MJS 1.5 Equivalent & Substitute Parts

Part Overview

The MJS 1.5 is a 1.5 A 250 V AC/DC fuse cartridge manufactured by Bel Fuse Inc. in the 2AG glass form factor (5mm x 15mm axial). This component is classified as obsolete, which necessitates identification of active equivalent parts for continued system support and procurement.

Substiute Parts

MJS 1.5

Bel Fuse Inc.In Stock: 916MJS 1.5 Datasheet

Current PartRFQ

MJS 1.5-R

Bel Fuse Inc.In Stock: 740MJS 1.5-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MJS 1.5 is determined by strict equivalence across the following parameters:

• Current Rating: 1.5 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 2AG, 5mm x 15mm (Axial) (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity: 200 A (exact match required)
• Melting I²t: 14 (exact match required)

The MJS 1.5-R meets all substitution criteria as a direct equivalent from the same manufacturer with identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The MJS 1.5-R is the direct substitute for the obsolete MJS 1.5. Both parts share identical electrical and mechanical specifications across all critical parameters. The MJS 1.5-R maintains active product status with current manufacturing support from Bel Fuse Inc.

The MJS 1.5-R provides improved regulatory compliance with ROHS3 certification compared to the non-compliant MJS 1.5. Approval certifications include CE, CSA, cULus, and PSE. The lower DC cold resistance (0.096 Ohms versus 0.135 Ohms) represents a minor improvement in electrical characteristics while maintaining functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can the MJS 1.5-R be used as a direct replacement for the MJS 1.5?

A: Yes. The MJS 1.5-R is electrically and mechanically equivalent to the MJS 1.5 across all specified parameters including current rating, voltage rating, fuse type, package dimensions, response time, breaking capacity, and melting I²t value.

Q: What is the difference between MJS 1.5 and MJS 1.5-R?

A: The primary differences are product status (MJS 1.5 is obsolete; MJS 1.5-R is active), RoHS compliance (MJS 1.5-R is ROHS3 compliant), and DC cold resistance (0.096 Ohms for MJS 1.5-R versus 0.135 Ohms for MJS 1.5). Electrical and mechanical performance specifications are identical.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 2AG package form factor with dimensions of 5mm x 15mm (0.217" Dia x 0.591" L) and are mounted through hole.

Q: What certifications does the MJS 1.5-R carry?

A: The MJS 1.5-R holds CE, CSA, cULus, and PSE approvals.

Q: Is the MJS 1.5-R available in different packaging options?

A: The MJS 1.5-R is supplied in bulk packaging, whereas the MJS 1.5 was supplied with standard packaging.