Thermo King Three-Phase Circuit Breaker 3-Pole 421445
Official OEM Thermo King parts catalog entry for the Thermo King 421445 Circuit Breaker 3 Pole, verified by PEAK Thermo King and West Texas Thermo King Texas, Utah, Wyoming, Washington, Oregon, serving all of the USA.
Built for Performance: The Thermo King 421445 Circuit Breaker 3 Pole delivers OEM-grade overload and short-circuit protection for Thermo King refrigeration systems, ensuring synchronized interruption of three-phase power in transport refrigeration applications. This component supports uptime and precise temperature control across reefer fleets operating in demanding West Texas conditions.
Key Features & Customer Benefits
- Three-Pole Configuration – Ensures simultaneous disconnection of all three phases to protect compressors and electrical controls from phase imbalance or fault conditions.
- OEM Thermo King Specification – Installs with confidence in Thermo King service environments to maintain system integrity and fleet reliability.
- Robust Electrical Protection – Minimizes risk of downtime by interrupting overloads and short circuits to preserve critical temperature control.
- Serviceability – Designed for straightforward inspection and replacement during scheduled maintenance intervals to support fast return-to-service.
- Fleet Uptime Focus – Supports continuous operation of reefer trailers and transport refrigeration units to protect cargo and operational ROI.
Product Details
Part Number: 421445. The Thermo King 421445 Circuit Breaker 3 Pole is a three-pole protective device engineered to interrupt all three phases of a three-phase supply simultaneously, a standard requirement for transport refrigeration systems that use three-phase compressors or control circuits. This circuit breaker serves as an OEM replacement component for Thermo King electrical protection assemblies and integrates into service procedures followed by certified dealerships. Exact electrical ratings and mounting form factor are documented in Thermo King technical manuals and should be confirmed against the vehicle or unit serial number prior to installation.
Efficiency & Sustainability
Proper electrical protection contributes to efficient, dependable refrigeration operation by preventing damage that leads to energy waste or premature component replacement. When paired with Thermo King control systems and monitoring solutions, this circuit breaker supports consistent temperature control that aligns with fuel-efficient cooling strategies. West Texas Thermo King advises integration with Smart Reefer and compatible monitoring solutions where available to enhance operational efficiency and regulatory compliance.
Installation & Maintenance Tips
Install this circuit breaker according to Thermo King service instructions and local electrical codes. Use OEM fasteners and approved wiring practices for secure connections. Inspect the breaker during routine maintenance intervals and replace if mechanical wear or electrical damage is present. For professional installation and calibration, schedule service with West Texas Thermo King certified technicians to ensure correct fitment and system protection.
Real-World Applications
The Thermo King 421445 Circuit Breaker 3 Pole fits into transport refrigeration systems on reefer trailers, refrigerated trucks, and transport units that require three-phase protection. It protects compressors, control assemblies, and associated switchgear across operations in Amarillo, Lubbock, Odessa, and the Permian Basin, where consistent temperature control is mission-critical for cargo integrity and fleet economics.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
View all Thermo King PartsBacked by Thermo King’s engineering and supported by certified technicians at West Texas Thermo King, this component delivers lasting performance and uptime assurance for fleet operations.
For product verification or service assistance, call (806) 376-5837.
For current warranty eligibility or OEM replacement coverage, please contact us for warranty information or contact the service department for confirmation.
Frequently Asked Questions
Q: Is the Thermo King 421445 Circuit Breaker 3 Pole compatible with three-phase Thermo King units?
A: Yes. The 421445 circuit breaker is designed to provide three-phase protection for Thermo King transport refrigeration electrical systems. Confirm electrical ratings in the unit service manual before installation.
Q: Can local service teams install this circuit breaker?
A: Certified technicians at West Texas Thermo King perform installation and testing to ensure correct wiring, secure mounting, and compliance with Thermo King service standards.
Q: How does this breaker support fleet uptime?
A: By interrupting overloads and faults across all three phases simultaneously, the breaker prevents electrical damage to compressors and controls, reducing downtime and preserving consistent temperature control.
Related Resources
Ask about fleet-wide parts programs through West Texas Thermo King.
Produced by a certified Thermo King dealership, West Texas Thermo King | a Division of PEAK Industrial. Servicing fleets across Amarillo, Lubbock, and Odessa.
