Square D QOB3501021 50A 3-Pole Thermal Magnetic Circuit Breaker – Bolt-On Mount – 240V

The Square D QOB3501021 Molded Case Circuit Breaker is a reliable overcurrent protection device designed for commercial, industrial, and OEM electrical distribution systems. Part of the QOB Series, this thermal-magnetic circuit breaker provides both long-time overload and instantaneous short-circuit protection. Its bolt-on mounting design ensures a secure installation in compatible Square D panelboards and distribution equipment.

Voltage and Rating

• Current Rating: 50 Amps
• Voltage Rating: 240 Volts AC
• Phase: 3-Phase
• Interrupting Capacity: 10 kAIC at 240V AC

Key Specifications

• Brand: Square D
• Manufacturer: Schneider Electric
• Model Number: QOB3501021
• Series: QOB Series
• Product Type: Molded Case Circuit Breaker (MCCB)
• Number of Poles: 3-Pole
• Mounting Type: Bolt-On
• Breaker Type: Thermal Magnetic

Technical Specifications

• Trip Function: LI (Long-Time and Instantaneous)
• Protection Type:
  • Long-Time Overload Protection
  • Instantaneous Short-Circuit Protection
• Connection Type: Bolt-On
• Interrupt Rating: 10 kAIC @ 240V AC
• Operating Mechanism: Thermal-Magnetic Trip Unit

Dimensions and Weight

• Height: 2.91 in
• Width: 2.99 in
• Depth: 3.11 in
• Weight: 1.18 lbs

Features and Benefits

• Provides dependable overload and short-circuit protection.
• Bolt-on mounting ensures secure installation and improved reliability.
• Thermal-magnetic trip unit delivers accurate circuit protection.
• Compact design saves valuable panel space.
• Suitable for commercial, industrial, and OEM applications.
• Manufactured to Square D quality and performance standards.

Applications

• Commercial Electrical Distribution Panels
• Industrial Control Panels
• OEM Equipment
• Motor Protection Circuits
• Branch Circuit Protection
• Power Distribution Systems
• Panelboards and Switchboards

Product Data

• Manufacturer: Schneider Electric
• Brand: Square D
• Family: QOB Series
• Part Number: QOB3501021
• Category: Molded Case Circuit Breakers / 3-Pole

Product Summary

• Product Name: Square D QOB3501021 50A 3-Pole Thermal Magnetic Circuit Breaker – Bolt-On Mount – 240V
• Current Rating: 50A
• Voltage Rating: 240V AC
• Poles: 3
• Mounting Type: Bolt-On
• Protection: Thermal Magnetic
• Trip Function: Long-Time and Instantaneous (LI)
• Interrupt Rating: 10 kAIC @ 240V AC
• Weight: 1.18 lbs
• Application: Commercial and industrial circuit protection.

Returns are easy

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

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My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.