ECNR20 Equivalent & Substitute Parts Reference

Part Overview

The ECNR20 is a 20A cartridge fuse rated for 250 VAC and 125 VDC operation, manufactured by Eaton - Bussmann Electrical Division. This slow-blow fuse cartridge is designed for electrical and industrial applications requiring RK5 class protection with a breaking capacity of 200kA at rated voltage. The part is currently active in production with RoHS compliance certification. Substitute parts are identified when equivalent electrical and mechanical specifications are required for component sourcing, inventory management, or application-specific requirements.

Substiute Parts

ECNR20

Eaton - Bussmann Electrical DivisionIn Stock: 957ECNR20 Datasheet

Current PartRFQ

FRN-R-20

Eaton - Bussmann Electrical DivisionIn Stock: 1029FRN-R-20 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECNR20 is determined by strict equivalence across the following critical parameters:

• Current Rating: 20A (exact match required)
• Voltage Rating: 250 VAC / 125 VDC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Response Time: Slow Blow (exact match required)
• Class: RK5 (exact match required)
• Physical Dimensions: 0.560" Dia x 2.000" L (exact match required)
• Mounting Configuration: Requires Holder (exact match required)

The FRN-R-20 meets all substitution criteria as it maintains identical electrical ratings, fuse classification, response characteristics, and physical form factor. Both parts are manufactured by Eaton - Bussmann Electrical Division and carry equivalent international certifications.

Parameter Comparison

Engineering Selection Recommendations

Both ECNR20 and FRN-R-20 are functionally equivalent for electrical and mechanical circuit protection applications. Selection between these parts should be based on regulatory and compliance requirements specific to the end application.

The ECNR20 is suitable for applications requiring RoHS compliance certification. The FRN-R-20 (Fusetron™ FRN-R series) is suitable for applications where RoHS compliance is not a requirement. Both parts carry identical international safety certifications (CE, CSA, UL) and maintain active production status with Eaton - Bussmann Electrical Division.

Frequently Asked Questions (FAQ)

Q: Can FRN-R-20 be used as a direct replacement for ECNR20?

A: Yes, from an electrical and mechanical standpoint. Both parts have identical current ratings (20A), voltage ratings (250 VAC / 125 VDC), fuse class (RK5), response time (Slow Blow), and physical dimensions (0.560" Dia x 2.000" L). The primary difference is RoHS compliance status. Verify that RoHS compliance requirements do not apply to your application before substitution.

Q: What does RK5 class mean for these fuses?

A: RK5 is a fuse classification standard that defines the breaking capacity and performance characteristics of the fuse under fault conditions. Both ECNR20 and FRN-R-20 are rated RK5 class with a breaking capacity of 200kA at rated voltage.

Q: Do these fuses require a specific holder?

A: Yes. Both ECNR20 and FRN-R-20 are cartridge fuses that require a compatible fuse holder for installation. The physical dimensions (0.560" Dia x 2.000" L) must match the holder specifications.

Q: What is the difference in breaking capacity specifications between the two parts?

A: ECNR20 specifies 200kA breaking capacity at rated voltage. FRN-R-20 specifies 200kA AC and 20kA DC. Both meet the 200kA AC requirement. For DC applications, FRN-R-20 provides 20kA DC breaking capacity. Confirm DC breaking capacity requirements for your specific application.

Q: Are both parts currently available?

A: Yes. ECNR20 has 921 pieces in stock, and FRN-R-20 has 1006 pieces in stock as new original inventory.