ECSR400 Equivalent & Substitute Parts Reference

Part Overview

The ECSR400 is a 400A 600VAC cylindrical fuse cartridge manufactured by Eaton - Bussmann Electrical Division. This component is designed for electrical and industrial applications requiring high-current protection in AC systems. The part is currently active in production with 733 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part's specifications, enabling direct replacement in compatible holder assemblies.

Substiute Parts

ECSR400

Eaton - Bussmann Electrical DivisionIn Stock: 834ECSR400 Datasheet

Current PartRFQ

FRS-R-400

Eaton - Bussmann Electrical DivisionIn Stock: 811FRS-R-400 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECSR400 is determined by strict alignment of the following critical parameters:

• Current Rating: 400A (exact match required)
• Voltage Rating - AC: 600 VAC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Response Time: Slow Blow (exact match required)
• Class: RK5 (exact match required)
• Physical Dimensions: 2.340" Dia x 11.630" L (exact match required for holder compatibility)
• Approval Certifications: CE, CSA, UL (minimum compliance required)

The FRS-R-400 meets all substitution criteria for AC applications. Additional DC voltage capability (300 VDC) does not disqualify this part as a substitute, as it represents an extended operational envelope while maintaining all AC specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the ECSR400 and FRS-R-400 are active production components from the same manufacturer with identical certifications (CE, CSA, UL) and RoHS compliance. Selection between these parts should be based on application requirements:

For AC-only systems operating at 600 VAC and 400A, either part is suitable. The FRS-R-400 provides additional operational flexibility through DC voltage capability (300 VDC) without compromising AC performance specifications. Both parts maintain identical physical dimensions, enabling direct installation in existing ECSR-compatible holders.

Frequently Asked Questions (FAQ)

Q: Can the FRS-R-400 replace the ECSR400 in existing installations?

A: Yes. Both parts share identical current rating (400A), AC voltage rating (600 VAC), physical dimensions (2.340" Dia x 11.630" L), fuse class (RK5), response time (Slow Blow), and approval certifications. Direct substitution is mechanically and electrically compatible.

Q: What is the significance of the FRS-R-400's 300 VDC rating?

A: The 300 VDC rating extends the operational envelope of the FRS-R-400 beyond AC applications. For AC-only circuits, this additional capability does not affect performance or compatibility with the ECSR400 specification.

Q: Are there dimensional differences between these parts?

A: No. Both the ECSR400 and FRS-R-400 maintain identical cylindrical dimensions of 2.340" diameter by 11.630" length (59.44mm x 295.40mm), ensuring compatibility with the same holder assemblies.

Q: Do both parts carry the same regulatory approvals?

A: Yes. Both parts hold CE, CSA, and UL certifications and are RoHS compliant, meeting identical regulatory requirements for electrical and industrial applications.

Q: What is the breaking capacity difference between these parts?

A: The ECSR400 specifies 200kA breaking capacity at rated voltage. The FRS-R-400 specifies 200kA AC and 20kA DC. For AC applications at 600 VAC, the breaking capacity is equivalent.