Littelfuse 0325008.H Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0325008.H is an 8A 250VAC ceramic cartridge fuse in the 3AB/3AG form factor (1/4" x 1-1/4" axial). This part is classified as obsolete, making equivalent substitutes necessary for ongoing system maintenance and new designs. The fuse provides slow-blow response characteristics suitable for applications requiring transient current tolerance before circuit protection activation.

Key Parameters

Parameter	Value
Current Rating	8 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Breaking Capacity @ Rated Voltage	400A
Melting I²t	67.1
Size / Dimension	0.275" Dia x 1.288" L (6.99mm x 32.72mm)
DC Cold Resistance	0.0191 Ohms
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution for the 0325008.H is determined by strict equivalence across electrical and mechanical parameters:

Critical Substitution Parameters:

Current Rating: 8 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Response Time: Slow Blow (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
Breaking Capacity @ Rated Voltage: 400A (exact match required)
Melting I²t: 67.1 (exact match required)
Physical Dimensions: 0.275" Dia x 1.288" L (exact match required)

All substitute parts listed maintain identical electrical performance and mechanical compatibility with the original part. Substitutes differ only in product status (active vs. obsolete), packaging configuration, and regulatory compliance certifications.

Parameter Comparison

Parameter	0325008.H (Main)	0325008.HXP	0325008.MXP	0325008.VXP
Current Rating (Amps)	8 A	8 A	8 A	8 A
Voltage Rating - AC	250 V	250 V	250 V	250 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	400A	400A	400A	400A
Melting I²t	67.1	67.1	67.1	67.1
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	0.0191 Ohms	0.0193 Ohms	0.0193 Ohms	0.0193 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

Primary Recommendation: 0325008.HXP

The 0325008.HXP is the direct active-status equivalent to the obsolete 0325008.H. This part maintains identical electrical and mechanical specifications while offering ROHS3 compliance and expanded regulatory certifications (CE, CSA, K-MARK, PSE, UL). Current inventory is 1244 units.

Secondary Recommendations: 0325008.MXP and 0325008.VXP

Both 0325008.MXP and 0325008.VXP are parametric equivalents with identical electrical performance and mechanical compatibility. These parts are active-status alternatives with ROHS3 compliance. The 0325008.VXP includes KC certification in addition to CE, CSA, PSE, and UL approvals. Inventory levels are 1123 units (0325008.MXP) and 940 units (0325008.VXP).

All three substitute parts are suitable for direct replacement in applications currently using the 0325008.H. Selection among substitutes may be based on regional regulatory requirements, packaging preferences (all listed as Bulk), or inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 0325008.HXP, 0325008.MXP, and 0325008.VXP be used interchangeably with the 0325008.H?

A: Yes. All three substitute parts maintain identical current rating (8A), voltage rating (250VAC), response time (Slow Blow), package configuration (3AB/3AG, 1/4" x 1-1/4" axial), breaking capacity (400A), and melting I²t (67.1). Physical dimensions and mounting type are identical, ensuring direct mechanical and electrical compatibility.

Q: What is the difference between the three substitute parts?

A: The 0325008.HXP, 0325008.MXP, and 0325008.VXP are electrically and mechanically identical. Differences exist only in regulatory certifications and product status. The 0325008.HXP includes K-MARK certification. The 0325008.VXP includes KC certification. All three are active-status parts with ROHS3 compliance, whereas the original 0325008.H is obsolete and RoHS non-compliant.

Q: Why is the DC Cold Resistance slightly different (0.0191 Ohms vs. 0.0193 Ohms)?

A: The DC Cold Resistance values fall within normal manufacturing tolerance ranges for ceramic cartridge fuses. Both values are functionally equivalent for circuit protection applications and do not affect substitution suitability.

Q: Are there any temperature rating differences?

A: The original 0325008.H does not specify an operating temperature range. All three substitute parts are rated for -55°C to 125°C operation, providing defined thermal performance specifications for the active-status alternatives.

Q: Which substitute should be selected for international applications?

A: Selection depends on target markets. The 0325008.HXP includes K-MARK (South Korea) certification. The 0325008.VXP includes KC (South Korea) certification. All three include CE (European Union) and PSE (Japan) certifications. Verify specific regional requirements for your application.

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