Equivalent & Substitute Parts for 2JS 7-R Glass Cartridge Fuse

Part Overview

The 2JS 7-R is a 7 A slow-blow glass cartridge fuse manufactured by Bel Fuse Inc., rated for 350 V AC and 140 V DC operation. This fuse is designed for applications requiring reliable overcurrent protection in industrial and commercial equipment. The part is currently active in production with 1705 units in stock. Alternative equivalent parts may be required due to supply chain considerations, regional availability, or specific application voltage requirements.

Substiute Parts

2JS 7-R

Bel Fuse Inc.In Stock: 17972JS 7-R Datasheet

Current PartRFQ

0209007.MXP

Littelfuse Inc.In Stock: 18080209007.MXP Datasheet

SimilarRFQ

0229007.MXP

Littelfuse Inc.In Stock: 21730229007.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 2JS 7-R is determined by the following critical parameters:

• Current Rating: Must be 7 A
• Fuse Type: Must be Cartridge, Glass
• Response Time: Must be Slow Blow
• Package / Case: Must be 2AG, 5mm x 15mm form factor
• Voltage Rating - AC: Must support minimum 350 V AC
• Voltage Rating - DC: Must support minimum 140 V DC
• Mounting Type: Must require holder (not panel-mount)

Two substitute parts meet these criteria with the following considerations:

0209007.MXP (Littelfuse Inc.): Meets current rating, fuse type, response time, and package requirements. AC voltage rating matches at 350 V. DC voltage rating is not specified in available data. Breaking capacity is 100 A at rated voltage.

0229007.MXP (Littelfuse Inc.): Meets current rating, fuse type, response time, and package requirements. However, voltage ratings are 125 V AC and 125 V DC, which are below the 350 V AC and 140 V DC requirements of the main part. This part is suitable only for applications with lower voltage requirements.

Parameter Comparison

Engineering Selection Recommendations

0209007.MXP (Littelfuse Inc.) is the primary equivalent substitute for applications operating at 350 V AC. This part maintains identical current rating, fuse type, response time, and 2AG package specifications. Both parts carry CE and PSE certifications. The 0209007.MXP holds cULus approval, while the original 2JS 7-R holds CSA and cURus approvals. Selection of this substitute requires confirmation that the application does not exceed the specified DC voltage requirements.

0229007.MXP (Littelfuse Inc.) is suitable only for applications with reduced voltage requirements of 125 V AC and 125 V DC maximum. This part is not a direct equivalent for circuits designed for 350 V AC operation. The 0229007.MXP provides higher breaking capacity (400 A) and includes UL certification in addition to CE, CSA, and PSE approvals.

All substitute parts maintain ROHS3 compliance and the same operating temperature range as the original part.

Frequently Asked Questions (FAQ)

Q: Can 0209007.MXP be used as a direct replacement for 2JS 7-R in all applications?

A: The 0209007.MXP matches the 350 V AC rating of the 2JS 7-R. However, the DC voltage rating for the 0209007.MXP is not specified in available documentation. Confirmation of DC voltage compatibility with your specific application is necessary before substitution.

Q: Why is 0229007.MXP listed as a substitute if its voltage rating is lower?

A: The 0229007.MXP is listed as a substitute for applications where the circuit voltage does not exceed 125 V AC or 125 V DC. It is not suitable for circuits designed for the full 350 V AC rating of the 2JS 7-R.

Q: Are all substitute parts compatible with the same fuse holder?

A: Yes. All parts listed use the 2AG package specification with 5mm x 15mm dimensions and require a compatible 2AG fuse holder. Physical compatibility is maintained across all substitutes.

Q: What are the key differences in approval certifications?

A: The 2JS 7-R carries CE, CSA, cURus, and PSE certifications. The 0209007.MXP carries CE, cULus, and PSE certifications. The 0229007.MXP carries CE, CSA, PSE, and UL certifications. Application requirements may dictate which certifications are necessary for your specific region or equipment standard.

Q: Do all parts have the same response time characteristic?

A: Yes. All listed parts are slow-blow fuses with identical response time characteristics, suitable for circuits requiring protection against temporary inrush currents.