Littelfuse 0219.630MXAP Glass Fuse Cartridge 630mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0219.630MXAP is a 630mA 250VAC slow-blow glass fuse cartridge in 5x20mm form factor, designed for circuit protection in AC/DC applications. This Active product requires a compatible fuse holder for installation. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval certifications to ensure direct functional interchangeability in protected circuits.

Key Parameters

Parameter	Value
Current Rating	630 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 ~ 125°C
DC Cold Resistance	0.275 Ohms
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are classified based on strict parameter matching:

Parametric Equivalents (Littelfuse Series): Parts 0213.630MXP, 0218.630HXP, 0218.630MXP, 0218.630TXP, and 0618.630MXP share identical current rating (630mA), voltage rating (250VAC), response time (Slow Blow), package dimensions (5x20mm), operating temperature range (-55°C ~ 125°C), and DC cold resistance (0.275 Ohms). These parts differ in breaking capacity and melting I²t values but maintain functional equivalence for standard circuit protection applications.

Parametric Equivalents (Cross-Manufacturer): Parts 0034.3115 (SCHURTER FST 5x20), TSC-630MA (OptiFuse), and TSD-630MA (OptiFuse) match the primary electrical and mechanical parameters: 630mA current rating, 250VAC voltage rating, Slow Blow response, 5x20mm package, and -55°C ~ 125°C operating temperature. These cross-manufacturer alternatives provide equivalent protection characteristics.

Direct Equivalent (Different Voltage Rating): Part 0034.2514 (SCHURTER FSM 5x20) matches current rating (630mA), package (5x20mm), and mounting type but includes dual voltage rating (250VAC / 125VDC) and Medium Blow response, making it suitable for applications requiring DC voltage capability.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (mA)	Voltage AC (V)	Response Time	Package	Breaking Capacity @ Rated Voltage (A)	Melting I²t	Operating Temperature (°C)	DC Cold Resistance (Ω)
0219.630MXAP	Littelfuse Inc.	630	250	Slow Blow	5x20mm	150	4.82	-55 ~ 125	0.275
0213.630MXP	Littelfuse Inc.	630	250	Slow Blow	5x20mm	35	4.8	-55 ~ 125	0.275
0218.630HXP	Littelfuse Inc.	630	250	Slow Blow	5x20mm	35	4.675	-55 ~ 125	0.275
0218.630MXP	Littelfuse Inc.	630	250	Slow Blow	5x20mm	35	4.675	-55 ~ 125	0.275
0218.630TXP	Littelfuse Inc.	630	250	Slow Blow	5x20mm	35	4.675	-55 ~ 125	0.275
0618.630MXP	Littelfuse Inc.	630	250	Slow Blow	5x20mm	35	4.675	-55 ~ 125	0.275
0034.3115	SCHURTER Inc.	630	250	Slow Blow	5x20mm	35	4.35	-55 ~ 125	Not specified
TSC-630MA	OptiFuse	630	250	Slow Blow	5x20mm	100	0.566	-55 ~ 125	Not specified
TSD-630MA	OptiFuse	630	250	Slow Blow	5x20mm	35	1.583	-55 ~ 125	Not specified
0034.2514	SCHURTER Inc.	630	250	Medium Blow	5x20mm	80	0.905	-40 ~ 85	Not specified

Engineering Selection Recommendations

Littelfuse Series Substitutes (0213.630MXP, 0218.630HXP, 0218.630MXP, 0218.630TXP, 0618.630MXP): These parts maintain full parametric equivalence with the 0219.630MXAP across all critical electrical and mechanical specifications. All are Active products with ROHS3 compliance. Selection among these variants depends on approval agency requirements: 0218.630HXP and 0218.630MXP include K-MARK certification; 0218.630TXP includes KC certification; 0618.630MXP carries UR certification. The 0219.630MXAP offers the highest breaking capacity (150A) compared to 35A for most 0218 and 0213 variants.

SCHURTER 0034.3115 (FST 5x20): This parametric equivalent provides Slow Blow response matching the main part. It carries CCC, cURus, and VDE certifications. With 10,758 units in stock, it offers high availability. Breaking capacity is 35A with melting I²t of 4.35, closely aligned with most Littelfuse 0218 series variants.

OptiFuse TSC-630MA and TSD-630MA: Both maintain 630mA, 250VAC, Slow Blow, and 5x20mm specifications. TSC-630MA features 100A breaking capacity with UL 248 and cULus approvals. TSD-630MA carries IEC 60127 approval with 35A breaking capacity. Melting I²t values differ significantly from the main part (0.566 and 1.583 respectively versus 4.82), reflecting different thermal response profiles.

SCHURTER 0034.2514 (FSM 5x20): This part differs in response time (Medium Blow versus Slow Blow) and includes dual voltage rating (250VAC / 125VDC). Operating temperature range is narrower (-40°C ~ 85°C). Use only when DC voltage protection is required and Medium Blow response is acceptable.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 0219.630MXAP with any of the listed parts?

A: Direct substitution is possible with parts matching all critical parameters: 630mA current rating, 250VAC voltage rating, Slow Blow response, 5x20mm package, and -55°C ~ 125°C operating temperature. The Littelfuse 0213.630MXP, 0218 series variants, 0618.630MXP, SCHURTER 0034.3115, OptiFuse TSC-630MA, and TSD-630MA all meet these criteria. The SCHURTER 0034.2514 is suitable only for applications requiring Medium Blow response and DC voltage capability.

Q: What is the significance of breaking capacity differences?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The 0219.630MXAP has 150A breaking capacity, while most 0218 and 0213 variants have 35A. For applications with fault currents exceeding 35A, the 0219.630MXAP or OptiFuse TSC-630MA (100A) are required. For standard low-fault-current circuits, 35A breaking capacity is sufficient.

Q: How do melting I²t values affect substitution?

A: Melting I²t characterizes thermal response and determines how quickly the fuse element melts under overcurrent. The 0219.630MXAP has 4.82 I²t. Littelfuse 0218 and 0213 variants range from 4.675 to 4.8 I²t, providing nearly identical thermal response. OptiFuse parts have significantly lower I²t values (0.566 to 1.583), resulting in faster melting and different circuit protection characteristics. Select based on circuit requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts carry ROHS3 compliance status, matching the main part specification.

Q: What approval certifications should I consider?

A: The 0219.630MXAP carries CCC, CE, CSA, SEMKO, UL, and VDE approvals. Littelfuse 0218 variants include K-MARK or KC certifications in addition to standard approvals. SCHURTER 0034.3115 carries CCC, cURus, and VDE. OptiFuse parts carry UL 248 or IEC 60127 approvals. Select based on your target market and regulatory requirements.

Q: Can I use the SCHURTER 0034.2514 as a direct replacement?

A: The 0034.2514 is not a direct replacement due to Medium Blow response (versus Slow Blow) and narrower operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C). Use only when your application specifically requires Medium Blow response and dual AC/DC voltage rating (250VAC / 125VDC).

Q: Which substitute offers the best stock availability?

A: SCHURTER 0034.3115 has the highest inventory at 10,758 units. Littelfuse 0218.630MXP and 0618.630MXP also have strong availability at 2,443 and 1,863 units respectively.

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