myMectronic
myMectronic

A Premier B2B Part Search

OptiFuse 143050 Automotive Circuit Breaker

This Type III automotive circuit breaker is designed for panel mounting, offering high current protection up to 50A and a voltage capacity of 42 VDC maximum. It features an auto-reset mechanism and waterproof construction, making it ideal for automotive applications. The breaker is UL-rated with a thermoset plastic frame, meeting SAE J162S and SAE J1171 standards for ignition protection. It provides reliable circuit protection against overcurrent, with precise mechanical dimensions and mounting torque specifications, ensuring durability and safety in demanding automotive environments.

Authorized Distributors
Source:Newark
Part No:143050
Stock:7
Inv Date:06-05-2026
Price: Unit price: $447.36
Buy/RFQ:
Part No:143050
Stock:0
Inv Date:06-06-2026
Price: N/A
Buy/RFQ:
Part No:143050
Stock:0
Inv Date:06-05-2026
Price: Unit price: $44.92
Buy/RFQ:
Part No:143050
Stock:0
Inv Date:06-05-2026
Price: Unit price: $58.92
Buy/RFQ:
Part No:143050
Stock:0
Inv Date:06-05-2026
Price: Unit price: $58.92
Buy/RFQ:

OptiFuse 143050 Automotive Circuit Breaker Specifications:

  • Voltage: 42 VDC maximum
  • Amperage ratings: 50A (others available up to 200A)
  • Interrupting Rating: 3000A @ 30VDC
  • IP Rating: IP67
  • Frame Material: Thermoset Plastic, UL rated 94-VO
  • Mounting Torque: 40 in-Ib Max
  • Stud Torque: 50 in-Ib Max
  • Mechanical Dimensions: 2.91 inches (74 mm) length, 1.21 inches (30.75 mm) width
  • Designed to meet SAE J162S and SAE J1171 ignition protected standards
  • High current automotive type III design
  • Manual reset and waterproof construction
  • Rated for high current applications, suitable for automotive circuits
  • Operational time characteristics include no trip at 100%, trips at 135% for 30 min, 200% trip for 12s to 45s

Buy the Optifuse Series Type III Automotive Circuit Breaker: 143050

Purchase the Optifuse 143050 automotive circuit breaker online to ensure your vehicle's electrical system is protected with high current, waterproof, and auto-reset features. Designed for panel mounting, this Type III breaker provides reliable overcurrent protection up to 50A at 42VDC maximum. Its rugged thermoset plastic frame and IP67 rating guarantee durability against harsh conditions. Easy to install with precise mounting dimensions, the breaker meets SAE ignition protection standards, ensuring safety and compliance for automotive electrical systems.

Get Optifuse 143050 today—built for high current automotive protection with waterproof durability and reliable auto-reset functionality.

Frequently Asked Questions

Where can I buy OptiFuse 143050?

You can click on the BUY or RFQ button to purchase 143050 from an authorized OptiFuse distributor.

How do I troubleshoot issues or seek technical support for part 143050?

You can download the 143050 datasheet or visit the OptiFuse website for support.

Who is the manufacturer of 143050?

OptiFuse

OptiFuse Part List

Browse and search other OptiFuse parts, locate datasheets and stock

Sponsored by