Littelfuse 0315015.H Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0315015.H is a 15 A, 32 V AC/DC glass cartridge fuse with slow-blow response characteristics, designed for through-hole mounting in 3AB and 3AG package formats. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design and procurement requirements. Substitute parts maintain identical electrical and mechanical specifications while offering improved product status and compliance certifications.

Key Parameters

Parameter	Value
Current Rating	15 A
Voltage Rating (AC)	32 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4" (Axial)
Mounting Type	Through Hole
Breaking Capacity @ Rated Voltage	300 A
Melting I²t	1870
Operating Temperature Range	-55°C ~ 125°C
DC Cold Resistance	0.005 Ohms
Size / Dimension	0.275" Dia x 1.275" L (6.99mm x 32.39mm)
Approval Agency	UL

Substitute Part Grouping Explanation

Substitute parts for the 0315015.H are determined by strict equivalence across all electrical and mechanical parameters. The following criteria establish substitutability:

Current Rating: 15 A (exact match required)
Voltage Rating (AC): 32 V (exact match required)
Fuse Type: Cartridge, Glass (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: 300 A (exact match required)
Melting I²t: 1870 (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)
DC Cold Resistance: 0.005 Ohms (exact match required)

All three substitute parts—0315015.HXP, 0315015.MXP, and 0315015.VXP—meet these criteria and are classified as parametric equivalents.

Parameter Comparison

Parameter	0315015.H	0315015.HXP	0315015.MXP	0315015.VXP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	15 A	15 A	15 A	15 A
Voltage Rating - AC	32 V	32 V	32 V	32 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
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	300 A	300 A	300 A	300 A
Melting I²t	1870	1870	1870	1870
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
DC Cold Resistance	0.005 Ohms	0.005 Ohms	0.005 Ohms	0.005 Ohms
Size / Dimension	0.275" Dia x 1.275" L (6.99mm x 32.39mm)	0.275" Dia x 1.275" L (6.99mm x 32.39mm)	0.275" Dia x 1.275" L (6.99mm x 32.39mm)	0.275" Dia x 1.275" L (6.99mm x 32.39mm)
Approval Agency	UL	UL	UL	UL
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	Not specified	REACH Unaffected	REACH Unaffected	REACH Unaffected
Packaging	-	Bulk	Bulk	Bulk
Inventory Status	1050 Pcs New Original In Stock	1023 Pcs New Original In Stock	2300 Pcs New Original In Stock	1124 Pcs New Original In Stock

Engineering Selection Recommendations

All three substitute parts—0315015.HXP, 0315015.MXP, and 0315015.VXP—are direct parametric equivalents to the 0315015.H and are suitable for replacement in applications requiring a 15 A, 32 V AC/DC slow-blow glass cartridge fuse in 3AB/3AG package format.

The primary distinction between the main part and substitutes is product status and regulatory compliance. The 0315015.H is classified as obsolete, while all substitute parts maintain active product status. Additionally, the substitute parts are ROHS3 compliant and REACH unaffected, whereas the main part is RoHS non-compliant.

Selection among the three active equivalents may be based on inventory availability and packaging requirements. All three parts are supplied in bulk packaging and maintain identical electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can 0315015.HXP, 0315015.MXP, and 0315015.VXP be used interchangeably with 0315015.H?

A: Yes. All three parts are parametric equivalents with identical current rating (15 A), voltage rating (32 V AC), fuse type (cartridge, glass), response time (slow blow), package format (3AB, 3AG), breaking capacity (300 A), melting I²t (1870), operating temperature range (-55°C ~ 125°C), and DC cold resistance (0.005 Ohms). Physical dimensions and mounting type are identical.

Q: What is the primary reason to transition from 0315015.H to one of the substitute parts?

A: The 0315015.H is classified as obsolete. The substitute parts—0315015.HXP, 0315015.MXP, and 0315015.VXP—are active products with improved regulatory compliance (ROHS3 compliant and REACH unaffected), ensuring long-term availability and compliance with current environmental standards.

Q: Are there differences in electrical performance between the main part and substitute parts?

A: No. All electrical parameters are identical: current rating, voltage rating, response time, breaking capacity, melting I²t, operating temperature range, and DC cold resistance are equivalent across all four parts.

Q: Do the substitute parts fit the same footprint and mounting configuration?

A: Yes. All parts use the 3AB, 3AG package format with identical physical dimensions of 0.275" diameter by 1.275" length (6.99mm x 32.39mm). Through-hole mounting configuration is identical.

Q: Which substitute part should be selected if multiple options are available?

A: Selection may be based on inventory availability and procurement lead time. 0315015.MXP currently has the highest inventory level (2300 Pcs), followed by 0315015.VXP (1124 Pcs) and 0315015.HXP (1023 Pcs). All three parts are functionally equivalent.

Q: Are all substitute parts UL approved?

A: Yes. All three substitute parts carry UL approval, maintaining the same certification standard as the main part.

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