Square D S37447 Circuit Breaker Lug Shield 150A

Product Description

The SQUARE D S37447 is a lug shield accessory designed for 150-amp circuit breakers in the PowerPact H-Frame product family. The lug shield covers exposed wire termination points at the breaker lug connections, reducing the risk of accidental contact with energized conductors. It is sized for use with 3/0 AWG conductors and fits directly onto compatible H-Frame breaker terminals. Electricians and panel technicians install this component as part of a complete breaker assembly in commercial and industrial distribution equipment where finger-safe termination covers are required by code or site safety standards.

This lug shield is used in commercial electrical distribution panels and motor control applications where PowerPact H-Frame circuit breakers are installed. It is a direct accessory for 150-amp H-Frame breakers and is typically installed during initial panel build-out or when upgrading an existing breaker installation to meet arc flash or finger-safe requirements. The part ships individually and is intended for use by licensed electricians performing panel work on low-voltage distribution systems.

Key Features

• Covers exposed lug terminations on 150-amp PowerPact H-Frame circuit breakers
• Compatible with 3/0 AWG conductor installations
• Compact form factor at 4.8 inches long, 3.7 inches wide, and 1.3 inches tall
• Lightweight at 0.12 pounds for easy handling during panel assembly
• OEM accessory designed to fit H-Frame breaker lug geometry without modification

Compatibility

Designed for use with the SQUARE D PowerPact H-Frame circuit breaker series, specifically 150-amp configurations with 3/0 AWG lug terminations, as stated by the manufacturer.

Installation Notes

Installation should be performed by a licensed electrician. Verify that the circuit breaker is in the OFF position and that upstream supply power has been de-energized and locked out before handling any lug components. Confirm conductor size matches 3/0 AWG before seating the lug shield. Follow applicable NEC requirements for enclosure and termination protection when installing lug covers in distribution panels.