Eaton EFDC21105 EFD circuit breaker - Hazardous/Classified Locations
Part Number: EFDC21105
Quick Summary
EFDC21105 EFD circuit breaker protects electrical circuits in hazardous locations for industrial control panels. Many engineers struggle to source reliable explosion-proof protection that meets NEC/CEC standards while minimizing downtime. It adheres to NEC/CEC standards with area classifications for Hazardous/Classified Locations and carries NEMA ratings 3, 7, 9, and 12 for versatile enclosures. With through-feed design, bolted/ground joint enclosure, and a compact 3/4 inch trade size, installation is straightforward, and preventive maintenance is simplified by a single-pole, 20 A rating. This combination translates to reduced panel downtime and lower lifecycle costs for plant operators. Designed for oily, dusty, or wet environments, it delivers dependable operation across harsh industrial sites.
Product Information
Extended Description
EFDC21105 Eaton: Eaton Crouse-Hinds series EFD circuit breaker, 20A, Bolted/ground joint cover construction, Feraloy iron alloy, Square D breaker, Single-gang, Single-pole, Through feed, 3/4", 120/240 Vac
Product Name
Eaton Crouse-Hinds series EFD circuit breaker
Catalog Number
EFDC21105
UPC
782274033891
Product Length/Depth
3.5 in
Product Height
7.13 in
Product Width
5 in
Product Weight
7.47 lb
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class I, Division 2 Class II, Division 2 Class III Class II, Division 1
NEMA Rating
3 7 9 12
Enclosure
With circuit breaker
Number of gangs
Single-gang
Style
Through feed
Amperage Rating
20 A
Trade size
3/4"
Manufacturer
Square D
Number of poles
Single-pole
Voltage rating
120/240 Vac
Enclosure cover construction
Bolted/ground joint
Enclosure material
Feraloy iron alloy
EFD and EFDC Series Explosionproof Circuit Breakers catalog page
Eaton Specification Sheet - EFDC21105
Explosionproof construction using Feraloy iron alloy provides superior arc and heat containment in hazardous areas. This rugged enclosure reduces ignition risk and supports compliance for critical process controls in oil and gas, chemical processing, and other hazardous environments. With a 20 A amperage rating and a 120/240 VAC supply, this single-pole breaker delivers precise overcurrent protection for motor starters, control circuits, and lighting in demanding installations. Through-feed design and 3/4" trade size simplify mounting and wiring, cutting install time and reducing panel downtime. Single-gang form factor fits compact control panels, and the bolted/ground joint enclosure ensures a secure, dust-tight connection. This arrangement eases retrofits in existing panels. NEC/CEC compliance with Hazardous/Classified Locations area classification and a NEMA rating of 3, 7, 9, and 12 provides regulatory assurance across offshore, chemical, and mining applications. Manufactured under the Square D label, EFDC21105 aligns with standard Eaton distribution practices, enabling seamless compatibility with many equipment brands and enclosures. Installation remains straightforward in through-feed configurations, with consistent performance and predictable trip characteristics.
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FAQs
EFDC21105 is designed to work with Eaton's EFDC explosionproof line and standard through-feed panel configurations. When integrating with Square D or other brands, verify enclosure ratings and mounting patterns. Use the bolted/ground joint enclosure and 3/4" trade size fittings to ensure a secure, industry-standard installation. Always follow enclosure manufacturer guidelines and local codes for panel compatibility.
EFDC21105 is rated for 20 A and operates at 120/240 VAC. It is a single-pole, through-feed device designed for single-gang enclosures and fits a 3/4" trade size opening. This combination provides reliable overcurrent protection for simple control circuits in hazardous locations.
Yes. EFDC21105 is intended for Hazardous/Classified Locations and supports NEC/CEC compliance with area classifications. It carries a NEMA rating of 3, 7, 9, and 12, enabling safe operation in environments with dust, moisture, flammable vapors, and corrosive atmospheres. Ensure installation follows applicable standards and that the enclosure is properly rated for the specific location.
EFDC21105 meets NEC/CEC standards for hazardous locations and area classifications, including Class I Division 1 and 2, Class II Division 2, and Class III. It also carries NEMA ratings 3, 7, 9, and 12. This combination provides regulatory assurance for installations in oil, gas, mining, and chemical processing facilities.
Routine maintenance centers on verifying connections and inspecting the enclosure for signs of corrosion or damage. The rugged Feraloy iron alloy enclosure resists harsh environments, reducing maintenance frequency. The compact, single-pole design simplifies replacement and spare-parts management, contributing to lower downtime costs and a favorable ROI when deployed across multiple hazardous-location circuits.