Littelfuse 0318012.MXP Equivalent & Substitute Parts

Part Overview

The Littelfuse 0318012.MXP is a 12 A, 32 V AC/DC fast-blow glass cartridge fuse in 3AB/3AG package format (1/4" x 1-1/4" axial). This component is classified as Active product status and is designed for through-hole mounting applications requiring overcurrent protection in low-voltage circuits. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in circuit designs without functional compromise.

Substiute Parts

0318012.MXP

Littelfuse Inc.In Stock: 10540318012.MXP Datasheet

Current PartRFQ

BK/AGC-V-12-R

Eaton - Electronics DivisionIn Stock: 882BK/AGC-V-12-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 0318012.MXP is determined by the following critical parameters:

• Current Rating: 12 A (exact match required)
• Voltage Rating (AC): 32 V (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" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

The Eaton BK/AGC-V-12-R meets all substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse 0318012.MXP and Eaton BK/AGC-V-12-R are Active product status components with established regulatory approvals. The Littelfuse part carries cULus certification, while the Eaton substitute carries CSA and UL certifications. Both components meet RoHS compliance requirements and operate within the specified temperature range of -55°C to 125°C.

The Eaton BK/AGC-V-12-R provides a higher breaking capacity (1 kA versus 300 A) and lower DC cold resistance (0.006 Ohms versus 0.0072 Ohms), which may offer enhanced performance characteristics in applications where these parameters are relevant. Dimensional tolerances between the two parts are minimal and fall within standard mechanical compatibility for 3AB/3AG package specifications.

Frequently Asked Questions (FAQ)

Q: Can the Eaton BK/AGC-V-12-R be used as a direct replacement for the Littelfuse 0318012.MXP?

A: Yes. Both components share identical electrical ratings (12 A, 32 V AC), fuse type (cartridge, glass), response time (fast blow), and package format (3AB, 3AG, 1/4" x 1-1/4" axial). Dimensional differences are within acceptable mechanical tolerances for through-hole mounting applications.

Q: What are the key parameters that determine substitution eligibility?

A: Current rating, voltage rating, fuse type, response time, package format, and mounting type must match exactly. Operating temperature range must meet or exceed the original specification. Both parts satisfy these criteria.

Q: Are there any compliance or certification differences between these parts?

A: The Littelfuse part carries cULus certification, while the Eaton part carries CSA and UL certifications. Both meet RoHS compliance requirements. Selection may depend on specific regulatory requirements for your application.

Q: How do the breaking capacity and melting I²t values differ?

A: The Eaton BK/AGC-V-12-R has a higher breaking capacity (1 kA versus 300 A) and higher melting I²t (696.96 versus 234.6). These parameters indicate the Eaton part can handle higher fault currents and has a different thermal response profile. Verify compatibility with your circuit protection requirements.

Q: Are the physical dimensions identical?

A: Dimensions are similar but not identical. Littelfuse: 0.275" Dia x 1.288" L (6.99mm x 32.72mm); Eaton: 0.266" Dia x 1.292" L (6.76mm x 32.82mm). Both conform to 3AB/3AG standard specifications and are mechanically compatible with standard fuse holders.