Official OEM Thermo King parts catalog entry for the Thermo King 421445 Circuit Breaker 3 Pole, verified by PEAK Thermo King and West Texas Thermo King Texas, Utah, Wyoming, Washington, Oregon, serving all of the USA.
Built for Performance: The Thermo King 421445 Circuit Breaker 3 Pole delivers OEM-grade overload and short-circuit protection for Thermo King refrigeration systems, ensuring synchronized interruption of three-phase power in transport refrigeration applications. This component supports uptime and precise temperature control across reefer fleets operating in demanding West Texas conditions.
Key Features & Customer Benefits
- Three-Pole Configuration – Ensures simultaneous disconnection of all three phases to protect compressors and electrical controls from phase imbalance or fault conditions.
- OEM Thermo King Specification – Installs with confidence in Thermo King service environments to maintain system integrity and fleet reliability.
- Robust Electrical Protection – Minimizes risk of downtime by interrupting overloads and short circuits to preserve critical temperature control.
- Serviceability – Designed for straightforward inspection and replacement during scheduled maintenance intervals to support fast return-to-service.
- Fleet Uptime Focus – Supports continuous operation of reefer trailers and transport refrigeration units to protect cargo and operational ROI.
Product Details
Part Number: 421445. The Thermo King 421445 Circuit Breaker 3 Pole is a three-pole protective device engineered to interrupt all three phases of a three-phase supply simultaneously, a standard requirement for transport refrigeration systems that use three-phase compressors or control circuits. This circuit breaker serves as an OEM replacement component for Thermo King electrical protection assemblies and integrates into service procedures followed by certified dealerships. Exact electrical ratings and mounting form factor are documented in Thermo King technical manuals and should be confirmed against the vehicle or unit serial number prior to installation.
Efficiency & Sustainability
Proper electrical protection contributes to efficient, dependable refrigeration operation by preventing damage that leads to energy waste or premature component replacement. When paired with Thermo King control systems and monitoring solutions, this circuit breaker supports consistent temperature control that aligns with fuel-efficient cooling strategies. West Texas Thermo King advises integration with Smart Reefer and compatible monitoring solutions where available to enhance operational efficiency and regulatory compliance.
Installation & Maintenance Tips
Install this circuit breaker according to Thermo King service instructions and local electrical codes. Use OEM fasteners and approved wiring practices for secure connections. Inspect the breaker during routine maintenance intervals and replace if mechanical wear or electrical damage is present. For professional installation and calibration, schedule service with West Texas Thermo King certified technicians to ensure correct fitment and system protection.
Real-World Applications
The Thermo King 421445 Circuit Breaker 3 Pole fits into transport refrigeration systems on reefer trailers, refrigerated trucks, and transport units that require three-phase protection. It protects compressors, control assemblies, and associated switchgear across operations in Amarillo, Lubbock, Odessa, and the Permian Basin, where consistent temperature control is mission-critical for cargo integrity and fleet economics.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
View all Thermo King PartsBacked by Thermo King’s engineering and supported by certified technicians at West Texas Thermo King, this component delivers lasting performance and uptime assurance for fleet operations.
For product verification or service assistance, call (806) 376-5837.
For current warranty eligibility or OEM replacement coverage, please contact us for warranty information or contact the service department for confirmation.
Frequently Asked Questions
Q: Is the Thermo King 421445 Circuit Breaker 3 Pole compatible with three-phase Thermo King units?
A: Yes. The 421445 circuit breaker is designed to provide three-phase protection for Thermo King transport refrigeration electrical systems. Confirm electrical ratings in the unit service manual before installation.
Q: Can local service teams install this circuit breaker?
A: Certified technicians at West Texas Thermo King perform installation and testing to ensure correct wiring, secure mounting, and compliance with Thermo King service standards.
Q: How does this breaker support fleet uptime?
A: By interrupting overloads and faults across all three phases simultaneously, the breaker prevents electrical damage to compressors and controls, reducing downtime and preserving consistent temperature control.
Related Resources
Ask about fleet-wide parts programs through West Texas Thermo King.
Produced by a certified Thermo King dealership, West Texas Thermo King | a Division of PEAK Industrial. Servicing fleets across Amarillo, Lubbock, and Odessa.
