Littelfuse 0219.315MXAP Glass Cartridge Fuse 315mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0219.315MXAP is a 315mA 250VAC slow-blow glass cartridge fuse in 5x20mm form factor, designed for circuit protection in AC/DC applications. This part is active and in production. Equivalent and substitute parts may be required due to supply chain considerations, regional availability, or specific application requirements where alternative manufacturers or series variants meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Current Rating	315 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (315mA), AC voltage rating (250V), fuse type (cartridge glass), response time (slow blow), physical package (5x20mm), and mounting configuration (requires holder). All listed substitutes meet these core electrical and mechanical requirements. Variations in breaking capacity, melting I²t, DC voltage rating, operating temperature range, and approval agencies are noted but do not disqualify substitution where the primary parameters align.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (mA)	Voltage AC (V)	Response Time	Package	Breaking Capacity @ Rated Voltage (A)	Melting I²t	Operating Temperature (°C)	Approval Agency
0219.315MXAP	Littelfuse Inc.	219XA	315	250	Slow Blow	5x20mm	150	1.23	-55 ~ 125	CCC, CE, CSA, SEMKO, UL, VDE
0213.315MXP	Littelfuse Inc.	213	315	250	Slow Blow	5x20mm	35	1.14	-55 ~ 125	BSI, CCC, CE, CSA, SEMKO, UR, VDE
0218.315MXP	Littelfuse Inc.	218	315	250	Slow Blow	5x20mm	35	1.11	-55 ~ 125	CCC, CE, CSA, K-MARK, SEMKO, UL, VDE
0034.2511	SCHURTER Inc.	FSM 5x20	315	250	Medium Blow	5x20mm	80	0.268	-40 ~ 85	Not specified
0034.3112	SCHURTER Inc.	FST 5x20	315	250	Slow Blow	5x20mm	35	0.544	-55 ~ 125	CCC, cURus, VDE
0034.5612.11	SCHURTER Inc.	SMD-FST	315	250	Slow Blow	5x20mm	35	0.544	-55 ~ 125	cURus, VDE
0034.5708.11	SCHURTER Inc.	SMD-FTT	315	250	Slow Blow	5x20mm	35	4.17	-55 ~ 125	cURus
TSC-315MA	OptiFuse	TSC	315	250	Slow Blow	5x20mm	100	0.5257	-55 ~ 125	cULus, UL 248
TSD-315MA	OptiFuse	TSD	315	250	Slow Blow	5x20mm	35	0.4833	-55 ~ 125	IEC 60127

Engineering Selection Recommendations

All listed substitute parts maintain the core electrical specifications (315mA, 250VAC, slow-blow response, 5x20mm package) required for direct substitution with the 0219.315MXAP. Selection among substitutes should be based on:

Littelfuse 0213.315MXP and 0218.315MXP are Littelfuse series variants offering continuity within the same manufacturer ecosystem. Both maintain full operating temperature range (-55°C to 125°C) and carry comprehensive approval certifications including UL, CE, and VDE.

SCHURTER 0034.3112 (FST 5x20) and 0034.5612.11 (SMD-FST) provide slow-blow equivalents with identical operating temperature range and CCC/VDE compliance. The 0034.2511 (FSM 5x20) operates at medium-blow response and reduced temperature range (-40°C to 85°C), suitable only where medium-blow characteristics are acceptable.

OptiFuse TSC-315MA and TSD-315MA both maintain the full -55°C to 125°C operating range and slow-blow response. TSC-315MA carries UL 248 certification; TSD-315MA carries IEC 60127 certification.

Product status is active for all listed parts, ensuring ongoing availability and support.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 0219.315MXAP with any of these parts directly?

A: Yes, all listed parts are parametric equivalents meeting the core specifications: 315mA current rating, 250VAC voltage rating, slow-blow response (except 0034.2511 which is medium-blow), 5x20mm package, and cartridge glass fuse type. Physical and electrical compatibility is maintained.

Q: What is the difference between the Littelfuse 219XA series and the 213/218 series?

A: All three Littelfuse series (219XA, 213, 218) meet the same electrical specifications for this 315mA 250VAC application. The 219XA has a higher breaking capacity (150A) compared to 213 and 218 (both 35A). Series selection depends on application breaking capacity requirements.

Q: Why does the SCHURTER 0034.2511 have "Medium Blow" response instead of "Slow Blow"?

A: The 0034.2511 is classified as medium-blow, which differs from the slow-blow response of the main part. This part should only be selected if medium-blow response is acceptable for the application. It also has a reduced operating temperature range (-40°C to 85°C) compared to the -55°C to 125°C of the main part.

Q: Are all these parts RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, meeting environmental compliance requirements.

Q: What approval certifications should I prioritize?

A: The main part 0219.315MXAP carries CCC, CE, CSA, SEMKO, UL, and VDE certifications. Littelfuse 0213.315MXP and 0218.315MXP maintain similar multi-agency approval. For applications requiring specific regional certifications, verify that the selected substitute carries the required approvals for your market.

Q: Can I use these parts interchangeably in the same holder?

A: Yes. All substitute parts share the identical 5x20mm physical dimensions (0.205" diameter x 0.787" length) and require the same holder type, ensuring mechanical compatibility.

Q: What is the significance of melting I²t values?

A: Melting I²t indicates the thermal energy required to melt the fuse element. Variations in this parameter reflect differences in fuse element design and material composition between manufacturers and series. The main part 0219.315MXAP has a melting I²t of 1.23, while substitutes range from 0.268 to 4.17. These differences do not affect substitution eligibility but may influence performance in specific circuit conditions.

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