Square D KC34125 – 125A 480VAC 3‑Pole I‑Line Molded Case Circuit Breaker, KC Frame, Thermal Magnetic, 100kA @240V / 65kA @480V

Description

KC34125

KC34125 is a Square D KC-frame molded case circuit breaker rated for 125 amps and 480 VAC. This 3‑pole breaker uses an I-Line style plug-on connection for quick and secure installation in Square D I-Line panelboards and switchboards.

It features a thermal magnetic trip unit with long-time and instantaneous (LI) protection for reliable defense against overloads and short circuits. The interrupting capacity varies by system voltage, providing extra-high fault clearing capability for commercial and industrial power distribution systems. Designed for 3‑phase service, the KC34125 is rated for continuous operation at 40 °C ambient temperature and meets UL and CSA certifications.

Interrupting Ratings

• 100 kA @ 240 VAC – extra-high interrupting capacity at lower voltages

• 65 kA @ 480 VAC – high interrupting capacity for 480 V systems

• Not rated @ 600 VAC – KC-series breakers typically do not have a UL listed interrupting rating at 600 V

Key Specifications

• Manufacturer: Square D

• Part Number: KC34125

• Amperage: 125 A

• Voltage Rating: 480 VAC

• Poles: 3

• Frame Type: KC

• Mounting Type: I-Line Style Plug-On

• Trip Unit: Thermal Magnetic

• Trip Functions: LI – Long-Time and Instantaneous

• Phase: 3

• Ambient Temperature Rating: 40 °C

• Certifications: UL, CSA

Specifications

• Part Number: KC34125

• Manufacturer: Square D

• Category: Circuit Breaker

• Item Subcategory: Molded Case

• Family: I-Line

• Type: KC

• Voltage: 480 VAC

• Amperage: 125 A

• Phase: 3

• Poles: 3

• AIC Rating: 100 kA @ 240 V / 65 kA @ 480 V

• Connection: I-Line Style Plug-On

• Functions: LI – Long-Time and Instantaneous

• Frame Size: K Frame

• Temperature Rating: -13 °F to 158 °F (-25 °C to 70 °C)

• Protection: Thermal Magnetic

Product Data

• UPC: 785901043508

• GTIN: 0078590143508

• Weight: ~10–13 lb

Returns are easy

You may return items within 30 days of delivery for a refund.

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