Littelfuse 0325002.H Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0325002.H is a 2 A, 250 V AC ceramic cartridge fuse in the 3AB/3AG package format (1/4" x 1-1/4" axial). This component is classified as obsolete, making equivalent substitute parts necessary for ongoing circuit protection applications. The fuse provides slow-blow response characteristics with a 100 A breaking capacity at rated voltage and is approved by CSA and UL standards.

Key Parameters

Parameter	Value
Current Rating	2 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)
Mounting Type	Through Hole
Breaking Capacity @ Rated Voltage	100 A
Melting I²t	80
Size / Dimension	0.275" Dia x 1.288" L (6.99mm x 32.72mm)
DC Cold Resistance	0.12 Ohms

Substitute Part Grouping Explanation

Substitute parts for the 0325002.H are qualified based on the following critical parameters:

Current Rating: 2 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)
Melting I²t: 80 (exact match required)

The substitute parts listed below meet all these criteria. Additionally, the substitute parts provide enhanced DC voltage rating (125 V DC) and improved compliance status compared to the obsolete main part.

Parameter Comparison

Parameter	0325002.H (Main)	0325002.HXP	0325002.MXP	0325002.VXP
Current Rating (Amps)	2 A	2 A	2 A	2 A
Voltage Rating - AC	250 V	250 V	250 V	250 V
Voltage Rating - DC	Not specified	125 V	125 V	125 V
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic
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)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
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	80	80	80	80
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	0.12 Ohms	0.121 Ohms	0.121 Ohms	0.121 Ohms
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CSA, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL
Operating Temperature	Not specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C

Engineering Selection Recommendations

All three substitute parts (0325002.HXP, 0325002.MXP, 0325002.VXP) are direct functional equivalents to the 0325002.H for AC 250 V applications. The substitute parts offer the following advantages:

Active product status ensures long-term availability and supply chain continuity
ROHS3 compliance meets current environmental and regulatory requirements
Extended approval certifications (CE, CSA, PSE, UL) provide broader market acceptance
Specified DC voltage rating (125 V) and operating temperature range (-55°C ~ 125°C) enable broader application flexibility
Enhanced DC breaking capacity (10 kA) provides superior performance in mixed AC/DC circuits

Selection among the three substitute parts should be based on packaging requirements and inventory availability, as all three are electrically and mechanically identical.

Frequently Asked Questions (FAQ)

Q: Can 0325002.HXP, 0325002.MXP, or 0325002.VXP be used as direct replacements for 0325002.H?

A: Yes. All three substitute parts meet the critical electrical and mechanical parameters of the 0325002.H: 2 A current rating, 250 V AC voltage rating, slow-blow response, 3AB/3AG package format, and 80 melting I²t. The substitute parts are pin-compatible and functionally equivalent for AC 250 V circuit protection applications.

Q: What is the difference between 0325002.HXP, 0325002.MXP, and 0325002.VXP?

A: These three parts are parametrically identical. Differences exist only in packaging designation and inventory source. All three are active products with identical electrical specifications, certifications, and performance characteristics.

Q: Why do the substitute parts specify a 125 V DC rating when the original part does not?

A: The 0325002.H does not specify a DC voltage rating. The substitute parts provide explicit DC voltage rating (125 V) and enhanced DC breaking capacity (10 kA), enabling their use in mixed AC/DC applications. For AC-only applications, this additional specification does not affect compatibility.

Q: Are the substitute parts RoHS compliant?

A: Yes. All three substitute parts (0325002.HXP, 0325002.MXP, 0325002.VXP) are ROHS3 compliant, whereas the original 0325002.H is RoHS non-compliant. This compliance improvement is beneficial for applications subject to environmental regulations.

Q: What certifications do the substitute parts carry?

A: The substitute parts carry CE, CSA, PSE, and UL approvals, compared to CSA and UL for the original part. This expanded certification portfolio supports broader geographic and market applications.

Q: Are there any mechanical differences between the main part and substitute parts?

A: No. All parts share identical dimensions (0.275" Dia x 1.288" L / 6.99mm x 32.72mm), package format (3AB, 3AG, 1/4" x 1-1/4" axial), and mounting type (through hole). Physical interchangeability is complete.

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