Littelfuse 030707.5H Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 030707.5H is a 7.5 A, 32 V AC/DC glass cartridge fuse in the 7AG form factor (1/4" x 7/8"). This fast-blow fuse is designed for circuit protection in applications requiring reliable overcurrent interruption at low voltage levels. The part is currently active in production with UL approval and ROHS3 compliance. Equivalent and substitute parts may be required due to inventory availability, packaging preferences, or specific application requirements while maintaining identical electrical and mechanical performance.

Substiute Parts

030707.5H

Littelfuse Inc.In Stock: 939030707.5H Datasheet

Current PartRFQ

0SFE07.5V

Littelfuse Inc.In Stock: 11900SFE07.5V Datasheet

Parametric EquivalentRFQ

0SFE07.5VP

Littelfuse Inc.In Stock: 10130SFE07.5VP Datasheet

Parametric EquivalentRFQ

BK/SFE-7-1/2

Eaton - Electronics DivisionIn Stock: 757BK/SFE-7-1/2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 030707.5H is determined by strict equivalence across the following parameters: current rating (7.5 A), AC voltage rating (32 V), DC voltage rating (32 V), fuse type (cartridge glass), package designation (7AG, 1/4" x 7/8"), and response time (fast blow). All identified substitutes maintain these core electrical and mechanical specifications, ensuring direct interchangeability in circuit protection applications.

The substitute parts are grouped into two categories:

Parametric Equivalents (Littelfuse): Parts 0SFE07.5V and 0SFE07.5VP are direct electrical equivalents manufactured by Littelfuse. These parts differ only in packaging format (bulk versus 5-pack card), with identical electrical ratings and mechanical dimensions.

Manufacturer Recommended Equivalent (Eaton): Part BK/SFE-7-1/2 is a cross-manufacturer equivalent from Eaton - Electronics Division. This part maintains all critical electrical parameters and mechanical form factor, with a dimension variance of 0.001" in length (22.20mm versus 22.23mm), which is within standard manufacturing tolerance and does not affect functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The Littelfuse 030707.5H remains the preferred choice for new designs and applications requiring ROHS3 compliance and UL certification. This part is actively produced and maintains full regulatory compliance.

Littelfuse Parametric Equivalents (0SFE07.5V, 0SFE07.5VP): These parts are direct substitutes for the 030707.5H and are recommended when inventory constraints or packaging requirements necessitate an alternative. Both maintain identical electrical specifications, ROHS3 compliance, and active production status. Selection between 0SFE07.5V (bulk packaging) and 0SFE07.5VP (5-pack card) depends on procurement quantity requirements.

Eaton BK/SFE-7-1/2: This cross-manufacturer equivalent is suitable for applications where Littelfuse parts are unavailable. However, this part does not meet ROHS3 compliance requirements. Selection of this substitute should be limited to legacy systems or applications where RoHS compliance is not mandated. The minor dimensional variance (0.001" in length) is within standard manufacturing tolerance and does not affect mechanical fit or electrical performance in standard 7AG fuse holders.

Frequently Asked Questions (FAQ)

Q: Can 0SFE07.5V and 0SFE07.5VP be used interchangeably with 030707.5H?

A: Yes. Both parts are parametric equivalents with identical electrical ratings (7.5 A, 32 V AC/DC), fuse type (cartridge glass), package designation (7AG), and response time (fast blow). The only difference is packaging format: 0SFE07.5V is supplied in bulk, while 0SFE07.5VP is supplied in 5-pack card format. Selection depends on procurement quantity and storage requirements.

Q: Is the Eaton BK/SFE-7-1/2 a direct replacement for 030707.5H?

A: The Eaton part is electrically and mechanically compatible with the 030707.5H for circuit protection function. However, it is not RoHS3 compliant, whereas the Littelfuse 030707.5H is. The dimensional difference of 0.001" in length is within standard manufacturing tolerance and does not affect fit in standard 7AG fuse holders. Use this substitute only when Littelfuse equivalents are unavailable and RoHS compliance is not required.

Q: What parameters must remain constant for a part to be considered a substitute?

A: The following parameters must match exactly: current rating (7.5 A), DC voltage rating (32 V), fuse type (cartridge glass), and package designation (7AG, 1/4" x 7/8"). AC voltage rating should also match (32 V) where specified. Response time (fast blow) should be maintained for consistent circuit protection characteristics.

Q: Are there any compliance differences between the substitute parts?

A: Yes. The Littelfuse parts (030707.5H, 0SFE07.5V, 0SFE07.5VP) are ROHS3 compliant. The Eaton BK/SFE-7-1/2 is RoHS non-compliant. Both Littelfuse and Eaton parts are REACH unaffected. UL approval is specified for 030707.5H and BK/SFE-7-1/2; approval agency information is not provided for the Littelfuse 0SFE series.

Q: Does packaging format affect electrical performance?

A: No. The packaging format (bulk versus 5-pack card) does not affect electrical performance. Parts 0SFE07.5V and 0SFE07.5VP have identical electrical specifications and differ only in how they are supplied and stored.