Littelfuse 0324005.H Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0324005.H is a 5 A ceramic cartridge fuse rated for 250 V AC and 125 V DC operation. Designed for through-hole mounting in the 3AB/3AG form factor (1/4" x 1-1/4"), this fast-blow fuse provides circuit protection with a breaking capacity of 750 A AC and 10 kA DC. The 0324005.H is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and component sourcing.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating - AC	250 V
Voltage Rating - DC	125 V
Fuse Type	Cartridge, Ceramic
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Breaking Capacity @ Rated Voltage	750 A AC, 10 kA DC
Melting I²t	26
Operating Temperature Range	-55°C ~ 125°C
DC Cold Resistance	0.03 Ohms
Size / Dimension	0.275" Dia x 1.288" L (6.99 mm x 32.72 mm)

Substitute Part Grouping Explanation

Substitute parts for the 0324005.H are qualified based on electrical and mechanical parameter equivalence within the ceramic cartridge fuse category. All substitute parts maintain identical specifications across the following critical parameters:

Current Rating: 5 A
Voltage Rating: 250 V AC / 125 V DC
Response Time: Fast Blow
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial)
Breaking Capacity: 750 A AC, 10 kA DC
Melting I²t: 26
Operating Temperature: -55°C ~ 125°C
DC Cold Resistance: 0.03 Ohms
Physical Dimensions: 0.275" Dia x 1.288" L (6.99 mm x 32.72 mm)
Mounting Type: Through Hole
Series: 324

The substitute parts differ in product status (active vs. obsolete), packaging configuration, compliance certifications, and RoHS status. These differences do not affect electrical or mechanical compatibility in circuit applications.

Parameter Comparison

Parameter	0324005.H (Main)	0324005.HXP	0324005.MXP	0324005.VXP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	5 A	5 A	5 A	5 A
Voltage Rating - AC	250 V	250 V	250 V	250 V
Voltage Rating - DC	125 V	125 V	125 V	125 V
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast 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	750 A AC, 10 kA DC	750 A AC, 10 kA DC	750 A AC, 10 kA DC	750 A AC, 10 kA DC
Melting I²t	26	26	26	26
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
DC Cold Resistance	0.03 Ohms	0.03 Ohms	0.03 Ohms	0.03 Ohms
Size / Dimension	0.275" Dia x 1.288" L (6.99 mm x 32.72 mm)	0.275" Dia x 1.288" L (6.99 mm x 32.72 mm)	0.275" Dia x 1.288" L (6.99 mm x 32.72 mm)	0.275" Dia x 1.288" L (6.99 mm x 32.72 mm)
Product Status	Obsolete	Active	Active	Active
Packaging	-	Bulk	Bulk	Bulk
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
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 (0324005.HXP, 0324005.MXP, 0324005.VXP) are electrically and mechanically equivalent to the obsolete 0324005.H. Selection among these active alternatives should be based on the following criteria:

Compliance Requirements: The 0324005.HXP, 0324005.MXP, and 0324005.VXP all carry ROHS3 compliance, whereas the original 0324005.H is RoHS non-compliant. For applications requiring RoHS compliance, any of the three substitutes are suitable.

Certification Coverage: The 0324005.HXP and 0324005.MXP carry identical approval agencies (CE, CSA, K-MARK, PSE, UL). The 0324005.VXP carries CE, CSA, KC, and PSE certifications with UL approval. Selection depends on regional regulatory requirements for the end application.

Inventory Availability: The 0324005.MXP offers the highest inventory level (5038 pcs), followed by 0324005.HXP (1010 pcs) and 0324005.VXP (827 pcs). For high-volume production, the 0324005.MXP provides supply assurance.

Packaging: All substitute parts are supplied in bulk packaging, suitable for manufacturing and assembly operations.

Frequently Asked Questions (FAQ)

Q: Can the 0324005.HXP, 0324005.MXP, or 0324005.VXP be used as direct replacements for the 0324005.H?

A: Yes. All three substitute parts maintain identical electrical ratings (5 A, 250 V AC, 125 V DC), response characteristics (fast blow), breaking capacity (750 A AC, 10 kA DC), and physical dimensions (0.275" Dia x 1.288" L). They are mechanically and electrically interchangeable in through-hole applications.

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

A: The substitute parts are identical in electrical and mechanical specifications. Differences exist in product status (all active), compliance certifications, and RoHS status. The 0324005.HXP and 0324005.MXP carry identical certifications (CE, CSA, K-MARK, PSE, UL), while the 0324005.VXP carries CE, CSA, KC, PSE, and UL certifications. All three are ROHS3 compliant.

Q: Does the packaging difference affect compatibility?

A: No. All substitute parts are supplied in bulk packaging suitable for manufacturing environments. Packaging does not affect electrical or mechanical performance in circuit applications.

Q: Are there any temperature or resistance differences between the main part and substitutes?

A: No. All parts maintain identical operating temperature range (-55°C ~ 125°C) and DC cold resistance (0.03 Ohms).

Q: Which substitute should be selected for new designs?

A: For new designs, any of the three active substitutes are suitable. Selection should be based on regional certification requirements, inventory availability, and supply chain considerations. The 0324005.MXP offers the highest inventory level for production volume assurance.

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