The 3-Wire Hinge Pin Explained

3-Wire Hinge Pin for Reach-In Cooler Doors


The 3-Wire Hinge Pin is an electrical hinge pin with three male leads. It slides into the gibb which is mounted to the frame of the case, on the hinge side of the door. It is visible from the customer side, and available in black and silver.

How It Works

This hinge pin is the middle component that transfers electrical current for temperature control from the female 3-wire hinge pin receptacle from inside the case into the glass door. This heating function prevents condensation, sweating, and frost buildup—problems that can block visibility, damage gaskets, and reduce energy efficiency.

Pro Tip for Techs

Apply a thin layer of electrical grease where the plug connects. This can prevent shorting and ensures consistent current flow when the door is opened and closed repeatedly throughout the day.

Compatible Door Brands

The 3-Wire Hinge Pin works with doors and cases from leading manufacturers such as:

When to Replace

Routine inspection of all door components is recommended as part of preventative maintenance. Replace the 3-Wire Hinge Pin if you notice any of the following:

  • Loose or worn connection

  • Door heater not receiving power

  • Glass door fogging, sweating, or condensation forming

  • Signs of overheating, arcing, or damage to the connection

Why It Matters

A failing 3-Wire Hinge Pin compromises the door heater system, leading to condensation, ice buildup, and visibility issues for customers. It also increases the risk of downtime and potential product loss if the case cannot maintain proper efficiency. Regular checks and timely replacement help extend door life, reduce service calls, and ensure coolers and freezers operate at peak performance.

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