Eaton RFMI33F Mechanical Interlock - ANSI CSA UL Listed
Part Number: RFMI33F
Quick Summary
RFMI33F mechanical interlock provides secure interlock control for RF frame breakers in three-way switching applications. Engineers face misalignment risks and accidental re-energization during maintenance, leading to costly downtime. This interlock kit carries ANSI, CSA, and UL Listed certifications, reinforcing safety and reliability in demanding environments. As part of Eaton's NRX lineup, it aligns with fixed breakers and three-way mounting, simplifying procurement and service. By standardizing on NRX-compatible interlocks, maintenance teams can reduce spare-part variety and ensure consistent performance across panels, delivering faster changeovers and improved adherence to NEMA expectations. The combination of robust mechanical design and verified certifications supports safer operation and predictable lifecycle costs in industrial control cabinets.
Product Information
Extended Description
RFMI33F Eaton: Eaton Power Defense ICCB mechanical interlock, Fixed breaker, RF Frame, Three-Way Cable Type 33
Product Name
Eaton Series NRX mechanical interlock
Catalog Number
RFMI33F
UPC
786685703640
Product Length/Depth
9 in
Product Height
2.25 in
Product Width
4.5 in
Product Weight
11 lb
Warranty
One year factory warranty issued from date of shipment from repair center
Compliances
NEMA Compliant
Certifications
ANSI CSA Certified UL Listed
Type
Mechanical interlock kit
Circuit breaker type
Fixed
Frame
RF
Accessories
Mechanical interlock
Mounting Method
Three-way fixed
Series
Series NRX
Three-way mounting with RF frame compatibility enables quick installation and consistent mounting practice, reducing field labor time and configuration errors. This directly lowers commissioning costs and accelerates panel readiness for machine control and power distribution applications. The NRX mechanical interlock kit is designed for fixed breakers, delivering reliable interlock operation and clear safety indication in demanding industrial environments. By standardizing on NRX-compatible interlocks, OEMs can streamline procurement, minimize spare parts, and ensure uniform performance across multiple panels. The included interlock accessory simplifies retrofits and reduces field customization, extending service life and lowering maintenance costs in packaging lines and automated production cells. Certifications including ANSI, CSA, and UL Listed, along with NEMA compliance, support regulatory alignment and safer operation in facilities with strict safety requirements. Dimensional and weight specifications (9 in L, 4.5 in W, 2.25 in H, 11 lb) aid handling and installation planning, while a one-year factory warranty provides assurance through the lifecycle of the control system.
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FAQs
RFMI33F is a mechanical interlock kit designed for the RF frame NRX series with three-way fixed mounting. It supports fixed breakers and is intended for three-way interlocking in machine control panels and distribution cabinets. This compatibility simplifies installation and ensures predictable interlock behavior across NRX configurations.
RFMI33F carries ANSI, CSA, and UL Listed certifications, with NEMA compliance noted for broader safety and reliability in industrial environments. These certifications help meet global regulatory requirements, support safe operation in control cabinets, and simplify compliance during audits and procurement.
Yes. The RFMI33F interlock kit is designed for three-way fixed mounting on RF frame NRX breakers, making it well-suited for motor-control panels where precise sequencing and lockout functionality are critical. It helps prevent mis-energization during maintenance and streamlines panel commissioning.
The interlock satisfies NEMA compliance and carries ANSI CSA UL Listed certifications, aligning with common regulatory and safety standards in industrial facilities. This supports safer operation, easier risk management, and smoother acceptance in regulated environments.
RFMI33F provides measurable uptime improvements by reducing misoperation and accidental energization. Its NRX compatibility minimizes spare-parts variety, speeds up servicing, and lowers lifecycle costs. The one-year warranty further mitigates risk during initial deployment and early field use.