UTC (Formerly GE Security/ESL) 541NCRXT 4-Wire, Photoelectric Smoke Detector, Heat, Auxiliary Relay

UPC: 046188094752
Also known as: ES-541NCRXT, UTC-541NCRXT

The UTC 541NCRXT is a 4-wire, photoelectric smoke detector equipped with a heat sensor and auxiliary relay. The unit works on the light-scattering principle where a pulsed, infrared, light-emitting diode serves as the light source, and a high-speed photo diode as the sensing element. This design offers superior protection against false/nuisance alarms caused by dust, insects, RF, and ambient light.

A confirmed alarm causes the LED to light continuously. The unit indicates trouble by flashing the LED every second. This meets the NFPA 72 field sensitivity testing requirements.

The 541NCRXT mounts to a standard single-gang electrical box, a 4-inch octagonal box, a 4-inch square electrical box, or WIREMOLD No. 5739 fixture box.


Also known as: ES-541NCRXT, UTC-541NCRXT

Technical Specifications: Color: White head and base Construction: ABS plastic Weight: 9.6 oz. (272 g) Mounting dimensions: 5.25 in. (133 mm) dia.; 0.3 in. (8 mm) high Detector head dimensions: 5.5 in. (140 mm) dia.; 2 in. (50 mm) high Alarm contacts: 500 mA @ 36 VDC (resistive) Auxiliary relay contacts: 1.0 A @ 30 VDC; Form C Typical alarm current (6/12/24 V): up to 60 mA max. if not limited by control panel Typical average standby current: 70 µA Maximum ripple p-p: (6/12/24 V): 10% (V p-p) Power supply: 12/24 V operation, 8.5 to 33 VDC polarity sensitive

For more information about the UTC (Formerly GE Security/ESL) 541NCRXT, please contact us.