2JS 5 Equivalent & Substitute Parts

Part Overview

The 2JS 5 is a 5 A, 350 V AC / 140 V DC slow-blow glass cartridge fuse in 2AG package format (5mm x 15mm) manufactured by Bel Fuse Inc. This fuse is designed for circuit protection in applications requiring moderate current ratings with extended response time characteristics. The main part (2JS 5) is classified as obsolete, making identification of active equivalent parts essential for ongoing system maintenance and component procurement.

Substiute Parts

2JS 5

Bel Fuse Inc.In Stock: 7432JS 5 Datasheet

Current PartRFQ

2JS 5-R

Bel Fuse Inc.In Stock: 27912JS 5-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2JS 5 is determined by strict equivalence across the following critical parameters:

• Current Rating: 5 A (exact match required)
• Voltage Rating - AC: 350 V (exact match required)
• Voltage Rating - DC: 140 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 2AG, 5mm x 15mm (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 100A AC, 150A DC (exact match required)
• Melting I²t: 135 (exact match required)

The substitute part 2JS 5-R meets all these criteria and is manufactured by the same supplier (Bel Fuse Inc.), ensuring mechanical and electrical compatibility. The primary distinction is product status: 2JS 5-R is active and available in bulk packaging, whereas 2JS 5 is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The 2JS 5-R is the direct active equivalent for the obsolete 2JS 5. Selection of 2JS 5-R is based on:

• Identical electrical and mechanical specifications across all critical parameters
• Active product status with confirmed inventory availability
• ROHS3 compliance of the substitute part, addressing regulatory requirements not met by the obsolete main part
• Maintained approval certifications (CE, CSA, cURus, PSE) ensuring continued compliance in regulated applications
• Improved DC cold resistance (0.019 Ohms vs. 0.022 Ohms) in the substitute part

For applications currently using 2JS 5, transition to 2JS 5-R is direct without circuit modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can 2JS 5-R be used as a direct replacement for 2JS 5?

A: Yes. Both parts are identical in current rating (5 A), voltage ratings (350 V AC / 140 V DC), fuse type (cartridge, glass), package format (2AG, 5mm x 15mm), response time (slow blow), and breaking capacity. The 2JS 5-R is the active equivalent.

Q: What is the difference between 2JS 5 and 2JS 5-R?

A: The primary differences are product status (2JS 5 is obsolete; 2JS 5-R is active), RoHS compliance (2JS 5-R is ROHS3 compliant), and DC cold resistance (2JS 5-R: 0.019 Ohms; 2JS 5: 0.022 Ohms). All electrical and mechanical protection characteristics are identical.

Q: Are there packaging differences between these parts?

A: The main part (2JS 5) is supplied in standard packaging, while the substitute (2JS 5-R) is available in bulk packaging. Both use the same 2AG, 5mm x 15mm physical format and are mechanically interchangeable.

Q: Does the improved RoHS compliance of 2JS 5-R affect circuit performance?

A: No. RoHS compliance is a material composition specification and does not alter electrical performance, voltage ratings, current ratings, or response characteristics. The fuse operates identically in circuit.

Q: What approval certifications apply to 2JS 5-R?

A: The substitute part carries CE, CSA, cURus, and PSE certifications, maintaining regulatory compliance for protected applications.