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Littelfuse 028502.5MXRP Ceramic Fuse 2.5A 250VAC 5x20mm Equivalent & Substitute Parts
Part Overview
The Littelfuse 028502.5MXRP is a ceramic cartridge fuse rated 2.5A at 250VAC, housed in a 5x20mm form factor. This component requires an external fuse holder for installation and operates across a temperature range of -55°C to 125°C with slow-blow response characteristics. The part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing procurement and system maintenance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Current Rating | 2.5 A |
| Voltage Rating (AC) | 250 V |
| Package / Case | 5mm x 20mm |
| Fuse Type | Cartridge, Ceramic |
| Response Time | Slow Blow |
| Breaking Capacity | 1.5 kA @ Rated Voltage |
| Mounting Type | Requires Holder |
| Operating Temperature | -55°C to 125°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the 028502.5MXRP is determined by strict equivalence across the following parameters:
- 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)
- Breaking Capacity: 1.5 kA @ Rated Voltage (exact match required)
Substitute parts are grouped into two categories:
Category 1: Littelfuse Series 215 (Active Status) Parts 021502.5MXP, 021502.5HXP, 021502.5MXBP, 021502.5MXGP, and 021502.5TXP meet all electrical and mechanical parameters. These represent the primary manufacturer-recommended alternatives with expanded approval agency certifications (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE).
Category 2: Littelfuse Series 285 (Active Status) Parts 028502.5HXP and 028502.5MXP share the same series designation as the original part and maintain all critical electrical and mechanical specifications while offering active product status.
Category 3: SCHURTER SPT Series (Active Status) Parts 0001.2508 and 0001.2708.11 provide parametric equivalence with extended DC voltage rating (300V DC) and alternative approval agency certifications (CCC, cURus, KC, PSE/JET, VDE).
Parameter Comparison
| Part Number | Manufacturer | Series | Current (A) | Voltage AC (V) | Voltage DC (V) | Package | Response Time | Breaking Capacity (kA) | Product Status | Melting I²t | DC Cold Resistance (Ω) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 028502.5MXRP | Littelfuse Inc. | 285 | 2.5 | 250 | — | 5x20mm | Slow Blow | 1.5 | Obsolete | 25.625 | 0.0384 |
| 021502.5MXP | Littelfuse Inc. | 215 | 2.5 | 250 | — | 5x20mm | Slow Blow | 1.5 | Active | 22.29 | 0.0386 |
| 021502.5HXP | Littelfuse Inc. | 215 | 2.5 | 250 | — | 5x20mm | Slow Blow | 1.5 | Active | 22.29 | 0.0386 |
| 021502.5MXBP | Littelfuse Inc. | 215 | 2.5 | 250 | — | 5x20mm | Slow Blow | 1.5 | Active | 22.29 | 0.0386 |
| 021502.5MXGP | Littelfuse Inc. | 215 | 2.5 | 250 | — | 5x20mm | Slow Blow | 1.5 | Active | 22.29 | 0.0386 |
| 021502.5TXP | Littelfuse Inc. | 215 | 2.5 | 250 | — | 5x20mm | Slow Blow | 1.5 | Active | 22.29 | 0.0386 |
| 021502.5VXP | Littelfuse Inc. | 215 | 2.5 | 250 | — | 5x20mm | Slow Blow | 1.5 | Active | 22.29 | 0.0386 |
| 028502.5HXP | Littelfuse | 285 | 2.5 | 250 | — | 5x20mm | Slow Blow | 1.5 | Active | 25.625 | 0.0384 |
| 028502.5MXP | Littelfuse Inc. | 285 | 2.5 | 250 | — | 5x20mm | Slow Blow | 1.5 | Active | 25.625 | 0.0384 |
| 0001.2508 | SCHURTER Inc. | SPT 5x20 | 2.5 | 250 | 300 | 5x20mm | Slow Blow | 1.5 | Active | 11.7 | — |
| 0001.2708.11 | SCHURTER Inc. | SMD-SPT | 2.5 | 250 | 300 | 5x20mm | Slow Blow | 1.5 | Active | 11.7 | — |
Engineering Selection Recommendations
Primary Recommendation: Littelfuse Series 215 (021502.5MXP)
The 021502.5MXP represents the manufacturer-recommended substitute with active product status and the broadest approval agency coverage (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE). This part maintains electrical and mechanical equivalence to the obsolete 028502.5MXRP while ensuring long-term supply availability and regulatory compliance across multiple markets.
Alternative Recommendation: Littelfuse Series 285 (028502.5HXP or 028502.5MXP)
For applications requiring continuity within the Series 285 product line, 028502.5HXP and 028502.5MXP provide direct functional equivalence with identical melting I²t and DC cold resistance characteristics. These parts maintain PSE approval and active status.
Secondary Recommendation: SCHURTER SPT Series (0001.2508 or 0001.2708.11)
SCHURTER alternatives offer extended DC voltage rating (300V DC) and alternative approval certifications (CCC, cURus, KC, PSE/JET, VDE). Selection of SCHURTER parts is appropriate when system design accommodates higher DC voltage specifications or when SCHURTER certifications align with regional compliance requirements.
Frequently Asked Questions (FAQ)
Q: Can the 028502.5MXRP be directly replaced with any of the listed substitutes?
A: Yes. All listed substitute parts meet the critical electrical and mechanical parameters: 2.5A current rating, 250VAC voltage rating, 5x20mm package, ceramic cartridge type, slow-blow response, 1.5kA breaking capacity, and holder-mount configuration. Direct replacement is electrically and mechanically valid.
Q: What is the difference between Littelfuse Series 215 and Series 285 substitutes?
A: Both series maintain identical electrical specifications for this 2.5A 250VAC application. Series 215 parts offer expanded approval agency certifications (UL, VDE, CSA, KC, CCC, SEMKO in addition to PSE). Series 285 parts maintain PSE approval only. Series 215 is recommended for applications requiring broader regulatory compliance.
Q: Are SCHURTER parts suitable replacements?
A: SCHURTER 0001.2508 and 0001.2708.11 are parametrically equivalent for the 2.5A 250VAC specification. These parts provide additional 300V DC rating capability. Selection depends on system voltage requirements and regional certification preferences (SCHURTER certifications include CCC, cURus, KC, PSE/JET, VDE).
Q: What is the significance of the melting I²t difference between parts?
A: Melting I²t values indicate thermal energy absorption before fuse element melting. The original 028502.5MXRP has I²t of 25.625, while Littelfuse Series 215 parts have I²t of 22.29, and SCHURTER parts have I²t of 11.7. All values remain within the slow-blow fuse classification for this current rating. Selection should align with circuit protection requirements and inrush current characteristics of the protected equipment.
Q: Does packaging format differ between substitutes?
A: All substitute parts maintain the 5x20mm ceramic cartridge package requiring an external fuse holder. No holder modifications are necessary for any listed substitute.
Q: What approval agencies are relevant for my application?
A: Approval agency selection depends on regional market requirements. Littelfuse Series 215 parts (021502.5MXP, 021502.5HXP, 021502.5MXBP, 021502.5MXGP, 021502.5TXP, 021502.5VXP) carry certifications for CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE. Littelfuse Series 285 parts carry PSE certification. SCHURTER parts carry CCC, cURus, KC, PSE/JET, and VDE certifications. Verify your application's regional compliance requirements before final selection.
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