Equivalent & Substitute Parts for 2JS 1-R Glass Cartridge Fuse

Part Overview

The 2JS 1-R is a 1 A, 350 V AC / 140 V DC slow-blow glass cartridge fuse manufactured by Bel Fuse Inc. in the 2AG package format (5mm x 15mm). This component is actively produced and widely stocked. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring 2AG-format fuses with compatible electrical ratings.

Substiute Parts

2JS 1-R

Bel Fuse Inc.In Stock: 11422JS 1-R Datasheet

Current PartRFQ

0209001.MXP

Littelfuse Inc.In Stock: 27110209001.MXP Datasheet

SimilarRFQ

0229001.MXP

Littelfuse Inc.In Stock: 26360229001.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 2JS 1-R is determined by the following critical parameters:

• Current Rating: Must be 1 A
• Package Format: Must be 2AG (5mm x 15mm)
• Fuse Type: Must be Cartridge, Glass
• Response Time: Must be Slow Blow
• Voltage Ratings: AC voltage must be ≥ 350 V; DC voltage must be ≥ 140 V
• Mounting Type: Must require holder (standard for 2AG cartridge fuses)
• Operating Temperature Range: Must support -55°C ~ 125°C

Two substitute parts meet these criteria:

1. 0209001.MXP (Littelfuse Inc., Series 209): Matches current, package, fuse type, and response time. AC voltage rating of 350 V meets the requirement. DC voltage rating not specified in detailed description but listed as "350 V AC DC," indicating DC compatibility. Breaking capacity of 100A AC is equivalent to the main part.

2. 0229001.MXP (Littelfuse Inc., Series 229): Matches current, package, fuse type, and response time. AC voltage rating of 250 V is lower than the main part's 350 V AC requirement; DC voltage rating of 125 V is lower than the main part's 140 V DC requirement. This part is suitable only for applications with lower voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

0209001.MXP is the primary substitute for the 2JS 1-R. Both parts are active products with equivalent current ratings, package formats, and AC voltage specifications. The 0209001.MXP carries CE, cULus, and PSE certifications, providing broad regulatory coverage. The DC cold resistance differential (0.21 Ω vs. 0.19 Ω) is negligible for most applications. Both parts are ROHS3 compliant and REACH unaffected.

0229001.MXP is suitable only for applications with reduced voltage requirements (250 V AC maximum, 125 V DC maximum). This part should not be used as a direct substitute for the 2JS 1-R in circuits designed for 350 V AC / 140 V DC operation. The 0229001.MXP offers UL certification in addition to CE, CSA, and PSE approvals, and provides significantly higher DC breaking capacity (10kA vs. 150A DC).

All three parts are actively produced and maintain substantial inventory levels, supporting reliable procurement.

Frequently Asked Questions (FAQ)

Q: Can 0209001.MXP be used as a direct replacement for 2JS 1-R?

A: Yes. Both parts share identical current ratings (1 A), package format (2AG, 5mm x 15mm), response time (slow blow), and AC voltage rating (350 V). The DC cold resistance values are within acceptable tolerance for equivalent operation.

Q: What is the key difference between 0209001.MXP and 0229001.MXP?

A: The 0229001.MXP has lower voltage ratings (250 V AC / 125 V DC) compared to 0209001.MXP (350 V AC). The 0229001.MXP is not suitable for circuits requiring the full 350 V AC / 140 V DC rating of the 2JS 1-R.

Q: Are all three parts physically interchangeable?

A: Yes, all three parts use the 2AG package format (5mm x 15mm) and require the same holder. Physical installation is identical. However, electrical compatibility depends on circuit voltage specifications.

Q: Which certifications are most important for my application?

A: Certification requirements depend on your end-use application and regional regulations. The 2JS 1-R carries CE, CSA, cURus, and PSE approvals. The 0209001.MXP carries CE, cULus, and PSE. The 0229001.MXP carries CE, CSA, PSE, and UL. Verify that the selected part meets your specific regulatory requirements.

Q: What is the significance of the melting I²t value?

A: The melting I²t (5.93 for 2JS 1-R, 5.64 for both Littelfuse parts) indicates the thermal energy required to melt the fuse element. The slight difference between parts is within acceptable tolerance for equivalent slow-blow performance at 1 A.

Q: Can I use 0229001.MXP in a 350 V AC circuit?

A: No. The 0229001.MXP is rated for 250 V AC maximum. Using it in a 350 V AC circuit exceeds its voltage rating and creates a safety hazard.