Eaton NFMI33F Mechanical Interlock - KEMA Certified
Part Number: NFMI33F
Quick Summary
NFMI33F mechanical interlock from Eaton enables safe interlock control for NF frame electrical protection assemblies. Maintenance teams often contend with accidental energization during service; this interlock reduces risk by enforcing correct sequence. It carries KEMA, DNV GL, ABS, and Lloyd's Register certifications, along with CE and CCC marks for global compliance. As part of the NRX family for NF frame panels, it supports safer operation, faster maintenance, and predictable lifecycle costs. For engineers sourcing reliable, globally certified interlocks, NFMI33F delivers traceable performance with standard 9 inch length and 4.5 inch width. That translates to reduced commissioning time, lower spares inventory, and improved uptime across panel assemblies.
Product Information
Extended Description
NFMI33F Eaton: Eaton Power Defense ICCB mechanical interlock, Fixed breaker, NF Frame, Three-Way Cable Type 33
Product Name
Eaton Series NRX mechanical interlock
Catalog Number
NFMI33F
UPC
786685673349
Product Length/Depth
9 in
Product Height
2.25 in
Product Width
4.5 in
Product Weight
7 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.
Compliances
SABA Listed CCC Marked CE Marked
Certifications
KEMA Certified DNV GL Certified ABS Certified Lloyd's Register Certified
Type
Type 33 fixed
Circuit breaker type
Fixed
Frame
NF
Accessories
Mechanical interlock
Series
Series NRX
Feature: NRX mechanical interlock designed for Type 33 fixed breakers within the NF frame. Business Impact: Guarantees proper interlock sequencing, preventing energization when the door is open or the handle is not in the safe position, which reduces unplanned downtime and safety incidents. Application: Ideal for motor control centers and safety-critical control panels in manufacturing environments. Feature: Three-Way Cable Type 33 configuration. Business Impact: Simplifies wiring layouts and increases reliability by delivering consistent interlock action across multiple poles. Application: Retrofit projects and new builds requiring precise interlock timing in NF frame circuits. Feature: Global certifications and compliance (CE, CCC, SABA listed, KEMA, DNV GL, ABS, Lloyd's Register). Business Impact: Accelerates regulatory acceptance and minimizes audit risk in diverse geographic deployments. Application: International installations and regulated industries seeking robust documentation. Feature: Compact dimensions and weight (9 in L, 4.5 in W, 2.25 in H; 7 lb). Business Impact: Enables fit in tight enclosures, reduces panel footprint, and simplifies mounting. Application: Space-constrained control cabinets and panel upgrades in compact facilities. Feature: Warranty and support aligned with Eaton policy. Business Impact: One-year warranty plus documented service options lowers total cost of ownership and increases project confidence. Application: New builds and retrofits requiring long-term reliability and predictable maintenance.
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FAQs
Yes. NFMI33F is designed for the NF frame and Type 33 fixed breakers, part of Eaton's NRX interlock family. Its three-way cable Type 33 configuration supports reliable interlock operation in standard control panels and motor control centers, enabling straightforward retrofits or new builds within compatible NF frame enclosures.
NFMI33F provides a 9 inch length, 4.5 inch width, and 2.25 inch height footprint with a 7 lb weight. It integrates a mechanical interlock accessory for NRX, Type 33 fixed breakers, and NF frame compatibility, delivering enforced interlock sequencing to prevent energization when not in the safe condition.
NFMI33F is well-suited for industrial control panels, MCCs, and safety-critical equipment where reliable interlock sequencing is required. It supports three-way interlock configurations for NF frame installations and enhances operator safety while reducing unplanned downtime in manufacturing, processing, and packaging environments.
NFMI33F holds KEMA, DNV GL, ABS, and Lloyd's Register certifications, plus CE and CCC marks. These certifications validate safety, quality, and regulatory compliance across global markets, simplifying audits, enabling smoother international deployments, and supporting customer requirements for certified electrical protection components.
NFMI33F is covered by Eaton's standard warranty of one year from installation or eighteen months from shipment, whichever occurs first. This, combined with robust interlock reliability and global certifications, helps reduce maintenance costs, minimize downtime, and improve total cost of ownership for panel builds and retrofits.