Littelfuse 0303015.M Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0303015.M is a 15 A, 32 V AC/DC glass cartridge fuse in the 7AG form factor (1/4" x 7/8"). This medium-blow fuse is designed for applications requiring holder-based installation and is currently in active production status. Equivalent parts may be required due to supply chain considerations, inventory availability, or specific application requirements where alternative response characteristics are acceptable.

Substiute Parts

0303015.M

Littelfuse Inc.In Stock: 9910303015.M Datasheet

Current PartRFQ

AGW-15

Eaton - Electronics DivisionIn Stock: 698AGW-15 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the Littelfuse 0303015.M is based on the following critical parameters:

• Current Rating: 15 A (exact match required)
• Voltage Rating: 32 V AC (exact match required)
• Package / Case: 7AG, 1/4" x 7/8" (exact match required for holder compatibility)
• Fuse Type: Cartridge, Glass (exact match required)
• Mounting Type: Requires Holder (exact match required)

The Eaton AGW-15 meets all mandatory substitution criteria. A secondary substitute, Eaton BK/AGW-15, is also listed as an equivalent option. The primary difference between the main part and its substitute is the response time characteristic (medium blow vs. fast blow), which represents a functional variation acceptable in applications where faster fault detection is beneficial or neutral.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse 0303015.M and Eaton AGW-15 are active production components with identical current and voltage ratings, fuse type, and package specifications. Selection between these parts should be based on application-specific requirements:

The Littelfuse 0303015.M provides medium-blow response characteristics suitable for applications with moderate inrush currents or where delayed fault detection is acceptable. The Eaton AGW-15 offers fast-blow response, providing faster fault detection and is specified with a 1 kA breaking capacity and 0.005 Ohm DC cold resistance. Both parts are RoHS non-compliant and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8536.10.0020).

Physical dimensions show a minor variation in length (0.812" vs. 0.875"), which remains within the 7AG form factor specification and should not affect holder compatibility.

Frequently Asked Questions (FAQ)

Q: Can the Eaton AGW-15 be used as a direct replacement for the Littelfuse 0303015.M?

A: Yes. Both parts share identical current rating (15 A), voltage rating (32 V AC), fuse type (cartridge, glass), and package specification (7AG, 1/4" x 7/8"). The primary functional difference is response time (fast blow vs. medium blow). Verify that your application's circuit design accommodates the faster response characteristic of the AGW-15.

Q: What is the significance of the response time difference between these parts?

A: Response time determines how quickly the fuse element melts under fault conditions. Medium-blow fuses tolerate brief inrush currents before opening, while fast-blow fuses open more rapidly. Select based on your circuit's inrush current profile and protection requirements.

Q: Are there any physical compatibility concerns with the AGW-15?

A: The AGW-15 is 0.063" longer (0.875" vs. 0.812") but remains within 7AG specifications. Verify that your fuse holder accommodates this length variation, though standard 7AG holders typically accept this range.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the Littelfuse 0303015.M and Eaton AGW-15 carry identical ECCN (EAR99) and HTSUS (8536.10.0020) classifications and are RoHS non-compliant.

Q: What is the breaking capacity specification?

A: The Littelfuse 0303015.M does not specify breaking capacity. The Eaton AGW-15 specifies 1 kA breaking capacity at rated voltage. Confirm your application's fault current requirements do not exceed this limit.