Littelfuse 0218004.H Glass Cartridge Fuse 4A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0218004.H is a 4A 250VAC glass cartridge fuse with slow-blow response characteristics, designed for 5x20mm fuse holders. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs. The fuse provides overcurrent protection in AC and DC circuits with a 40A breaking capacity at rated voltage and operates across a temperature range of -55°C to 125°C.

Key Parameters

Parameter	Value
Current Rating	4 A
Voltage Rating (AC)	250 V
Response Time	Slow Blow
Package / Case	5mm x 20mm
Fuse Type	Cartridge, Glass
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	40 A
Operating Temperature Range	-55°C to 125°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 0218004.H is determined by strict equivalence across the following parameters:

Current Rating: 4 A (exact match required)
Voltage Rating: 250 V AC (exact match required)
Response Time: Slow 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)
Operating Temperature Range: -55°C to 125°C (exact match required)

All substitute parts listed maintain these core electrical and mechanical parameters. Differences in melting I²t values, DC cold resistance, breaking capacity variations, and approval agency certifications do not disqualify substitution when the above parameters are identical.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage Rating (AC)	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	Operating Temperature	Product Status	RoHS Status
0218004.H	Littelfuse Inc.	218	4 A	250 V	Slow Blow	5mm x 20mm	40 A	-55°C ~ 125°C	Obsolete	RoHS non-compliant
0213004.MXBP	Littelfuse Inc.	213	4 A	250 V	Slow Blow	5mm x 20mm	40 A	-55°C ~ 125°C	Active	ROHS3 Compliant
0213004.MXP	Littelfuse Inc.	213	4 A	250 V	Slow Blow	5mm x 20mm	40 A	-55°C ~ 125°C	Active	ROHS3 Compliant
0213004.TXP	Littelfuse Inc.	213	4 A	250 V	Slow Blow	5mm x 20mm	40 A	-55°C ~ 125°C	Active	ROHS3 Compliant
0218004.HXP	Littelfuse Inc.	218	4 A	250 V	Slow Blow	5mm x 20mm	40 A	-55°C ~ 125°C	Active	ROHS3 Compliant
0218004.MXBP	Littelfuse Inc.	218	4 A	250 V	Slow Blow	5mm x 20mm	40 A	-55°C ~ 125°C	Active	ROHS3 Compliant
0218004.MXF11P	Littelfuse Inc.	218	4 A	250 V	Slow Blow	5mm x 20mm	40 A	-55°C ~ 125°C	Active	ROHS3 Compliant
0218004.MXP	Littelfuse Inc.	218	4 A	250 V	Slow Blow	5mm x 20mm	40 A	-55°C ~ 125°C	Active	ROHS3 Compliant
0218004.TXP	Littelfuse Inc.	218	4 A	250 V	Slow Blow	5mm x 20mm	40 A	-55°C ~ 125°C	Active	ROHS3 Compliant
0218004.VXP	Littelfuse Inc.	218	4 A	250 V	Slow Blow	5mm x 20mm	40 A	-55°C ~ 125°C	Active	ROHS3 Compliant
0219004.MXABP	Littelfuse Inc.	219XA	4 A	250 V	Slow Blow	5mm x 20mm	150 A	-55°C ~ 125°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For replacement of the obsolete 0218004.H, the following active alternatives are available from Littelfuse Inc.:

Series 218 Active Alternatives (Same Series):

0218004.HXP, 0218004.MXBP, 0218004.MXF11P, 0218004.MXP, 0218004.TXP, 0218004.VXP

These parts maintain the original Series 218 design while offering ROHS3 compliance and active product status. All maintain identical electrical and mechanical specifications.

Series 213 Active Alternatives (Different Series):

0213004.MXBP, 0213004.MXP, 0213004.TXP

These parts provide equivalent functionality with ROHS3 compliance and active product status. Series 213 fuses are functionally interchangeable based on the specified parameters.

Series 219XA Alternative (Enhanced Breaking Capacity):

0219004.MXABP

This part maintains all core electrical and mechanical parameters but provides a higher breaking capacity of 150A at rated voltage compared to the standard 40A. Selection of this part should be based on system requirements for breaking capacity.

All substitute parts are RoHS3 compliant and carry active product status, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the 0218004.H?

A: Yes, all listed substitute parts maintain identical current rating (4A), voltage rating (250V AC), response time (Slow Blow), package dimensions (5x20mm), and operating temperature range (-55°C to 125°C). They are electrically and mechanically equivalent for the specified application.

Q: What is the difference between Series 218 and Series 213 fuses?

A: Both series maintain the same electrical and mechanical parameters for this 4A 250V application. The primary difference is product lineage and certification portfolio. Series 213 parts are newer designs with ROHS3 compliance, while Series 218 parts represent the original design family.

Q: Why does the 0219004.MXABP have a different breaking capacity (150A vs 40A)?

A: The 0219004.MXABP is from the Series 219XA family, which is designed for applications requiring higher breaking capacity. While it maintains all other electrical and mechanical parameters, the enhanced breaking capacity may be relevant for specific circuit protection requirements. Verify that your application can accommodate this higher breaking capacity specification.

Q: Are all substitute parts RoHS compliant?

A: Yes, all active substitute parts listed are ROHS3 compliant. The original 0218004.H is RoHS non-compliant. If RoHS compliance is a requirement for your application, any of the active substitute parts will satisfy this requirement.

Q: What does the suffix designation (HXP, MXBP, MXP, TXP, VXP) indicate?

A: The suffix designations represent different packaging and certification variants within the same electrical specification. All variants maintain the core 4A 250V slow-blow characteristics and 5x20mm form factor. Selection among these variants should be based on packaging requirements and available inventory.

Q: Can I substitute the 0218004.H in existing equipment without modification?

A: Yes, any substitute part listed maintains the same 5x20mm form factor and requires the same holder type. Direct substitution is possible without mechanical or electrical modifications to the equipment.

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