3ABP 375-R Ceramic Cartridge Fuse: Equivalent & Substitute Parts

Part Overview

The 3ABP 375-R is a 375 mA ceramic cartridge fuse rated for 250 V AC operation, manufactured by Bel Fuse Inc. in the 3AB/3AG form factor with fast-blow response characteristics. This part is classified as obsolete, making identification of active equivalent components necessary for ongoing system support and procurement.

Substitute parts must maintain electrical compatibility across current rating, voltage rating, response time, and mechanical form factor to ensure direct interchangeability in circuit protection applications.

Substiute Parts

3ABP 375-R

Bel Fuse Inc.In Stock: 10573ABP 375-R Datasheet

Current PartRFQ

0324.375HXP

Littelfuse Inc.In Stock: 7560324.375HXP Datasheet

DirectRFQ

0324.375MXP

Littelfuse Inc.In Stock: 12130324.375MXP Datasheet

DirectRFQ

0324.375VXP

Littelfuse Inc.In Stock: 7400324.375VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The three substitute parts—0324.375VXP, 0324.375HXP, and 0324.375MXP—are direct equivalents based on the following substitution criteria:

Electrical Parameters (Mandatory Match):

• Current Rating: 375 mA (identical)
• Voltage Rating - AC: 250 V (identical)
• Response Time: Fast Blow (identical)
• Breaking Capacity @ Rated Voltage: 35A AC (identical)

Mechanical Parameters (Mandatory Match):

• Fuse Type: Cartridge, Ceramic (identical)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (identical)
• Mounting Type: Through Hole (identical)
• Operating Temperature Range: -55°C ~ 125°C (identical)

Compliance & Status:

• All substitute parts are manufactured by Littelfuse Inc. with Active product status
• All parts maintain ROHS3 compliance and REACH Unaffected status
• All parts carry CE, CSA, and UL approvals

The substitute parts provide enhanced DC voltage rating (125 V DC) and improved DC breaking capacity (10kA DC) compared to the main part, while maintaining full AC compatibility.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse substitute parts (0324.375VXP, 0324.375HXP, 0324.375MXP) are qualified replacements for the obsolete 3ABP 375-R in AC 250 V applications. Selection among the three substitutes may be based on packaging availability and inventory status:

• 0324.375VXP: 647 units in stock
• 0324.375HXP: 707 units in stock
• 0324.375MXP: 1170 units in stock

All substitute parts carry active product status with CE, CSA, and UL certifications, ensuring long-term availability and regulatory compliance. The Littelfuse parts provide enhanced DC voltage rating and breaking capacity specifications, which do not compromise AC circuit protection performance and may provide additional design margin in mixed-voltage applications.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0324.375VXP, 0324.375HXP, or 0324.375MXP be used as direct replacements for the 3ABP 375-R?

A: Yes. All three Littelfuse parts maintain identical electrical ratings (375 mA, 250 V AC, fast-blow response) and mechanical form factor (3AB/3AG, 1/4" x 1-1/4" axial). They are direct substitutes for AC 250 V applications.

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

A: The 0324.375VXP, 0324.375HXP, and 0324.375MXP are electrically and mechanically identical. Differences are limited to packaging configuration and inventory availability. Selection should be based on procurement requirements and stock levels.

Q: Does the lower melting I²t value (0.05 vs. 0.07) of the substitute parts affect compatibility?

A: No. The melting I²t parameter defines the thermal energy required to melt the fuse element. A lower value indicates faster response at equivalent current levels, which is consistent with fast-blow fuse characteristics and does not compromise circuit protection performance.

Q: Are the substitute parts suitable for DC applications?

A: The substitute parts carry a 125 V DC rating with 10kA DC breaking capacity. The original 3ABP 375-R does not specify DC ratings. For DC applications, the Littelfuse substitutes provide defined DC performance; however, circuit design must verify that 125 V DC rating is appropriate for the application.

Q: What certifications do the substitute parts carry?

A: All substitute parts carry CE, CSA, and UL approvals. The original part carried CE, CSA, and cURus approvals. The UL certification on substitute parts provides equivalent regulatory coverage for North American applications.