Littelfuse 032502.8H Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 032502.8H is a 2.8 A, 250 V AC ceramic cartridge fuse with 3AB/3AG package configuration and slow-blow response characteristics. This component is classified as obsolete, necessitating identification of active equivalent alternatives for continued circuit protection applications. Direct substitutes are available from the same manufacturer with enhanced specifications and active product status.

Key Parameters

Parameter	Specification
Current Rating	2.8 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Response Time	Slow Blow
Mounting Type	Through Hole
Breaking Capacity @ Rated Voltage	100 A
Melting I²t	170
Size / Dimension	0.275" Dia x 1.288" L (6.99mm x 32.72mm)
DC Cold Resistance	0.069 Ohms

Substitute Part Grouping Explanation

Substitution of the obsolete 032502.8H is determined by equivalence in the following critical parameters:

Current Rating: 2.8 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
Fuse Type: Cartridge, Ceramic (exact match required)
Response Time: Slow Blow (exact match required)
Mounting Type: Through Hole (exact match required)

The three substitute parts—032502.8HXP, 032502.8MXP, and 032502.8VXP—meet all critical parameter requirements. These parts are manufactured by Littelfuse Inc. and maintain identical AC voltage and current ratings, package dimensions, and response characteristics. All substitutes are active products with enhanced DC voltage ratings (125 V DC) and improved compliance certifications compared to the obsolete original part.

Parameter Comparison

Parameter	032502.8H (Original)	032502.8HXP	032502.8MXP	032502.8VXP
Current Rating (Amps)	2.8 A	2.8 A	2.8 A	2.8 A
Voltage Rating - AC	250 V	250 V	250 V	250 V
Voltage Rating - DC	Not specified	125 V	125 V	125 V
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Breaking Capacity @ Rated Voltage	100 A	100 A AC, 10 kA DC	100 A AC, 10 kA DC	100 A AC, 10 kA DC
Melting I²t	170	170	170	170
Size / Dimension	0.275" Dia x 1.288" L (6.99mm x 32.72mm)	0.275" Dia x 1.288" L (6.99mm x 32.72mm)	0.275" Dia x 1.288" L (6.99mm x 32.72mm)	0.275" Dia x 1.288" L (6.99mm x 32.72mm)
DC Cold Resistance	0.069 Ohms	0.0695 Ohms	0.0695 Ohms	0.0695 Ohms
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Operating Temperature	Not specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Approval Agency	CSA, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, KC, PSE, UL

Engineering Selection Recommendations

All three substitute parts—032502.8HXP, 032502.8MXP, and 032502.8VXP—are direct functional equivalents for the obsolete 032502.8H. Selection among these active alternatives is based on the following factors:

Product Status: All substitutes are active products with full manufacturing support, eliminating obsolescence risk associated with the original part.

Compliance and Certifications: All substitutes achieve ROHS3 compliance, addressing environmental regulatory requirements not met by the original part. The 032502.8HXP and 032502.8MXP carry identical certification bodies (CE, CSA, K-MARK, PSE, UL), while 032502.8VXP includes KC certification in place of K-MARK.

Enhanced Specifications: All substitutes provide DC voltage rating (125 V DC) and expanded operating temperature range (-55°C ~ 125°C), offering improved performance margins in applications requiring DC circuit protection or operation across extended temperature ranges.

Electrical Characteristics: DC cold resistance values are equivalent across all substitutes (0.0695 Ohms), with negligible deviation from the original specification (0.069 Ohms).

Frequently Asked Questions (FAQ)

Q: Can the 032502.8HXP, 032502.8MXP, or 032502.8VXP be used as direct replacements for the 032502.8H?

A: Yes. All three substitute parts maintain identical current rating (2.8 A), AC voltage rating (250 V), package configuration (3AB, 3AG, 1/4" x 1-1/4"), response time (slow blow), and mechanical dimensions. Direct socket compatibility is confirmed.

Q: What is the primary difference between the substitute parts and the original?

A: The original 032502.8H is obsolete. The substitutes are active products with enhanced DC voltage ratings (125 V DC), ROHS3 compliance, expanded operating temperature range (-55°C ~ 125°C), and broader international certifications.

Q: Are there differences between 032502.8HXP, 032502.8MXP, and 032502.8VXP?

A: These parts are parametrically equivalent. The primary distinction is certification body coverage: 032502.8HXP and 032502.8MXP include K-MARK certification, while 032502.8VXP includes KC certification. Selection depends on regional regulatory requirements.

Q: Will the substitutes work in circuits designed for the original 032502.8H?

A: Yes. The substitutes maintain all critical electrical parameters: current rating, AC voltage rating, response time, and melting I²t value. The enhanced DC voltage rating and operating temperature range provide additional performance margin without affecting AC circuit operation.

Q: Is the package / case identical across all parts?

A: Yes. All parts use the 3AB, 3AG, 1/4" x 1-1/4" (Axial) package with identical physical dimensions (0.275" Dia x 1.288" L / 6.99mm x 32.72mm). Through-hole mounting compatibility is confirmed.

Q: What certifications do the substitute parts carry?

A: 032502.8HXP and 032502.8MXP carry CE, CSA, K-MARK, PSE, and UL certifications. 032502.8VXP carries CE, CSA, KC, PSE, and UL certifications. All meet or exceed the original part's CSA and UL certifications.

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