Littelfuse 0218.100MXF4P Equivalent & Substitute Parts

Part Overview

The Littelfuse 0218.100MXF4P is a 100 mA, 250 V AC/DC slow-blow glass cartridge fuse in a 5mm x 20mm package format. This fuse requires a holder for installation and is designed for circuit protection applications requiring slow-blow response characteristics. The part maintains active product status with full compliance to international safety standards including UL, CE, CSA, VDE, KC, and METI certifications. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response time characteristics, and package specifications.

Key Parameters

Parameter	Value
Current Rating	100 mA
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Package / Case	5mm x 20mm
Fuse Type	Cartridge, Glass
Mounting Type	Requires Holder
Operating Temperature Range	-55°C to 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 0218.100MXF4P are grouped based on strict equivalence of the following parameters: 100 mA current rating, 250 V AC voltage rating, slow-blow response time, 5mm x 20mm physical dimensions, glass cartridge construction, and holder-based mounting. All substitute parts maintain the same operating temperature range of -55°C to 125°C and ROHS3 compliance status.

Substitutes are classified into two categories:

Littelfuse Series Equivalents: Parts 0218.100MXP, 0218.100TXP, 0219.100MXAP, and 0239.100MXP are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications with the main part.

Cross-Manufacturer Equivalents: Parts 0034.3107, 0034.5607.11 (SCHURTER Inc.), and TSD-100MA (OptiFuse) provide equivalent functionality from alternative manufacturers while maintaining the same core electrical and physical parameters.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage Rating (AC)	Response Time	Package	Breaking Capacity @ Rated Voltage	Operating Temperature	Approval Agencies	Product Status
0218.100MXF4P	Littelfuse Inc.	218	100 mA	250 V	Slow Blow	5mm x 20mm	80 A	-55°C ~ 125°C	CE, CSA, KC, METI, UL, VDE	Active
0218.100MXP	Littelfuse Inc.	218	100 mA	250 V	Slow Blow	5mm x 20mm	35 A	-55°C ~ 125°C	CCC, CE, CSA, K-MARK, SEMKO, UL, VDE	Active
0218.100TXP	Littelfuse Inc.	218	100 mA	250 V	Slow Blow	5mm x 20mm	35 A	-55°C ~ 125°C	CCC, CE, CSA, KC, SEMKO, UL, VDE	Active
0219.100MXAP	Littelfuse Inc.	219XA	100 mA	250 V	Slow Blow	5mm x 20mm	150 A	-55°C ~ 125°C	CE, SEMKO, UL	Active
0239.100MXP	Littelfuse Inc.	239	100 mA	250 V	Slow Blow	5mm x 20mm	35 A	-55°C ~ 125°C	CE, UL	Active
0034.3107	SCHURTER Inc.	FST 5x20	100 mA	250 V	Slow Blow	5mm x 20mm	35 A	-55°C ~ 125°C	CCC, cURus, VDE	Active
0034.5607.11	SCHURTER Inc.	SMD-FST	100 mA	250 V	Slow Blow	5mm x 20mm	35 A	-55°C ~ 125°C	cURus, VDE	Active
TSD-100MA	OptiFuse	TSD	100 mA	250 V	Slow Blow	5mm x 20mm	35 A	-55°C ~ 125°C	IEC 60127	Active

Engineering Selection Recommendations

All substitute parts listed maintain active product status and are ROHS3 compliant. Selection among equivalents depends on certification requirements for the target application:

Maximum Certification Coverage: The 0218.100MXF4P main part and 0218.100TXP provide the broadest approval agency coverage, including CCC, CE, CSA, KC, METI, SEMKO, UL, and VDE certifications.

Littelfuse Series Selection: Parts 0218.100MXP, 0218.100TXP, 0219.100MXAP, and 0239.100MXP are direct Littelfuse equivalents. The 0219.100MXAP offers the highest breaking capacity at 150 A. The 0239.100MXP provides a narrower certification scope (CE, UL only).

Cross-Manufacturer Options: SCHURTER parts 0034.3107 and 0034.5607.11 provide alternatives with reduced certification coverage (CCC, cURus, VDE for 0034.3107; cURus, VDE for 0034.5607.11). OptiFuse TSD-100MA is certified to IEC 60127 standard.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 0218.100MXF4P with any of the listed equivalent parts?

A: Yes. All listed parts share identical electrical ratings (100 mA, 250 V AC), response time (slow-blow), and physical dimensions (5mm x 20mm). Substitution is valid based on these core parameters. Verify that the target application's certification requirements are met by the substitute part's approval agencies.

Q: What is the difference between the main part 0218.100MXF4P and 0218.100MXP?

A: Both parts are Littelfuse Series 218 fuses with identical electrical and mechanical specifications. The primary difference is breaking capacity: 0218.100MXF4P has 80 A breaking capacity, while 0218.100MXP has 35 A. The main part also includes METI and KC certifications not present in 0218.100MXP.

Q: Why do some substitute parts have different breaking capacities?

A: Breaking capacity is a characteristic of the fuse design and does not affect substitution eligibility when electrical ratings and physical dimensions match. The 0219.100MXAP, for example, has 150 A breaking capacity compared to 35 A in other substitutes. This parameter is provided for reference but does not prevent substitution based on the core electrical and mechanical equivalence criteria.

Q: Are SCHURTER and OptiFuse parts direct equivalents to Littelfuse?

A: Yes. Parts 0034.3107, 0034.5607.11 (SCHURTER), and TSD-100MA (OptiFuse) are direct equivalents based on matching current rating, voltage rating, response time, and package dimensions. Certification coverage differs by manufacturer; verify compliance with application-specific requirements.

Q: Does the 5mm x 20mm package dimension apply to all substitute parts?

A: Yes. All substitute parts use the 5mm x 20mm cartridge format and require a holder for installation. Physical compatibility is assured across all listed equivalents.

Q: What certifications should I prioritize when selecting a substitute?

A: Certification selection depends on the target application's regulatory requirements. Applications requiring North American compliance should prioritize parts with UL certification. European applications should verify CE marking. Industrial applications may require specific agency approvals such as CSA, VDE, or CCC. Consult application documentation for mandatory certification requirements.

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