Equivalent & Substitute Parts for 2JS 4.6

Part Overview

The 2JS 4.6 is a 4.6 A slow-blow glass cartridge fuse rated for 350 V AC and 140 V DC operation. Manufactured by Bel Fuse Inc., this component is designed for applications requiring reliable overcurrent protection in the 2AG form factor (5mm x 15mm). The main part number 2JS 4.6 has reached obsolete status, necessitating identification of active equivalent alternatives to maintain supply chain continuity and ensure design compatibility in existing and new applications.

Substiute Parts

2JS 3.5

Bel Fuse Inc.In Stock: 8762JS 3.5 Datasheet

Current PartRFQ

2JS 3.5-R

Bel Fuse Inc.In Stock: 28492JS 3.5-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2JS 4.6 is determined by strict equivalence across the following critical parameters:

• Current Rating: 4.6 A (exact match required)
• Voltage Ratings: 350 V AC and 140 V DC (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 2AG, 5mm x 15mm (exact match required)
• Breaking Capacity: 100A AC, 150A DC (exact match required)
• Melting I²t: 69 (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The substitute part 2JS 4.6-R meets all these criteria and is manufactured by the same supplier, ensuring functional and mechanical compatibility with applications originally designed for the 2JS 4.6.

Parameter Comparison

Engineering Selection Recommendations

The 2JS 4.6-R is the direct active equivalent for the obsolete 2JS 4.6. Both parts maintain identical electrical and mechanical specifications across all critical parameters including current rating, voltage ratings, response time, package form factor, and breaking capacity.

The 2JS 4.6-R offers improved compliance status: it is ROHS3 compliant compared to the non-compliant status of the original part, and includes cURus certification in addition to CE, CSA, and PSE approvals. The lower DC cold resistance (0.029 Ohms versus 0.037 Ohms) represents a minor improvement in electrical characteristics that does not affect functional compatibility.

For new designs and replacement applications, the 2JS 4.6-R is the appropriate selection due to its active product status and enhanced regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 2JS 4.6-R be used as a direct replacement for the 2JS 4.6?

A: Yes. The 2JS 4.6-R is functionally and mechanically equivalent to the 2JS 4.6 across all critical electrical parameters: current rating, voltage ratings, response time, package dimensions, breaking capacity, and melting I²t value. Both parts require the same 2AG holder and are pin-compatible.

Q: What is the difference in DC cold resistance between these parts?

A: The 2JS 4.6-R has a DC cold resistance of 0.029 Ohms compared to 0.037 Ohms for the 2JS 4.6. This difference does not affect functional performance or circuit compatibility.

Q: Are there compliance differences between the two parts?

A: The 2JS 4.6-R is ROHS3 compliant, while the 2JS 4.6 is RoHS non-compliant. The 2JS 4.6-R also includes cURus certification. Both parts maintain CE, CSA, and PSE approvals. For applications subject to RoHS requirements, the 2JS 4.6-R is the required selection.

Q: What holder is required for the 2JS 4.6-R?

A: The 2JS 4.6-R requires a 2AG holder, identical to the 2JS 4.6. The 5mm x 15mm form factor is standard across both parts.

Q: Is the 2JS 4.6-R available in different packaging options?

A: The 2JS 4.6-R is available in bulk packaging. The original 2JS 4.6 packaging specification was not provided in the available data.