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Compact grey moulded case circuit breaker with bolt-on terminals and a single toggle switch

Eaton

Eaton GHB1020 Bolt-On Circuit Breaker 1-Pole 20A 277/480V AC 125V DC

SKU CH-8VG8-CX0PH

A 20 A single-pole bolt-on breaker rated 277/480 V AC and 125 V DC with a 14 kA interrupt rating for panelboard and motor-control-center branch protection

  • TypeElectrical Equipment
  • Dependable branch circuit protection in panels and busways
  • 14 kA interrupt rating at 277 V AC and 125 V DC
  • 20 A thermal-magnetic trip for reliable overload response
  • 277/480 V AC and 125 V DC voltage rating
  • Bolt-on G-frame design fits standard panelboard mounting

Bolt-On 20 A Breaker for 277/480 V Panels

The Eaton GHB1020 is a single-pole molded-case circuit breaker rated at 20 amps for 277/480 volt AC and 125 volt DC systems. It mounts by bolting directly onto the bus in panelboards, switchboards, motor control centers and busway installations. The non-interchangeable thermal-magnetic trip unit provides fixed overcurrent protection for branch circuits.

Replaces Worn GHB Units or Adds New Circuits

Swap this breaker in when an existing G-Frame device has tripped irreversibly or when expanding a panel with an open bolt-on position. The 14 kilo-amp interrupt rating at both 277 V AC and 125 V DC matches the original specification, so the upgrade restores the same fault-current capability. It is not suited for panels that require a higher interrupt rating or a different frame size.

20 A Continuous with 14 kAIC Headroom

The breaker carries 20 amps continuously on 50/60 Hz supplies and will interrupt faults up to 14 kilo-amps at the rated voltages. It handles typical lighting, receptacle and small motor loads within that envelope. Circuits demanding more than 20 amps or fault levels above 14 kilo-amps need a larger frame or higher-rated device.

Highlights

  • Dependable branch circuit protection in panels and busways
  • 14 kA interrupt rating at 277 V AC and 125 V DC
  • 20 A thermal-magnetic trip for reliable overload response
  • 277/480 V AC and 125 V DC voltage rating
  • Bolt-on G-frame design fits standard panelboard mounting

Specifications

BrandEaton
TypeElectrical Equipment

Questions about this item

What panelboard or busway mounting style does the GHB1020 bolt-on breaker require?

The GHB1020 uses a bolt-on mount designed for Eaton G-Frame panelboards, switchboards, motor control centers and busway applications.

What is the correct torque step when installing the bolt-on terminals on this 20 A breaker?

Torque the bolt-on terminal connections to the panelboard manufacturer’s specified value; the most common error is under-torquing the bolts, which can cause overheating.

When should the thermal-magnetic trip unit be replaced on this 277/480 V AC breaker?

Replace the breaker if it trips at or below the 20 A rating, shows contact discoloration, or after interrupting a fault near the 14 kA rating.

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