5STP 250-R Equivalent & Substitute Parts Reference

Part Overview

The 5STP 250-R is a 250 mA, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm axial through-hole package. This component is classified as Active product status and is widely used in power distribution, circuit protection, and industrial control applications where reliable overcurrent protection is required. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility is needed while maintaining electrical and mechanical compatibility.

Substiute Parts

5STP 250-R

Bel Fuse Inc.In Stock: 13475STP 250-R Datasheet

Current PartRFQ

5TTP 250-R

Bel Fuse Inc.In Stock: 18425TTP 250-R Datasheet

Parametric EquivalentRFQ

0034.3111.PT

SCHURTER Inc.In Stock: 18610034.3111.PT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5STP 250-R are qualified based on the following critical parameters:

• Current Rating: 250 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm axial configuration (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

Two substitute parts meet these criteria: the 5TTP 250-R (Bel Fuse Inc.) and the 0034.3111.PT (SCHURTER Inc.). Both maintain identical electrical ratings, mechanical dimensions, and environmental specifications as the main part.

Parameter Comparison

Engineering Selection Recommendations

All three parts—5STP 250-R, 5TTP 250-R, and 0034.3111.PT—are Active status components with ROHS3 compliance and are suitable for direct substitution based on electrical and mechanical parameters.

5STP 250-R (Bel Fuse Inc.): Primary reference part with CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE approvals. Breaking capacity of 35A and melting I²t of 0.26 define its performance envelope.

5TTP 250-R (Bel Fuse Inc.): Parametric equivalent from the same manufacturer with identical electrical ratings and package dimensions. Offers higher breaking capacity (100A) and higher melting I²t (0.719), indicating enhanced fault tolerance. Certifications include CE, CSA, and cULus.

0034.3111.PT (SCHURTER Inc.): Direct manufacturer alternative with identical electrical ratings. Dimensional variation exists: 0.213" Dia x 0.886" L (5.40mm x 22.50mm) versus the standard 5mm x 20mm specification. Breaking capacity matches the main part at 35A. Certification includes cURus.

Selection between these parts depends on availability, supply chain requirements, and specific application approval certifications needed.

Frequently Asked Questions (FAQ)

Q: Can the 5TTP 250-R be used as a direct replacement for the 5STP 250-R?

A: Yes. Both parts share identical current rating (250 mA), voltage rating (250 V AC), response time (Slow Blow), package configuration (5mm x 20mm axial), and operating temperature range (-55°C ~ 125°C). The 5TTP 250-R offers higher breaking capacity and melting I²t values, which do not prevent substitution.

Q: What is the dimensional difference between the 0034.3111.PT and the other parts?

A: The 0034.3111.PT measures 0.213" Dia x 0.886" L (5.40mm x 22.50mm), while the 5STP 250-R and 5TTP 250-R measure 0.217" Dia x 0.827" L (5.50mm x 21.00mm). These minor variations remain within the 5mm x 20mm axial package classification and do not affect through-hole mounting compatibility.

Q: Are all three parts RoHS compliant?

A: Yes. All three parts—5STP 250-R, 5TTP 250-R, and 0034.3111.PT—are ROHS3 Compliant.

Q: What certifications apply to each part?

A: 5STP 250-R carries CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE approvals. 5TTP 250-R carries CE, CSA, and cULus approvals. 0034.3111.PT carries cURus approval. Application requirements determine which certification set is necessary.

Q: Do these parts have different electrical performance characteristics?

A: Breaking capacity and melting I²t values differ. The 5STP 250-R and 0034.3111.PT both have 35A breaking capacity, while the 5TTP 250-R has 100A. Melting I²t values are 0.26 (5STP 250-R), 0.719 (5TTP 250-R), and 0.238 (0034.3111.PT). These differences do not prevent substitution when electrical ratings and response characteristics match.