Eaton FLB140 WT40 2 Circuit Breaker - Hazardous Locations
Part Number: FLB140 WT40 2
Quick Summary
Eaton FLB140 WT40 2 is a high‑reliability circuit breaker designed to protect industrial power distribution in hazardous locations. Engineers often struggle to find a device that combines robust protection with certified suitability for explosive environments and easy field installation. This model delivers NEC/CEC compliance and hazardous/location ratings, including Class I, Division 1 & 2 and Class II/III, while leveraging a copper-free aluminum enclosure and threaded cover for durable service. By pairing 40 A thermal-magnetic protection with a compact EHD frame, it supports reliable uptime, safer maintenance, and seamless interoperability within Eaton Crouse-Hinds ecosystems for budget-conscious projects and ongoing plant safety programs.
Product Information
Extended Description
FLB140 WT40 2 Eaton: Eaton Crouse-Hinds series FLB circuit breaker, 40A, EHD frame type, Thermal magnetic, Threaded cover construction, Copper-free aluminum, Cutler-Hammer breaker, Two-pole, Non-interchangeable trip, 1", 480 Vac/250 Vdc
Product Name
Eaton Crouse-Hinds series FLB circuit breaker
Catalog Number
FLB140 WT40 2
UPC
782274877167
Product Length/Depth
6.25 in
Product Height
10.25 in
Product Width
7 in
Product Weight
12.73 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
40 A
Circuit breaker type
Thermal magnetic
Voltage rating
480 Vac/250 Vdc
Number of poles
Two-pole
Trade size
1"
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 Canadian certification
FLB Explosionproof Circuit Breakers Canadian certification
IF 1016 - FLB Series Circuit Breakers
Eaton Specification Sheet - FLB140 WT40 2
Feature: Thermal-magnetic two-pole protection provides fast interruption for short circuits while maintaining coordinated overload protection. Business Impact: Reduces arc-flash risk, minimizes downtime, and lowers nuisance trips in demanding environments. Application: Motor feeders and power distribution panels in chemical plants or refineries benefit from reliable control without compromising safety. Feature: 40 A ampere rating with a 1" trade size and 6.25 in depth, 7 in width, 10.25 in height enclosure. Business Impact: Fits standard enclosures and simplifies retrofits, reducing installation time and hardware costs. Application: New builds or panel upgrades in space-constrained installations where maximum protection is required. Feature: EHD frame with threaded enclosure cover and copper-free aluminum enclosure. Business Impact: Enhanced mechanical durability, corrosion resistance, and lighter weight for easier handling during installation and service. Application: Outdoor or humid environments in hazardous locations where material compatibility matters. Feature: 480 Vac/250 Vdc voltage rating and two-pole configuration. Business Impact: Aligns with common industrial feeders and controls, enabling consistent protection across mixed voltage systems. Application: Plant-wide protection in mixed-voltage distributions and critical equipment lines. Feature: NEC/CEC standards with Hazardous/Classified Locations ratings (Class I/II/III). Business Impact: Streamlines compliance audits and reduces the need for multiple protective devices. Application: Industries with stringent regulatory requirements, including oil & gas, chemical, and mining sectors. Feature: Special features include non-interchangeable trip. Business Impact: Ensures consistent protection characteristics and reduces the risk of mismatched trip settings in multi-breaker assemblies. Application: Replacement in legacy Eaton FLB systems or new cabinets where trip integrity is critical.
Get a Quick Quote for a Eaton FLB140 WT40 2
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton FLB140 WT40 2?
Enquire Now
FAQs
Installers should verify enclosure integrity and use the threaded cover to maintain enclosure sealing in classified environments. The device is a two-pole, 40 A unit with a 1" trade size, designed for 480 Vac/250 Vdc. Ensure proper clearance and mounting within NEC/CEC-compliant panels, and verify that wiring practices preserve the copper-free aluminum enclosure’s corrosion resistance.
The thermal element handles gradual overcurrent protection, while the magnetic element provides instantaneous trip for short circuits. This dual-action scheme reduces arc-flash risk, minimizes nuisance trips, and preserves motor health. The 40 A rating suits feeders and distribution circuits, ensuring selective coordination within Eaton FLB families when protecting critical loads.
Yes. The FLB140 WT40 2 uses the same EHD frame and 1" trade size as other FLB units, enabling straightforward retrofits and panel upgrades. Its threaded cover and copper-free aluminum enclosure provide consistent mounting and corrosion resistance, while non-interchangeable trip maintains uniform protection characteristics across the series.
The FLB140 WT40 2 carries NEC/CEC standards with Hazardous/Classified Locations ratings, including Class I, Division 1 & 2, Class II, and Class III. It also aligns with NEMA ratings 3, 4, 7, and 9, supporting use in hazardous environments. These certifications simplify compliance for industries like oil & gas, chemicals, and mining.
The non-interchangeable trip feature reduces misconfiguration risk in multi-breaker panels, promoting consistent protection across installations. The copper-free aluminum enclosure offers corrosion resistance with lower weight, easing maintenance and replacements. Combined with robust hazardous-location ratings and NEC/CEC compliance, the FLB140 WT40 2 contributes to lower downtime, fewer service calls, and safer long-term operation.