Littelfuse 0217.100H Glass Cartridge Fuse 100mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0217.100H is a 100mA 250VAC fast-blow glass cartridge fuse in 5x20mm form factor, designed for circuit protection in AC/DC applications. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications. Substitute parts must preserve the 100mA current rating, 250V voltage rating, fast-blow response characteristic, and 5x20mm physical dimensions to ensure direct functional replacement without circuit redesign.

Key Parameters

Parameter	Value
Current Rating	100 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	35A
Operating Temperature Range	-55°C to 125°C
Mounting Type	Requires Holder

Substitute Part Grouping Explanation

Substitution logic is based on strict equivalence of the following critical parameters:

Current Rating: 100 mA (exact match required)
Voltage Rating: 250 V AC (exact match required)
Response Time: Fast Blow (exact match required)
Physical Form Factor: 5mm x 20mm cartridge (exact match required)
Fuse Type: Glass cartridge requiring holder (exact match required)

Substitute parts are grouped into two categories:

Category 1: Littelfuse Series 217 Active Equivalents — Direct replacements with identical electrical characteristics and active product status. These parts share the same series designation and maintain full parameter compatibility.

Category 2: Littelfuse Series 235 Active Equivalents — Functionally equivalent alternatives with identical electrical ratings but different internal construction (Melting I²t: 0.00312 vs. 0.0045) and DC cold resistance characteristics. These remain electrically compatible for the specified 100mA 250V application.

Category 3: Cross-Manufacturer Equivalents — Eaton-manufactured alternatives meeting identical electrical and mechanical specifications, providing supply chain flexibility.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage Rating (AC)	Response Time	Package	Breaking Capacity	Product Status	RoHS Status
0217.100H	Littelfuse Inc.	217	100 mA	250 V	Fast Blow	5x20mm	35A	Obsolete	Non-compliant
0217.100HXP	Littelfuse Inc.	217	100 mA	250 V	Fast Blow	5x20mm	35A	Active	ROHS3 Compliant
0217.100MXBP	Littelfuse Inc.	217	100 mA	250 V	Fast Blow	5x20mm	35A	Active	ROHS3 Compliant
0217.100MXP	Littelfuse Inc.	217	100 mA	250 V	Fast Blow	5x20mm	35A	Active	ROHS3 Compliant
0217.100TXP	Littelfuse Inc.	217	100 mA	250 V	Fast Blow	5x20mm	35A	Active	ROHS3 Compliant
0217.100VXP	Littelfuse Inc.	217	100 mA	250 V	Fast Blow	5x20mm	35A	Active	ROHS3 Compliant
0235.100HXP	Littelfuse Inc.	235	100 mA	250 V	Fast Blow	5x20mm	35A	Active	ROHS3 Compliant
0235.100MXP	Littelfuse Inc.	235	100 mA	250 V	Fast Blow	5x20mm	35A	Active	ROHS3 Compliant
0235.100VXP	Littelfuse Inc.	235	100 mA	250 V	Fast Blow	5x20mm	35A	Active	ROHS3 Compliant
BK/GDB-100MA	Eaton - Electronics Division	GDB	100 mA	250 V	Fast Blow	5x20mm	35A	Active	RoHS Compliant
BK/GMA-100-R	Eaton - Electronics Division	GMA	100 mA	250 V	Fast Blow	5x20mm	35A	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: Littelfuse Series 217 Active Variants

The 0217.100HXP, 0217.100MXBP, 0217.100MXP, 0217.100TXP, and 0217.100VXP represent direct series continuations of the obsolete 0217.100H. All maintain identical electrical specifications (100mA, 250V, fast-blow, 5x20mm) and are ROHS3 compliant. These parts are preferred for applications requiring exact series compatibility and are available in bulk packaging with substantial inventory levels (820–5500 units).

Secondary Recommendation: Littelfuse Series 235 Variants

The 0235.100HXP, 0235.100MXP, and 0235.100VXP provide functional equivalence with identical electrical ratings and form factor. These parts differ in internal construction characteristics (Melting I²t: 0.00312 vs. 0.0045 for Series 217) and DC cold resistance (8.4 Ohms vs. 5.6965 Ohms). Series 235 parts are suitable for applications where internal construction differences do not affect circuit performance and are ROHS3 compliant.

Cross-Manufacturer Alternative: Eaton GDB and GMA Series

The BK/GDB-100MA and BK/GMA-100-R from Eaton provide electrical and mechanical equivalence with different internal specifications. BK/GDB-100MA offers RoHS compliance with a Melting I²t of 0.003 and DC cold resistance of 3.8 Ohms. BK/GMA-100-R provides ROHS3 compliance with a Melting I²t of 0.0001 and DC cold resistance of 7.84 Ohms. These alternatives support supply chain diversification while maintaining functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the obsolete 0217.100H with any of the listed substitutes?

A: Yes. All listed substitutes maintain the critical electrical parameters: 100mA current rating, 250V AC voltage rating, fast-blow response, and 5x20mm physical dimensions. Direct mechanical and electrical compatibility is confirmed for all listed parts.

Q: What is the difference between Littelfuse Series 217 and Series 235 fuses?

A: Both series meet the 100mA 250V fast-blow specification and 5x20mm form factor. The primary differences are internal construction characteristics reflected in Melting I²t values (0.0045 for Series 217 vs. 0.00312 for Series 235) and DC cold resistance (5.6965 Ohms for Series 217 vs. 8.4 Ohms for Series 235). Series selection should be based on application-specific thermal and resistance requirements.

Q: Are there packaging differences between substitute parts?

A: The obsolete 0217.100H was supplied with standard packaging. Active substitutes are available in bulk packaging. Packaging format does not affect electrical or mechanical compatibility; it reflects current manufacturing and distribution practices.

Q: Which substitute offers the best RoHS compliance?

A: All active Littelfuse substitutes (Series 217 and 235 variants) and the Eaton BK/GMA-100-R are ROHS3 compliant. The Eaton BK/GDB-100MA is RoHS compliant. The original 0217.100H was RoHS non-compliant. Selection based on RoHS compliance should consider your specific regulatory requirements.

Q: Can I use Eaton fuses as a direct replacement for Littelfuse?

A: Yes. The Eaton BK/GDB-100MA and BK/GMA-100-R maintain identical electrical ratings (100mA, 250V, fast-blow) and physical dimensions (5x20mm). Cross-manufacturer substitution is mechanically and electrically compatible. Verify approval agency certifications against your application requirements.

Q: What inventory levels are available for these substitutes?

A: Littelfuse Series 217 variants range from 820–5500 units in stock. Littelfuse Series 235 variants range from 832–1475 units. Eaton alternatives provide 947–1321 units. Inventory levels support both immediate and volume procurement requirements.

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