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Pair of red and black battery booster clamps with parrot jaws and vinyl insulation

Westward

Westward 23PC39 Medium Duty Boost Cable Clamp 500A Red Black

SKU CH-27PT-NVZ7X

Medium-duty booster clamps rated 500 A for 12 V and 24 V systems, with 1–4 AWG vinyl-insulated steel jaws opening 4 1/4 in

  • TypeAccessories & Compressors
  • Handles up to 500 A for reliable jump-starts
  • Works with 12 V and 24 V systems
  • Jaw opens 4 1/4 in to fit thick cables
  • Steel contacts with vinyl insulation for secure grip
  • Includes one red and one black clamp for polarity identification

Medium Duty Boost Cable Clamp

The Westward 23PC39 is a medium-duty boost cable clamp set rated for 500 A maximum current. It suits 12 V and 24 V systems and accepts cable gauges from 1 to 4 AWG. The package includes two clamps, one red and one black, with parrot-style jaws and vinyl insulation.

Sustained Load Behaviour

Steel and copper contacts deliver consistent conductivity while the vinyl insulation resists heat during extended jump-start or charging sessions. The 500 A rating applies to continuous use rather than momentary peaks, so voltage drop remains stable across the full cycle. The 4 1/4 in jaw opening maintains firm grip on large battery posts without slipping.

Upgrade Path And Fit

This set replaces lighter clamps rated below 500 A or those limited to smaller gauge wire. The jump is worth it when moving to heavier gauge cables or when a shop needs reliable medium-duty service clamps for daily use. Buyers who need higher amperage capacity or specialised marine-grade terminals should look elsewhere.

Highlights

  • Handles up to 500 A for reliable jump-starts
  • Works with 12 V and 24 V systems
  • Jaw opens 4 1/4 in to fit thick cables
  • Steel contacts with vinyl insulation for secure grip
  • Includes one red and one black clamp for polarity identification

Specifications

BrandWESTWARD
TypeAccessories & Compressors

Questions about this item

Do the 500 A clamps generate noticeable heat when used continuously at 12 V or 24 V?

At their 500 A rating the copper contacts and steel jaws are designed to carry current without excessive temperature rise, though prolonged maximum-load use will warm the vinyl insulation.

What cable gauge must I already have to fit these clamps?

The clamps accept 1 to 4 AWG leads, so you need battery cable within that range and a crimp or solder lug to secure each lead.

Will the 4 1/4 in jaw opening grip the top-post terminals on my older vehicle?

The 4 1/4 in maximum jaw opening and parrot-jaw design fit most standard top-post and side-terminal batteries found on older cars and trucks.

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