2JS 500 Equivalent & Substitute Parts

Part Overview

The 2JS 500 is a slow-blow glass cartridge fuse rated at 500 mA with 350 V AC and 140 V DC voltage ratings. This component is classified as obsolete, requiring identification of active equivalent parts for continued system support and procurement. The 2AG form factor (5mm x 15mm) and slow-blow response characteristic define the functional requirements for direct substitution.

Substiute Parts

2JS 500

Bel Fuse Inc.In Stock: 11412JS 500 Datasheet

Current PartRFQ

2JS 500-R

Bel Fuse Inc.In Stock: 18602JS 500-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Direct substitution of the 2JS 500 is determined by equivalence across the following critical parameters:

• Current Rating: 500 mA (exact match required)
• Voltage Ratings: 350 V AC and 140 V DC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 2AG, 5mm x 15mm (exact match required)
• Breaking Capacity: 100A AC, 150A DC (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)

The 2JS 500-R meets all substitution criteria as a direct equivalent manufactured by Bel Fuse Inc. with active product status.

Parameter Comparison

Engineering Selection Recommendations

The 2JS 500-R is the direct active equivalent for the obsolete 2JS 500. Both parts share identical electrical and mechanical specifications across all critical parameters. The 2JS 500-R offers improved compliance status with ROHS3 certification and active product availability. The marginal differences in melting I²t (1.6 versus 1.55) and DC cold resistance (0.62 versus 0.84 Ohms) remain within acceptable tolerance for functional equivalence in slow-blow fuse applications.

Frequently Asked Questions (FAQ)

Q: Can the 2JS 500-R be used as a direct replacement for the 2JS 500?

A: Yes. The 2JS 500-R meets all electrical and mechanical specifications of the 2JS 500, including current rating, voltage ratings, response time, and package dimensions. Both require the same 2AG holder.

Q: What is the difference between the 2JS 500 and 2JS 500-R?

A: The primary differences are product status (obsolete versus active), RoHS compliance (non-compliant versus ROHS3 compliant), and minor variations in melting I²t and DC cold resistance. Electrical and mechanical performance characteristics are equivalent.

Q: Are there any compatibility concerns when substituting the 2JS 500-R for the 2JS 500?

A: No compatibility concerns exist. Both parts use the same 2AG form factor and mounting requirements. The 2JS 500-R is a direct functional equivalent.

Q: What certifications does the 2JS 500-R carry?

A: The 2JS 500-R holds CSA and cURus approvals. The original 2JS 500 carried CE, CSA, PSE, and UR certifications.