Honeywell 111SM305-T2 Basic Switch Analysis
The Honeywell 111SM305-T2 basic switch is a compact SM Series snap-action switch developed for applications that need repeatable switching in a subminiature form factor. This model is especially interesting because published listings associate it with a formed lever configuration and gold-plated contacts, which can make it relevant in designs where signal quality, switching consistency, or low-voltage circuit behavior is a meaningful design concern. The Honeywell 111SM305-T2 basic switch is therefore more than a standard on/off component; it is a carefully specified electromechanical part.
Technical Characteristics of the Honeywell 111SM305-T2 Basic Switch
Technical sources describe the Honeywell 111SM305-T2 basic switch as an SPDT snap-action switch in the SM Series with solder termination, 5 A current rating, 250 V AC rating, 30 V DC rating, and mechanical life up to 10,000,000 cycles. Product data also points to an operating force around 1.67 N, operating temperature from -55 °C to 125 °C, body length near 19.84 mm, depth around 6.35 mm, and a special formed lever actuator. Another notable detail in datasheet-oriented listings is the mention of gold-plated contacts and reversed terminal designation on the switch case.
Why This Variant Stands Out in the SM Series
Many switch comparisons focus only on current rating, but the real distinction often lies in actuator geometry and contact system. In the case of the Honeywell 111SM305-T2 basic switch, the formed lever and gold-plated contact references suggest it can be particularly useful in applications where movement path and contact integrity both matter. That is a very different selection logic than simply choosing the lowest-cost switch with the same current class.
The model also reflects a broader engineering principle: a small switch can still be highly application-specific. For more about Honeywell, the wider SM range is useful because it shows how subtle changes in lever form and contact finish can support different device requirements without changing the overall switch family.
FAQ
What makes the Honeywell 111SM305-T2 basic switch different from standard SM variants?
The main distinguishing points are the special formed lever and the gold-plated contact references found in technical listings. Those features can influence both mechanical interaction and electrical performance.
Is the Honeywell 111SM305-T2 basic switch still a 5 A switch?
Yes. It is generally listed as a 5 A SPDT switch with 250 V AC and 30 V DC capability, so it remains within the common rating class of many SM Series power-capable variants.
Why do gold-plated contacts matter?
Gold plating is often relevant where lower-level signals or cleaner contact behavior are desirable. It can support more stable switching in certain circuit conditions compared with contact systems optimized mainly for higher current loads.
What should engineers review before choosing this model?
They should verify the lever path, force requirement, terminal layout, and circuit load profile. This model is most valuable when its specific actuator and contact configuration are intentionally matched to the application.