Sell your Square D circuit breakers.
QO, Homeline, E-frame bolt-ons, F-frames, PowerPact, and Masterpact. Residential singles by the bin or a 1600A drawout by the unit. Medium voltage too: Masterclad Type VR vacuum breakers.
Get an offerSquare D has been part of Schneider Electric since 1991, and the labels show it: older units say Square D, newer ones say Square D by Schneider Electric, and the newest air circuit breakers carry only the Schneider name. Same families, same catalog logic.
It is the most common breaker brand we see by a wide margin, because Square D owns two of the biggest residential lines (QO and Homeline) and the I-Line panelboards that sit in a large share of American commercial buildings.
Square D molded case catalog numbers read series, then poles, then a voltage digit, then amps. The voltage digit is 2 for 240V, 4 for 480V, and 6 for 600V. EDB34060 is an E-frame, 3-pole, 480V, 60A. HJA36150 is an H-frame, 3-pole, 600V, 150A. Residential QO and Homeline skip the voltage digit: QO120 is 1-pole, 20A.
On PowerPact frames the second letter is the interrupting class, climbing D, G, J, L, R. On the older F, K, and L frames it climbs A, H, C. Higher class units can replace lower ones in the same frame; the reverse is an engineering call.
Square D prints the catalog number on the face label. On PowerPact and Micrologic units, add a photo of the trip unit.
12 Square D breaker families, from residential singles to air breakers.
Square D QO and QOB
Plug-on and bolt-on miniature breakers · 10 to 150A · 120/240V
Square D Homeline
Plug-on residential breakers · 15 to 125A · 120/240V
Square D E-frame bolt-on
Bolt-on molded case breakers · 15 to 125A · 480Y/277V (277V on 1-pole)
Square D F-frame
Molded case breakers, I-Line and unit mount · 15 to 100A · 240, 480, 600V
Square D KA, LA, MA, and Q2 frames
Legacy molded case feeder breakers · 70 to 1000A · 240, 480, 600V
Square D PowerPact B-frame
Compact molded case breakers · 15 to 125A · Up to 600V class
Square D PowerPact H-frame
Molded case breakers · 15 to 150A · Up to 600V
Square D PowerPact J-frame
Molded case feeder breakers · 150 to 250A · Up to 600V
Square D PowerPact Q-frame
240V molded case breakers · 70 to 250A · 240V
Square D PowerPact L, M, and P frames
Large molded case breakers · 250 to 1200A · Up to 600V
Square D Masterpact NT, NW, and MTZ air circuit breakers
Low voltage power and air circuit breakers · 800 to 6000A class · Up to 600V
Square D Masterclad Type VR vacuum breakers
Medium voltage vacuum circuit breakers · 1200, 2000, and 3000A · 5 to 15kV
Yes. Square D has been part of Schneider Electric since 1991, and the labels show it: older units say Square D, newer ones say Square D by Schneider Electric, and the newest air circuit breakers carry only the Schneider name. Same families, same catalog logic.
Yes. Residential singles buy by the bin, panel takeouts by the box, and feeder or air breakers by the unit. Photograph the labels or send a list with counts.
Square D molded case catalog numbers read series, then poles, then a voltage digit, then amps. The voltage digit is 2 for 240V, 4 for 480V, and 6 for 600V. EDB34060 is an E-frame, 3-pole, 480V, 60A. HJA36150 is an H-frame, 3-pole, 600V, 150A. Residential QO and Homeline skip the voltage digit: QO120 is 1-pole, 20A.