SYSTEM SENSOR 5603 Heat Detector, 135F Fixed Temperature, Single-circuit Mechanical

The SYSTEM SENSOR 5603 is a single-circuit mechanical heat detector with a fixed temperature rating of 135ºF. It features easy-to-use terminal screws and a plain housing suitable for residential installations.

This model supports multiple installation configurations and offers versatile mounting options. Compatible back boxes include single gang, 3.5-inch and 4-inch octagonal, and 4-inch square boxes with a square to round plaster ring. The mounting bracket is reversible for flexible placement.

For technical purchases, confirm that SYSTEM SENSOR 5603 Heat Detector, 135F Fixed Temperature, Single-circuit Mechanical 5603, 674109 fits the required application and field conditions.

Confirm the practical fit with the project scope, service conditions, and manufacturer documentation.

This item appears in Smoke and Heat Detection, where buyers can compare related technical products for US projects.

If the product is part of a larger system, check how it interacts with power, control, communication, or mounting components. This approach is useful for commercial, industrial, and low-voltage projects where details for SYSTEM SENSOR 5603 Heat Detector, 135F Fixed Temperature, Single-circuit Mechanical 5603, 674109 matter.