Littelfuse 021502.5MXGP Ceramic Fuse 2.5A 250VAC 5x20mm - Equivalent & Substitute Parts

Part Overview

The Littelfuse 021502.5MXGP is a ceramic cartridge fuse rated for 2.5A at 250VAC, housed in a 5mm x 20mm form factor. This slow-blow fuse requires a compatible holder for installation and is designed for AC/DC applications with a breaking capacity of 1.5kA. The part is active in production with full international compliance certifications including UL, CE, CSA, VDE, CCC, KC, PSE, and SEMKO. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval agency compliance.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the 021502.5MXGP are grouped into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Littelfuse Series 215): Parts 021502.5HXP, 021502.5MXP, and 021502.5TXP are direct parametric equivalents manufactured by Littelfuse. These parts share identical electrical ratings (2.5A, 250VAC), response time (Slow Blow), mechanical dimensions (5mm x 20mm), breaking capacity (1.5kA), operating temperature range (-55°C ~ 125°C), and approval certifications. The primary difference is the internal construction variant, indicated by the middle designation (H, M, or T), which affects melting I²t characteristics but maintains functional equivalence for circuit protection applications.

Cross-Manufacturer Equivalents: Parts from SCHURTER (0001.2508, 0001.2708.11), Bel Fuse (0659C2500-12), OptiFuse (TCC-2.5A, TCD-2.5A), and Conquer (VBS UDA 2.5A 250V) meet the core electrical and mechanical requirements: 2.5A current rating, 250VAC voltage rating, ceramic cartridge construction, 5mm x 20mm dimensions, slow-blow response, and -55°C ~ 125°C operating temperature. These parts are substitutable where approval agency compliance aligns with system requirements.

Key Substitution Parameters:

Current Rating: 2.5 A (mandatory match)
Voltage Rating (AC): 250 V (mandatory match)
Package / Case: 5mm x 20mm (mandatory match)
Fuse Type: Cartridge, Ceramic (mandatory match)
Response Time: Slow Blow (mandatory match)
Operating Temperature: -55°C ~ 125°C (mandatory match)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Response Time	Package	Breaking Capacity (kA)	Melting I²t	Operating Temp (°C)	DC Cold Resistance (Ω)	Inventory (Pcs)
021502.5MXGP	Littelfuse Inc.	2.5	250	—	Slow Blow	5x20mm	1.5	22.29	-55 ~ 125	0.0386	838
021502.5HXP	Littelfuse Inc.	2.5	250	—	Slow Blow	5x20mm	1.5	22.29	-55 ~ 125	0.0386	1298
021502.5MXP	Littelfuse Inc.	2.5	250	—	Slow Blow	5x20mm	1.5	22.29	-55 ~ 125	0.0386	2300
021502.5TXP	Littelfuse Inc.	2.5	250	—	Slow Blow	5x20mm	1.5	22.29	-55 ~ 125	0.0386	1169
0001.2508	SCHURTER Inc.	2.5	250	300	Slow Blow	5x20mm	1.5	11.7	-55 ~ 125	—	1070
0001.2708.11	SCHURTER Inc.	2.5	250	300	Slow Blow	5x20mm	1.5	11.7	-55 ~ 125	—	1971
0659C2500-12	Bel Fuse Inc.	2.5	250	—	Slow Blow	5x20mm	1.5	25	-55 ~ 125	0.036	4490
TCC-2.5A	OptiFuse	2.5	250	—	Slow Blow	5x20mm	0.1	5.1183	-55 ~ 125	0.0872	1048
TCD-2.5A	OptiFuse	2.5	250	—	Slow Blow	5x20mm	1.5	—	-55 ~ 125	—	1957
VBS UDA 2.5A 250V (PF)	Conquer	2.5	250	—	Slow Blow	5x20mm	1.5	29.07	-55 ~ 125	0.0384	2066

Engineering Selection Recommendations

Littelfuse Series 215 Variants (021502.5HXP, 021502.5MXP, 021502.5TXP): These are the primary substitutes for the 021502.5MXGP. All three variants maintain identical electrical specifications, mechanical form factor, and full compliance with CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE standards. Selection among these variants depends on application-specific melting I²t requirements and internal construction preferences, all of which are equivalent at 22.29 I²t. Higher inventory availability exists for 021502.5MXP (2300 pcs).

