Equivalent & Substitute Parts for 0218.315MXEP

Part Overview

The Littelfuse 0218.315MXEP is a 315 mA, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm through-hole package. This component is classified as Active product status and is widely used in power distribution and circuit protection applications. Equivalent and substitute parts are identified to provide design flexibility, ensure supply chain continuity, and support component availability across multiple manufacturers while maintaining identical electrical and mechanical specifications.

Substiute Parts

0218.315MXEP

Littelfuse Inc.In Stock: 9670218.315MXEP Datasheet

Current PartRFQ

0034.3112.PT

SCHURTER Inc.In Stock: 17780034.3112.PT Datasheet

DirectRFQ

5STP 315-R

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0218.315MXEP are qualified based on 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: 35A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

All identified substitute parts meet these criteria and are manufactured by recognized component suppliers with active product status.

Parameter Comparison

Engineering Selection Recommendations

All three parts—0218.315MXEP (Littelfuse), 0034.3112.PT (SCHURTER), and 5STP 315-R (Bel Fuse)—are Active product status and meet the core electrical and mechanical requirements for direct substitution. Selection among these parts should be based on:

• Approval agency requirements for the target application (UL, CE, CSA, cULus, VDE, etc.)
• Physical dimension constraints within the PCB or assembly footprint
• Availability and lead time from component distributors
• DC cold resistance specifications if circuit design requires specific resistance values

The Littelfuse 0218.315MXEP provides the broadest approval agency coverage (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE). The SCHURTER 0034.3112.PT offers the smallest diameter (5.40mm). The Bel Fuse 5STP 315-R provides the shortest length (21.00mm) and includes cULus certification.

Frequently Asked Questions (FAQ)

Q: Can these parts be used interchangeably in all applications? A: Yes, provided the application does not impose specific constraints on physical dimensions, DC cold resistance, or particular approval agency certifications. All parts meet identical electrical specifications for current rating, voltage rating, response time, and breaking capacity.

Q: What is the significance of the Melting I²t values? A: Melting I²t indicates the thermal energy required to melt the fuse element. While all parts are rated for 315 mA at 250 V, the different I²t values reflect manufacturing variations. For applications with strict thermal coordination requirements, verify that the selected part's I²t is acceptable for the circuit design.

Q: Are there physical fitment considerations? A: Yes. The three parts have slightly different dimensions. The Littelfuse part is 5.80mm in diameter and 22.50mm in length; the SCHURTER part is 5.40mm in diameter and 22.50mm in length; the Bel Fuse part is 5.50mm in diameter and 21.00mm in length. Verify that the selected part fits within the fuse holder or socket used in the application.

Q: Which part should I select if approval agency certification is critical? A: The Littelfuse 0218.315MXEP carries the most comprehensive certification set (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE). If the application requires specific certifications not listed for the other parts, the Littelfuse part is the recommended choice.

Q: Is DC cold resistance important for my application? A: DC cold resistance becomes relevant in circuits where the fuse element's resistance affects circuit performance or voltage drop. The Littelfuse part specifies 0.8475 Ohms and the Bel Fuse part specifies 1.3 Ohms. If this parameter is critical, select accordingly. The SCHURTER part does not specify this value.