THQB32070ST1 - 70Amp Circuit Breaker

THQB32070ST1 - 70 Amp Circuit Breaker

The THQB32070ST1 is a 70-amp, 3-pole bolt-on molded case circuit breaker designed to provide dependable circuit protection for your commercial, industrial, and institutional electrical systems. As part of the trusted THQB Q-Line series, this breaker combines reliable overcurrent protection with an integrated 120VAC shunt trip, allowing for remote tripping capabilities when connected to external control or emergency shutdown systems. Its compact bolt-on design helps ensure a secure installation while supporting long-term performance in demanding electrical distribution environments. With a 10kA interrupting rating at 240VAC, the THQB32070ST1 is engineered to help you protect conductors, equipment, and downstream electrical components from overloads and short circuits while supporting enhanced safety and operational control.

Key Features and Benefits

• 70 Amp Current Rating: For protecting higher-capacity branch circuits and electrical distribution systems.
• 3-Pole Configuration: Is designed for three-phase electrical applications.
• Integrated 120VAC Shunt Trip: Enables remote circuit breaker operation for emergency shutdown systems, fire safety controls, and other automated protection requirements.
• Bolt-On Mounting Design: Helps provide a secure connection within compatible panelboards and switchboards.
• 10kA Interrupting Capacity at 240VAC: Assists in protecting equipment against fault current conditions.
• Q-Line THQB Series Construction: Is known for dependable performance in commercial and industrial installations.
• HACR Rated: For applications involving heating, air conditioning, and refrigeration equipment.
• Molded Case Design: Helps safeguard internal components while supporting reliable operation.
  

Technical Specifications

• Part Number: THQB32070ST1
  
• Type: THQB
  
• Product Family: Q-Line
  
• Current Rating: 70 Amps
  
• Number of Poles: 3
  
• Voltage Rating: 240VAC
  
• Interrupting Rating (AIC): 10kA @ 240VAC
  
• Mounting Style: Bolt-On
  
• Shunt Trip Voltage: 120VAC
  
• HACR Rated: Yes
  
• Breaker Type: Molded Case Circuit Breaker
  
• Dimensions:
  • Height: 3.5 in.
  • Width: 4.0 in.
  • Depth: 2.81 in.

Material Compliance and Certifications

• HACR Rated: For heating, air conditioning, and refrigeration applications.
• Industry Performance Standards: Manufactured and tested to meet applicable industry performance standards for molded case circuit breakers.
• Code-Compliant Applications: Designed for use in compatible electrical distribution equipment where code-compliant circuit protection is required.
  

Where It Works Best

• The THQB32070ST1 is well-suited for commercial buildings, industrial facilities, manufacturing environments, educational campuses, healthcare facilities, and other installations requiring dependable three-phase circuit protection with remote tripping capability. Its integrated 120VAC shunt trip makes it especially valuable in systems that incorporate emergency power-off controls, fire alarm interfaces, safety interlocks, or centralized building management systems. It is also a strong choice for protecting HVAC and refrigeration equipment thanks to its HACR rating.