Eaton RFMI33D NRX mechanical interlock - UL Listed
Part Number: RFMI33D
Quick Summary
Eaton RFMI33D NRX mechanical interlock provides fail-safe interlocking for drawout RF frame breakers in industrial electrical panels. This solution addresses the common risk of accidental energization during maintenance or panel access, helping crews work more safely. UL Listed certification supports compliance with safety standards, and the Type 33 drawout design matches Eaton’s RF frame configurations. The interlock integrates with a three-way cable Type 33, streamlining installation and improving protective sequencing. For engineers and procurement teams, the result is faster commissioning, lower maintenance risk, and predictable protection performance across Eaton NRX systems. Its rugged construction also supports vibration-prone environments in industrial facilities. This aligns with maintenance best practices and supplier reliability expectations.
Product Information
Extended Description
RFMI33D Eaton: Eaton Power Defense ICCB mechanical interlock, Drawout breaker, RF Frame, Three-Way Cable Type 33
Product Name
Eaton Series NRX mechanical interlock
Catalog Number
RFMI33D
UPC
786685624600
Product Length/Depth
13 in
Product Height
8.5 in
Product Width
10.5 in
Product Weight
9 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed
Type
Type 33
Circuit breaker type
Drawout
Frame
RF
Accessories
Mechanical interlock
Series
Series NRX
Feature: Catalog Number RFMI33D and the NRX mechanical interlock provide precise part identification and proven compatibility with Eaton RF frame assemblies. This feature reduces procurement errors and simplifies lifecycle management in large panel ecosystems. Business impact: faster material handling and fewer incorrect substitutions, which lowers downtime caused by misordered components. Application: ideal for drawout type breakers within Type 33, RF frame configurations, and three-way cable Type 33 wiring schemes. Feature: Mechanical interlock design prevents breaker re-energization during maintenance, protecting technicians. Business impact: enhances worker safety, lowers incident risk, and supports compliant lockout-tagout procedures. Application: widely used in services and retrofits across manufacturing plants and utility panels where access requires safe sequencing. Feature: NRX Series compatibility with RF frame and Type 33 integration minimizes field modification needs and reduces installation time by leveraging standardized mounting. Application: easy to install in existing NRX RF frame installations with three-way Type 33 cables. Feature: Warranty and service terms provide predictable risk management. Business impact: reduces total cost of ownership with a one-year warranty from installation or eighteen months from shipment, whichever comes first. Application: procurement and maintenance planning across plant assets. Feature: UL Listed certification and Type 33 compatibility reinforce compliance and safe operation in industrial environments. Business impact: smoother regulatory alignment and reliable protection sequencing across Eaton NRX panels. Application: essential for panel builders and service providers designing safety-first protection schemes.
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FAQs
RFMI33D is designed to fit Eaton NRX mechanical interlock configurations on RF frame Drawout Type 33 breakers. It uses standard mounting patterns and a Three-Way Cable Type 33 approach, simplifying retrofit projects and new installations alike. This compatibility minimizes field modifications and reduces installation time while ensuring reliable interlock operation throughout the panel.
The RFMI33D interlock prevents inadvertent re-energization of a breaker while maintenance personnel access the panel. By ensuring proper sequencing and locking mechanics, it supports lockout-tagout procedures, reduces the risk of electric shock or arc flash, and helps technicians work in a controlled, verifiable safe state during service activities.
RFMI33D is catalogued as Eaton Series NRX mechanical interlock for Type 33, with dimensions of 13 inches in length, 8.5 inches in height, and 10.5 inches in width, weighing 9 pounds. It is UL Listed, with UPC 786685624600, and is intended for use with RF frame Drawout breakers and Three-Way Cable Type 33 assemblies.
Yes, RFMI33D is UL Listed, confirming adherence to established safety standards for electrical interlocks in industrial panels. This certification supports compliance in most North American facilities, simplifies supplier qualification, and provides assurance of consistent performance in protection sequencing and maintenance safety.
RFMI33D is covered by Eaton's warranty policy 25-000, offering one year from the date of installation or eighteen months from shipment, whichever occurs first. This provides predictable protection and supports a lower total cost of ownership, with access to Eaton support and documentation for installation, configuration, and field service guidance.