Littelfuse 028502.5MXP Ceramic Fuse 2.5A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 028502.5MXP is a 2.5 ampere, 250 volt AC ceramic cartridge fuse in 5mm x 20mm form factor. This slow-blow fuse is designed for circuit protection in applications requiring a holder-mounted cartridge configuration. The part is currently active in production with 705 units in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval certifications to ensure direct functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	2.5 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Package / Case	5mm x 20mm
Response Time	Slow Blow
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	1.5kA
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 028502.5MXP is determined by the following critical parameters:

Primary Matching Criteria:

Current Rating: 2.5 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Ceramic (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 ~ 125°C (minimum requirement)
Breaking Capacity @ Rated Voltage: 1.5kA (minimum requirement)
RoHS3 Compliance (environmental requirement)

All substitute parts listed meet these criteria and are therefore electrically and mechanically interchangeable with the 028502.5MXP in holder-mounted circuit protection applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Package	Response Time	Breaking Capacity (kA)	Melting I²t	DC Cold Resistance (Ω)	Operating Temp (°C)	RoHS Status	Inventory (Pcs)
028502.5MXP	Littelfuse Inc.	2.5	250	5x20mm	Slow Blow	1.5	25.625	0.0384	-55 ~ 125	ROHS3	705
021502.5HXP	Littelfuse Inc.	2.5	250	5x20mm	Slow Blow	1.5	22.29	0.0386	-55 ~ 125	ROHS3	1298
021502.5MXP	Littelfuse Inc.	2.5	250	5x20mm	Slow Blow	1.5	22.29	0.0386	-55 ~ 125	ROHS3	2300
021502.5TXP	Littelfuse Inc.	2.5	250	5x20mm	Slow Blow	1.5	22.29	0.0386	-55 ~ 125	ROHS3	1169
0001.2708.11	SCHURTER Inc.	2.5	250	5x20mm	Slow Blow	1.5	11.7	—	-55 ~ 125	ROHS3	1971
0659C2500-12	Bel Fuse Inc.	2.5	250	5x20mm	Slow Blow	1.5	25	0.036	-55 ~ 125	ROHS3	4490
TCC-2.5A	OptiFuse	2.5	250	5x20mm	Slow Blow	0.1	5.1183	0.0872	-55 ~ 125	ROHS3	1048
TCD-2.5A	OptiFuse	2.5	250	5x20mm	Slow Blow	1.5	—	—	-55 ~ 125	ROHS3	1957
VBS UDA 2.5A 250V (PF)	Conquer	2.5	250	5x20mm	Slow Blow	1.5	29.07	0.0384	-55 ~ 125	ROHS3	2066

Engineering Selection Recommendations

Littelfuse Series 215 Substitutes (021502.5HXP, 021502.5MXP, 021502.5TXP): These parts are direct Littelfuse alternatives within the Series 215 line. All three carry expanded approval certifications (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE) compared to the 028502.5MXP (PSE only). The 021502.5MXP offers the highest inventory availability at 2300 units. Melting I²t values are slightly lower (22.29 vs. 25.625), indicating marginally faster thermal response within the slow-blow classification.

SCHURTER 0001.2708.11: This substitute provides dual voltage capability (250V AC / 300V DC) with CCC, cURus, and VDE certifications. The melting I²t of 11.7 represents the fastest thermal response among all substitutes, suitable for applications requiring tighter thermal protection margins.

Bel Fuse 0659C2500-12: This part matches the original melting I²t specification (25 vs. 25.625) most closely, ensuring equivalent thermal response characteristics. Certifications include CCC, cURus, PSE, and VDE. Inventory availability is highest at 4490 units.

OptiFuse TCD-2.5A: This substitute meets all primary electrical and mechanical criteria with cURus and IEC 60127 certifications. Inventory is 1957 units. Use this option when IEC 60127 compliance is specifically required.

OptiFuse TCC-2.5A: This part carries cULus and UL 248 certifications. The breaking capacity is specified at 100A rather than 1.5kA, and melting I²t is significantly lower (5.1183). Select this substitute only when UL 248 certification is a mandatory requirement and the lower breaking capacity is acceptable for the application.

Conquer VBS UDA 2.5A 250V (PF): This substitute provides the broadest certification coverage (BSI, CCC, CSA, KC, PSE, SEMKO, UL, VDE) and matches the original DC cold resistance specification (0.0384 Ω). The melting I²t of 29.07 represents the slowest thermal response, suitable for applications with higher inrush current tolerance.

Frequently Asked Questions (FAQ)

Q: Can I substitute any of these parts for the 028502.5MXP in my circuit?

A: Yes, all listed parts are electrically and mechanically interchangeable. They share identical current ratings (2.5A), voltage ratings (250V AC), package dimensions (5x20mm), response characteristics (slow-blow), and mounting requirements (holder-mounted). Verify that your application's approval certification requirements are met by the substitute part.

Q: What is the difference between these substitutes if they all have the same current and voltage ratings?

A: While electrical ratings are identical, substitutes differ in melting I²t values, breaking capacity, DC cold resistance, and approval certifications. Melting I²t determines thermal response speed within the slow-blow classification. Breaking capacity indicates the maximum fault current the fuse can safely interrupt. DC cold resistance affects voltage drop under normal operation. Select based on your specific certification requirements and thermal protection needs.

Q: Why do some substitutes have lower melting I²t values?

A: Melting I²t is a thermal characteristic that defines how quickly a fuse responds to overcurrent. Lower values indicate faster thermal response. The 028502.5MXP has a melting I²t of 25.625. Substitutes with lower values (such as SCHURTER at 11.7 or OptiFuse TCC at 5.1183) provide tighter thermal protection, while those with higher values (such as Conquer at 29.07) tolerate higher inrush currents. Choose based on your circuit's inrush current profile and protection requirements.

Q: What does breaking capacity mean, and why does it vary?

A: Breaking capacity is the maximum fault current a fuse can safely interrupt without rupturing or creating a hazard. The 028502.5MXP specifies 1.5kA. Most substitutes match this specification. The OptiFuse TCC-2.5A specifies 100A, which is lower. Use the TCC-2.5A only if your circuit's maximum fault current does not exceed 100A.

Q: Which substitute should I choose if I need the broadest international certification coverage?

A: The Conquer VBS UDA 2.5A 250V (PF) carries the most comprehensive certification set: BSI, CCC, CSA, KC, PSE, SEMKO, UL, and VDE. This part is suitable for applications requiring multi-regional compliance.

Q: Are there any substitutes with enhanced DC voltage capability?

A: Yes, the SCHURTER 0001.2708.11 is rated for both 250V AC and 300V DC, providing dual-voltage operation. All other substitutes are specified for AC operation. Select the SCHURTER part if your application requires DC voltage protection.

Q: How do I know which substitute has the best inventory availability?

A: The Bel Fuse 0659C2500-12 has the highest inventory at 4490 units, followed by the Littelfuse 021502.5MXP at 2300 units. Check current stock levels with your supplier for real-time availability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message