5STP 500-R Equivalent & Substitute Parts

Part Overview

The 5STP 500-R is a 500 mA, 250 V AC/DC slow-blow glass fuse cartridge in a 5mm x 20mm axial package manufactured by Bel Fuse Inc. This component is active in production and widely used in electronic equipment requiring overcurrent protection. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional characteristics to ensure direct replacement capability in circuit protection applications.

Substiute Parts

5STP 500-R

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

Current PartRFQ

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

BK/S506-V-500-R

Eaton - Electronics DivisionIn Stock: 796BK/S506-V-500-R Datasheet

DirectRFQ

0218.500MXEP

Littelfuse Inc.In Stock: 12240218.500MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

• Current Rating: 500 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Package / Case: 5mm x 20mm axial configuration (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)

Parts meeting all these criteria are classified as direct equivalents. Parts with identical electrical and mechanical specifications but different manufacturers are suitable for direct replacement. The 0034.3124.PT is excluded from substitution due to a different current rating (5 A instead of 500 mA).

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and equivalent electrical and mechanical specifications to the 5STP 500-R. Selection among equivalents should be based on:

• Approval agency requirements for the target application (CCC, CE, CSA, cURus, UL, VDE, etc.)
• Availability and lead time from the selected manufacturer
• DC cold resistance characteristics if circuit design requires specific impedance matching
• Breaking capacity requirements; the 5TTP 500-R offers 100 A breaking capacity compared to 35 A for other equivalents

The 5STP 500-R, BK/S506-V-500-R, and 0218.500MXEP share identical breaking capacity (35 A) and are interchangeable for standard applications. The 5TTP 500-R provides enhanced breaking capacity and may be selected for applications requiring higher fault current handling.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts share identical current rating (500 mA), voltage rating (250 V AC), fuse type (cartridge, glass), response time (slow blow), and package dimensions (5mm x 20mm axial). The 5TTP 500-R has a higher breaking capacity (100 A vs. 35 A) and different DC cold resistance, but these differences do not prevent direct substitution in applications designed for the 5STP 500-R.

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

A: The 0034.3124.PT has a current rating of 5 A, which differs from the 500 mA requirement of the 5STP 500-R. Current rating is a critical parameter for fuse selection and cannot be varied without altering circuit protection characteristics.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts meet ROHS3 compliance requirements.

Q: What is the significance of DC cold resistance differences among the substitutes?

A: DC cold resistance values vary among manufacturers (0.183 Ω to 0.981 Ω). In most applications, these differences are negligible. However, in circuits with tight impedance specifications or high-frequency operation, DC cold resistance should be verified against circuit design requirements before substitution.

Q: Which substitute offers the broadest approval agency coverage?

A: The BK/S506-V-500-R (Eaton) and 5STP 500-R (Bel Fuse) both carry approvals from CCC, CE, CSA, cURus, IMQ, SEMKO, and VDE. The 0218.500MXEP (Littelfuse) adds K-MARK and UL approvals. Selection should align with the specific regulatory requirements of the target application.

Q: Can package dimension variations affect mechanical fit?

A: All substitute parts are specified for 5mm x 20mm axial packages. Minor dimensional variations (e.g., 5.40mm vs. 5.50mm diameter) are within standard tolerance ranges for through-hole fuse cartridges and do not affect mechanical compatibility in standard fuse holders.