Littelfuse 0215004.MXP Ceramic Fuse 4A 250VAC 5x20mm - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0215004.MXP is a 4A 250VAC ceramic cartridge fuse in 5x20mm form factor, designed for AC/DC applications requiring slow-blow response characteristics. This Active product is widely used in industrial and consumer electronics for circuit protection. Finding equivalent and substitute parts is necessary to ensure supply chain continuity, optimize inventory management, and maintain design flexibility across manufacturing environments.

Key Parameters

Parameter	Value
Current Rating	4 A
Voltage Rating (AC)	250 V
Package / Case	5mm x 20mm
Fuse Type	Cartridge, Ceramic
Response Time	Slow Blow
Breaking Capacity @ Rated Voltage	1.5kA
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 0215004.MXP is determined by the following critical parameters:

Current Rating: Must be 4 A
Voltage Rating (AC): Must be 250 V minimum
Package / Case: Must be 5mm x 20mm
Fuse Type: Must be Cartridge, Ceramic
Response Time: Must be Slow Blow
Mounting Type: Must require holder compatibility

Parts are grouped into three categories:

Parametric Equivalents (Littelfuse Series 215): 0215004.HXP, 0215004.TXP, and 0215004.VXP share identical electrical and mechanical specifications with the main part, differing only in packaging designation or internal construction variants.

Direct Manufacturer Equivalents (Cross-Manufacturer): 0001.2510 (SCHURTER), 5HT 4-R (Bel Fuse), 0001.2710.11 (SCHURTER), 0659C4000-12 (Bel Fuse), and BK1/S505-4-R (Eaton) meet all critical parameters with manufacturer-specific part numbering.

Parametric Equivalents (Alternative Manufacturers): TCC-4A and TCD-4A (OptiFuse) meet core electrical and mechanical requirements with variations in breaking capacity or approval agencies.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Package	Breaking Capacity	Melting I²t	DC Cold Resistance (Ω)	Operating Temp (°C)	Product Status
0215004.MXP	Littelfuse Inc.	4	250	—	5x20mm	1.5kA	46.96	0.0185	-55 ~ 125	Active
0215004.HXP	Littelfuse Inc.	4	250	—	5x20mm	1.5kA	46.96	0.0185	-55 ~ 125	Active
0215004.TXP	Littelfuse Inc.	4	250	—	5x20mm	1.5kA	46.96	0.0185	-55 ~ 125	Active
0215004.VXP	Littelfuse Inc.	4	250	—	5x20mm	1.5kA	46.96	0.0185	-55 ~ 125	Active
0001.2510	SCHURTER Inc.	4	250	150	5x20mm	1.5kA	62.4	—	-55 ~ 125	Active
5HT 4-R	Bel Fuse Inc.	4	250	—	5x20mm	1.5kA	56	0.03	-55 ~ 125	Active
BK1/S505-4-R	Eaton - Electronics Division	4	250	—	5x20mm	1.5kA	38.45	0.0185	—	Active
0001.2710.11	SCHURTER Inc.	4	250	150	5x20mm	1.5kA	62.4	—	-55 ~ 125	Active
0659C4000-12	Bel Fuse Inc.	4	250	—	5x20mm	1.5kA	51.2	0.016	-55 ~ 125	Active
TCC-4A	OptiFuse	4	250	—	5x20mm	200A	24.023	0.041	-55 ~ 125	Active
TCD-4A	OptiFuse	4	250	—	5x20mm	1.5kA	—	—	-55 ~ 125	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and meet the core electrical and mechanical requirements of the 0215004.MXP. Selection should be based on the following criteria:

Littelfuse Series 215 Variants (0215004.HXP, 0215004.TXP, 0215004.VXP): These are direct parametric equivalents with identical specifications. Selection among these variants depends on packaging designation and internal construction requirements specific to your application.

SCHURTER SPT Series (0001.2510, 0001.2710.11): These parts provide dual voltage capability (250V AC / 150V DC) and are suitable for applications requiring DC voltage protection. The higher melting I²t value (62.4) indicates slightly different thermal response characteristics compared to the main part.

Bel Fuse 5HT and 0659C Series (5HT 4-R, 0659C4000-12): These cross-manufacturer alternatives meet all critical parameters. The 5HT 4-R has a slightly higher DC cold resistance (0.03Ω vs 0.0185Ω), while the 0659C4000-12 offers lower resistance (0.016Ω).

Eaton S505 Series (BK1/S505-4-R): This part is manufacturer-recommended and provides equivalent performance with a lower melting I²t value (38.45), indicating faster thermal response within the slow-blow category.

OptiFuse TCC and TCD Series (TCC-4A, TCD-4A): These alternatives meet core requirements but differ in breaking capacity specifications. TCC-4A has a reduced breaking capacity (200A vs 1.5kA), while TCD-4A maintains 1.5kA breaking capacity.

All parts are ROHS3 compliant and suitable for equivalent circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute 0215004.MXP with any of the listed parts without circuit redesign?

A: Yes, all listed parts meet the critical substitution parameters: 4A current rating, 250V AC voltage rating, 5x20mm package, ceramic cartridge type, and slow-blow response. However, variations in melting I²t and breaking capacity may affect thermal response timing in specific circuit designs. Verify application requirements before substitution.

Q: What is the difference between parametric equivalents and direct manufacturer equivalents?

A: Parametric equivalents (0215004.HXP, 0215004.TXP, 0215004.VXP) are variants within the same manufacturer's product line with identical electrical specifications. Direct manufacturer equivalents (0001.2510, 5HT 4-R, BK1/S505-4-R) are cross-manufacturer parts that meet the same electrical and mechanical requirements but use different part numbering systems.

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

A: Melting I²t is a thermal characteristic that determines how quickly a fuse responds to overcurrent conditions. Variations in this parameter reflect differences in internal fuse element design and material composition between manufacturers. Parts with lower I²t values respond faster to thermal stress, while higher values indicate slower thermal response. Select based on your circuit's overcurrent protection requirements.

Q: Are SCHURTER parts (0001.2510, 0001.2710.11) compatible with AC-only applications?

A: Yes. These parts are rated for 250V AC and 150V DC. They are fully compatible with AC-only applications and provide additional DC voltage protection capability if needed in future design iterations.

Q: What is the significance of DC cold resistance differences?

A: DC cold resistance affects voltage drop across the fuse during normal operation. Lower resistance (0.0185Ω, 0.016Ω) results in minimal voltage drop, while higher resistance (0.03Ω, 0.041Ω) may introduce measurable voltage drop in low-voltage, high-current circuits. Select based on your circuit's voltage drop tolerance specifications.

Q: Can I use TCC-4A (OptiFuse) as a direct replacement for 0215004.MXP?

A: TCC-4A meets all core electrical and mechanical parameters but has a reduced breaking capacity (200A vs 1.5kA). This part is suitable for applications where the lower breaking capacity is acceptable. Verify your circuit's fault current requirements before substitution.

Q: Do all substitute parts require the same holder as the main part?

A: Yes. All listed parts are 5x20mm ceramic cartridge fuses requiring a holder. They are mechanically compatible with standard 5x20mm fuse holders. Verify holder compatibility with your specific equipment design.

Q: Which substitute part has the best inventory availability?

A: According to current stock levels, 0215004.HXP (22,918 pcs) and 0659C4000-12 (21,636 pcs) have the highest inventory availability among substitute options.

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