SR-5F-2.5A-BK Equivalent & Substitute Parts

Part Overview

The SR-5F-2.5A-BK is a 2.5 A, 250 V AC/DC board mount fuse manufactured by Eaton - Electronics Division. This fast-blow fuse is designed for through-hole radial mounting in vertical orientation and is classified as Active product status. The fuse features a radial, can-style package with a breaking capacity of 50 A at rated voltage and operates across a temperature range of -40°C to 125°C.

Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and functional characteristics align with the original specification, enabling direct replacement in circuit protection applications without design modification.

Substiute Parts

SR-5F-2.5A-BK

Eaton - Electronics DivisionIn Stock: 898SR-5F-2.5A-BK Datasheet

Current PartRFQ

37012500410

LittelfuseIn Stock: 316237012500410 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SR-5F-2.5A-BK is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can, Vertical (exact match required)
• Breaking Capacity @ Rated Voltage: 50 A (exact match required)

Acceptable Variation Parameters:

• Operating Temperature Range: Substitute must support the minimum operating temperature of -40°C; upper temperature limit may differ
• Size / Dimension: Radial lead spacing and can diameter must be identical; height variation within 0.010" (0.25mm) is acceptable for through-hole mounting
• Melting I²t: Variation permitted within fast-blow fuse classification standards
• Approval Agencies: Substitute must hold at minimum one common certification (cULus, PSE, or equivalent)

The substitute part 37012500410 (Littelfuse TR5® 370 series) meets all critical matching parameters and is therefore classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the SR-5F-2.5A-BK and 37012500410 are Active product status components with identical electrical ratings (2.5 A, 250 V AC, fast-blow response) and mechanical compatibility (through-hole radial mounting, 0.335" diameter can).

Eaton SR-5F-2.5A-BK:

• Supports extended operating temperature range to 125°C
• Holds cULus and PSE certifications
• RoHS Compliant status

Littelfuse 37012500410 (TR5® 370):

• Supports operating temperature range to 85°C
• Holds expanded certification portfolio: CCC, cURus, PSE, SEMKO, VDE
• ROHS3 Compliant status
• Higher inventory availability (3072 pcs vs. 831 pcs)

Selection between these parts is determined by application-specific requirements: choose SR-5F-2.5A-BK for applications requiring operation above 85°C; choose 37012500410 for applications requiring expanded international certifications or when higher inventory availability is prioritized.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 37012500410 replace the Eaton SR-5F-2.5A-BK in all applications?

A: The Littelfuse 37012500410 is electrically and mechanically equivalent for applications operating at or below 85°C. Applications requiring operation above 85°C must use the Eaton SR-5F-2.5A-BK due to its extended temperature rating to 125°C.

Q: Are the physical dimensions identical between these two fuses?

A: The can diameter is identical at 0.335" (8.50mm). The height differs by 0.004" (0.10mm): Eaton SR-5F-2.5A-BK is 0.319" H (8.10mm), while Littelfuse 37012500410 is 0.315" H (8.00mm). This dimension difference does not affect through-hole mounting compatibility.

Q: What does the difference in Melting I²t values indicate?

A: Melting I²t is a thermal characteristic of the fuse element. The Eaton part specifies 15 while the Littelfuse part specifies 1.8. Both parts are classified as fast-blow fuses and meet the 50 A breaking capacity requirement at 250 V. The difference reflects design variations between manufacturers but does not affect substitution eligibility for equivalent circuit protection.

Q: Which certifications are most important for my application?

A: Selection depends on your market and regulatory requirements. Both parts hold PSE certification. The Eaton part holds cULus certification; the Littelfuse part holds cURus, CCC, SEMKO, and VDE certifications in addition to PSE. Verify your application's specific certification requirements before selection.

Q: Are both parts RoHS compliant?

A: Yes. The Eaton SR-5F-2.5A-BK is RoHS Compliant. The Littelfuse 37012500410 is ROHS3 Compliant, which represents a more recent RoHS directive revision and includes additional substance restrictions.