restart after a fault. The relay is housed in a 22.5 mm wide enclosure with IP20 protection, suitable for control panel mounting via screw or snap-on.
Lifecycle and Sourcing
This part is listed as a phased-out product. The preferred successor is the 3RN2010-1BW30, which also provides thermistor motor protection for bimetal sensors with manual/remote reset and 230 V AC supply. For existing BOM lines or maintenance spares, the 3RN1014-1BM00 can be sourced via RFQ — we'll check market availability against your quantity.
Key Ratings and Fit
Rated 230 V AC at 50/60 Hz, the relay draws its control supply from the line voltage — no separate DC supply needed. The two CO contacts handle auxiliary signaling or direct motor starter control. The 22.5 mm width fits standard DIN-rail terminal block spacing; the 91 mm depth leaves room in shallow enclosures. Operating ambient range of -25 to +60 °C covers most industrial cabinet conditions without derating.
Compliance and Approvals
The relay carries IP20 protection (finger-safe when wired) and is marked with a substance prohibitance date of May 28, 2009, indicating RoHS compliance per EU directive. The reference code per IEC 81346-2 is K (relay function). No UL or CSA listings are stated in the available documentation; verify with the factory for specific project requirements.