5STP 500 Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The 5STP 500 is a 500 mA, 250 V AC/DC glass cartridge fuse with slow-blow response characteristics, designed for through-hole mounting in 5mm x 20mm form factor applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. Active alternatives from Bel Fuse Inc., SCHURTER Inc., and Littelfuse Inc. provide direct functional equivalence or parametric compatibility for circuit protection applications requiring this current and voltage rating.

Substiute Parts

5STP 500

Bel Fuse Inc.In Stock: 8135STP 500 Datasheet

Current PartRFQ

5STP 500-R

Bel Fuse Inc.In Stock: 13245STP 500-R Datasheet

DirectRFQ

5TTP 500-R

Bel Fuse Inc.In Stock: 21555TTP 500-R Datasheet

Parametric EquivalentRFQ

0034.3114.PT

SCHURTER Inc.In Stock: 34210034.3114.PT Datasheet

DirectRFQ

0034.3124.PT

SCHURTER Inc.In Stock: 37960034.3124.PT Datasheet

DirectRFQ

0218.500MXEP

Littelfuse Inc.In Stock: 12240218.500MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of electrical and mechanical parameters. The following criteria define valid substitutes for the 5STP 500:

Primary Substitution Criteria:

• Current Rating: 500 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 form factor (exact match required)
• Mounting Type: Through Hole (exact match required)

Direct Manufacturer Equivalents (5STP 500-R, 0034.3114.PT, 0218.500MXEP) meet all primary criteria and are functionally interchangeable with the obsolete 5STP 500.

Parametric Equivalent (5TTP 500-R) matches all primary electrical and mechanical parameters but exhibits different breaking capacity (100 A vs. 35 A) and melting I²t characteristics (2.49 vs. 1.4). This part is suitable for applications where higher breaking capacity is acceptable or beneficial.

Non-Equivalent Part (0034.3124.PT) has a current rating of 5 A and is excluded from substitution consideration due to fundamental electrical parameter mismatch.

Parameter Comparison

Engineering Selection Recommendations

5STP 500-R (Bel Fuse Inc.) is the primary direct replacement for the obsolete 5STP 500. Both parts are manufactured by Bel Fuse Inc., share identical electrical and mechanical specifications, and maintain the same breaking capacity and melting I²t characteristics. The 5STP 500-R is active in production, ROHS3 compliant, and carries expanded approval certifications (CCC, CE, CSA, cURus, IMQ, SEMKO, VDE) compared to the original part.

5TTP 500-R (Bel Fuse Inc.) provides parametric equivalence with enhanced breaking capacity (100 A vs. 35 A) and higher melting I²t (2.49 vs. 1.4). This part is suitable for applications where increased fault current handling capability is required or where the original breaking capacity specification is not a limiting constraint.

0034.3114.PT (SCHURTER Inc.) matches all primary electrical and mechanical parameters with identical current, voltage, and response characteristics. Dimensional variation exists (5.40mm x 22.50mm vs. 5.50mm x 21.00mm), and melting I²t is higher (3 vs. 1.4). This part is ROHS3 compliant and carries cURus certification.

0218.500MXEP (Littelfuse Inc.) provides direct functional equivalence across all primary parameters. Dimensional variation exists (5.80mm x 22.50mm vs. 5.50mm x 21.00mm), and melting I²t is 2.825 versus 1.4. This part is ROHS3 compliant and carries comprehensive certifications (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE).

All active substitutes are ROHS3 compliant, addressing environmental compliance requirements not met by the obsolete 5STP 500.

Frequently Asked Questions (FAQ)

Q: Can 5STP 500-R be used as a direct replacement for 5STP 500?

A: Yes. The 5STP 500-R is a direct manufacturer equivalent with identical electrical specifications (500 mA, 250 V AC/DC), fuse type (cartridge, glass), response time (slow blow), and package dimensions (5mm x 20mm). Both parts share the same breaking capacity (35 A) and melting I²t (1.4). The primary difference is product status: 5STP 500-R is active in production while 5STP 500 is obsolete.

Q: What is the difference between 5STP 500-R and 5TTP 500-R?

A: Both parts share identical current rating (500 mA), voltage rating (250 V AC), fuse type (cartridge, glass), response time (slow blow), and package form factor (5mm x 20mm). The 5TTP 500-R has higher breaking capacity (100 A vs. 35 A) and higher melting I²t (2.49 vs. 1.4). Selection depends on whether the application requires the higher breaking capacity specification of the 5TTP series.

Q: Are dimensional variations between substitute parts significant?

A: Dimensional variations exist among substitutes. The 5STP 500 measures 5.50mm x 21.00mm. The 0034.3114.PT measures 5.40mm x 22.50mm, and the 0218.500MXEP measures 5.80mm x 22.50mm. These variations may affect fit in space-constrained applications or fuse holders with tight mechanical tolerances. Verify mechanical compatibility with the target application before selection.

Q: Why is 0034.3124.PT not listed as a substitute?

A: The 0034.3124.PT has a current rating of 5 A, which does not match the required 500 mA specification. Current rating is a primary substitution criterion and cannot be compromised. This part is not functionally equivalent for applications designed for 500 mA protection.

Q: What compliance advantages do active substitutes offer over the obsolete 5STP 500?

A: All active substitutes (5STP 500-R, 5TTP 500-R, 0034.3114.PT, 0218.500MXEP) are ROHS3 compliant, whereas the obsolete 5STP 500 is RoHS non-compliant. For new designs or systems requiring environmental compliance certification, active substitutes are necessary. Additionally, active parts carry current approval certifications (CE, CSA, cURus, UL, VDE) reflecting current regulatory standards.