Littelfuse 0285020.HXP Ceramic Fuse 20A 250VAC 5x20mm - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0285020.HXP is an active ceramic cartridge fuse rated for 20A at 250VAC with slow-blow response characteristics. This fuse is designed for applications requiring circuit protection in 5mm x 20mm form factor with holder mounting. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional performance parameters.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the 0285020.HXP are qualified based on the following critical parameters:

Current Rating: 20 A (exact match required)
Voltage Rating: 250 VAC (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)
Operating Temperature Range: -55°C to 125°C (exact match required)

All identified substitutes meet these core electrical and mechanical parameters, ensuring direct functional equivalence in circuit protection applications.

Parameter Comparison

Parameter	0285020.HXP (Littelfuse)	0215020.MXP (Littelfuse)	TCC-20A (OptiFuse)	TUC UDA 20A 250V (PF) (Conquer)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	OptiFuse	Conquer
Current Rating (Amps)	20 A	20 A	20 A	20 A
Voltage Rating - AC	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Package / Case	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
Mounting Type	Requires Holder	Requires Holder	Requires Holder	Requires Holder
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Breaking Capacity @ Rated Voltage	400A	400A	200A	400A
Melting I²t	2792	2600	959.4	1687
DC Cold Resistance (Ohms)	0.0024	0.0023	0.0028	0.0023
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance. Selection among these equivalents should be based on the following factors:

Littelfuse 0215020.MXP: Littelfuse manufacturer with PSE, SEMKO, and UL approvals. Melting I²t of 2600 and breaking capacity of 400A. Higher inventory availability (1435 pcs).

OptiFuse TCC-20A: OptiFuse manufacturer with UL 248 approval. Melting I²t of 959.4 and breaking capacity of 200A. Lower breaking capacity specification compared to other options.

Conquer TUC UDA 20A 250V (PF): Conquer manufacturer with cURus and TUV approvals. Melting I²t of 1687 and breaking capacity of 400A. Highest inventory availability (1813 pcs).

All parts meet the core electrical and mechanical requirements for direct substitution in 20A 250VAC 5x20mm ceramic fuse applications.

Frequently Asked Questions (FAQ)

Q: Can these substitute parts be used interchangeably with the 0285020.HXP?

A: Yes. All listed substitutes match the critical parameters: 20A current rating, 250VAC voltage rating, 5mm x 20mm package, ceramic cartridge type, slow-blow response, and -55°C to 125°C operating temperature range. They are functionally equivalent for circuit protection applications.

Q: What is the significance of the Breaking Capacity specification?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt at rated voltage. The 0285020.HXP and most substitutes are rated for 400A breaking capacity, except TCC-20A which is rated for 200A. This parameter should be verified against application requirements.

Q: What does Melting I²t represent?

A: Melting I²t is a thermal characteristic that describes the fuse's response to overcurrent conditions. Variations in this parameter among substitutes reflect differences in internal fuse element design. The 0285020.HXP has a Melting I²t of 2792, while substitutes range from 959.4 to 2600.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance status of the 0285020.HXP.

Q: What approval agencies certify these fuses?

A: The 0285020.HXP carries PSE approval. Substitute parts carry certifications from PSE, SEMKO, UL, UL 248, cURus, and TUV, depending on manufacturer and product line.

Q: Does package size remain identical across all substitutes?

A: Yes. All substitute parts maintain the 5mm x 20mm (0.205" Dia x 0.787" L) package dimension, ensuring mechanical compatibility with existing fuse holders.

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