A4J80 Equivalent & Substitute Parts

Part Overview

The A4J80 is a Class J high-speed fuse manufactured by Mersen USA Newburyport-MA L.L.C., rated for 200kA AC breaking capacity. This component is designed for high-speed fault protection in electrical and industrial applications requiring rapid response to overcurrent conditions. The part maintains Active product status and is ROHS3 compliant, making it suitable for current procurement and deployment in compliant systems.

Equivalent and substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when system design requires components from different manufacturers while maintaining identical electrical and mechanical performance characteristics.

Substiute Parts

A4J80

Mersen USA Newburyport-MA L.L.C.In Stock: 938A4J80 Datasheet

Current PartRFQ

0JLS080.V

Littelfuse Inc.In Stock: 7320JLS080.V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A4J80 is determined by the following critical parameters:

• Fuse Class: J (Class J cartridge fuse standard)
• Breaking Capacity: 200kA at rated voltage
• Response Time: High-speed (fast blow)
• Voltage Rating: AC rated
• RoHS Compliance: ROHS3 Compliant
• Regulatory Approvals: CE, CSA, UL, QPL certifications

The substitute part 0JLS080.V from Littelfuse Inc. qualifies as an equivalent based on matching Class J specification, 200kA breaking capacity, fast-blow response characteristics, and ROHS3 compliance. Both parts are designed for identical electrical protection functions in Class J fuse holder applications.

Parameter Comparison

Engineering Selection Recommendations

Both the A4J80 and 0JLS080.V maintain Active product status and ROHS3 compliance, confirming suitability for current applications. The 0JLS080.V carries CE, CSA, QPL, and UL certifications, providing comprehensive regulatory approval coverage for industrial and electrical applications.

Selection between these parts should be based on:

• Availability and lead time requirements
• Existing inventory and supply chain preferences
• Specific voltage and current rating requirements for the application circuit
• Holder compatibility (the 0JLS080.V requires a Class J fuse holder)
• Packaging requirements (A4J80 supplied in Box; 0JLS080.V supplied in Bulk)

Frequently Asked Questions (FAQ)

Q: What makes 0JLS080.V a valid substitute for A4J80?

A: Both parts are Class J fuses with 200kA breaking capacity and fast-blow response characteristics. They share identical ECCN and HTSUS classifications and maintain ROHS3 compliance, meeting the core electrical and regulatory requirements for substitution.

Q: Are there any mechanical compatibility considerations?

A: The 0JLS080.V is a cartridge fuse requiring a Class J fuse holder. Verify that your application circuit includes an appropriate Class J holder before substitution. The A4J80 packaging details do not specify holder requirements in the provided data.

Q: What is the difference between Box and Bulk packaging?

A: Box packaging (A4J80) typically includes protective outer packaging suitable for direct shelf storage and component traceability. Bulk packaging (0JLS080.V) provides cost-effective quantities for high-volume manufacturing or assembly operations without individual protective cases.

Q: Can I use these parts interchangeably in my circuit?

A: Substitution is valid only if your circuit design accommodates Class J fuse holders and the specific voltage and current ratings of the selected part. Verify that the 80A, 600 VAC rating of the 0JLS080.V matches your application requirements before implementation.

Q: Are both parts currently available for procurement?

A: Both parts maintain Active product status. The A4J80 has 841 pieces in stock; the 0JLS080.V has 650 pieces in stock, confirming current availability from the specified suppliers.