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Grey Square D EDB bolt-on breaker with toggle switch

SQUARE D

SQUARE D EDB14020 circuit breaker 20A 1 pole 277V EDB series bolt-on

SKU CH-0FXV-NYD38

A bolt-on miniature circuit breaker rated 20 A, single-pole at 277 V AC with an 18 kA interrupting rating at 120/240 V AC for Square D NF panelboards

  • Protects 20 A single-phase circuits with 18 kA interrupting at 120/240 V
  • Bolt-on mounting fits Square D NF panelboards for quick installation
  • 277 V AC rating suits commercial lighting and HVAC loads
  • Compact 5.7 in length by 1 in width saves panel space
  • Operates reliably up to 104 °F ambient temperature

SQUARE D EDB 20 A bolt-on breaker

The SQUARE D EDB14020 is a miniature circuit breaker rated at 20 A for single-phase AC circuits up to 277 V. It mounts by bolt-on connection into compatible Square D NF panelboards and load centers. The unit is supplied new and carries an E-frame 125 A frame size.

18 kA interrupting rating at 120/240 V

The decisive specification is the maximum AIR rating of 18 kA at 120/240 V AC. This rating determines whether the breaker can safely clear the prospective fault current in your installation. Verify the available short-circuit current before selecting this device.

Thermal-magnetic operation under sustained load

The breaker uses a thermal-magnetic trip mechanism that responds to prolonged overcurrents and instantaneous short circuits. It is rated for a maximum operating temperature of 104 °F inside the enclosure. The design does not carry a DC voltage rating, so it is not suitable for DC applications.

Highlights

  • Protects 20 A single-phase circuits with 18 kA interrupting at 120/240 V
  • Bolt-on mounting fits Square D NF panelboards for quick installation
  • 277 V AC rating suits commercial lighting and HVAC loads
  • Compact 5.7 in length by 1 in width saves panel space
  • Operates reliably up to 104 °F ambient temperature

Specifications

BrandSQUARE D

Questions about this item

What does the 20 A rating mean once the breaker is installed in a panel?

It means the breaker will carry up to 20 A continuously and trip on sustained overloads or short circuits to protect the downstream wiring.

What does the 18 kA AIR rating at 120/240 V AC limit in practice?

It limits the maximum prospective fault current the breaker can safely interrupt on a 120/240 V AC system to 18 000 A.

What panel space and mounting style does the 5.7 in by 1 in bolt-on frame need?

It needs a single-pole slot in a Square D NF panelboard and bolts directly onto the panel's bus bars.

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