Equivalent & Substitute Parts for 2JS 7

Part Overview

The 2JS 7 is a 7 A slow-blow glass cartridge fuse rated for 350 V AC and 140 V DC operation, manufactured by Bel Fuse Inc. in the 2AG form factor (5mm x 15mm). This component is classified as obsolete, making identification of active equivalent parts essential for ongoing system maintenance and component procurement.

The primary reason for identifying substitute parts is the obsolete status of the original 2JS 7. Active alternatives ensure continued availability and support for applications requiring this fuse specification.

Substiute Parts

2JS 7

Bel Fuse Inc.In Stock: 9722JS 7 Datasheet

Current PartRFQ

2JS 7-R

Bel Fuse Inc.In Stock: 17972JS 7-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2JS 7 is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 7 A
• Voltage Rating: 350 V AC / 140 V DC
• Fuse Type: Cartridge, Glass
• Package / Case: 2AG, 5mm x 15mm
• Response Time: Slow Blow
• Breaking Capacity: 100 A AC, 150 A DC
• Melting I²t: 263
• DC Cold Resistance: 0.012 Ohms
• Operating Temperature: -55°C ~ 125°C

The 2JS 7-R meets all these criteria and is manufactured by the same supplier (Bel Fuse Inc.), ensuring direct functional and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 2JS 7-R is the direct active equivalent for the obsolete 2JS 7. Both parts are manufactured by Bel Fuse Inc. and share identical electrical and mechanical specifications across all critical parameters.

The 2JS 7-R offers the following advantages:

• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance provides environmental and regulatory alignment with current manufacturing standards
• Identical electrical performance: 7 A current rating, 350 V AC / 140 V DC voltage ratings, slow-blow response, and 263 melting I²t
• Identical mechanical compatibility: 2AG form factor, 5mm x 15mm dimensions, and holder-based mounting
• Equivalent certifications: CE, CSA, cURus, PSE approval agencies

For applications currently using the 2JS 7, direct substitution with the 2JS 7-R is appropriate without circuit redesign or system modification.

Frequently Asked Questions (FAQ)

Q: Can the 2JS 7-R be used as a direct replacement for the 2JS 7?

A: Yes. The 2JS 7-R is electrically and mechanically identical to the 2JS 7 across all specified parameters, including current rating, voltage ratings, response time, breaking capacity, and physical dimensions. No circuit modifications are required.

Q: What is the difference between the 2JS 7 and 2JS 7-R?

A: The primary differences are product status and compliance. The 2JS 7 is obsolete and RoHS non-compliant, while the 2JS 7-R is active and ROHS3 compliant. All electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts?

A: The 2JS 7 is supplied in standard packaging, while the 2JS 7-R is supplied in bulk packaging. Both use the identical 2AG, 5mm x 15mm form factor and are compatible with the same fuse holders.

Q: What certifications apply to the 2JS 7-R?

A: The 2JS 7-R carries CE, CSA, cURus, and PSE approvals, meeting international safety and regulatory standards for fuse components.

Q: Is the 2JS 7-R suitable for both AC and DC applications?

A: Yes. The 2JS 7-R is rated for 350 V AC and 140 V DC operation, with a breaking capacity of 100 A AC and 150 A DC at rated voltage.