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OptiFuse 143040 Automotive Circuit Breaker

This high current Type III automotive circuit breaker features auto-reset functionality, designed for demanding vehicle applications. It operates at a maximum voltage of 58V DC, with rated currents from 25A to 200A, and includes waterproof, ignition-protected features complying with SAE J162S and SAE J1171 standards. Its robust thermoset plastic frame offers durability, with mechanical dimensions suitable for panel mounting. The device's interrupting rating is 3000A at 30VDC, making it ideal for automotive circuitry that demands reliable overcurrent protection in extreme conditions.

Authorized Distributors
Source:DigiKey
Part No:143040
Stock:567
Inv Date:06-05-2026
Price: Unit price: $71.24
Buy/RFQ:
Part No:143040
Stock:0
Inv Date:06-05-2026
Price: Unit price: $44.92
Buy/RFQ:

OptiFuse 143040 Automotive Circuit Breaker Specifications:

  • Voltage: 58V DC maximum
  • Amperage: 25A to 200A, rated at 40A for specific use
  • Interrupting Rating: 3000A @ 30VDC
  • IP Rating: P67
  • Frame Material: Thermoset Plastic, UL rated 94-VO
  • Mechanical Dimensions: 2.91 inches [74 mm] length, 1.21 inches [30.75 mm] width, 0.55 inches [14 mm] height
  • Mounting Torque: 40 in-Ib max
  • Stud Torque: 50 in-Ib max
  • Compliance: SAE J162S; SAE J1171 (Ignition Protected)
  • Time Characteristics: 100% rated current no trip, 135% trip at 30m, 200% trip in 12-45s, 300% trip in 3.58-15s
  • Environmental Rating: Waterproof (IP67)
  • Operation: Auto-reset for high current protection in automotive systems

Buy the Optifuse 143040 – Reliable Automotive Circuit Breaker for Industrial Applications

Explore the reliable Optifuse Automotive Circuit Breaker designed for demanding vehicle applications. Rated at 40 Amps with waterproof IP67 protection, it offers auto-reset functionality for high-current protection. Built with a durable thermoset plastic frame and meeting SAE ignition protection standards, this circuit breaker is suitable for panel mounting in automotive systems operating up to 58V DC. Its high interrupting rating of 3000A ensures safety and reliability during electrical overloads, making it an essential component for vehicle electrical systems requiring precise and durable overcurrent protection.

Get Optifuse 143040 today—built for precision, durability, and high current automotive protection.

Frequently Asked Questions

Where can I buy OptiFuse 143040?

You can click on the BUY or RFQ button to purchase 143040 from an authorized OptiFuse distributor.

How do I troubleshoot issues or seek technical support for part 143040?

You can download the 143040 datasheet or visit the OptiFuse website for support.

Who is the manufacturer of 143040?

OptiFuse

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