Equivalent & Substitute Parts for 3JQ 2.5-R

Part Overview

The 3JQ 2.5-R is a fast-blow glass cartridge fuse manufactured by Bel Fuse Inc., rated at 2.5 A with 350 V AC and 140 V DC voltage ratings. This fuse is designed for through-hole mounting in 2AG package format (5mm x 15mm axial configuration). The product maintains active status and is widely used in industrial and consumer electronics applications requiring overcurrent protection. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the allowed parameter tolerances for this fuse category.

Substiute Parts

3JQ 2.5-R

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

Current PartRFQ

022402.5MXP

LittelfuseIn Stock: 1766022402.5MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3JQ 2.5-R is determined by the following critical parameters:

• Current Rating: Must be 2.5 A
• Package / Case: Must be 2AG, 5mm x 15mm (Axial) for mechanical compatibility
• Fuse Type: Must be Cartridge, Glass
• Response Time: Must be Fast Blow
• Mounting Type: Must be Through Hole
• Operating Temperature Range: Must support -55°C ~ 125°C minimum
• RoHS Compliance: Must maintain ROHS3 Compliant status

The substitute part 022402.5MXP (Littelfuse 224 series) meets all mechanical and electrical compatibility criteria. While voltage ratings differ (250 V AC / 125 V DC versus 350 V AC / 140 V DC), the substitute part operates within acceptable parameters for applications where the lower voltage rating is sufficient. Both parts share identical current ratings, package dimensions, response characteristics, and temperature operating ranges.

Parameter Comparison

Engineering Selection Recommendations

The 3JQ 2.5-R maintains active product status with full regulatory compliance across CE, CSA, cURus, and PSE certifications. The substitute part 022402.5MXP is also active and carries CE, CSA, PSE, and UL certifications, providing equivalent compliance coverage for most applications.

Selection between these parts depends on circuit voltage requirements. The 3JQ 2.5-R is suitable for applications operating at or below 350 V AC / 140 V DC. The 022402.5MXP is suitable for applications operating at or below 250 V AC / 125 V DC. Both parts are mechanically and electrically compatible within their respective voltage ratings and share identical current ratings and thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 022402.5MXP replace the 3JQ 2.5-R in all applications?

A: The 022402.5MXP can replace the 3JQ 2.5-R only in applications where the circuit voltage does not exceed 250 V AC or 125 V DC. Both parts share identical current ratings, package dimensions, and response characteristics. If your application operates above these voltage thresholds, the 3JQ 2.5-R is required.

Q: Are the physical dimensions identical between these parts?

A: Both parts use the 2AG package format with nominal dimensions of 5mm x 15mm (Axial). The 3JQ 2.5-R has a specified diameter of 0.217" (5.50mm) and length of 0.591" (15.00mm). The 022402.5MXP has a specified diameter of 0.185" (4.70mm) and length of 0.570" (14.48mm). These minor dimensional variations remain within 2AG package tolerance and do not affect mechanical compatibility in standard through-hole fuse holders.

Q: What is the difference in breaking capacity between these parts?

A: The 3JQ 2.5-R has a breaking capacity of 100A AC and 150A DC at rated voltage. The 022402.5MXP has a breaking capacity of 100A AC and 10kA DC at rated voltage. Both parts meet standard fuse performance requirements for their respective voltage ratings.

Q: Do both parts carry the same regulatory certifications?

A: Both parts carry CE, CSA, and PSE certifications. The 3JQ 2.5-R additionally carries cURus certification, while the 022402.5MXP carries UL certification. Both certification sets are recognized for industrial and consumer electronics applications.

Q: What is the melting I²t specification and why does it differ?

A: The 3JQ 2.5-R has a melting I²t of 4, while the 022402.5MXP has a melting I²t of 2.68. This parameter indicates the thermal energy required to melt the fuse element. The difference reflects the distinct thermal characteristics of each manufacturer's fuse design. Both values are appropriate for 2.5 A fast-blow fuses and do not affect substitution compatibility when voltage ratings are observed.