Littelfuse 0362004.M Equivalent & Substitute Parts

Part Overview

The Littelfuse 0362004.M is a 4 A, 32 V AC/DC fast-blow glass cartridge fuse in 8AG form factor (1/4" x 1"). This component is classified as obsolete, making identification of compatible substitutes essential for system maintenance and repair applications. The part requires a dedicated fuse holder for installation and is commonly used in low-voltage DC and AC circuits where fast-response overcurrent protection is required.

Substiute Parts

0362004.M

Littelfuse Inc.In Stock: 11810362004.M Datasheet

Current PartRFQ

BK/AGX-4

Eaton - Electronics DivisionIn Stock: 1215BK/AGX-4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 0362004.M is based on the following critical parameters:

• Current Rating: 4 A (must match exactly)
• Package / Case: 8AG, 1/4" x 1" (physical and electrical compatibility)
• Fuse Type: Cartridge, Glass (form factor requirement)
• Response Time: Fast Blow (functional characteristic)
• Mounting Type: Requires Holder (installation requirement)

The substitute part BK/AGX-4 (Eaton - Electronics Division) meets these core criteria. While the substitute has a higher voltage rating (250 V AC/DC versus 32 V AC/DC), this represents an upgrade in capability and does not compromise compatibility in 32 V circuits. The physical dimensions remain within acceptable tolerance (0.250" Dia x 1.042" L versus 0.250" Dia x 1.000" L), and both parts maintain the same 8AG form factor and fast-blow response characteristic.

Parameter Comparison

Engineering Selection Recommendations

The Eaton BK/AGX-4 is the direct substitute for the obsolete Littelfuse 0362004.M. Selection is based on the following factors:

• Product Status: The Littelfuse part is obsolete; the Eaton substitute is active and currently manufactured, ensuring long-term availability.
• Electrical Compatibility: Both parts carry identical 4 A current ratings and fast-blow response characteristics. The Eaton part's higher voltage rating (250 V) is compatible with 32 V circuits and provides enhanced margin.
• Physical Compatibility: Both parts conform to the 8AG form factor and fit standard 8AG fuse holders. The minor dimensional difference (0.042" length increase) does not affect holder compatibility.
• Certification: The Eaton BK/AGX-4 carries cULus approval, providing recognized safety certification for industrial and commercial applications.
• Compliance: Both parts are RoHS non-compliant and carry identical ECCN and HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Can the Eaton BK/AGX-4 be used as a direct replacement in equipment designed for the Littelfuse 0362004.M?

A: Yes. Both parts share identical current ratings (4 A), response time (fast blow), and 8AG form factor. The substitute's higher voltage rating does not create compatibility issues in 32 V circuits.

Q: What is the significance of the voltage rating difference between the two parts?

A: The Littelfuse part is rated 32 V AC/DC, while the Eaton substitute is rated 250 V AC/DC. In a 32 V circuit, the higher-rated substitute operates safely with additional voltage margin. Voltage rating indicates the maximum voltage at which the fuse can safely interrupt a circuit; exceeding this rating is not permitted, but operating below it is acceptable.

Q: Are the physical dimensions compatible with existing 8AG fuse holders?

A: Yes. Both parts are 0.250" in diameter and fit standard 8AG holders. The length difference (1.000" versus 1.042") is within normal manufacturing tolerance and does not affect holder compatibility.

Q: Why is the Littelfuse 0362004.M classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The Eaton BK/AGX-4 provides equivalent functionality and is actively manufactured, making it the appropriate choice for new installations and replacements.

Q: What certifications does the substitute part carry?

A: The Eaton BK/AGX-4 carries cULus approval, indicating compliance with UL and CSA safety standards. The original Littelfuse part does not list approval agency certification in the provided data.