ECSR350 Equivalent & Substitute Parts Reference

Part Overview

The ECSR350 is a 350A 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 876 units in stock. Equivalent and substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when application requirements permit interchangeability based on electrical and mechanical specifications.

Substiute Parts

ECSR350

Eaton - Bussmann Electrical DivisionIn Stock: 907ECSR350 Datasheet

Current PartRFQ

FRS-R-350

Eaton - Bussmann Electrical DivisionIn Stock: 1043FRS-R-350 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECSR350 is determined by the following critical parameters:

• Current Rating: 350A (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)
• Mounting Type: Requires Holder (exact match required)
• Breaking Capacity @ Rated Voltage: 200kA minimum (exact match required)

The FRS-R-350 meets all substitution criteria for AC applications at 600 VAC and 350A. This part maintains identical current rating, voltage rating for AC operation, fuse class, response time, physical dimensions, and breaking capacity. The FRS-R-350 additionally provides 250 VDC capability, which does not restrict its use in 600 VAC applications.

Parameter Comparison

Engineering Selection Recommendations

Both the ECSR350 and FRS-R-350 are active products from Eaton - Bussmann Electrical Division with identical certifications (CE, CSA, UL) and RoHS compliance. Selection between these parts for 600 VAC, 350A applications is based on availability and inventory status. The FRS-R-350 provides additional DC voltage capability (250 VDC) without compromising AC performance specifications. Both parts meet the same breaking capacity requirement of 200kA at rated voltage and maintain identical physical dimensions for holder compatibility.

Frequently Asked Questions (FAQ)

Q: Can the FRS-R-350 be used as a direct replacement for the ECSR350 in 600 VAC applications?

A: Yes. The FRS-R-350 meets all critical substitution parameters: 350A current rating, 600 VAC voltage rating, RK5 class, slow-blow response time, 200kA breaking capacity, and identical physical dimensions (2.340" Dia x 11.630" L). Both parts require the same holder type.

Q: What is the significance of the FRS-R-350 having a 250 VDC rating in addition to 600 VAC?

A: The 250 VDC rating expands the application range of the FRS-R-350 beyond the ECSR350. For 600 VAC applications, this additional rating does not affect performance or compatibility. The part remains fully suitable for AC-only circuits.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both the ECSR350 and FRS-R-350 have 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 are certified by CE, CSA, and UL, and both are RoHS compliant. Regulatory compliance is equivalent.

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

A: The ECSR350 specifies 200kA breaking capacity at rated voltage. The FRS-R-350 specifies 200kA AC and 20kA DC. For 600 VAC applications, the AC breaking capacity is identical at 200kA.