Littelfuse 0219.400MXAP Glass Cartridge Fuse 400mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0219.400MXAP is a 400mA 250VAC slow blow glass cartridge fuse in 5x20mm form factor, requiring a holder for installation. This component is classified as Active product status and is designed for circuit protection applications requiring slow blow response characteristics. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response time classification, and approval certifications to ensure functional interchangeability in protected circuit applications.

Key Parameters

Parameter	Value
Current Rating	400 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

Substitution eligibility is determined by the following criteria applied strictly to the provided parameters:

Primary Matching Criteria:

Current Rating: 400 mA (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (exact match required)
Mounting Type: Requires Holder (exact match required)

Secondary Compatibility Factors:

Operating Temperature Range: -55°C to 125°C or wider
RoHS3 Compliance: Required
Product Status: Active

All substitute parts listed below meet these primary matching criteria. Variations in breaking capacity, melting I²t, DC cold resistance, and approval agencies are noted but do not disqualify substitution when primary electrical and mechanical parameters align.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (mA)	Voltage AC (V)	Response Time	Package	Breaking Capacity @ Rated Voltage (A)	Melting I²t	DC Cold Resistance (Ω)	Operating Temp (°C)
0219.400MXAP	Littelfuse Inc.	400	250	Slow Blow	5x20mm	150	1.4	0.535	-55 to 125
0213.400MXP	Littelfuse	400	250	Slow Blow	5x20mm	35	1.36	0.535	-55 to 125
0218.400HXP	Littelfuse Inc.	400	250	Slow Blow	5x20mm	35	1.325	0.535	-55 to 125
0218.400MXP	Littelfuse Inc.	400	250	Slow Blow	5x20mm	35	1.325	0.535	-55 to 125
0239.400HXP	Littelfuse Inc.	400	250	Slow Blow	5x20mm	35	1.49	1.475	-55 to 125
0239.400MXP	Littelfuse Inc.	400	250	Slow Blow	5x20mm	35	1.49	1.475	-55 to 125
0034.2512	SCHURTER Inc.	400	250	Medium Blow	5x20mm	80	0.632	N/A	-40 to 85
0034.3113	SCHURTER Inc.	400	250	Slow Blow	5x20mm	35	0.768	N/A	-55 to 125
0034.5613.11	SCHURTER Inc.	400	250	Slow Blow	5x20mm	35	0.768	N/A	-55 to 125
TSC-400MA	OptiFuse	400	250	Slow Blow	5x20mm	100	1.2604	N/A	-55 to 125
TSD-400MA	OptiFuse	400	250	Slow Blow	5x20mm	35	0.7968	N/A	-55 to 125

Engineering Selection Recommendations

Littelfuse Series (0213, 0218, 0239): All Littelfuse substitute parts maintain the 400mA 250VAC slow blow classification with identical 5x20mm packaging. The 0218 series (0218.400HXP, 0218.400MXP) and 0239 series (0239.400HXP, 0239.400MXP) are direct functional equivalents with full Active product status. All carry comprehensive approval certifications including CCC, CE, CSA, and UL. The 0213.400MXP provides equivalent performance with BSI, CCC, CE, CSA, SEMKO, UR, and VDE approvals.

SCHURTER Series (0034): The 0034.3113 and 0034.5613.11 are slow blow equivalents with matching electrical parameters and operating temperature range. Both carry CCC, cURus, and VDE certifications. The 0034.2512 operates as a medium blow alternative with 125V DC rating and -40°C to 85°C operating range, suitable only where medium blow response is acceptable and lower temperature operation is not required.

OptiFuse Series (TSC, TSD): The TSC-400MA and TSD-400MA maintain slow blow response with 400mA 250VAC ratings. TSC-400MA features higher breaking capacity (100A) with cULus and UL 248 approvals. TSD-400MA provides IEC 60127 compliance with 35A breaking capacity. Both support the full -55°C to 125°C operating range.

Selection Priority: For direct replacement without circuit redesign, prioritize parts with matching response time (slow blow), identical operating temperature range (-55°C to 125°C), and equivalent approval certifications to the original specification.

Frequently Asked Questions (FAQ)

Q: Can 0034.2512 replace 0219.400MXAP directly? A: No. The 0034.2512 is classified as medium blow response, while the 0219.400MXAP is slow blow. Additionally, the 0034.2512 operates only to 85°C maximum, compared to 125°C for the main part. Use only where medium blow response is specified and lower temperature operation is acceptable.

Q: Are all listed substitutes mechanically compatible with existing fuse holders? A: Yes. All substitute parts maintain the 5x20mm cartridge form factor and require holder mounting, ensuring mechanical compatibility with existing installations designed for this package size.

Q: What is the significance of breaking capacity differences? A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt at rated voltage. The 0219.400MXAP specifies 150A breaking capacity, while most substitutes specify 35A. Selection should confirm that the substitute's breaking capacity meets or exceeds the circuit's maximum available fault current.

Q: Do all substitutes carry the same approval certifications? A: No. Approval certifications vary by manufacturer and series. The 0219.400MXAP carries CCC, CE, CSA, SEMKO, UL, and VDE approvals. Verify that substitute certifications meet your application's regulatory requirements before selection.

Q: Can OptiFuse parts replace Littelfuse parts in the same application? A: Yes, provided electrical parameters match (400mA, 250VAC, slow blow, 5x20mm) and approval certifications satisfy regulatory requirements. OptiFuse TSC-400MA and TSD-400MA meet these criteria with appropriate certifications.

Q: What does ROHS3 compliance indicate? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitutes maintain ROHS3 compliance.

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