Littelfuse 0285015.MXRP Ceramic Fuse 15A 250VAC 5x20mm - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0285015.MXRP is a 15A 250VAC ceramic cartridge fuse in 5x20mm form factor, classified as obsolete. This slow-blow fuse requires a holder for installation and is designed for general-purpose circuit protection applications. Due to its obsolete product status, identifying active equivalent and substitute parts is necessary for ongoing procurement and system maintenance.

Key Parameters

Parameter	Value
Current Rating	15 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Package / Case	5mm x 20mm
Response Time	Slow Blow
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 0285015.MXRP is determined by the following mandatory parameters:

Current Rating: 15 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)

All identified substitute parts meet these core electrical and mechanical requirements. Variations in secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and approval agencies do not disqualify substitution when primary parameters align.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Package	Response Time	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Product Status	Approval Agency
0285015.MXRP	Littelfuse Inc.	15	250	5x20mm	Slow Blow	500A	1305	0.0031	Obsolete	PSE
0215015.MXP	Littelfuse	15	250	5x20mm	Slow Blow	500A	1237	0.0033	Active	PSE, SEMKO, UL
0285015.HXP	Littelfuse Inc.	15	250	5x20mm	Slow Blow	500A	1305	0.0031	Active	PSE
0285015.MXP	Littelfuse Inc.	15	250	5x20mm	Slow Blow	500A	1305	0.0031	Active	PSE
TCC-15A	OptiFuse	15	250	5x20mm	Slow Blow	750A	534.24	0.0041	Active	cULus, UL 248
TCD-15A	OptiFuse	15	250	5x20mm	Slow Blow	1.5kA	Not Provided	Not Provided	Active	IEC 60127

Engineering Selection Recommendations

For replacement of the obsolete 0285015.MXRP, the following active alternatives are available:

Littelfuse Series 285 (Same Manufacturer, Same Series):

0285015.HXP and 0285015.MXP are direct active equivalents within the same manufacturer series. Both maintain identical electrical characteristics (15A, 250VAC, 5x20mm, slow-blow response) and are currently in active production status.

Littelfuse Series 215 (Same Manufacturer, Different Series):

0215015.MXP is an active Littelfuse alternative with expanded approval certifications (PSE, SEMKO, UL). This part maintains all core electrical parameters and offers broader regulatory compliance.

OptiFuse Alternatives (Different Manufacturer):

TCC-15A and TCD-15A are parametric equivalents from OptiFuse. Both meet all primary electrical and mechanical requirements. TCC-15A carries cULus and UL 248 certifications, while TCD-15A complies with IEC 60127 standards.

Selection should prioritize parts with active product status and certifications appropriate for the intended application's regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I use 0215015.MXP as a direct replacement for 0285015.MXRP?

A: Yes. Both parts share identical electrical ratings (15A, 250VAC), fuse type (ceramic cartridge), package dimensions (5x20mm), and response characteristics (slow-blow). The primary difference is product status (0215015.MXP is active) and expanded certifications (SEMKO, UL added).

Q: What is the difference between Littelfuse Series 285 and Series 215?

A: Series 285 and Series 215 are distinct product lines within Littelfuse's ceramic fuse portfolio. For the 15A 250VAC 5x20mm specification, both series provide equivalent electrical performance. Series 215 (0215015.MXP) includes additional regulatory approvals.

Q: Are OptiFuse TCC-15A and TCD-15A compatible with the original 0285015.MXRP?

A: Both OptiFuse parts meet the core electrical and mechanical requirements: 15A current rating, 250VAC voltage rating, 5x20mm package, ceramic cartridge type, and slow-blow response. They differ in breaking capacity and approval certifications. Compatibility depends on application-specific regulatory and performance requirements.

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

A: Melting I²t represents the thermal energy required to melt the fuse element and is a secondary characteristic that varies between manufacturers and product series. All listed substitutes maintain the same primary electrical ratings and response time classification, making them functionally equivalent for standard circuit protection applications.

Q: Does the 5x20mm package dimension apply to all substitute parts?

A: Yes. All substitute parts listed maintain the 5x20mm cartridge dimensions and require a compatible fuse holder for installation, identical to the original 0285015.MXRP.

Q: Which substitute part has the highest breaking capacity?

A: TCD-15A from OptiFuse has a breaking capacity of 1.5kA, compared to 500A for Littelfuse parts and 750A for TCC-15A. Higher breaking capacity provides enhanced protection in high-fault-current environments.

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