3JQ 2 Equivalent & Substitute Parts

Part Overview

The 3JQ 2 is a 2A fast-blow glass fuse cartridge rated for 350V AC and 140V DC operation, designed for through-hole mounting in 2AG form factor (5mm x 15mm axial). This component is classified as obsolete, making identification of active equivalent parts essential for ongoing system support and procurement planning. The substitute part 3JQ 2-R provides functional equivalence with improved compliance status and active availability.

Substiute Parts

3JQ 2

Bel Fuse Inc.In Stock: 7363JQ 2 Datasheet

Current PartRFQ

3JQ 2-R

Bel Fuse Inc.In Stock: 13503JQ 2-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3JQ 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)
• 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 @ Rated Voltage: 100A AC, 150A DC (exact match required)
• Melting I²t: 2.3 (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The 3JQ 2-R meets all substitution criteria and is the direct equivalent part from Bel Fuse Inc.

Parameter Comparison

Engineering Selection Recommendations

The 3JQ 2-R is the direct functional equivalent to the obsolete 3JQ 2. Both parts maintain identical electrical ratings, breaking capacity, thermal characteristics, and mechanical form factor. The 3JQ 2-R is classified as active product status with improved RoHS3 compliance, whereas the 3JQ 2 is obsolete and RoHS non-compliant. Both parts carry equivalent international approvals (CE, CSA, cURus, PSE). The marginal difference in DC cold resistance (0.041 Ohms vs. 0.044 Ohms) is within normal manufacturing tolerance and does not affect functional equivalence. For new designs and ongoing procurement, the 3JQ 2-R is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the 3JQ 2-R be used as a direct replacement for the 3JQ 2?

A: Yes. The 3JQ 2-R is electrically and mechanically equivalent to the 3JQ 2 across all specified parameters including current rating, voltage ratings, response time, package form factor, and breaking capacity.

Q: What is the difference between the 3JQ 2 and 3JQ 2-R?

A: The primary differences are product status and compliance. The 3JQ 2 is obsolete and RoHS non-compliant, while the 3JQ 2-R is active and ROHS3 compliant. DC cold resistance differs marginally (0.044 Ohms vs. 0.041 Ohms), which is within normal manufacturing tolerance.

Q: Are there any packaging differences between these parts?

A: The 3JQ 2 is supplied in standard packaging, while the 3JQ 2-R is supplied in bulk packaging. Both maintain identical mechanical dimensions and form factor (2AG, 5mm x 15mm axial).

Q: What certifications apply to both parts?

A: Both the 3JQ 2 and 3JQ 2-R carry CE, CSA, cURus, and PSE approvals.

Q: Why is RoHS compliance important for this substitution?

A: RoHS3 compliance of the 3JQ 2-R ensures conformance to current environmental and material restriction regulations, making it suitable for applications requiring regulatory compliance documentation.