SCHURTER SPT Series (0001.2508, 0001.2708.11): These parts provide equivalent electrical protection with the added benefit of 300VDC rating capability. Both maintain 1.5kA breaking capacity and full operating temperature range. Compliance includes CCC, cURus, KC, PSE/JET, and VDE certifications. The lower melting I²t value (11.7 versus 22.29) indicates faster thermal response, which may be advantageous in applications requiring tighter protection margins.

Bel Fuse 0659C2500-12: This part matches all core electrical and mechanical parameters with a melting I²t of 25, slightly higher than the main part. Compliance includes CCC, cURus, PSE, and VDE. Highest inventory availability (4490 pcs) among all substitutes.

OptiFuse TCD-2.5A: Provides equivalent electrical protection with 1.5kA breaking capacity and full temperature range compliance. Certifications include cURus and IEC 60127. This part is suitable for applications requiring IEC 60127 compliance.

OptiFuse TCC-2.5A: Meets electrical and mechanical requirements with cULus and UL 248 certifications. Note the reduced breaking capacity (0.1kA versus 1.5kA) and higher DC cold resistance (0.0872Ω versus 0.0386Ω). This part is suitable only for applications where lower breaking capacity is acceptable and UL 248 compliance is required.

Conquer VBS UDA 2.5A 250V (PF): Provides full parametric equivalence with the highest melting I²t value (29.07) among all substitutes. Compliance includes BSI, CCC, CSA, KC, PSE, SEMKO, UL, and VDE. This part offers the broadest international certification coverage.

Frequently Asked Questions (FAQ)

Q: Can I substitute any of these parts directly into a circuit designed for the 021502.5MXGP?

A: Yes, provided the application does not depend on specific melting I²t characteristics or breaking capacity values. All listed substitutes maintain the mandatory parameters: 2.5A current rating, 250VAC voltage rating, 5mm x 20mm mechanical form factor, slow-blow response time, and -55°C ~ 125°C operating temperature range. Verify that the holder used is compatible with the 5mm x 20mm cartridge form factor.

Q: What is the significance of melting I²t differences among these parts?

A: Melting I²t defines the thermal energy required to melt the fuse element. Lower I²t values (such as SCHURTER's 11.7) indicate faster thermal response to overcurrent conditions. Higher I²t values (such as Conquer's 29.07) allow greater tolerance for transient current spikes before fuse operation. Selection depends on the specific circuit's inrush current characteristics and protection requirements.

Q: Are there compliance differences I should consider?

A: Yes. The main part and most substitutes carry UL, CE, CSA, VDE, CCC, KC, and PSE certifications. OptiFuse TCC-2.5A is certified to cULus and UL 248 only. OptiFuse TCD-2.5A carries cURus and IEC 60127 certifications. SCHURTER parts include cURus certification. Conquer VBS UDA includes the broadest certification set including BSI. Select based on your system's required compliance standards.

Q: What is the difference between the Littelfuse variants (H, M, T)?

A: The middle designation (H, M, T) indicates internal construction variants within the Littelfuse Series 215. All three variants (021502.5HXP, 021502.5MXP, 021502.5TXP) maintain identical electrical ratings, melting I²t (22.29), breaking capacity (1.5kA), and certifications. The variants differ in internal element design but are functionally equivalent for circuit protection purposes.

Q: Can I use the SCHURTER parts in applications rated only for 250VAC?

A: Yes. The SCHURTER parts (0001.2508, 0001.2708.11) are rated for both 250VAC and 300VDC. Using a part with higher voltage capability in a lower-voltage application does not create a compatibility issue. The fuse will operate correctly at 250VAC.

Q: Why does the OptiFuse TCC-2.5A have a lower breaking capacity (0.1kA)?

A: The OptiFuse TCC-2.5A is designed for applications requiring UL 248 compliance with lower breaking capacity requirements. This part is suitable only for circuits where 0.1kA breaking capacity is sufficient. Do not use this part as a substitute if your application requires 1.5kA breaking capacity.

Q: Are all these parts RoHS3 compliant?

A: Yes. All listed parts carry ROHS3 compliance certification, confirming compliance with the Restriction of Hazardous Substances Directive.

Q: What inventory considerations should I factor into my selection?

A: Bel Fuse 0659C2500-12 offers the highest inventory (4490 pcs), followed by Littelfuse 021502.5MXP (2300 pcs) and Conquer VBS UDA (2066 pcs). If supply chain continuity is a concern, these three options provide the best availability.

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