3JQ 5 Equivalent & Substitute Parts

Part Overview

The 3JQ 5 is a fast-blow glass cartridge fuse rated at 5 A, 350 V AC, and 140 V DC, designed for through-hole mounting in 2AG package format (5mm x 15mm axial). This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and repair applications. The substitute part 3JQ 5-R provides electrical and mechanical equivalence while maintaining active product status and improved compliance characteristics.

Substiute Parts

3JQ 5

Bel Fuse Inc.In Stock: 6523JQ 5 Datasheet

Current PartRFQ

3JQ 5-R

Bel Fuse Inc.In Stock: 10193JQ 5-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3JQ 5 is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 5 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: 100 A AC, 150 A DC (exact match required)
• Melting I²t: 20 (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The substitute part 3JQ 5-R meets all these criteria and is therefore electrically and mechanically interchangeable with the 3JQ 5.

Parameter Comparison

Engineering Selection Recommendations

The 3JQ 5-R is the direct substitute for the obsolete 3JQ 5. Both parts are manufactured by Bel Fuse Inc. and carry identical electrical and mechanical specifications. The 3JQ 5-R offers the following advantages:

• Active product status ensures continued availability and supply chain reliability
• ROHS3 compliance versus non-compliant status of the main part
• Marginally lower DC cold resistance (0.015 Ohms vs. 0.016 Ohms), which is within normal manufacturing tolerance variation
• Identical approval certifications (CE, CSA, cURus, PSE)

Selection of the 3JQ 5-R is appropriate for all applications previously served by the 3JQ 5, with no functional or performance trade-offs.

Frequently Asked Questions (FAQ)

Q: Can the 3JQ 5-R be used as a direct replacement for the 3JQ 5?

A: Yes. The 3JQ 5-R is electrically and mechanically equivalent to the 3JQ 5 across all critical parameters: current rating, voltage ratings (AC and DC), fuse type, response time, package format, mounting type, breaking capacity, and operating temperature range. Physical dimensions and footprint are identical.

Q: What is the difference in DC cold resistance between the two parts?

A: The 3JQ 5 has a DC cold resistance of 0.016 Ohms, while the 3JQ 5-R measures 0.015 Ohms. This 0.001 Ohm difference falls within normal manufacturing tolerance and does not affect functional performance or circuit behavior.

Q: Why is the 3JQ 5 listed as obsolete?

A: The 3JQ 5 has reached end-of-life status. The 3JQ 5-R remains in active production and is the recommended source for new procurement and replacement applications.

Q: Are there compliance differences between the two parts?

A: Both parts carry identical international approvals (CE, CSA, cURus, PSE). The 3JQ 5-R is ROHS3 compliant, while the 3JQ 5 is non-compliant. For applications subject to RoHS requirements, the 3JQ 5-R is the appropriate selection.

Q: Is the 2AG package format the same for both parts?

A: Yes. Both the 3JQ 5 and 3JQ 5-R use the 2AG package format with identical dimensions of 5mm x 15mm (axial). They are mechanically interchangeable in all through-hole mounting applications.