2JS 2-R Glass Fuse Equivalent & Substitute Parts

Part Overview

The 2JS 2-R is a 2 A, 350 V AC / 140 V DC slow-blow glass fuse cartridge manufactured by Bel Fuse Inc. in the 2AG form factor (5mm x 15mm). This component is designed for circuit protection in applications requiring slow-blow response characteristics and is currently in active production status. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for this fuse category.

Substiute Parts

2JS 2-R

Bel Fuse Inc.In Stock: 9982JS 2-R Datasheet

Current PartRFQ

0209002.MXP

Littelfuse Inc.In Stock: 25350209002.MXP Datasheet

SimilarRFQ

0229002.MXP

Littelfuse Inc.In Stock: 23780229002.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Current Rating: Must be 2 A
• Fuse Type: Must be Cartridge, Glass
• Package / Case: Must be 2AG, 5mm x 15mm form factor
• Mounting Type: Must require holder
• Response Time: Must be Slow 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

Two substitute parts meet these criteria with the following considerations:

0209002.MXP (Littelfuse Inc., Series 209): Matches current rating, fuse type, package, mounting type, and response time. AC voltage rating is equivalent at 350 V. DC voltage rating is not specified in available data. Melting I²t differs (30 vs. 22.6).

0229002.MXP (Littelfuse Inc., Series 229): Matches current rating, fuse type, package, mounting type, and response time. AC voltage rating is 250 V (lower than main part). DC voltage rating is 125 V (lower than main part). Melting I²t differs (30 vs. 22.6). Breaking capacity specifications differ significantly.

Parameter Comparison

Engineering Selection Recommendations

0209002.MXP (Littelfuse Series 209): This part is suitable as a direct substitute where AC voltage requirements are 350 V and DC voltage specifications are not critical to the application. Both parts carry CE and PSE certifications. The 0209002.MXP lacks CSA and cURus certifications present on the 2JS 2-R. The higher melting I²t value (30 vs. 22.6) indicates a slightly slower thermal response. All three parts maintain ROHS3 compliance and equivalent operating temperature ranges.

0229002.MXP (Littelfuse Series 229): This part is suitable only for applications where voltage requirements do not exceed 250 V AC and 125 V DC. The 0229002.MXP provides broader certification coverage (CE, CSA, PSE, UL) compared to the main part. The significantly different breaking capacity specifications (35A AC, 10kA DC vs. 100A AC, 150A DC) indicate this part is designed for different fault current environments and should be selected only when application requirements align with these lower breaking capacity ratings.

Frequently Asked Questions (FAQ)

Q: Can 0209002.MXP be used as a direct replacement for 2JS 2-R in all applications?

A: 0209002.MXP matches the 2JS 2-R in current rating (2 A), AC voltage (350 V), fuse type, package, and response time. However, the DC voltage rating is not specified for 0209002.MXP. If your application requires 140 V DC protection, verify that 0209002.MXP meets this requirement with the manufacturer before substitution. Additionally, 0209002.MXP lacks CSA and cURus certifications; confirm these are not required for your application.

Q: What are the key differences between 0229002.MXP and the main part 2JS 2-R?

A: 0229002.MXP has lower voltage ratings (250 V AC vs. 350 V AC; 125 V DC vs. 140 V DC) and significantly lower breaking capacity (35A AC, 10kA DC vs. 100A AC, 150A DC). These differences indicate the 0229002.MXP is designed for lower-voltage and lower-fault-current applications. Use 0229002.MXP only when your circuit operates within these lower voltage and breaking capacity limits.

Q: Are all three fuses compatible with the same holder?

A: Yes. All three parts use the 2AG form factor (5mm x 15mm) and require a holder. They are mechanically interchangeable in terms of physical fit. However, electrical compatibility depends on the holder's voltage and current ratings matching the fuse specifications.

Q: What does the melting I²t value indicate, and why does it differ between parts?

A: Melting I²t is a thermal characteristic that indicates the energy required to melt the fuse element. The 2JS 2-R has a melting I²t of 22.6, while both Littelfuse substitutes have 30. A higher I²t value means the fuse responds more slowly to thermal stress. Verify that the substitute's thermal response is acceptable for your application's inrush current and transient protection requirements.

Q: Do all parts meet the same regulatory certifications?

A: No. The 2JS 2-R carries CE, CSA, cURus, and PSE certifications. The 0209002.MXP carries CE, cULus, and PSE certifications (missing CSA and cURus). The 0229002.MXP carries CE, CSA, PSE, and UL certifications (missing cURus). Confirm that the substitute part's certification set meets your application and regional requirements before selection.