Eaton FLB221 TT20 2 Circuit Breaker - Thermal Magnetic
Part Number: FLB221 TT20 2
Quick Summary
Eaton FLB221 TT20 2 circuit breaker protects electrical circuits in hazardous locations. Engineers often struggle with selecting reliable overcurrent protection that withstands demanding environments while minimizing maintenance. This unit meets NEC/CEC standards and UL certification for hazardous locations, and it carries a broad NEMA rating (3, 4, 7, 9) that supports installation in a range of industrial enclosures. Its rugged construction and precise trip performance translate to fewer nuisance trips and reduced downtime, while the compact 1" trade size simplifies panel design and installation in control cabinets.
Product Information
Extended Description
FLB221 TT20 2 Eaton: Eaton Crouse-Hinds series FLB circuit breaker, 20A, TEB frame type, Thermal magnetic, Threaded cover construction, Copper-free aluminum, General Electric breaker, Two-pole, Non-interchangeable trip, 1", 240 Vac/125-250 Vdc
Product Name
Eaton Crouse-Hinds series FLB circuit breaker
Catalog Number
FLB221 TT20 2
UPC
782274013169
Product Length/Depth
6.25 in
Product Height
10.25 in
Product Width
7 in
Product Weight
1 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
240 Vac/125-250 Vdc
Number of poles
Two-pole
Trade size
1"
Manufacturer
General Electric
Circuit breaker frame type
TEB
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 - FLB221 TT20 2
Feature: Thermal magnetic two-pole design with a 20 A rating and TEB frame. Business Impact: Precise overcurrent protection with predictable trip curves reduces unexpected outages and protects sensitive equipment. Application: Control panels and distribution boards in hazardous locations where reliable protection is critical. Feature: Threaded enclosure cover and copper-free aluminum construction. Business Impact: Easier installation, improved corrosion resistance, and lighter weight for ergonomic servicing. Application: Surface-mounted or backbox installations in industrial plants with limited service space. Feature: Enclosure rated for 240 Vac/125-250 Vdc and 1" trade size. Business Impact: Fits standard wiring practices and enables versatile integration with existing panels, minimizing custom fabrication. Application: OEM and retrofit projects in harsh environments that demand flexible voltage handling. Feature: Non-interchangeable trip and two-pole configuration. Business Impact: Consistent protection characteristics and reduced risk of mismatched replacement parts, lowering lifecycle logistics. Application: Hazardous-location control systems requiring robust, repeatable protection profiles. Feature: NEC/CEC compliance and NEMA ratings (3, 4, 7, 9). Business Impact: Streamlined QA and regulatory approvals, enabling safer installations and faster time-to-operate. Application: Projects across industries with strict electrical safety and enclosure requirements.
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FAQs
For hazardous locations, install the FLB221 TT20 2 in an appropriate enclosure rated for the environment. The unit uses a threaded enclosure cover and copper-free aluminum, weighs about 1 lb, and fits standard 1" trade size spaces. Ensure wiring methods meet NEC/CEC requirements and that the enclosure provides the necessary IP/NEMA protection for the specific location.
This is a two-pole, 20 A circuit breaker with a thermal-magnetic trip. It operates at 240 Vac or 125–250 Vdc and uses a 1" trade size with a TEB frame. The enclosure is supplied with the breaker, and the unit is designed for use in control panels requiring reliable overcurrent protection in industrial settings.
Yes. The FLB221 TT20 2 is rated for hazardous/classified locations and supports NEC/CEC standards. It carries UL hazardous-location certifications and aligns with NEMA ratings 3, 4, 7, and 9, enabling installation in a wide range of explosion-protected and rugged environments.
The thermal-magnetic trip provides fast, predictable responses to overcurrent events while avoiding nuisance trips during short transients. This yields fewer unplanned outages, protects connected equipment, and maintains consistent protection across varying ambient temperatures common in industrial facilities.
Maintenance is typically minimal: verify proper torque on connections, inspect the threaded cover for integrity, and ensure enclosure seals remain intact. The non-interchangeable trip design reduces replacement complexity, while copper-free aluminum construction supports corrosion resistance and lighter weight during servicing in harsh environments.