2JQ 2.5-R Equivalent & Substitute Parts

Part Overview

The 2JQ 2.5-R is a 2.5 A fast-blow glass cartridge fuse manufactured by Bel Fuse Inc., rated for 350 V AC and 140 V DC operation. This component is designed for applications requiring reliable overcurrent protection in industrial and electronic equipment. The fuse operates within a temperature range of -55°C to 125°C and is housed in a standard 2AG package (5mm x 15mm). The part maintains active product status with full compliance to CE, CSA, cURus, and PSE approval agencies. Equivalent substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory constraints require component flexibility.

Substiute Parts

2JQ 2.5-R

Bel Fuse Inc.In Stock: 27292JQ 2.5-R Datasheet

Current PartRFQ

022502.5MXP

Littelfuse Inc.In Stock: 1600022502.5MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 2JQ 2.5-R are identified based on the following critical parameters that determine functional equivalence:

• Current Rating: Must be 2.5 A to maintain identical overcurrent protection characteristics
• Fuse Type: Must be Cartridge, Glass to ensure mechanical and electrical compatibility
• Package / Case: Must be 2AG, 5mm x 15mm to fit existing holder assemblies without modification
• Response Time: Must be Fast Blow to match circuit protection response characteristics
• Operating Temperature Range: Must support -55°C ~ 125°C operational envelope
• Voltage Ratings: AC and DC voltage ratings must meet or exceed the application requirements

The substitute part 022502.5MXP from Littelfuse Inc. meets all critical substitution criteria. While this part exhibits lower AC voltage rating (250 V versus 350 V) and lower DC voltage rating (125 V versus 140 V), it remains suitable for applications operating within its rated voltage envelope. The substitute maintains identical current rating, fuse type, package specification, response time, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Both the 2JQ 2.5-R and 022502.5MXP maintain active product status and comply with major international approval standards. The primary selection criterion is application voltage requirement. The 2JQ 2.5-R is suitable for circuits operating at 350 V AC or 140 V DC. The 022502.5MXP is suitable for circuits operating at 250 V AC or 125 V DC.

Selection of the substitute part 022502.5MXP is appropriate when the application voltage does not exceed 250 V AC or 125 V DC. Both parts carry equivalent regulatory approvals (CE, CSA, PSE) with the substitute offering additional UL certification. The substitute exhibits superior DC breaking capacity (10kA versus 150A) and maintains compliance with RoHS3 requirements.

Frequently Asked Questions (FAQ)

Q: Can the 022502.5MXP substitute for the 2JQ 2.5-R in all applications?

A: The 022502.5MXP is suitable only for applications where the circuit voltage does not exceed 250 V AC or 125 V DC. Applications requiring higher voltage ratings must use the 2JQ 2.5-R or equivalent parts rated for 350 V AC / 140 V DC.

Q: Are both parts mechanically compatible with the same fuse holder?

A: Yes. Both parts use the 2AG package specification (5mm x 15mm) and require the same 2AG fuse holder. No mechanical modification is necessary for substitution.

Q: What is the difference in melting I²t between these parts?

A: The 2JQ 2.5-R has a melting I²t of 4, while the 022502.5MXP has a melting I²t of 2.68. This indicates the 022502.5MXP will melt faster under identical overcurrent conditions. Applications with specific I²t requirements must verify compatibility before substitution.

Q: Do both parts meet the same regulatory standards?

A: Both parts comply with CE, CSA, and PSE standards. The 022502.5MXP additionally carries UL certification. Both are ROHS3 compliant and REACH unaffected.

Q: What is the significance of the DC cold resistance difference?

A: The 2JQ 2.5-R has 0.031 Ohms DC cold resistance, while the 022502.5MXP has 0.0372 Ohms. This minor difference may affect circuit behavior in low-voltage, high-current applications. Verify circuit performance if substituting in sensitive applications.