Bel Fuse Inc. 5ST 630 Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Bel Fuse Inc. 5ST 630 is a 630 mA, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm form factor, designed for applications requiring holder-mounted fuse protection. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. Substitute parts maintain identical electrical ratings and mechanical dimensions while offering active product status and improved compliance certifications.

Substiute Parts

5ST 630

Bel Fuse Inc.In Stock: 7145ST 630 Datasheet

Current PartRFQ

5ST 630-R

Bel Fuse Inc.In Stock: 131325ST 630-R Datasheet

DirectRFQ

0034.3115

SCHURTER Inc.In Stock: 108490034.3115 Datasheet

DirectRFQ

0218.630HXP

Littelfuse Inc.In Stock: 17750218.630HXP Datasheet

DirectRFQ

0218.630MXBP

Littelfuse Inc.In Stock: 11100218.630MXBP Datasheet

DirectRFQ

0218.630MXP

LittelfuseIn Stock: 24880218.630MXP Datasheet

DirectRFQ

0218.630TXP

Littelfuse Inc.In Stock: 8180218.630TXP Datasheet

DirectRFQ

0218.630VXP

Littelfuse Inc.In Stock: 7180218.630VXP Datasheet

DirectRFQ

0034.2514

SCHURTER Inc.In Stock: 16530034.2514 Datasheet

SimilarRFQ

0034.3772

SCHURTER Inc.In Stock: 19560034.3772 Datasheet

SimilarRFQ

GDC-630MA

Eaton - Electronics DivisionIn Stock: 677GDC-630MA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Identical Electrical & Mechanical Parameters): Parts meeting all core parameters: 630 mA current rating, 250 V AC voltage rating, slow-blow response time, 5mm x 20mm package, 35 A breaking capacity, and -55°C to 125°C operating temperature range. These parts are interchangeable in applications where the original 5ST 630 was specified.

Similar Substitutes (Compatible with Minor Parameter Variations): Parts sharing the same current rating, voltage rating, package dimensions, and fuse type but differing in response time classification, breaking capacity, melting I²t characteristics, or operating temperature range. These require application-level verification before substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Direct Substitutes:

The Bel Fuse Inc. 5ST 630-R is the direct equivalent, offering identical electrical and mechanical specifications with active product status and ROHS3 compliance. This part is the preferred replacement for obsolete 5ST 630 applications.

Littelfuse Inc. parts 0218.630HXP, 0218.630MXBP, 0218.630MXP, 0218.630TXP, and 0218.630VXP are functionally equivalent direct substitutes. All maintain 630 mA current rating, 250 V AC voltage, slow-blow response, 5mm x 20mm package, and -55°C to 125°C operating range. These parts carry comprehensive international certifications including CCC, CE, CSA, UL, and VDE.

SCHURTER Inc. 0034.3115 is a direct substitute with identical core parameters and active product status. This part is suitable for applications requiring SCHURTER-qualified components.

Secondary Similar Substitutes:

SCHURTER Inc. 0034.3772 maintains electrical equivalence with a reduced operating temperature range (-40°C to 85°C). This part is suitable for applications operating within this narrower temperature window.

SCHURTER Inc. 0034.2514 differs in response time (medium blow vs. slow blow) and breaking capacity (80 A vs. 35 A). This part is suitable only for applications where medium-blow response and higher breaking capacity are acceptable.

Eaton GDC-630MA maintains core electrical parameters with active product status. Certification details are limited; verification against application requirements is necessary.

Frequently Asked Questions (FAQ)

Q: Can I use any substitute part listed in place of the 5ST 630?

A: Direct substitutes (5ST 630-R, Littelfuse 0218 series, SCHURTER 0034.3115) are electrically and mechanically interchangeable. Similar substitutes (0034.2514, 0034.3772, GDC-630MA) require application-level verification due to parameter variations in response time, breaking capacity, or operating temperature range.

Q: What is the difference between slow-blow and medium-blow fuses?

A: Response time classification indicates the fuse's tolerance to temporary overcurrent conditions. Slow-blow fuses tolerate brief current surges before melting, suitable for inductive loads. Medium-blow fuses respond faster to overcurrent. The 5ST 630 is slow-blow; substitution with medium-blow types (0034.2514) requires confirmation that the application can tolerate faster response.

Q: Are all substitute parts RoHS compliant?

A: The original 5ST 630 is RoHS non-compliant. All active direct substitutes (5ST 630-R, Littelfuse 0218 series, SCHURTER 0034.3115, 0034.3772) are ROHS3 compliant. Eaton GDC-630MA RoHS status is not specified in available data.

Q: Does package dimension variation affect compatibility?

A: The 5ST 630 specifies 5mm x 20mm dimensions. All listed substitutes maintain this package size. Minor dimensional variations (e.g., 5.10mm vs. 5.20mm diameter) are within standard manufacturing tolerances and do not affect holder compatibility.

Q: What certifications should I verify for my application?

A: The 5ST 630 carries CE, CSA, IMQ, SEMKO, UL, and VDE approvals. Direct substitutes maintain equivalent or expanded certification coverage. Verify that selected substitute parts carry certifications required by your application's regulatory framework and end-use market.

Q: Can I substitute the 5ST 630 in applications requiring -55°C operation?

A: Direct substitutes maintain the -55°C to 125°C operating range. SCHURTER 0034.3772 and 0034.2514 operate only to -40°C minimum; these are unsuitable for applications requiring -55°C operation. Verify operating temperature requirements before substitution.