Littelfuse 0217.040HXP Glass Cartridge Fuse 40mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0217.040HXP is a 40 mA, 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm form factor requiring a holder for mounting. This part is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts from active manufacturers is necessary to maintain design continuity and ensure supply chain availability for new production and field replacements.

Substiute Parts

0217.040HXP

Littelfuse Inc.In Stock: 9360217.040HXP Datasheet

Current PartRFQ

0034.1528

SCHURTER Inc.In Stock: 37080034.1528 Datasheet

DirectRFQ

BK/S500-40-R

Eaton - Electronics DivisionIn Stock: 811BK/S500-40-R Datasheet

DirectRFQ

BK1/S500-40-R

Eaton - Electronics DivisionIn Stock: 812BK1/S500-40-R Datasheet

MFR RecommendedRFQ

GDB-400MA

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

MFR RecommendedRFQ

GDB-40MA

Eaton - Electronics DivisionIn Stock: 842GDB-40MA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 0217.040HXP is determined by strict equivalence across the following critical parameters:

• Current Rating: 40 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Breaking Capacity: 35A (exact match required)

Parts meeting all these criteria are direct functional equivalents. The substitute parts identified below satisfy all electrical and mechanical parameters necessary for direct replacement in applications designed for the 0217.040HXP.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are active products from established manufacturers and meet the electrical and mechanical specifications of the 0217.040HXP. Selection among these equivalents should be based on:

• Product availability and lead time from the chosen manufacturer
• Compliance certifications required for the end application (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE)
• RoHS compliance requirements for the target market
• Inventory status and supply chain reliability

The SCHURTER 0034.1528 and Eaton BK/S500-40-R and BK1/S500-40-R series are all active products with established supply chains. The Eaton GDB-40MA is also an active equivalent. All four substitute parts are direct functional replacements for the obsolete Littelfuse 0217.040HXP.

Frequently Asked Questions (FAQ)

Q: Can GDB-400MA be used as a substitute for the 0217.040HXP?

A: No. The GDB-400MA has a current rating of 400 mA, which does not match the required 40 mA specification. Using a 400 mA fuse in place of a 40 mA fuse will result in inadequate circuit protection and is not a valid substitution.

Q: Are all substitute parts pin-compatible with the original 0217.040HXP?

A: Yes. All identified substitute parts are 5mm x 20mm glass cartridge fuses requiring a holder. They are mechanically and electrically compatible with the same holder used for the original part.

Q: What is the difference between BK/S500-40-R and BK1/S500-40-R?

A: Both parts are 40 mA, 250 V AC fast-blow fuses in 5mm x 20mm form factor with identical electrical characteristics. The primary difference is the RoHS compliance designation. Both are active products suitable for replacement applications.

Q: Do all substitute parts have the same melting I²t value?

A: No. The melting I²t values vary slightly among the substitutes (ranging from 8E-05 to 0.000128). These variations are within acceptable tolerance for fast-blow fuses of this rating and do not affect functional equivalence for standard circuit protection applications.

Q: Which substitute part has the best availability?

A: Inventory status is provided for reference: SCHURTER 0034.1528 (3622 pcs), Eaton BK1/S500-40-R (705 pcs), Eaton BK/S500-40-R (796 pcs), and Eaton GDB-40MA (829 pcs). Availability should be confirmed with the specific distributor or manufacturer at the time of procurement.