Littelfuse 0303005.M Glass Cartridge Fuse 5A 32VAC 7AG Equivalent & Substitute Parts

Part Overview

The Littelfuse 0303005.M is a 5 A, 32 V AC/DC glass cartridge fuse in 7AG package format (1/4" x 7/8"). This medium-blow fuse is designed for circuits requiring holder-mounted protection and is currently in active production status. Substitute parts may be required due to inventory availability, supply chain considerations, or specific application requirements where alternative response characteristics are acceptable within the electrical parameters.

Substiute Parts

0303005.M

Littelfuse Inc.In Stock: 10560303005.M Datasheet

Current PartRFQ

AGW-5

Eaton - Electronics DivisionIn Stock: 815AGW-5 Datasheet

MFR RecommendedRFQ

BK/AGW-5

Eaton - Electronics DivisionIn Stock: 886BK/AGW-5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Littelfuse 0303005.M are qualified based on the following electrical and mechanical parameters:

• Current Rating: 5 A (exact match required)
• Voltage Rating: 32 V AC (exact match required)
• Package / Case: 7AG, 1/4" x 7/8" (mechanical compatibility required)
• Fuse Type: Cartridge, Glass (functional equivalence required)
• Mounting Type: Requires Holder (installation compatibility required)

The Eaton AGW-5 and BK/AGW-5 fuses meet these core substitution criteria. Both are 5 A, 32 V AC/DC glass cartridge fuses in 7AG package format with holder-mounted installation. The primary difference is response time: the Littelfuse 0303005.M operates as medium-blow, while the Eaton substitutes operate as fast-blow. This distinction affects circuit protection characteristics and must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

All three fuses—Littelfuse 0303005.M, Eaton AGW-5, and Eaton BK/AGW-5—are active production components with equivalent electrical ratings (5 A, 32 V AC/DC) and identical package specifications (7AG, 1/4" x 7/8"). All maintain RoHS non-compliant status.

The Eaton AGW-5 and BK/AGW-5 are direct mechanical and electrical substitutes for the Littelfuse 0303005.M within the specified parameters. The response time difference (medium-blow versus fast-blow) is the only technical distinction and must be evaluated against circuit protection requirements. Both Eaton variants provide specified breaking capacity (1kA) and DC cold resistance (0.018 Ohms), whereas these parameters are not specified for the Littelfuse part.

Selection between AGW-5 and BK/AGW-5 depends on application-specific requirements, as both share identical electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can the Eaton AGW-5 or BK/AGW-5 be used as a direct replacement for the Littelfuse 0303005.M?

A: Yes, both Eaton fuses are mechanically and electrically compatible substitutes. They share the same current rating (5 A), voltage rating (32 V AC), fuse type (cartridge, glass), and package format (7AG, 1/4" x 7/8"). The response time difference (fast-blow versus medium-blow) must be evaluated for the specific circuit application.

Q: What is the difference between the Eaton AGW-5 and BK/AGW-5?

A: Both fuses have identical electrical and mechanical specifications. The designation difference reflects manufacturer part numbering conventions. Selection between them should be based on application requirements and availability.

Q: Are there dimensional compatibility concerns when substituting?

A: The Littelfuse 0303005.M measures 0.250" Dia x 0.812" L, while the Eaton substitutes measure 0.250" Dia x 0.875" L. Both fit the 7AG package specification and holder requirements. The slight length difference (0.063") is within standard 7AG tolerance and does not affect holder compatibility.

Q: What does response time (medium-blow versus fast-blow) mean for circuit protection?

A: Response time defines how quickly the fuse element melts under overcurrent conditions. Medium-blow fuses tolerate brief inrush currents before opening, while fast-blow fuses open more rapidly. Circuit design determines which response characteristic is appropriate.

Q: Are all three fuses RoHS compliant?

A: No. The Littelfuse 0303005.M, Eaton AGW-5, and Eaton BK/AGW-5 are all RoHS non-compliant. If RoHS compliance is required, alternative fuse solutions must be sourced.