ECSR20 Equivalent & Substitute Parts Reference

Part Overview

The ECSR20 is a 20A 600VAC cartridge fuse manufactured by Eaton - Bussmann Electrical Division. This slow-blow fuse cartridge requires a compatible holder for installation and is designed for electrical and industrial applications. The part is currently active in production with 1122 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when system requirements permit equivalent functionality.

Substiute Parts

ECSR20

Eaton - Bussmann Electrical DivisionIn Stock: 1133ECSR20 Datasheet

Current PartRFQ

FRS-R-20

Eaton - Bussmann Electrical DivisionIn Stock: 682FRS-R-20 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The FRS-R-20 is identified as a substitute for the ECSR20 based on the following critical parameters that determine substitutability:

Matching Parameters:

• Current Rating: 20A (identical)
• Voltage Rating - AC: 600 VAC (identical)
• Response Time: Slow Blow (identical)
• Class: RK5 (identical)
• Breaking Capacity @ Rated Voltage: 200kA AC (identical)
• Fuse Type: Cartridge (identical)
• Mounting Type: Requires Holder (identical)
• Approval Agency: CE, CSA, UL (identical)
• RoHS Status: RoHS Compliant (identical)

Differing Parameters:

• Voltage Rating - DC: FRS-R-20 includes 300 VDC rating; ECSR20 has no DC rating specified
• Size / Dimension: FRS-R-20 is 0.810" Dia x 3.00" L (20.57mm x 76.20mm); ECSR20 is 0.810" Dia x 5.00" L (20.57mm x 127.00mm)
• Series: FRS-R-20 belongs to Fusetron™ FRS-R series; ECSR20 belongs to ECSR series

The dimensional difference requires verification of holder compatibility before substitution.

Parameter Comparison

Engineering Selection Recommendations

Both the ECSR20 and FRS-R-20 are active products from Eaton - Bussmann Electrical Division with identical electrical ratings for AC applications: 20A at 600 VAC, RK5 class, slow-blow response, and 200kA breaking capacity. Both carry CE, CSA, and UL approvals and are RoHS compliant.

The primary consideration for substitution is the physical dimension difference. The FRS-R-20 has a shorter length (3.00" vs. 5.00") while maintaining the same diameter (0.810"). This dimensional variance requires confirmation that the FRS-R-20 will fit within the existing fuse holder designed for the ECSR20.

The FRS-R-20 provides additional DC capability (300 VDC) not specified in the ECSR20, which may be advantageous in applications requiring dual-voltage operation but does not affect AC-only applications.

Frequently Asked Questions (FAQ)

Q: Can the FRS-R-20 be used as a direct replacement for the ECSR20?

A: Both parts share identical electrical specifications for AC applications (20A, 600 VAC, RK5 class, slow-blow, 200kA breaking capacity) and carry the same approvals. However, the FRS-R-20 is physically shorter (3.00" vs. 5.00" length). Compatibility depends on whether the existing fuse holder accommodates the shorter cartridge length.

Q: What is the significance of the RK5 class rating?

A: RK5 is a fuse class designation that defines the fuse's performance characteristics, including breaking capacity and response time. Both parts are RK5 class, ensuring equivalent protection characteristics in the circuit.

Q: Does the FRS-R-20's DC voltage rating affect AC-only applications?

A: No. The FRS-R-20's additional 300 VDC rating does not impact performance in AC-only circuits. The 600 VAC rating remains the controlling specification for AC applications.

Q: Are both parts currently available?

A: Yes. The ECSR20 has 1122 units in stock, and the FRS-R-20 has 658 units in stock from Eaton - Bussmann Electrical Division.

Q: What approvals do these fuses carry?

A: Both the ECSR20 and FRS-R-20 carry CE, CSA, and UL approvals, meeting international and North American safety standards.