Honeywell 111SM858-H403 Basic Switch Overview
The Honeywell 111SM858-H403 basic switch is part of the MICRO SWITCH SM Series, a compact switch platform developed for applications that need dependable snap-action performance in a small mechanical envelope. In practical engineering terms, this model is relevant when designers need a subminiature switch that can deliver clear contact transfer, stable actuation, and straightforward installation in tightly packaged control systems. The Honeywell 111SM858-H403 basic switch is often associated with equipment where accurate on/off behavior matters just as much as physical space efficiency.
Technical Characteristics of the Honeywell 111SM858-H403 Basic Switch
Published product listings describe the Honeywell 111SM858-H403 basic switch as an SPDT subminiature basic switch rated at 5 A and 250 Vac, with a straight lever actuator and quick connect termination. The part is positioned within the SM Series, which is known for combining small size, light weight, precision operation, and long service life. That matters because many compact control systems depend on predictable mechanical switching rather than simple size reduction alone. A switch like the Honeywell 111SM858-H403 basic switch is typically selected when engineers want a proven snap-action platform that supports reliable integration into brackets, panels, and tightly engineered electromechanical assemblies.
Why This Honeywell Basic Switch Matters in Compact Designs
A straight lever configuration can be especially useful in applications where the actuating component follows a direct mechanical path. Instead of relying on a roller interface, the switch can be triggered through a defined contact point along the lever, which helps designers control travel and response more precisely. That makes the Honeywell 111SM858-H403 basic switch a practical option for equipment builders looking at micro switch replacement, compact snap action switch selection, or precision control hardware.
Another reason this part remains relevant is its place within the broader Honeywell switch ecosystem. Engineers often prefer to stay within one family when they want consistency in size, mounting, and switching behavior across several product variants. For more about Honeywell, reviewing related SM Series models helps clarify how lever style and termination format can shape final switch selection.
FAQ
What type of switch is the Honeywell 111SM858-H403?
It is generally identified as a subminiature SPDT snap-action basic switch in the Honeywell SM Series. That means it supports changeover switching in a compact package designed for repeatable actuation.
What actuator does the Honeywell 111SM858-H403 basic switch use?
This model is commonly listed with a straight lever actuator. That style is often preferred where the moving part approaches the switch in a direct, controlled motion.
Why do engineers search for Honeywell 111SM858-H403 basic switch information?
Most users are checking fit, electrical rating, actuator style, or cross-reference suitability. In many cases, the interest comes from replacement planning or from selecting a compact switch for a new electromechanical design.
What should be verified before specifying this switch?
The most important checks include contact arrangement, mounting compatibility, actuator travel path, and actual electrical load. A switch can be dimensionally similar to another model but still behave differently if the lever geometry or termination style changes.