Honeywell 111SM247 Basic Switch Technical Insight

The Honeywell 111SM247 basic switch is part of the SM Series and is widely recognized as a compact SPDT snap-action switch built for controlled mechanical actuation. Its published descriptions point to a straight lever format with solder termination, placing it in a category of switches that are frequently used when designers need clear lever travel, reliable contact transfer, and a small installation footprint. The Honeywell 111SM247 basic switch therefore appeals to users who are balancing electrical performance with mechanical precision.

Technical Characteristics of the Honeywell 111SM247 Basic Switch

Distributor and datasheet-based sources describe the Honeywell 111SM247 basic switch as an SPDT model rated at 5 A and 250 V AC, with 30 V DC switching capability also referenced in product listings. It is associated with a straight lever actuator, thru-hole or solder-style termination references, and maximum operating force around 1.95 N. Another recurring specification is the 3.4 mm integral flexible leaf dimension, along with high-temperature construction up to 204 °C and mounting centers of 9.5 mm. Mechanical life is commonly cited at up to 10,000,000 cycles, which is a strong indicator of long-term suitability in repetitive motion systems.

What Makes This Honeywell Basic Switch Practical

One of the reasons engineers consider the Honeywell 111SM247 basic switch is that it offers a straightforward lever interface without moving to a larger switch body. This makes it valuable in devices where actuator geometry must be simple, predictable, and easy to integrate into brackets or narrow mechanical paths. It also supports the broader appeal of the SM Series: compact size, precise switching response, and strong lifecycle performance.

For teams comparing several actuator formats, the straight lever configuration of this model can simplify design decisions where rolling contact is unnecessary. For more about Honeywell, reviewing parallel SM Series part numbers often clarifies whether the design challenge is electrical or purely mechanical.

FAQ

What actuator is used in the Honeywell 111SM247 basic switch?

This model is commonly described as a straight lever version, making it suitable where a direct, controlled lever contact is preferred over a roller-style interface.

Is the Honeywell 111SM247 basic switch intended for repeated operation?

Yes. The switch is typically listed with a mechanical life up to 10,000,000 operations, which signals that it is designed for repeated cycling in equipment that actuates the switch frequently.

Why does high-temperature construction matter?

It broadens the environments in which the switch may be considered. In compact equipment, heat can build up from nearby electronics, motors, or confined enclosures, so thermal capability is often a meaningful selection factor.

What should be checked during specification?

Users should verify lever path, mounting center compatibility, solder layout, and the actual switching load. Small subminiature switches perform best when the surrounding mechanism respects their intended travel and force window.