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

Part Overview

The 2JS 5-R is a 5A slow-blow glass cartridge fuse manufactured by Bel Fuse Inc., rated for 350V AC and 140V DC operation. This component is designed for circuit protection in applications requiring reliable overcurrent interruption with controlled response characteristics. The part maintains active product status with 2681 units in current inventory stock.

Substitute parts are identified when equivalent electrical performance can be maintained across critical parameters including current rating, voltage ratings, response time classification, and mechanical form factor compatibility with standard 2AG fuse holders.

Substiute Parts

2JS 5-R

Bel Fuse Inc.In Stock: 27912JS 5-R Datasheet

Current PartRFQ

0209005.MXP

Littelfuse Inc.In Stock: 19950209005.MXP Datasheet

SimilarRFQ

0229005.MXP

Littelfuse Inc.In Stock: 41740229005.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 2JS 5-R is determined by strict alignment across the following critical parameters:

Primary Compatibility Criteria:

• Current Rating: Must equal 5 A
• Fuse Type: Must be Cartridge, Glass
• Package / Case: Must be 2AG form factor (5mm x 15mm mechanical envelope)
• Response Time: Must be Slow Blow classification
• Mounting Type: Must require standard holder compatibility

Voltage Rating Considerations: Substitute parts must maintain voltage ratings sufficient for the intended application. The 2JS 5-R operates at 350V AC / 140V DC. Substitute candidates are evaluated based on whether their voltage ratings meet or exceed application requirements.

Identified Substitute Parts:

1. 0209005.MXP (Littelfuse Inc., Series 209): Matches current rating, fuse type, package, and response time. Voltage rating of 350V AC is equivalent to main part AC rating. DC voltage rating not specified in substitute data.

2. 0229005.MXP (Littelfuse Inc., Series 229): Matches current rating, fuse type, package, and response time. Voltage rating of 125V AC / 125V DC is lower than main part ratings and represents a voltage-constrained substitute suitable only for applications operating within 125V AC/DC limits.

Parameter Comparison

Engineering Selection Recommendations

0209005.MXP Selection Basis: This Littelfuse substitute maintains electrical equivalence with the 2JS 5-R across current rating, AC voltage rating, fuse type, response classification, and 2AG package form factor. Both parts hold ROHS3 compliance and CE/PSE certifications. The 0209005.MXP is suitable for applications operating within 350V AC specifications. Inventory availability is 1972 units.

0229005.MXP Selection Basis: This Littelfuse substitute is electrically equivalent only for applications constrained to 125V AC / 125V DC operation. While it maintains the 5A current rating, Slow Blow response, 2AG package, and ROHS3 compliance, its reduced voltage rating restricts application scope. This part offers broader certification coverage (CSA, UL addition) and higher breaking capacity (400A). Inventory availability is 4096 units.

Compliance Alignment: Both substitute parts maintain ROHS3 compliance and REACH Unaffected status consistent with the main part. Certification differences exist: the 0209005.MXP lacks CSA certification present in the main part; the 0229005.MXP adds CSA and UL certifications not present in the main part.

Frequently Asked Questions (FAQ)

Q: Can 0209005.MXP directly replace 2JS 5-R in all applications? A: The 0209005.MXP matches the 2JS 5-R across current rating (5A), AC voltage rating (350V), fuse type (Cartridge, Glass), response time (Slow Blow), and 2AG package form factor. DC voltage rating for the 0209005.MXP is not specified in available data. Substitution is valid for applications operating within specified AC parameters.

Q: Why is 0229005.MXP listed as a substitute if its voltage rating is lower? A: The 0229005.MXP is included as a substitute for applications where the circuit operates at 125V AC / 125V DC or lower. It maintains all mechanical and electrical characteristics required for 2AG holder compatibility and 5A overcurrent protection at reduced voltage levels. It is not suitable for applications requiring 350V AC or 140V DC operation.

Q: Are all three fuses mechanically interchangeable? A: Yes. All three parts use the 2AG form factor (5mm x 15mm) and require standard 2AG fuse holders. Mechanical installation is identical across all three parts.

Q: What is the significance of the Melting I²t difference between parts? A: The 2JS 5-R has a Melting I²t value of 135, while both Littelfuse substitutes have a value of 267. This parameter indicates thermal energy required to melt the fuse element. The difference reflects different internal fuse element designs between manufacturers while maintaining the same 5A current rating and Slow Blow response classification.

Q: Which substitute has the best inventory availability? A: The 0229005.MXP has the highest inventory with 4096 units in stock, followed by 0209005.MXP with 1972 units. The main part 2JS 5-R has 2681 units available.

Q: Do all parts meet the same regulatory certifications? A: No. The 2JS 5-R holds CE, CSA, cURus, and PSE certifications. The 0209005.MXP holds CE, cULus, and PSE certifications (missing CSA). The 0229005.MXP holds CE, CSA, PSE, and UL certifications. Application requirements determine which certification set is necessary.