5STP 315-R Equivalent & Substitute Parts

Part Overview

The 5STP 315-R is a 315 mA, 250 V AC/DC slow-blow glass cartridge fuse with a 5mm x 20mm axial through-hole package. Manufactured by Bel Fuse Inc., this component is actively produced and widely used in circuit protection applications requiring reliable overcurrent protection with delayed response characteristics. Finding equivalent substitute parts is necessary to ensure supply chain continuity, optimize procurement costs, and maintain design flexibility across manufacturing environments.

Substiute Parts

5STP 315-R

Bel Fuse Inc.In Stock: 21245STP 315-R Datasheet

Current PartRFQ

0034.3112.PT

SCHURTER Inc.In Stock: 17780034.3112.PT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5STP 315-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 315 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) (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The substitute part 0034.3112.PT manufactured by SCHURTER Inc. meets all these criteria and is therefore a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the 5STP 315-R and 0034.3112.PT are active production components with equivalent electrical and mechanical specifications. Selection between these parts should be based on:

• Procurement availability and lead time requirements
• Manufacturer certification requirements specific to your application (Bel Fuse Inc. certifications: CCC, CE, CSA, cULus, IMQ, SEMKO, VDE; SCHURTER Inc. certifications: cURus)
• Inventory status and cost considerations
• Existing supply chain relationships and qualification documentation

Both parts comply with RoHS3 and REACH requirements and carry identical ECCN and HTSUS classifications, making them suitable for equivalent circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can 0034.3112.PT be used as a direct replacement for 5STP 315-R?

A: Yes. Both parts share identical electrical ratings (315 mA, 250 V AC), response characteristics (Slow Blow), package dimensions (5mm x 20mm axial), and operating temperature range (-55°C ~ 125°C). They are functionally equivalent for circuit protection applications.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist. The 5STP 315-R measures 0.217" Dia x 0.827" L (5.50mm x 21.00mm), while the 0034.3112.PT measures 0.213" Dia x 0.886" L (5.40mm x 22.50mm). Both fit standard 5mm x 20mm fuse holders designed for axial through-hole mounting.

Q: What is the difference in melting I²t values?

A: The 5STP 315-R has a melting I²t of 0.46, while the 0034.3112.PT has 0.544. Both values fall within acceptable ranges for 315 mA slow-blow fuses and do not affect functional equivalence for standard circuit protection applications.

Q: Which certifications apply to each part?

A: The 5STP 315-R carries CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE approvals. The 0034.3112.PT carries cURus approval. Verify that the required certifications for your specific application are present before selection.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the 5STP 315-R and 0034.3112.PT are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.