Littelfuse 0217.400MXP Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0217.400MXP is a 400 mA, 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm form factor. This component is Active status and widely used in circuit protection applications requiring fast response characteristics. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and performance characteristics to ensure direct interchangeability in holder-based fuse applications.

Substiute Parts

0217.400MXP

Littelfuse Inc.In Stock: 16670217.400MXP Datasheet

Current PartRFQ

0217.400HXP

Littelfuse Inc.In Stock: 20070217.400HXP Datasheet

Parametric EquivalentRFQ

0217.400TXP

Littelfuse Inc.In Stock: 8860217.400TXP Datasheet

Parametric EquivalentRFQ

0617.400MXP

Littelfuse Inc.In Stock: 12930617.400MXP Datasheet

Parametric EquivalentRFQ

0034.1512

SCHURTER Inc.In Stock: 19800034.1512 Datasheet

DirectRFQ

BK/S500-400-R

Eaton - Electronics DivisionIn Stock: 1136BK/S500-400-R Datasheet

DirectRFQ

BK1/S500-400-R

Eaton - Electronics DivisionIn Stock: 1533BK1/S500-400-R Datasheet

MFR RecommendedRFQ

GDB-400MA

Eaton - Electronics DivisionIn Stock: 806GDB-400MA Datasheet

MFR RecommendedRFQ

FSD-400MA

OptiFuseIn Stock: 4896FSD-400MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

• Current Rating: 400 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity: 35A (exact match required)
• Mounting Type: Requires Holder (exact match required)

All substitute parts listed meet these criteria. Variations in secondary parameters such as Melting I²t, DC Cold Resistance, and specific approval agencies do not preclude substitution when primary electrical and mechanical parameters are identical.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are Active status components meeting the core electrical and mechanical requirements for direct substitution with the Littelfuse 0217.400MXP. Selection among equivalents should be based on:

Littelfuse Series (0217.400MXP, 0217.400HXP, 0217.400TXP, 0617.400MXP): These parts maintain identical primary electrical characteristics and are certified across CCC, CE, CSA, SEMKO, UL, and VDE standards. The 0217 series variants offer the highest inventory availability and certification consistency.

SCHURTER 0034.1512: Certified under CCC, cURus, and VDE with lower Melting I²t (0.085), suitable for applications requiring tighter thermal response control. Inventory availability is strong at 1915 units.

Eaton S500 Series (BK/S500-400-R, BK1/S500-400-R): Both variants provide broad certification coverage including BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE. Higher DC Cold Resistance (2 Ohms) and Melting I²t (0.18) characterize this series. BK1/S500-400-R is manufacturer-recommended with 1513 units in stock.

Eaton GDB Series (GDB-400MA): Certified under VDE and UR with characteristics matching the S500 series. Lowest inventory availability at 718 units.

OptiFuse FSD-400MA: Certified under cURus and IEC 60127 with Melting I²t of 0.1224. Highest inventory availability at 4813 units, suitable for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute the Littelfuse 0217.400MXP with any of the listed parts?

A: Yes. All listed parts are electrically and mechanically equivalent, matching the 400 mA current rating, 250 V voltage rating, 5mm x 20mm package, fast-blow response, and 35A breaking capacity. Direct substitution is supported in holder-based fuse applications.

Q: What is the difference between the Littelfuse 0217 series variants (MXP, HXP, TXP)?

A: The 0217.400MXP, 0217.400HXP, and 0217.400TXP are parametrically equivalent within the 217 series. Differences are limited to minor variations in DC Cold Resistance (0.277 vs. 0.2777 Ohms) and specific approval agency certifications. All three are suitable for direct substitution.

Q: How do Melting I²t values affect substitution?

A: Melting I²t indicates thermal response characteristics. While all listed parts meet the 35A breaking capacity requirement, variations in Melting I²t (ranging from 0.085 to 0.18) reflect different thermal profiles. Selection should align with application-specific thermal requirements, but all values are within acceptable ranges for the 400 mA, 250 V rating.

Q: Are there certification differences I should consider?

A: All parts carry Active status and meet international safety standards. Littelfuse variants include CCC, CE, CSA, SEMKO, UL, and VDE certifications. Eaton S500 and BK1/S500-400-R variants add BSI, cULus, and IMQ certifications. SCHURTER and OptiFuse parts carry more limited but valid certification sets. Selection should match your application's specific certification requirements.

Q: What is the significance of DC Cold Resistance variations?

A: DC Cold Resistance ranges from 0.277 Ohms (Littelfuse series) to 2 Ohms (Eaton series). Lower resistance reduces voltage drop in circuit protection applications. Selection depends on circuit design sensitivity to fuse resistance contribution.

Q: Can I use these parts interchangeably in existing designs?

A: Yes, provided your fuse holder accommodates the 5mm x 20mm cartridge form factor and your circuit design accepts the electrical characteristics of the selected substitute. All parts are mechanically and electrically compatible within the specified parameters.