Eaton FLB141 WT20 3 Circuit Breaker - NEC/CEC
Part Number: FLB141 WT20 3
Quick Summary
Eaton FLB141 WT20 3 circuit breaker is a reliable overcurrent protection device for industrial electrical systems in hazardous locations. Engineers often wrestle with nuisance trips, difficult installations in explosion-hazard zones, and costly downtime. This model delivers NEC/CEC compliance and hazardous-location ratings (Class I, Division 1; Class II, Division 1; Class III), plus compatible NEMA ratings 3, 4, 7, 9, to ensure regulatory alignment. It is designed for 480 Vac systems with a 20 A, three-pole configuration, and a 1-1/4 inch trade size. The copper-free aluminum enclosure and threaded cover support rugged field service and safer maintenance, helping maintain production continuity while simplifying compliance documentation.
Product Information
Extended Description
FLB141 WT20 3 Eaton: Eaton Crouse-Hinds series FLB circuit breaker, 20A, EHD frame type, Thermal magnetic, Threaded cover construction, Copper-free aluminum, Cutler-Hammer breaker, Three-pole, Non-interchangeable trip, 1-1/4", 480 Vac
Product Name
Eaton Crouse-Hinds series FLB circuit breaker
Catalog Number
FLB141 WT20 3
UPC
782274450506
Product Length/Depth
8.5 in
Product Height
13.38 in
Product Width
9.13 in
Product Weight
44 lb
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class I, Division 2 Class II, Division 1 Class II, Division 2 Class III
NEMA Rating
3 4 7 9
Enclosure
With circuit breaker
Amperage Rating
20 A
Circuit breaker type
Thermal magnetic
Voltage rating
480 Vac
Number of poles
Three-pole
Trade size
1-1/4"
Manufacturer
Cutler-Hammer
Circuit breaker frame type
EHD
Enclosure cover construction
Threaded
Enclosure material
Copper-free aluminum
Special features
Non-interchangeable trip
FLB Series Explosionproof Circuit Breakers catalog page
FLB Explosionproof Circuit Breakers UL certification
FLB Explosionproof Circuit Breakers UL certification
IF 1016 - FLB Series Circuit Breakers
Eaton Specification Sheet - FLB141 WT20 3
Thermal magnetic trip provides precise overload and short-circuit protection, delivering quicker response to faults while minimizing nuisance trips. This translates into improved equipment availability and extended motor life in demanding environments. It is ideal for 20 A, three-pole circuits feeding motors and distribution panels in hazardous locations, including chemical plants and oil/gas facilities. The rugged enclosure features threaded cover and copper-free aluminum construction, reducing corrosion risk and simplifying field maintenance, which lowers replacement costs and supports safer servicing in difficult-to-access zones. It fits 1-1/4 inch trade size enclosures with the EHD frame, enabling straightforward retrofits and scalable protection across panel banks. The non-interchangeable trip prevents misconfiguration in multi-breaker installations, ensuring consistent protection and reducing the risk of accidental over-tripping. Documentation and UL/CSA resources from IF 1016 and related datasheets facilitate compliant installation and ongoing support.
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FAQs
Yes. The FLB141 WT20 3 is designed for hazardous locations and features a threaded enclosure cover with a copper-free aluminum body. It fits 1-1/4 inch trade size enclosures and uses an EHD frame, making retrofits and field installations straightforward while maintaining a robust IP/area-class rating for Class I and II locations.
The unit is NEC/CEC compliant and rated for Hazardous/Classified Locations (Class I, Division 1; Class II, Division 1; Class III). It also carries NEMA ratings 3, 4, 7, 9 and UL certifications for hazardous locations, supporting code-compliant installations in industrial facilities.
Commonly used in 480 Vac motor control and distribution panels within hazardous environments such as chemical plants or oil and gas facilities. The three-pole configuration provides balanced protection for three-phase systems, while the 1-1/4 inch trade size enables compact integration in space-constrained control cabinets.
The copper-free aluminum enclosure and threaded cover simplify servicing and reduce corrosion-related upkeep, contributing to lower maintenance costs over the service life. The non-interchangeable trip minimizes protection drift, improving reliability and reducing downtime. When paired with UL/CSA documentation, it supports faster commissioning and predictable long-term operation in hazardous locations.
Thermal magnetic protection offers coordinated overload and short-circuit protection, delivering fast response to faults while minimizing nuisance trips. In hazardous-location installations, this helps maintain safety, preserves critical equipment, and supports selective tripping in multi-breaker panels, enhancing overall system reliability and uptime.