Equivalent & Substitute Parts for Littelfuse 0303002.M

Part Overview

The Littelfuse 0303002.M is a 2 A, 32 V AC/DC glass cartridge fuse with a 7AG form factor (1/4" x 7/8"). This component is classified as obsolete, necessitating identification of active equivalent parts for continued system support and procurement. The fuse requires a compatible holder for installation and operates with medium blow response characteristics.

Substiute Parts

0303002.M

Littelfuse Inc.In Stock: 11420303002.M Datasheet

Current PartRFQ

BK/AGW-2

Eaton - Electronics DivisionIn Stock: 1179BK/AGW-2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 0303002.M is determined by the following critical parameters:

• Current Rating: 2 A (exact match required)
• Voltage Rating (AC): 32 V (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 BK/AGW-2 meets all substitution criteria. While the response time differs (Fast Blow vs. Medium Blow) and dimensional tolerance varies slightly (0.875" L vs. 0.812" L), these parameters remain within the 7AG standard specification and do not preclude functional equivalence in holder-based applications. The substitute part is currently active in production, addressing the obsolescence status of the original component.

Parameter Comparison

Engineering Selection Recommendations

The Eaton BK/AGW-2 is the designated substitute for the obsolete Littelfuse 0303002.M. Selection is based on:

• Exact electrical parameter matching (2 A, 32 V AC/DC)
• Identical 7AG form factor and holder compatibility
• Active product status ensuring long-term availability and supply chain continuity
• Equivalent RoHS compliance classification
• Documented breaking capacity (1 kA) providing additional performance specification data

The response time difference (Fast Blow vs. Medium Blow) reflects manufacturing evolution within the 7AG cartridge fuse category and does not compromise functional equivalence in standard holder-based circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can the Eaton BK/AGW-2 be used as a direct replacement for the Littelfuse 0303002.M?

A: Yes. Both components share identical current rating (2 A), voltage rating (32 V AC), fuse type (cartridge glass), and 7AG package specification. The substitute is compatible with all holders designed for 7AG cartridge fuses.

Q: What is the significance of the response time difference (Medium Blow vs. Fast Blow)?

A: Response time indicates the speed at which the fuse element melts under overcurrent conditions. Fast Blow fuses respond more quickly to transient overcurrents. Both response types are standard within the 7AG cartridge fuse category and are selected based on circuit requirements. Verify circuit design specifications to confirm Fast Blow operation is acceptable.

Q: Why is the length specification different (0.812" vs. 0.875")?

A: Both dimensions fall within the 7AG standard specification tolerance. The 0.250" diameter is identical. Standard 7AG holders accommodate both dimensions without modification.

Q: Is the Eaton BK/AGW-2 available in the same packaging as the original part?

A: The substitute is supplied in bulk packaging, whereas original inventory information specifies standard packaging. Confirm packaging requirements with procurement specifications.

Q: What does the 1 kA breaking capacity specification indicate?

A: Breaking capacity defines the maximum fault current the fuse can safely interrupt at rated voltage. The Eaton substitute provides this specification (1 kA at 32 V), whereas the original part does not document this parameter. This represents enhanced specification transparency for the substitute component.