Cole Hersee 30056‑20 20A Circuit Breaker (NOS, Boxed)

$19.99

type: Unknown Type
Vendor: CorvairFarmer

Description:

Cole Hersee Co. — 30056‑20 — Circuit Breaker Features: • Genuine Cole Hersee Co. part • Model 30056‑20 — 20A automatic‑reset breaker • Dual threaded terminals with hardware • Ideal for trucks, trailers, marine, tractors, and industrial equipment • NOS condition with original packaging

Key Specs

  • Brand: Cole Hersee (Boston, MA)

  • Model: 30056‑20

  • Amperage: 20 amps

  • Voltage: 12V systems (also used in 24V fleets)

  • Type: Automatic‑reset thermal circuit breaker

  • Terminals: Dual threaded studs with nuts/washers

  • Mounting: Through‑panel or bracket

  • Era: 1960s–1990s heavy‑duty aftermarket

Cole Hersee breakers were known for reliability under vibration, heat, and moisture — which is why they dominated commercial fleets.


🚚 Correct Applications

The 30056‑20 shows up across multiple industries:

Automotive & Light Trucks

  • GM, Ford, Chrysler accessory circuits

  • Headlamp protection circuits

  • Power window/seat feeds

  • Trailer towing packages

  • RV electrical systems

Heavy‑Duty Trucks

  • Freightliner

  • International Harvester

  • Kenworth

  • Peterbilt

  • Mack

  • Municipal fleet vehicles

Marine

  • Bilge pumps

  • Navigation lights

  • Accessory panels

  • Battery distribution blocks

Agriculture & Industrial

  • Tractors

  • Skid steers

  • Forklifts

  • Construction equipment

  • Material‑handling machinery

If it needed rugged circuit protection, Cole Hersee was the go‑to.

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