SFE-7-1/2 Equivalent & Substitute Parts

Part Overview

The SFE-7-1/2 is a 7.5 A fast-blow glass cartridge fuse rated for 32 V DC operation in a 7AG form factor (1/4" x 7/8"). Manufactured by Eaton - Electronics Division, this component is classified as Active product status. The fuse requires a compatible holder for installation and is approved by UL. Identifying equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate varying availability across distribution channels while maintaining electrical and mechanical compatibility.

Substiute Parts

SFE-7-1/2

Eaton - Electronics DivisionIn Stock: 1010SFE-7-1/2 Datasheet

Current PartRFQ

BK/SFE-7-1/2

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

Parametric EquivalentRFQ

FSW-7.5A

OptiFuseIn Stock: 3433FSW-7.5A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SFE-7-1/2 are determined by strict equivalence across the following critical parameters:

• Current Rating: 7.5 A (exact match required)
• Voltage Rating - DC: 32 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 7AG, 1/4" x 7/8" (exact match required)
• Physical Dimensions: 0.250" Dia x 0.874" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes. The SFE-7-1/2 has two identified substitutes: BK/SFE-7-1/2 (Eaton - Electronics Division) and FSW-7.5A (OptiFuse).

Parameter Comparison

Engineering Selection Recommendations

All three parts—SFE-7-1/2, BK/SFE-7-1/2, and FSW-7.5A—are classified as Active products and carry UL approval certifications, confirming their suitability for direct substitution in applications requiring 7.5 A, 32 V DC fast-blow glass cartridge fuses in 7AG form factor.

SFE-7-1/2 (Eaton - Electronics Division): Primary part with 993 units in stock. Suitable for all applications requiring the specified electrical and mechanical parameters.

BK/SFE-7-1/2 (Eaton - Electronics Division): Direct equivalent from the same manufacturer with 693 units in stock. Designated as RoHS non-compliant; selection depends on regulatory requirements of the end application.

FSW-7.5A (OptiFuse): Parametric equivalent with 3382 units in stock. Offers ROHS3 compliance and specified breaking capacity of 1kA at rated voltage. Includes AC voltage rating of 32 V in addition to DC rating. Selection is appropriate for applications requiring RoHS3 compliance or higher breaking capacity specification.

Frequently Asked Questions (FAQ)

Q: Can FSW-7.5A be used as a direct replacement for SFE-7-1/2?

A: Yes. FSW-7.5A meets all critical electrical and mechanical parameters: 7.5 A current rating, 32 V DC voltage rating, fast-blow response, 7AG package, and identical physical dimensions. Both parts are UL-approved and Active status.

Q: What is the difference between SFE-7-1/2 and BK/SFE-7-1/2?

A: Both parts are manufactured by Eaton - Electronics Division and are electrically and mechanically identical. The primary difference is RoHS compliance status: BK/SFE-7-1/2 is designated as RoHS non-compliant. Selection depends on whether the application or end-use market requires RoHS compliance.

Q: Does FSW-7.5A have any advantages over the Eaton parts?

A: FSW-7.5A is ROHS3 compliant and specifies a breaking capacity of 1kA at rated voltage, whereas the Eaton parts do not provide this specification. FSW-7.5A also includes an AC voltage rating of 32 V, making it suitable for both AC and DC applications at the same voltage level.

Q: Are all three parts mechanically interchangeable?

A: Yes. All three parts share identical physical dimensions (0.250" Dia x 0.874" L) and the same 7AG package specification. All require a compatible 7AG fuse holder for installation.

Q: Which part should be selected for new designs?

A: Selection depends on specific application requirements. For DC-only applications without RoHS requirements, any part is suitable. For applications requiring RoHS3 compliance, FSW-7.5A is the appropriate choice. For applications requiring both AC and DC operation at 32 V, FSW-7.5A is the only part with specified AC rating.

Q: Are there any voltage or current derating considerations when substituting these parts?

A: No. All three parts are rated identically at 7.5 A and 32 V DC. No derating is required when substituting between them.