2JS 2 Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The 2JS 2 is a slow-blow glass cartridge fuse manufactured by Bel Fuse Inc., rated for 2 A at 350 V AC and 140 V DC. This component is designed for applications requiring overcurrent protection in AC and DC circuits with moderate breaking capacity requirements. The main part (2JS 2) carries an obsolete product status, making identification of active equivalent parts essential for ongoing system support and component procurement.

Substiute Parts

2JS 2

Bel Fuse Inc.In Stock: 10182JS 2 Datasheet

Current PartRFQ

2JS 2-R

Bel Fuse Inc.In Stock: 9982JS 2-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Current Rating: 2 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: 100 A AC, 150 A DC (exact match required)
• Melting I²t: 22.6 (exact match required)

The substitute part 2JS 2-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 2-R is the direct active equivalent for the obsolete 2JS 2. Both parts share identical electrical ratings, mechanical dimensions, and thermal characteristics. The 2JS 2-R carries active product status and is currently in stock, making it the appropriate selection for new designs and component replacement in existing systems.

The 2JS 2-R provides improved regulatory compliance, meeting ROHS3 requirements compared to the non-compliant status of the original 2JS 2. Certification coverage remains equivalent across both parts (CE, CSA, PSE), with the 2JS 2-R additionally carrying cURus approval.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts are identical in current rating (2 A), voltage ratings (350 V AC, 140 V DC), fuse type (cartridge, glass), package dimensions (2AG, 5mm x 15mm), response time (slow blow), and breaking capacity. No circuit modifications are required.

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

A: The primary differences are product status (2JS 2 is obsolete; 2JS 2-R is active) and regulatory compliance (2JS 2-R meets ROHS3 requirements). Electrical and mechanical specifications are identical.

Q: Does the 2JS 2-R require the same holder as the 2JS 2?

A: Yes. Both parts use the 2AG package format and require a compatible 2AG fuse holder for installation.

Q: Are there any temperature or environmental differences between these parts?

A: No. Both parts operate across the same temperature range (-55°C ~ 125°C) and share identical thermal and environmental specifications.

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

A: The 2JS 2-R carries CE, CSA, cURus, and PSE approvals, providing coverage for North American, European, and international markets.