5SF 100 Equivalent & Substitute Parts Reference

Part Overview

The 5SF 100 is a 100 mA, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm package format. This component is classified as obsolete, requiring identification of active equivalent parts for ongoing design and maintenance applications. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and functional characteristics to ensure direct compatibility in existing fuse holder assemblies.

Substiute Parts

5SF 100

Bel Fuse Inc.In Stock: 11605SF 100 Datasheet

Current PartRFQ

0034.1506

SCHURTER Inc.In Stock: 9730034.1506 Datasheet

DirectRFQ

0217.100MXBP

Littelfuse Inc.In Stock: 11830217.100MXBP Datasheet

DirectRFQ

0217.100MXP

Littelfuse Inc.In Stock: 55440217.100MXP Datasheet

DirectRFQ

0217.100TXP

Littelfuse Inc.In Stock: 8900217.100TXP Datasheet

DirectRFQ

0217.100VXP

Littelfuse Inc.In Stock: 11310217.100VXP Datasheet

DirectRFQ

0217.100HXP

Littelfuse Inc.In Stock: 31060217.100HXP Datasheet

SimilarRFQ

BK1/S500-100-R

Eaton - Electronics DivisionIn Stock: 1868BK1/S500-100-R Datasheet

SimilarRFQ

GDB-100MA

Eaton - Electronics DivisionIn Stock: 960GDB-100MA Datasheet

SimilarRFQ

S500-100-R

Eaton - Electronics DivisionIn Stock: 805S500-100-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

• Current Rating: 100 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Fast Blow (exact match required)
• Package Dimensions: 5mm x 20mm (exact match required)
• Breaking Capacity: 35A (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in melting I²t, DC cold resistance, and RoHS compliance status do not affect functional substitutability within the specified electrical operating envelope.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically equivalent to the 5SF 100 and are suitable for direct replacement in applications requiring a 100 mA, 250 V AC/DC fast-blow fuse in a 5mm x 20mm cartridge format.

Littelfuse 217 series parts (0217.100MXBP, 0217.100MXP, 0217.100TXP, 0217.100VXP, 0217.100HXP) are active production items with ROHS3 compliance and comprehensive international certifications (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE).

SCHURTER 0034.1506 (FSF 5x20 series) is an active alternative with ROHS3 compliance and certifications from CCC, cURus, and VDE.

Eaton S500 series parts (BK1/S500-100-R, S500-100-R) and GDB-100MA are active alternatives with RoHS compliance. Operating temperature specifications are not provided for these variants.

Selection between equivalent parts should be based on availability, lead time, and existing supply chain relationships, as all parts meet the specified electrical and mechanical requirements.

Frequently Asked Questions (FAQ)

Q: Can the 5SF 100 be directly replaced with any of the listed substitute parts?

A: Yes. All listed parts maintain identical current rating (100 mA), voltage rating (250 V AC), response time (fast blow), package dimensions (5mm x 20mm), and breaking capacity (35A). Direct substitution is electrically and mechanically compatible.

Q: What is the significance of the different Littelfuse part number suffixes (MXP, TXP, VXP, HXP)?

A: The suffixes indicate different certification and approval agency combinations. All variants maintain identical electrical specifications and are functionally equivalent. Selection depends on required certifications for the end application.

Q: Are there differences in melting I²t values between the main part and substitutes?

A: Melting I²t values vary slightly across manufacturers (0.005 for 5SF 100, 0.0014 to 0.0045 for substitutes). These variations remain within acceptable operating parameters for the 100 mA, 250 V fast-blow classification and do not affect substitutability.

Q: Does RoHS compliance status affect substitution eligibility?

A: RoHS compliance is a regulatory requirement for specific markets and applications but does not affect electrical or mechanical compatibility. The 5SF 100 is RoHS non-compliant, while most active substitutes are ROHS3 compliant. Selection should align with end-product regulatory requirements.

Q: Are Eaton S500 series parts suitable replacements despite missing operating temperature specifications?

A: Eaton S500 series parts (BK1/S500-100-R, S500-100-R) and GDB-100MA maintain all specified electrical and mechanical parameters. The absence of documented operating temperature range does not affect functional substitutability within standard industrial operating conditions.

Q: Can these fuses be used in any 5mm x 20mm fuse holder?

A: Yes. All substitute parts are cartridge-type fuses requiring a holder assembly. Mechanical compatibility is ensured by the standardized 5mm x 20mm package format. Verify holder compatibility with the specific application requirements.