Littelfuse 0312005.TXP Glass Cartridge Fuse 5A 250VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0312005.TXP is a 5 A, 250 V AC/DC glass cartridge fuse with fast-blow response characteristics. This component is classified as Active product status and is designed for applications requiring reliable overcurrent protection in 3AB and 3AG holder configurations. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and approval certifications to ensure direct interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Breaking Capacity @ Rated Voltage	200 A
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Approval Agencies	CE, CSA, KC, PSE, UL

Substitute Part Grouping Explanation

Substitute parts for the 0312005.TXP are qualified based on the following critical parameters that determine functional interchangeability:

Current Rating: 5 A (exact match required)
Voltage Rating: 250 V AC (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Fast Blow (exact match required)
Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
Physical Dimensions: 0.250" Dia x 1.250" L (exact match required)
Operating Temperature Range: -55°C ~ 125°C (minimum requirement)
Breaking Capacity: 200 A (minimum requirement)
Approval Certifications: CE, CSA, KC, PSE, UL (minimum requirement)

All substitute parts listed meet these criteria and are therefore electrically and mechanically equivalent for direct replacement applications.

Parameter Comparison

Parameter	0312005.TXP (Littelfuse)	0312005.HXP (Littelfuse)	0312005.MXP (Littelfuse)	BK/AGC-5-R (Eaton)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Eaton - Electronics Division
Current Rating (Amps)	5 A	5 A	5 A	5 A
Voltage Rating - AC	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast 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"
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)
Breaking Capacity @ Rated Voltage	200 A	200 A	200 A	200 A
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
DC Cold Resistance	0.0224 Ohms	0.0224 Ohms	0.0224 Ohms	0.019 Ohms
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agencies	CE, CSA, KC, PSE, UL	CE, CSA, KC, PSE, UL	CE, CSA, KC, PSE, UL	CSA, UL
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and meet the core electrical and mechanical specifications required for direct replacement in 3AB and 3AG holder applications. The Littelfuse variants (0312005.HXP and 0312005.MXP) carry identical approval certifications (CE, CSA, KC, PSE, UL) and DC cold resistance values as the primary part number 0312005.TXP, ensuring seamless interchangeability.

The Eaton BK/AGC-5-R substitute carries CSA and UL certifications. While this part does not include KC and PSE approvals, it maintains the same electrical ratings, physical dimensions, and breaking capacity. The DC cold resistance of 0.019 Ohms is lower than the Littelfuse variants, which may be relevant in applications with strict resistance specifications.

Selection among these equivalents should be based on certification requirements for the target application, availability, and any specific resistance or thermal performance criteria.

Frequently Asked Questions (FAQ)

Q: Can the 0312005.HXP and 0312005.MXP be used interchangeably with the 0312005.TXP?

A: Yes. All three Littelfuse part numbers share identical electrical ratings (5 A, 250 V AC), fuse type (cartridge, glass), response time (fast blow), physical dimensions (0.250" Dia x 1.250" L), and approval certifications (CE, CSA, KC, PSE, UL). They are parametric equivalents suitable for direct substitution.

Q: Is the Eaton BK/AGC-5-R a direct replacement for the Littelfuse 0312005.TXP?

A: The Eaton BK/AGC-5-R matches all critical electrical and mechanical parameters: 5 A current rating, 250 V AC voltage rating, fast-blow response, cartridge glass type, and 3AB/3AG package compatibility. However, it carries only CSA and UL certifications, not KC and PSE. Verify certification requirements for your application before substitution.

Q: What is the significance of the DC cold resistance difference between Littelfuse and Eaton parts?

A: The Littelfuse variants (0312005.TXP, 0312005.HXP, 0312005.MXP) have a DC cold resistance of 0.0224 Ohms, while the Eaton BK/AGC-5-R has 0.019 Ohms. This difference is within normal manufacturing tolerances for this component class. Applications with strict resistance specifications should confirm compatibility with the specific part selected.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts, including the Littelfuse and Eaton variants, are ROHS3 compliant.

Q: What holder types are compatible with these fuses?

A: All listed parts are designed for 3AB and 3AG holder configurations with 1/4" x 1-1/4" dimensions. Ensure your circuit protection assembly uses compatible holders before installation.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message