Equivalent & Substitute Parts for 3JQ 2.5

Part Overview

The 3JQ 2.5 is a 2.5 A fast-blow glass cartridge fuse rated for 350 V AC and 140 V DC operation. Manufactured by Bel Fuse Inc., this through-hole component is housed in a 2AG package with dimensions of 5mm x 15mm (axial). The main part number 3JQ 2.5 is currently listed as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where this fuse type is specified.

Substiute Parts

3JQ 2.5

Bel Fuse Inc.In Stock: 8543JQ 2.5 Datasheet

Current PartRFQ

3JQ 2.5-R

Bel Fuse Inc.In Stock: 7913JQ 2.5-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3JQ 2.5 fuse is determined by strict equivalence across the following critical parameters:

• Current Rating: 2.5 A (exact match required)
• Voltage Ratings: 350 V AC and 140 V DC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 2AG, 5mm x 15mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity: 100A AC, 150A DC (exact match required)
• Melting I²t: 4 (exact match required)
• Approval Agencies: CE, CSA, cURus, PSE (exact match required)

The substitute part 3JQ 2.5-R meets all these criteria and is therefore electrically and mechanically interchangeable with the main part number.

Parameter Comparison

Engineering Selection Recommendations

The 3JQ 2.5-R is the direct substitute for the obsolete 3JQ 2.5. Both parts are manufactured by Bel Fuse Inc. and share identical electrical and mechanical specifications. The 3JQ 2.5-R is currently in active production status, ensuring availability for new designs and replacement applications.

The 3JQ 2.5-R offers improved compliance status: it is ROHS3 compliant, whereas the original 3JQ 2.5 is RoHS non-compliant. This makes the 3JQ 2.5-R the preferred choice for applications subject to RoHS regulations. Both parts maintain equivalent regulatory approvals (CE, CSA, cURus, PSE) and identical performance characteristics across all critical parameters.

Frequently Asked Questions (FAQ)

Q: Can the 3JQ 2.5-R be used as a direct replacement for the 3JQ 2.5?

A: Yes. The 3JQ 2.5-R is electrically and mechanically equivalent to the 3JQ 2.5. Both parts have identical current ratings (2.5 A), voltage ratings (350 V AC, 140 V DC), fuse type (cartridge, glass), response time (fast blow), package dimensions (2AG, 5mm x 15mm), and breaking capacity (100A AC, 150A DC). No circuit modifications are required.

Q: What is the difference between the 3JQ 2.5 and 3JQ 2.5-R?

A: The primary differences are product status and RoHS compliance. The 3JQ 2.5 is obsolete and RoHS non-compliant, while the 3JQ 2.5-R is active production and ROHS3 compliant. DC cold resistance differs slightly (0.034 Ohms vs. 0.033 Ohms), but this variance is within acceptable tolerance for fuse applications.

Q: Are there any packaging differences between these parts?

A: The 3JQ 2.5 is supplied in standard packaging, while the 3JQ 2.5-R is supplied in bulk packaging. Both parts use the identical 2AG, 5mm x 15mm (axial) case format and are mounted through-hole.

Q: Which regulatory approvals do these fuses carry?

A: Both the 3JQ 2.5 and 3JQ 2.5-R carry CE, CSA, cURus, and PSE approvals, ensuring compliance with international safety standards.

Q: What is the operating temperature range for these fuses?

A: Both parts operate across the temperature range of -55°C to 125°C, suitable for industrial and commercial applications.