Generac 077220A OEM Generator-Side Coil for Select 100A HSB Transfer Switches

Description

The Generac 077220A is a genuine OEM generator-side electromagnetic coil for select 100-amp Generac and Guardian home standby automatic transfer switches. It is typically installed as the bottom coil within compatible transfer-switch mechanisms. This Generac generator-side coil replaces part number 77220A and ships new, in a package of one coil.

The 100A specification refers to the compatible transfer-switch rating, not the coil’s electrical current rating.

Why Choose the Generac 077220A OEM Coil

A transfer switch coil is a small part, but it controls how your standby system moves between utility and generator power. Choosing a genuine OEM replacement helps ensure you receive the exact component specified by the manufacturer for your compatible transfer switch.

The Generac 077220A is made by Generac and is not discontinued by the manufacturer.

Generac 077220A Product Features

• Genuine Generac OEM replacement component
• Part number: 077220A
• Replaces part number: 77220A
• Generator/standby-side transfer-switch coil
• Typically installed in the bottom position
• Designed for select 100A Generac and Guardian transfer switches
• Package quantity: 1 coil
• Condition: New

Product Information

• Manufacturer: Generac
• Brand: Generac
• SKU: 767870160042
• Item weight: 0.866 lb
• Dimensions: 3 × 3 × 3 in.
• Discontinued by manufacturer: No

Generator-Side Coil vs. Utility Coil

This is the generator-side coil. The utility coil is installed on the side of the compatible mechanism. Make sure you are ordering the coil for the correct position before you place your order.

Diagnosing a Failed or Shorted Transfer Switch Coil

When diagnosing a failed or shorted coil, inspect the associated 084464 limit switches and the control circuit. Replace additional components only when testing confirms damage or when required by the applicable service procedure.

Check Compatibility Before You Order

Before ordering, verify the following on your transfer switch:

• Transfer-switch model
• Serial number
• Amperage
• Coil position
• Original part number

Matching these details helps you confirm that the Generac 077220A is the right replacement for your Generac or Guardian home standby transfer switch.

Important Safety Information

Warning: Transfer switches contain potentially lethal utility and generator voltage. Installation and testing should be performed by a qualified technician after every power source has been isolated.

Generac 077220A FAQ

Is the Generac 077220A a generator-side or utility coil?

The Generac 077220A is a generator-side coil. It is typically installed in the bottom position. The utility coil is installed on the side of the compatible mechanism.

Does the 100A rating describe the coil’s current rating?

No. The 100A specification refers to the compatible transfer-switch rating, not the coil’s electrical current rating. This coil is designed for select 100A Generac and Guardian transfer switches.

Does this coil replace part number 77220A?

Yes. The Generac 077220A replaces part number 77220A. Verify your transfer-switch model, serial number, amperage, coil position, and original part number before ordering.