55014 Littelfuse 55014 Heavy Duty SPST Toggle Switch (On/Off) 12-36VDC SPST

The Littelfuse 55014 is a single-pole, single-throw (SPST) on/off toggle switch from the Standard Heavy Duty Series, engineered for universal use in harsh environments where reliability and long service life are essential. With a straightforward “On – Off” action and blade terminations for fast hookup, this switch is a natural fit for dashboards, control panels, and auxiliary circuits in equipment that must operate day in and day out without fuss.

At its core, the 55014 pairs a robust plastic body capped with plated steel for mechanical strength, a nickel-plated brass toggle for smooth actuation, and silver contacts for low resistance and corrosion resistance. That materials stack isn’t cosmetic—it’s the reason the switch maintains stable contact performance across years of vibration, dust, and moisture typical of mobile and heavy industrial environments.

Rated 10 A at 36 V DC (with ample headroom for lower-voltage systems), the 55014 comfortably covers lighting, small motors, pumps, fans, and control power in 12–36 V systems common to commercial vehicles and off-highway machinery. Installation is equally pragmatic: a nickel-plated brass face nut secures the bushing through a 0.46875 in (≈ 11.9 mm) panel hole and supports panel thicknesses up to 6.35 mm (¼ in). The 55014 is the classic SPST “On–Off” variant with 2 blade terminals and the standard toggle length—precisely what most users need for a clean, dependable on/off function.

Specifications

Note: Values above reflect the model information provided and common attributes of the Standard Heavy Duty series. Always confirm final electrical and environmental ratings against your specific application.

Applications

Built for on-vehicle and off-road control panels. The 55014 thrives in equipment that faces shock, vibration, dust, and temperature swings. Representative use cases include:

• Construction equipment — work lamps, beacon lights, cab blowers, engine bay service lights, auxiliary fuel pumps, DEF heaters, and control-power enables.

• Agricultural machinery — sprayer pumps, grain auger controls, cab fans, LED light bars, and accessory power.

• Material handling — forklift beacons, backup alarm enables, task lighting, and small DC loads on tug/AGV panels.

• Commercial vehicles — utility-body lights, PTO interlocks (enable line), cabin accessories, trailer work lights.

Beyond mobile fleets, the switch is equally at home in industrial controls, test benches, or DIY power distribution boxes where a clear, tactile on/off control is required.

Why the 55014 stands out

1. Simplicity that installs fast. Two blade terminals and a maintained on/off action mean quick wiring with standard ¼-inch female disconnects and an intuitive operator interface.

2. Mechanical integrity you can feel. The plated steel cap reinforces the threaded bushing and protects the mechanism from abuse when installers overtighten the panel nut or when the toggle takes the occasional knock.

3. Contact metallurgy that lasts. Silver contacts are a pragmatic choice for DC switching, offering low on-resistance and resilience to oxidation—key to dependable performance over time.

Design & installation notes

• Panel cutout: Use a standard 15/32-inch (0.46875 in / 11.9 mm) round hole. Deburr the edges so the face nut can seat flat.

• Panel thickness: Up to 6.35 mm (¼ in). Thicker panels may require a front plate or a rear counterbore.

• Terminations: Two blades accept common crimp disconnects; ensure high-quality crimps and strain relief to withstand vibration.

• Polarity / wiring: As an SPST on/off, the switch simply breaks or makes one line (often the positive feed) to the load. Keep wiring short and sized for current.

• Inrush considerations: Lamps, motors, and capacitive loads can draw surges above their steady-state current. Include fusing sized for the conductor and consider relays for very high inrush loads.

• Environmental protection: For exposed locations, consider a booted toggle or panel sealing washer from the same family if needed.

System integration tips

• 12/24/36 V DC fleets: The 10 A @ 36 V rating maps well across mixed-voltage vehicles. Size the fuse to protect the harness, not just the switch.

• Human-machine interface: The standard handle length gives gloved operators confident control feedback. Label the panel with “ON/OFF” legends in the operator’s language and orientation (up = on is common on many machines).

• Serviceability: Blade terminals enable fast replacement in the field; carrying a spare keeps downtime minimal.

55014 series variants

Below are common orderable variants associated with the 55014 family. They share the same core electrical function (SPST On/Off) and heavy-duty construction, and typically differ by packaging and/or minor configuration details. Use your purchasing spec or the latest datasheet/ordering matrix to select the exact code you need.

• 55014-BX — 55014 series switch supplied in a boxed presentation (individual unit).

• 55014-BP — 55014 series switch supplied in a bulk or alternative pack format (quantity/package as specified by distributor).

• 55014-05 — 55014 series variant; select by this code when your BOM or distributor listing calls for “-05”. Confirm any minor mechanical or packaging differences against your build requirements.

Selection tip: If you’re standardizing across a panel, choose the base 55014 electrical spec first, then match the orderable suffix (e.g., -BX, -BP, -05) to your preferred packaging or any small configuration options specified by your supply chain.

Reliability by construction

• Materials that fight corrosion: Silver contacts and a nickel-plated toggle reduce oxidation, while the plated steel cap shields against mechanical wear.

• Consistent actuation: The internal mechanism is designed for repeated cycles with stable contact pressure—important in DC switching where arcing is more persistent than in AC.

• Mounting robustness: The metal-capped bushing and face nut maintain clamp force on the panel, resisting loosening under vibration.

What you get

• Part: Littelfuse 55014 heavy-duty SPST on/off toggle switch

• Orderable options: 55014-BX, 55014-BP, 55014-05 (see above for selection notes)

Summary

If you are building or retrofitting control panels for vehicles, construction and ag equipment, or industrial rigs, the Littelfuse 55014 gives you a rugged, familiar toggle with the right DC ratings, materials, and mechanical design to handle the job. It installs in the industry-standard 15/32-inch hole, takes abuse without losing its feel, and uses silver contacts to maintain low resistance over time. In short: it’s the dependable, heavy-duty, on/off switch that fits where you need it and keeps working.

Whether you’re standardizing a fleet, upgrading legacy controls, or integrating a new accessory circuit, the 55014 is a safe, practical choice—backed by a wide, compatible family of toggles and convenient orderable variants (55014-BX / -BP / -05) to suit how you buy and build.