Honeywell 555751 Pin Plunger Micro Switch V 15T16-CZ100A05: Global Buyer's Guide
Table of Contentsexpand_more
The Honeywell 555751 pin plunger micro switch (V 15T16-CZ100A05) is a single-pole double-throw (SPDT) snap-action switch rated 10 A at 250 VAC with quick-connect terminals. It is used wherever a compact, mechanically actuated electrical contact is needed — limit sensing, door interlocks, valve position feedback and machine guarding — and is available worldwide through 3G Electric.
What is a pin plunger micro switch?
A pin plunger micro switch is a snap-action electrical switch actuated by a small protruding plunger; when the plunger is depressed, an internal mechanism toggles the contacts between normally open (NO) and normally closed (NC) states. The Honeywell 555751 uses a pin plunger actuator and SPDT contact arrangement, making it a drop-in choice for OEM and MRO replacements.
Honeywell is one of the most widely specified switch and control brands in industrial automation, and the 555751 series is a long-established format familiar to maintenance teams across packaging, HVAC, pump control and combustion equipment.
Honeywell 555751 key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Honeywell |
| Part number | 555751 |
| Series / model | V 15T16-CZ100A05 |
| Actuator type | Pin plunger |
| Contact configuration | SPDT (single-pole double-throw) |
| Rated current | 10 A |
| Rated voltage | 250 VAC |
| Terminal type | Quick-connect |
| Supply frequency compatibility | 50 Hz / 60 Hz |
All ratings above are taken from the manufacturer's published data for this part. Where a datasheet is not to hand, always confirm the exact actuator and terminal variant against the machine drawing before ordering.
How does a pin plunger micro switch work?
Depressing the plunger moves an internal spring-loaded mechanism past its toggle point, causing the contacts to snap from one state to the other. Because the changeover is fast and independent of how slowly the plunger is pressed, micro switches give clean, repeatable switching — important for control circuits and safety interlocks.
In the 555751, the SPDT arrangement provides one normally open and one normally closed contact set, so the same switch can signal "position reached" while also breaking a circuit when the actuator is released.
Where is the Honeywell 555751 used?
- Machine guarding and door interlocks — detecting whether a guard or access door is closed.
- Limit and position sensing — end-of-travel detection on actuators, conveyors and packaging lines.
- Valve and damper feedback — confirming open/closed state on HVAC and process valves.
- Pump and combustion controls — auxiliary switching in control panels and burner management circuits.
- OEM equipment — as a compact, replaceable sensing element in original designs.
Because the switch is rated 10 A at 250 VAC, it can often switch small loads directly, reducing the need for separate relays in low-power control circuits.
How to choose the right micro switch
- Confirm contact configuration. SPDT gives changeover flexibility; if you only need on/off, an SPST variant may be cheaper, but the 555751's SPDT format is the safer universal replacement.
- Check the electrical rating. 10 A at 250 VAC covers most control and small-load applications; verify your load current and voltage, including 50 Hz or 60 Hz supply as applicable in your region.
- Match the actuator. Pin plunger suits direct mechanical actuation; lever or roller variants may be needed where the actuating force or travel differs.
- Verify terminal style. Quick-connect terminals speed field replacement; confirm spade size and wiring harness compatibility.
- Consider environment. Check ingress protection, temperature and vibration requirements for the mounting location.
- Plan for spares. Micro switches are wear items; keeping a small stock reduces downtime.
Product selection ladder: Honeywell components from 3G Electric
While the 555751 is a mechanical switch, 3G Electric's Honeywell stock also covers the sensing and safety components that often sit alongside it in the same panels and machines. The table below compares representative items to help you plan a complete spares kit.
| Product | Function | Typical use |
|---|---|---|
| Honeywell BW Quattro Catalytic LEL Sensor | Combustible gas detection, 2-year life | Gas monitoring in industrial environments |
| Honeywell Touchpoint Plus Ex NDIR Infrared Sensor | Combustible gas detection, 0–100% LEL, SIL 1 | Safety-critical gas monitoring |
| Honeywell BW Flex H2S Sensor | Hydrogen sulfide detection, 0–200 ppm | Toxic gas exposure monitoring |
| Honeywell BW RigRat / MultiRAE Replacement Membrane | Sensor membrane replacement | Restoring gas detector performance |
| Honeywell BW Flex Series LCD Kit | Display restoration | Field repair of gas detectors |
Step up to the infrared or catalytic sensors when you need continuous gas detection rather than simple position feedback. For routine maintenance, the membrane and LCD kits keep existing detectors in service.
Why source the Honeywell 555751 from 3G Electric?
3G Electric supplies industrial equipment, parts and supplies across 14 departments — from controls and instrumentation to pumps, combustion and material handling — with specialist depth in combustion, pumps and controls. We stock 46+ Honeywell-related products and can interpret your demand, source the right part and support installation questions.
For worldwide buyers, we offer incoterms-neutral supply, export documentation experience and cross-market voltage/frequency variants (50 Hz and 60 Hz). Pricing is quoted in USD. We are a distributor and supplier, not an authorized dealer for every brand, but we are accountable for getting you the right answer.
According to Honeywell's published micro switch datasheets, the V15 series is designed for "reliable switching in a wide range of industrial applications" — always confirm the exact actuator and terminal variant against the datasheet for your part number.
Frequently asked questions
What is the Honeywell 555751 used for? It is a pin plunger micro switch used for position sensing, limit detection, door interlocks and valve feedback in industrial control circuits. Its SPDT contacts and 10 A / 250 VAC rating suit many small-load switching duties.
Is the 555751 compatible with 50 Hz and 60 Hz supplies? Yes — the 250 VAC rating applies to both 50 Hz and 60 Hz supplies. Confirm your local voltage and frequency when specifying for export markets.
Can I buy the Honeywell 555751 in Worldwide? Yes. 3G Electric supplies this switch and related Honeywell components worldwide, with export documentation and USD pricing. Contact us for lead times and shipping options.
What is the difference between SPDT and SPST micro switches? SPDT has three terminals (common, normally open, normally closed) and can switch between two circuits; SPST has two terminals and simply opens or closes one circuit. SPDT offers more wiring flexibility.
How do I replace a micro switch safely? Isolate power, note the terminal wiring, and match the actuator and terminal style. Use the manufacturer's datasheet to confirm ratings, and test the circuit before returning to service.
Key takeaways
- The Honeywell 555751 is a 10 A, 250 VAC SPDT pin plunger micro switch with quick-connect terminals.
- It suits interlocks, limit sensing and position feedback across industrial equipment.
- Confirm actuator, terminal and environmental specs before ordering.
- 3G Electric stocks Honeywell components and supports worldwide buyers with export documentation and USD quotes.
Ready to order or need help specifying? Contact 3G Electric for quotes, sizing assistance and technical support on the Honeywell 555751 and the wider Honeywell range.
