Eaton Cutler Hammer KG3400S42 400A 3-Pole Generator Molded Case Circuit Breaker – Bolt-On – 600VAC – Thermal-Magnetic Interchangeable Trip (1000–2000A Range) with S42 Shunt Trip Option

The Eaton Cutler-Hammer KG3400S42 is a K-frame molded case generator circuit breaker designed for high-capacity generator and industrial systems. It features a thermal-magnetic interchangeable trip unit with a 1000–2000 Amp magnetic trip range, providing reliable protection against overloads and short circuits.

This model includes the S42 option, which provides a 12–24V DC shunt trip, left pole mounted, exiting rear, enabling remote tripping functionality for enhanced operational flexibility.

Rated at 400 Ampere at 40°C with 3 poles, it is ideal for generator panels, switchgear, and industrial backup power systems.

Key Features

• K-Frame Generator Circuit Breaker for high-capacity protection
• Thermal-Magnetic Interchangeable Trip Unit
• High magnetic trip range: 1000–2000 Amp
• S42 Shunt Trip Option: 12–24V DC, Left Pole Mounted, Exiting Rear
• Bolt-On Connection for secure installation
• Line and Load Terminals Standard

Specifications

• Manufacturer: Eaton / Cutler-Hammer
• Model: KG3400S42
• Frame Type: K
• Rated Current: 400 Ampere
• Poles: 3
• Maximum Voltage: 600 VAC
• Frequency: 50/60 Hz
• Trip Unit Type: Thermal-Magnetic Interchangeable
• Magnetic Trip Range: 1000–2000 Ampere
• Interrupting Capacity:
• • 18 kA @ 240 VAC
  • 14 kA @ 480 VAC
  • 10 kA @ 600 VAC
• Connection: Bolt-On
• Standard Lug Type: Line and Load End Terminals
• Configuration Option:
  • S42: 12–24V DC Shunt Trip, Left Pole Mounted, Exiting Rear
• Warranty: One Year

Applications

• Medium-to-large generator protection
• Industrial and commercial switchgear integration
• Backup power and emergency generator systems
• High-capacity power distribution panels

Notes

The product image shows a base model for identification. Eaton provides free accessory installation for your specific configuration—include details in the order comment box during checkout.

Returns are easy

You may return items within 10 days of delivery for a refund.

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