2JQ 5-R Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The 2JQ 5-R is a 5 A fast-blow glass cartridge fuse manufactured by Bel Fuse Inc., rated for 350 V AC and 140 V DC operation. This fuse is designed for applications requiring reliable overcurrent protection in industrial and commercial equipment. The part is currently active in production with 1866 units in stock. Equivalent and substitute parts are identified for applications where component availability, inventory levels, or specific voltage requirements necessitate alternative sourcing options.

Substiute Parts

2JQ 5-R

Bel Fuse Inc.In Stock: 19472JQ 5-R Datasheet

Current PartRFQ

0208005.MXP

Littelfuse Inc.In Stock: 21500208005.MXP Datasheet

SimilarRFQ

0225005.MXUP

Littelfuse Inc.In Stock: 17050225005.MXUP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 2JQ 5-R is determined by the following critical parameters:

• Current Rating: Must be 5 A
• Fuse Type: Must be Cartridge, Glass
• Package / Case: Must be 2AG, 5mm x 15mm
• Response Time: Must be Fast Blow
• Voltage Rating - AC: Must support minimum 350 V AC
• Voltage Rating - DC: Must support minimum 140 V DC (where applicable)
• Operating Temperature Range: Must encompass -55°C ~ 125°C
• Mounting Type: Must require holder (non-surface mount)

The identified substitute parts meet the core electrical and mechanical compatibility requirements. Variations in secondary parameters such as melting I²t, breaking capacity, and dimensional tolerances remain within acceptable engineering margins for direct substitution in the specified application category.

Parameter Comparison

Engineering Selection Recommendations

0208005.MXP (Littelfuse Inc.) is a direct substitute for the 2JQ 5-R in applications operating at 350 V AC. Both parts share identical current rating, fuse type, package configuration, and response time characteristics. The 0208005.MXP maintains ROHS3 compliance and holds CE, cURus, and PSE certifications. This part is suitable for replacement in circuits where 350 V AC operation is required and DC voltage rating is not a critical specification.

0225005.MXUP (Littelfuse Inc.) is applicable only in applications operating at 125 V AC or lower. This part is not suitable as a substitute for the 2JQ 5-R in circuits requiring 350 V AC operation. The 0225005.MXUP is rated for 125 V AC maximum and does not meet the voltage requirements of the primary part. This part holds CE, CSA, and UL certifications and maintains ROHS3 compliance.

Selection between the main part and 0208005.MXP should be based on inventory availability and supply chain requirements, as both parts are functionally equivalent for 350 V AC applications. The 0225005.MXUP should be selected only when circuit voltage requirements are 125 V AC or lower.

Frequently Asked Questions (FAQ)

Q: Can the 0208005.MXP replace the 2JQ 5-R in all applications?

A: The 0208005.MXP is suitable for replacement in applications operating at 350 V AC. Both parts have identical current ratings (5 A), fuse type (cartridge, glass), package configuration (2AG), and response time (fast blow). The primary difference is that the 0208005.MXP does not specify a DC voltage rating, whereas the 2JQ 5-R is rated for 140 V DC. For applications requiring DC voltage protection, verify that the 0208005.MXP meets your circuit requirements.

Q: Why is the 0225005.MXUP listed as a substitute if it has a lower voltage rating?

A: The 0225005.MXUP is listed as a substitute for applications operating at 125 V AC or lower. It is not a substitute for the 2JQ 5-R in circuits requiring 350 V AC operation. The voltage rating is a critical parameter that determines substitution eligibility. Use the 0225005.MXUP only when your circuit voltage does not exceed 125 V AC.

Q: Are there dimensional differences between these parts?

A: All three parts use the 2AG package configuration (5mm x 15mm). Minor dimensional variations exist: the 2JQ 5-R measures 0.201" Dia x 0.543" L, the 0208005.MXP measures 0.185" Dia x 0.570" L, and the 0225005.MXUP measures 0.177" Dia x 0.570" L. These variations remain within the 2AG standard and do not affect holder compatibility.

Q: What is the difference in melting I²t between the main part and substitutes?

A: The 2JQ 5-R has a melting I²t of 20, while both Littelfuse substitutes (0208005.MXP and 0225005.MXUP) have a melting I²t of 17. This difference indicates slightly faster thermal response in the Littelfuse parts. For applications with strict thermal protection requirements, verify that the lower I²t value is acceptable for your circuit design.

Q: Which certifications apply to each part?

A: The 2JQ 5-R holds CE, CSA, cURus, and PSE certifications. The 0208005.MXP holds CE, cURus, and PSE certifications (no CSA). The 0225005.MXUP holds CE, CSA, and UL certifications (no cURus). Verify that the required certifications for your application are present on the selected part.

Q: What is the DC cold resistance difference, and does it matter?

A: The 2JQ 5-R has a DC cold resistance of 0.015 Ohms, while both Littelfuse substitutes have 0.0186 Ohms. This difference is minimal and reflects normal manufacturing variation between manufacturers. For most applications, this difference does not affect circuit performance.