Equivalent & Substitute Parts for 3JS 1.5

Part Overview

The 3JS 1.5 is a 1.5 A slow-blow glass cartridge fuse rated for 350 V AC and 140 V DC operation. Manufactured by Bel Fuse Inc., this through-hole component features a 2AG form factor with dimensions of 5mm x 15mm (axial). The main part number 3JS 1.5 is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and component replacement.

Substiute Parts

3JS 1.5

Bel Fuse Inc.In Stock: 9383JS 1.5 Datasheet

Current PartRFQ

3JS 1.5-R

Bel Fuse Inc.In Stock: 16613JS 1.5-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3JS 1.5 is determined by strict equivalence across the following critical parameters:

• Current Rating: 1.5 A
• Voltage Rating - AC: 350 V
• Voltage Rating - DC: 140 V
• Response Time: Slow Blow
• Package / Case: 2AG, 5mm x 15mm (Axial)
• Mounting Type: Through Hole
• Fuse Type: Cartridge, Glass
• Approval Agency: CE, CSA, cURus, PSE
• Operating Temperature Range: -55°C ~ 125°C

The 3JS 1.5-R meets all these criteria and serves as a direct functional equivalent. Both parts maintain identical electrical ratings, mechanical form factors, and regulatory certifications required for interchangeable use in applications originally designed for the 3JS 1.5.

Parameter Comparison

Engineering Selection Recommendations

The 3JS 1.5-R is the direct equivalent for the obsolete 3JS 1.5. Both parts maintain identical electrical and mechanical specifications across all critical parameters. The 3JS 1.5-R offers the additional advantage of active product status and ROHS3 compliance, making it the appropriate selection for new designs and component replacement in existing systems. The marginal differences in DC cold resistance (0.135 Ohms versus 0.094 Ohms) and melting I²t (14.5 versus 15) remain within acceptable engineering tolerances for this fuse category and do not affect functional interchangeability.

Frequently Asked Questions (FAQ)

Q: Can the 3JS 1.5-R be used as a direct replacement for the 3JS 1.5?

A: Yes. Both parts are identical in current rating (1.5 A), voltage ratings (350 V AC, 140 V DC), response time (slow blow), package form factor (2AG, 5mm x 15mm), and all regulatory certifications. Direct substitution is appropriate for all applications.

Q: What is the difference between the 3JS 1.5 and 3JS 1.5-R?

A: The primary differences are product status and compliance. The 3JS 1.5 is obsolete and RoHS non-compliant, while the 3JS 1.5-R is an active product with ROHS3 compliance. Minor variations exist in DC cold resistance and melting I²t, but these do not affect functional equivalence.

Q: Are there packaging differences between these parts?

A: The 3JS 1.5 is supplied in standard packaging, while the 3JS 1.5-R is supplied in bulk packaging. Both maintain the identical 2AG, 5mm x 15mm (axial) form factor and through-hole mounting configuration.

Q: What regulatory certifications apply to both parts?

A: Both the 3JS 1.5 and 3JS 1.5-R carry CE, CSA, cURus, and PSE approvals, ensuring compliance with international safety standards.

Q: Is the 3JS 1.5-R suitable for applications requiring RoHS compliance?

A: Yes. The 3JS 1.5-R is ROHS3 compliant, making it appropriate for applications with RoHS requirements. The original 3JS 1.5 is not RoHS compliant.