Littelfuse 46379-8 Equivalent & Substitute Parts

Part Overview

The Littelfuse 46379-8 is an 8-circuit blade fuse block rated for 150 A at 32V, designed for panel mount applications. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations. The fuse block accommodates ATC and ATO blade fuses with quick connect 0.250" (6.3mm) termination, serving as a central distribution point in automotive and industrial electrical systems.

Substiute Parts

46379-8

Littelfuse Inc.In Stock: 107446379-8 Datasheet

Current PartRFQ

880028

Littelfuse Inc.In Stock: 726880028 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 46379-8 is constrained by the following critical parameters:

• Voltage Rating: Must be 32V or higher to maintain system safety margins
• Fuse Type & Series Compatibility: Must accommodate ATO blade fuses to ensure mechanical and electrical fit
• Current Handling Capacity: The substitute must support the system's maximum current requirements
• Termination Interface: Quick connect 0.250" (6.3mm) terminals define the electrical connection method
• Mounting Configuration: Panel mount orientation is required for the specified installation envelope
• Regulatory Compliance: RoHS3 and REACH compliance status must be maintained

The Littelfuse 880028 is identified as a manufacturer-recommended substitute. While it differs in mounting type (chassis mount vs. panel mount), circuit count (12 vs. 8), and termination style (screw terminal vs. quick connect), it shares the core electrical parameters: 32V voltage rating, ATO blade fuse compatibility, and blade fuseholder type. Selection of this substitute requires verification that the installation environment can accommodate the alternative mounting and termination configuration.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 880028 is an active product from the same manufacturer, providing continuity of supply for obsolete 46379-8 applications. The substitute maintains electrical compatibility at 32V with ATO blade fuse support. However, the following differences require engineering evaluation:

• Current Rating Reduction: The 880028 is rated for 100 A versus the 46379-8's 150 A. System current requirements must not exceed 100 A for this substitute to be viable.
• Mounting Configuration Change: Transition from panel mount to chassis mount requires mechanical redesign of the installation interface.
• Termination Modification: Screw terminal connection replaces quick connect, necessitating harness reconfiguration.
• Circuit Count Increase: The 12-circuit configuration provides additional capacity beyond the original 8-circuit design.
• Product Status: Active status of the 880028 ensures ongoing availability and support.

Selection of the 880028 substitute is appropriate only when system current requirements do not exceed 100 A and when the mechanical and electrical installation can be modified to accommodate chassis mount and screw terminal termination.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 880028 directly replace the 46379-8 without modification?

A: No. While both are ATO blade fuse blocks at 32V, they differ in mounting type (panel vs. chassis), termination style (quick connect vs. screw), and current rating (150 A vs. 100 A). Installation modifications are required.

Q: What is the primary limitation when using the 880028 as a substitute?

A: The 880028 has a maximum current rating of 100 A, compared to the 46379-8's 150 A rating. If the system requires current handling above 100 A, this substitute is not suitable.

Q: Are both parts compatible with the same fuse types?

A: Yes. Both the 46379-8 and 880028 are designed for ATO blade fuses and maintain the same blade fuseholder type, ensuring fuse interchangeability.

Q: Why does the 880028 have 12 circuits instead of 8?

A: The 880028 is a different product line (ST ATO® series) designed for expanded circuit distribution. The additional circuits do not affect substitution viability if only 8 circuits are utilized.

Q: What compliance certifications apply to the 880028?

A: The provided data specifies RoHS3 compliance for the 46379-8. Compliance status for the 880028 should be verified with the manufacturer before final selection.

Q: Is the 880028 currently available?

A: Yes. The 880028 is classified as an active product with documented inventory, ensuring supply continuity for the obsolete 46379-8.