ECSR250 Equivalent & Substitute Parts Reference

Part Overview

The ECSR250 is a 250A 600VAC cylindrical fuse cartridge manufactured by Eaton - Bussmann Electrical Division. This slow-blow cartridge fuse is designed for electrical and industrial applications requiring a holder-mounted installation. The part is currently active in production with 1006 units in stock. Alternative equivalent parts may be required due to application-specific voltage requirements, supply chain considerations, or system design specifications that accommodate dual AC/DC voltage ratings.

Substiute Parts

ECSR250

Eaton - Bussmann Electrical DivisionIn Stock: 1062ECSR250 Datasheet

Current PartRFQ

FRS-R-250

Eaton - Bussmann Electrical DivisionIn Stock: 1101FRS-R-250 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The FRS-R-250 qualifies as an equivalent substitute for the ECSR250 based on the following critical parameters:

• Current Rating: Both parts are rated at 250A
• Voltage Rating - AC: Both parts are rated at 600 VAC
• Fuse Type: Both are cartridge-type fuses
• Response Time: Both are slow-blow fuses
• Class: Both are RK5 class
• Breaking Capacity: Both provide 200kA at rated AC voltage
• Physical Dimensions: Both measure 2.340" Dia x 11.630" L (59.44mm x 295.40mm)
• Mounting: Both require a holder for installation
• Compliance: Both carry CE, CSA, and UL approvals
• RoHS Status: Both are RoHS compliant

The FRS-R-250 provides extended functionality with an additional 300 VDC rating (20kA DC breaking capacity), making it suitable for applications requiring dual AC/DC voltage compatibility while maintaining full compatibility with AC-only systems.

Parameter Comparison

Engineering Selection Recommendations

Both the ECSR250 and FRS-R-250 are active products from Eaton - Bussmann Electrical Division with identical AC voltage and current ratings. Both carry full CE, CSA, and UL certifications and meet RoHS compliance requirements. Selection between these parts should be based on system voltage requirements: the ECSR250 is suitable for AC-only applications, while the FRS-R-250 accommodates systems requiring dual AC/DC voltage capability. Both parts maintain identical physical dimensions and holder compatibility, ensuring direct mechanical and electrical interchangeability within their respective voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can the FRS-R-250 be used as a direct replacement for the ECSR250?

A: Yes. The FRS-R-250 maintains identical current rating (250A), AC voltage rating (600 VAC), fuse class (RK5), response time (slow-blow), breaking capacity (200kA AC), physical dimensions (2.340" Dia x 11.630" L), and holder mounting requirements. Both parts carry identical certifications (CE, CSA, UL) and RoHS compliance.

Q: What is the primary difference between these two parts?

A: The FRS-R-250 includes an additional 300 VDC rating with 20kA DC breaking capacity, whereas the ECSR250 is rated for AC voltage only. This makes the FRS-R-250 suitable for hybrid AC/DC systems while remaining fully compatible with AC-only applications.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 2.340" Dia x 11.630" L (59.44mm x 295.40mm) and use the same cylindrical cartridge package with blade terminals. Both require the same holder for installation.

Q: Do both parts have the same approval certifications?

A: Yes. Both the ECSR250 and FRS-R-250 carry CE, CSA, and UL approvals and are RoHS compliant.

Q: Which part should be selected for a new design?

A: Selection depends on system voltage requirements. For AC-only systems, either part is acceptable. For systems requiring DC voltage capability or future AC/DC flexibility, the FRS-R-250 is the appropriate choice.