Littelfuse 0313005.VXP Glass Cartridge Fuse 5A 250VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0313005.VXP is a 5 A, 250 V AC/DC slow-blow glass cartridge fuse in the 3AB/3AG package format (1/4" x 1-1/4"). This component is classified as Active product status and is designed for applications requiring overcurrent protection in AC and DC circuits. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling direct replacement in holder-based fuse applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	0313005.VXP
Manufacturer	Littelfuse Inc.
Current Rating	5 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	200 A
Melting I²t	140
Operating Temperature Range	-55°C to 125°C
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
DC Cold Resistance	0.0214 Ohms
RoHS Status	ROHS3 Compliant
Approval Agencies	CE, CSA, KC, PSE, UL

Substitute Part Grouping Explanation

Substitute parts for the 0313005.VXP are classified into two categories based on electrical and mechanical parameter alignment:

Parametric Equivalents (Littelfuse Series 313): Parts 0313005.HXIDP, 0313005.HXP, 0313005.VXIDP, and 0313005.MXP share identical current rating (5 A), AC voltage rating (250 V), package format (3AB, 3AG, 1/4" x 1-1/4"), response time (Slow Blow), breaking capacity (200 A), operating temperature range (-55°C to 125°C), and physical dimensions. These parts differ only in packaging variant designations (VXP, HXP, HXIDP, VXIDP, MXP) and minor variations in melting I²t values (140 or 276) and approval agency certifications. All maintain ROHS3 compliance and identical DC cold resistance (0.0214 Ohms).

Manufacturer-Recommended Alternatives: Part 0001.2531 (SCHURTER Inc.) and BK/MDQ-5 (Eaton - Electronics Division) are cross-manufacturer substitutes meeting the same 5 A current rating, 250 V AC voltage rating, 3AB/3AG package format, and slow-blow response time. These alternatives differ in breaking capacity specifications, melting I²t values, approval agency certifications, and operating temperature ranges.

Parameter Comparison

Parameter	0313005.VXP	0313005.HXIDP	0313005.HXP	0313005.VXIDP	0313005.MXP	0001.2531	BK/MDQ-5
Manufacturer	Littelfuse	Littelfuse	Littelfuse	Littelfuse	Littelfuse	SCHURTER	Eaton
Current Rating (A)	5	5	5	5	5	5	5
Voltage Rating AC (V)	250	250	250	250	250	250	250
Voltage Rating DC (V)	—	—	—	—	—	63	—
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"	3AB, 3AG, 1/4" x 1-1/4"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)	0.250" Dia x 1.252" L (6.35mm x 31.80mm)	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Breaking Capacity @ Rated Voltage	200 A	200 A	200 A	200 A	200 A	1.5 kA AC, 20 kA DC	200 A
Melting I²t	140	140	140	140	276	127	—
DC Cold Resistance (Ohms)	0.0214	0.0214	0.0214	0.0214	0.0214	—	0.0265
Operating Temperature Range	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-40°C to 85°C	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant
Approval Agencies	CE, CSA, KC, PSE, UL	CE, CSA, KC, PSE, UL	CE, CSA, K-MARK, PSE, UL	CE, CSA, KC, PSE, UL	CE, CSA, K-MARK, PSE, UL	cURus	CSA, UL

Engineering Selection Recommendations

Littelfuse Series 313 Variants (0313005.HXIDP, 0313005.HXP, 0313005.VXIDP, 0313005.MXP): These parts are direct parametric equivalents to the 0313005.VXP. All maintain Active product status, ROHS3 compliance, and identical electrical and mechanical specifications. Selection among these variants depends on packaging designation requirements and approval agency certifications specific to the application region. The 0313005.HXP variant offers the highest inventory availability (5083 pcs).

SCHURTER 0001.2531: This part meets the core 5 A, 250 V AC, 3AB/3AG package requirements and maintains ROHS3 compliance. However, it includes a 63 V DC voltage rating specification and operates within a narrower temperature range (-40°C to 85°C) compared to the original part (-55°C to 125°C). The breaking capacity is significantly higher (1.5 kA AC, 20 kA DC). Approval is limited to cURus certification. This part is suitable for applications where the extended DC voltage rating and higher breaking capacity are beneficial and the narrower operating temperature range is acceptable.

Eaton BK/MDQ-5: This part matches the 5 A, 250 V AC, 3AB/3AG package and slow-blow response time. It is not ROHS3 compliant and carries only CSA and UL approvals. The DC cold resistance is slightly higher (0.0265 Ohms versus 0.0214 Ohms). This part is suitable only for applications where RoHS compliance is not required and CSA/UL certification is sufficient.

Frequently Asked Questions (FAQ)

Q: Can 0313005.HXIDP, 0313005.HXP, 0313005.VXIDP, and 0313005.MXP be used interchangeably with 0313005.VXP?

A: Yes. These Littelfuse Series 313 variants are parametric equivalents sharing identical current rating (5 A), AC voltage rating (250 V), package format (3AB, 3AG, 1/4" x 1-1/4"), response time (Slow Blow), breaking capacity (200 A), operating temperature range (-55°C to 125°C), and physical dimensions. Differences in part number suffixes (VXP, HXP, HXIDP, VXIDP, MXP) reflect packaging variants and regional certification designations. All maintain ROHS3 compliance and identical DC cold resistance (0.0214 Ohms).

Q: What is the difference between the 0313005.MXP and other Littelfuse variants?

A: The 0313005.MXP differs in melting I²t value (276 versus 140 for other variants). This indicates a longer time-to-melt characteristic, affecting the fuse's response to sustained overcurrent conditions. Selection depends on application-specific thermal time-constant requirements.

Q: Is the SCHURTER 0001.2531 a suitable replacement?

A: The SCHURTER 0001.2531 meets the primary electrical parameters (5 A, 250 V AC, 3AB/3AG package, Slow Blow). However, it operates within a narrower temperature range (-40°C to 85°C versus -55°C to 125°C) and includes a 63 V DC voltage rating. Use this part only if the application environment falls within the specified temperature range and the DC voltage rating is compatible with circuit requirements.

Q: Why is the Eaton BK/MDQ-5 listed as a substitute if it is not RoHS compliant?

A: The Eaton BK/MDQ-5 is included as a manufacturer-recommended alternative meeting the core electrical and mechanical parameters (5 A, 250 V AC, 3AB/3AG package, Slow Blow, 200 A breaking capacity). However, it is not ROHS3 compliant and carries only CSA and UL approvals. This part is suitable only for applications where RoHS compliance is not a regulatory requirement.

Q: Are all substitute parts compatible with existing 3AB/3AG fuse holders?

A: Yes. All listed substitute parts conform to the 3AB/3AG package format with dimensions of 0.250" diameter x 1.250" length (6.35mm x 31.75mm), with the exception of the SCHURTER 0001.2531, which measures 0.250" diameter x 1.252" length (6.35mm x 31.80mm). This 0.002" length difference is within typical holder tolerance and does not prevent mechanical compatibility.

Q: What approval agencies are relevant for my application?

A: The original 0313005.VXP carries CE, CSA, KC, PSE, and UL approvals. Littelfuse variants maintain these certifications with minor regional variations (K-MARK versus KC designation). The SCHURTER 0001.2531 carries cURus certification. The Eaton BK/MDQ-5 carries CSA and UL approvals only. Select a substitute part based on the approval agencies required by your application's regulatory jurisdiction.

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