5STP 100 Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The 5STP 100 is a 100 mA, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations. Substitute parts must maintain identical electrical ratings and mechanical compatibility to ensure proper circuit protection without modification to existing designs.

Substiute Parts

5STP 100

Bel Fuse Inc.In Stock: 7875STP 100 Datasheet

Current PartRFQ

5STP 100-R

Bel Fuse Inc.In Stock: 17095STP 100-R Datasheet

DirectRFQ

0034.3107.PT

SCHURTER Inc.In Stock: 40650034.3107.PT Datasheet

DirectRFQ

0218.100MXEP

LittelfuseIn Stock: 17200218.100MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5STP 100 are qualified based on the following mandatory parameters:

• Current Rating: 100 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)

All substitute parts listed meet these criteria and are functionally interchangeable with the original 5STP 100 component.

Parameter Comparison

Engineering Selection Recommendations

For new designs and ongoing applications requiring the 5STP 100, the following active substitute parts are available:

5STP 100-R (Bel Fuse Inc.) maintains the original manufacturer lineage with active product status and ROHS3 compliance. This part is the direct successor to the obsolete 5STP 100 and carries expanded approval certifications including CCC and cURus.

0034.3107.PT (SCHURTER Inc., FST 5x20 series) provides an active alternative with ROHS3 compliance and cURus certification. This part is suitable for applications where cross-manufacturer qualification is acceptable.

0218.100MXEP (Littelfuse, 218 series) offers an active substitute with ROHS3 compliance and the broadest approval agency coverage including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. This part is appropriate for applications requiring multiple international certifications.

All three substitute parts are electrically and mechanically equivalent to the 5STP 100 and require no circuit or mechanical modifications for direct replacement.

Frequently Asked Questions (FAQ)

Q: Can the 5STP 100-R be used as a direct replacement for the 5STP 100?

A: Yes. The 5STP 100-R is electrically and mechanically identical to the 5STP 100, with identical current rating, voltage rating, response time, and package dimensions. The primary difference is product status (active vs. obsolete) and enhanced RoHS3 compliance.

Q: What are the physical dimension tolerances between substitute parts?

A: The 5STP 100 and 5STP 100-R are specified at 0.217" Dia x 0.827" L (5.50mm x 21.00mm). The 0034.3107.PT is specified at 0.213" Dia x 0.886" L (5.40mm x 22.50mm). The 0218.100MXEP is specified at 0.236" Dia x 0.886" L (6.00mm x 22.50mm). These minor dimensional variations remain within the 5mm x 20mm package classification and are compatible with standard through-hole fuse holders.

Q: Are there differences in melting I²t values between substitute parts?

A: Yes. The 5STP 100 specifies 0.03 I²t, the 0034.3107.PT specifies 0.107 I²t, and the 0218.100MXEP specifies 0.0482 I²t. These variations reflect different internal element designs while maintaining the same 100 mA current rating and slow-blow response characteristic. Selection should be based on application-specific thermal requirements.

Q: Which substitute part has the broadest international certification coverage?

A: The 0218.100MXEP (Littelfuse) carries certifications from CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE, providing the most comprehensive international approval coverage among the available substitutes.

Q: Is the 5STP 100 still available for purchase?

A: The 5STP 100 is classified as obsolete. However, 691 pieces are reported in stock as new original inventory. For long-term supply assurance, transition to an active substitute part is recommended.