Siemens 3TA4P8500 Circuit Breaker Md Nd Aluminum Body

Product Description

The SIEMENS 3TA4P8500 is a circuit breaker with an aluminum body, designed for use in molded-case breaker applications across the MD and ND frame families. This unit serves as a core overcurrent protection component in commercial and industrial electrical distribution systems. Licensed electricians install this breaker during panel builds, service upgrades, and equipment branch circuit protection work. The aluminum body construction keeps weight manageable while maintaining structural integrity in demanding installation environments. At 5.5 pounds, it is a substantial unit suited for fixed switchgear and load center applications.

This breaker is appropriate for commercial and light industrial electrical distribution panels where MD or ND frame circuit breakers are specified. It is typically installed in switchboards, panelboards, or motor control centers requiring molded-case overcurrent protection. Electricians and electrical contractors working on branch circuit protection, feeder circuits, or service entrance equipment will encounter this frame type in standard distribution builds.

Key Features

• Aluminum body construction reduces overall unit weight without sacrificing frame rigidity
• MD and ND frame compatibility broadens installation flexibility across panel configurations
• Molded-case design provides reliable overcurrent and short-circuit protection
• Compact dimensional profile supports installation in space-constrained enclosures

Compatibility

Designed as an OEM-style replacement or direct-install circuit breaker for MD and ND frame molded-case breaker applications in commercial and industrial electrical distribution equipment.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. Always de-energize and lock out the panel before installing or replacing any circuit breaker. Verify that the breaker frame rating and amperage match the panel schedule and wire gauge before energizing. Do not force the breaker into a mismatched frame or enclosure.

Technical Specifications

• Body Material: Aluminum
• Frame Type: MD / ND
• Dimensions (L x W x H): 10.9 inches x 5.9 inches x 6.7 inches
• Weight: 5.5 pounds
• UPC: 78364322106

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3TA4P8500