Littelfuse 0218.630H Glass Cartridge Fuse 630mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0218.630H is a 630mA 250VAC glass cartridge fuse in 5x20mm form factor, classified as obsolete. This fuse requires a holder for installation and is designed for slow-blow response characteristics in AC/DC applications. Due to its obsolete status, equivalent substitute parts from active product lines are necessary to maintain design continuity and ensure ongoing component availability for new production and field replacements.

Key Parameters

Parameter	Value
Current Rating	630 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35A (main part); 35A or 150A (substitutes)
Operating Temperature Range	-55°C to 125°C
DC Cold Resistance	0.275 Ohms

Substitute Part Grouping Explanation

Substitution eligibility for the 0218.630H is determined by strict equivalence across the following critical parameters:

Current Rating: 630 mA (exact match required)
Voltage Rating: 250 V AC (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (exact match required)
Package / Case: 5x20mm (exact match required)
Mounting Type: Requires Holder (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)
DC Cold Resistance: 0.275 Ohms (exact match required)

All substitute parts listed below meet these criteria. Variations in Breaking Capacity and Melting I²t values do not disqualify substitution, as these parameters remain within acceptable operational ranges for the specified current and voltage ratings. Product status transition from obsolete to active, combined with RoHS3 compliance in substitute parts, provides improved long-term availability and regulatory alignment.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage Rating (AC)	Response Time	Package	Breaking Capacity	Melting I²t	Product Status	RoHS Status
0218.630H	Littelfuse Inc.	218	630 mA	250 V	Slow Blow	5x20mm	35A	4.8	Obsolete	RoHS non-compliant
0213.630MXBP	Littelfuse Inc.	213	630 mA	250 V	Slow Blow	5x20mm	35A	4.8	Active	ROHS3 Compliant
0213.630MXP	Littelfuse Inc.	213	630 mA	250 V	Slow Blow	5x20mm	35A	4.8	Active	ROHS3 Compliant
0213.630TXP	Littelfuse Inc.	213	630 mA	250 V	Slow Blow	5x20mm	35A	4.8	Active	ROHS3 Compliant
0218.630HXP	Littelfuse Inc.	218	630 mA	250 V	Slow Blow	5x20mm	35A	4.675	Active	ROHS3 Compliant
0218.630MXBP	Littelfuse Inc.	218	630 mA	250 V	Slow Blow	5x20mm	35A	4.675	Active	ROHS3 Compliant
0218.630MXP	Littelfuse Inc.	218	630 mA	250 V	Slow Blow	5x20mm	35A	4.675	Active	ROHS3 Compliant
0218.630TXP	Littelfuse Inc.	218	630 mA	250 V	Slow Blow	5x20mm	35A	4.675	Active	ROHS3 Compliant
0218.630VXP	Littelfuse Inc.	218	630 mA	250 V	Slow Blow	5x20mm	35A	4.675	Active	ROHS3 Compliant
0219.630MXABP	Littelfuse Inc.	219XA	630 mA	250 V	Slow Blow	5x20mm	150A	4.82	Active	ROHS3 Compliant
0219.630MXAP	Littelfuse Inc.	219XA	630 mA	250 V	Slow Blow	5x20mm	150A	4.82	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are direct parametric equivalents to the 0218.630H and are suitable for replacement in applications requiring 630mA 250VAC slow-blow glass cartridge fuses in 5x20mm form factor.

Series 213 parts (0213.630MXBP, 0213.630MXP, 0213.630TXP) provide active-status alternatives with identical electrical characteristics and melting I²t values to the original part. These are recommended for designs where series continuity is not a constraint.

Series 218 parts (0218.630HXP, 0218.630MXBP, 0218.630MXP, 0218.630TXP, 0218.630VXP) maintain the same series designation as the original 0218.630H while offering active product status and RoHS3 compliance. Melting I²t values are marginally lower (4.675 versus 4.8), remaining within acceptable operational parameters.

Series 219XA parts (0219.630MXABP, 0219.630MXAP) offer enhanced breaking capacity of 150A compared to 35A in other variants, with melting I²t of 4.82. These are suitable for applications requiring higher fault current withstand capability.

All substitute parts carry RoHS3 compliance and are manufactured by Littelfuse Inc., ensuring regulatory alignment and supply chain continuity. Approval agencies vary across part numbers; verify specific certifications (BSI, CSA, CCC, CE, UL, VDE, K-MARK, SEMKO, KC) against application requirements.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the 0218.630H?

A: Yes. All listed parts meet the critical electrical and mechanical parameters: 630mA current rating, 250V AC voltage rating, slow-blow response, 5x20mm package, and 0.275 Ohms DC cold resistance. Physical form factor and holder compatibility are identical.

Q: What is the difference between Series 213, 218, and 219XA parts?

A: Series designation reflects internal design and approval agency certifications. Series 213 and 218 parts are functionally equivalent with 35A breaking capacity. Series 219XA parts feature 150A breaking capacity, suitable for applications with higher fault current requirements. All three series meet the 630mA 250VAC specification.

Q: Why do some parts have different melting I²t values?

A: Melting I²t values of 4.8 (Series 213 and 219XA) and 4.675 (Series 218) represent minor design variations within the same current and voltage rating. Both values are acceptable for 630mA slow-blow fuses and do not affect substitution eligibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status. The original 0218.630H is RoHS non-compliant, making the active substitutes preferable for new designs and applications subject to RoHS regulations.

Q: What certifications should I verify for my application?

A: Approval agencies vary by part number. Common certifications include UL, CSA, CE, VDE, CCC, and SEMKO. Verify that the selected substitute part carries the specific certifications required by your application standards and regional regulations.

Q: Does packaging type affect substitution?

A: Packaging (bulk versus tape/reel) does not affect electrical or mechanical compatibility. Select based on your procurement and assembly requirements. All parts are functionally identical regardless of packaging format.

Q: Can I use 0219.630MXABP or 0219.630MXAP if my circuit only requires 35A breaking capacity?

A: Yes. The 150A breaking capacity of Series 219XA parts exceeds the 35A requirement and provides additional margin. These parts are fully compatible and suitable for applications designed for 35A breaking capacity.

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