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Used frames in China

Trusted Seller
140G-N6K3-E12 | Circuit Breaker
- Manufacturer: Allen-Bradle
140G-N6K3-E12 Circuit Breaker 140G-N6K3-E12 Circuit Breaker The 140G-N6K3-E12 Molded Case Circuit Breaker has a N Frame and 1200 Amps. It also has a 60 kA Interrupting Rating and 3 Poles.
Fujian, China
NCM3-800DC 1500V Molded Circuit Breaker
NCM3 series Molded Circuit Breaker Through many years of dedicated research on the actual system operation situation and customer needs of new energy at home and abroad, Shanghai Anson Electric has NCM3 (DC) seri...
Wenzhou, China
NCM3-630DC 1500V Molded Circuit Breaker
NCM3 series Molded Circuit Breaker Through many years of dedicated research on the actual system operation situation and customer needs of new energy at home and abroad, Shanghai Anson Electric has NCM3 (DC) seri...
Wenzhou, China
NCM3-320 1000V/320A Molded Circuit Breaker
NCM3 series Molded Circuit Breaker Through many years of dedicated research on the actual system operation situation and customer needs of new energy at home and abroad, Shanghai Anson Electric has NCM3 (DC) seri...
Wenzhou, China
NCM3-630 1000V/630A Molded Circuit Breaker
NCM3 series Molded Circuit Breaker Through many years of dedicated research on the actual system operation situation and customer needs of new energy at home and abroad, Shanghai Anson Electric has NCM3 (DC) seri...
Wenzhou, China
NCM3-250 1000V/250A Molded Circuit Breaker
NCM3 series Molded Circuit Breaker Through many years of dedicated research on the actual system operation situation and customer needs of new energy at home and abroad, Shanghai Anson Electric has NCM3 (DC) seri...
Wenzhou, China
NCM3-400 1000V/400A Molded Circuit Breaker
NCM3 series Molded Circuit Breaker Through many years of dedicated research on the actual system operation situation and customer needs of new energy at home and abroad, Shanghai Anson Electric has NCM3 (DC) seri...
Wenzhou, China
Trusted Seller
HLDB3600FT33W | EATON Circuit Breaker
- Manufacturer: Eaton
EATON HLDB3600FT33W Circuit Breaker EATON HLDB3600FT33W Circuit Breaker Eaton Series C electronic molded case circuit breaker, L-frame, HLDB, Frame only, Digitrip 310 RMS, Electronic LS trip type, Three-pole, 600...
Fujian, China
Trusted Seller
SRPF250A175 | GE Circuit Breaker Rating Plugs
- Manufacturer: GE
General Electric SRPF250A175 Circuit Breaker Rating Plugs General Electric SRPF250A175 Circuit Breaker Rating Plugs General Electric, Spectra Series, type SRPF, interchangeable rating plug element, rated for 175A...
Fujian, China
Trusted Seller
SRPE60A | GE Circuit Breaker
- Manufacturer: GE
GE SRPE60A Circuit Breaker GE SRPE60A Circuit Breaker 60A SRPE Rating Plug Molded Case 60A SRPE Rating Plug Molded Case Circuit Breaker MCCB General Electric, Spectra Series, type SRPE, interchangeable rating plu...
Fujian, China
Trusted Seller
NZMN4-AE1000 | Eaton CASE CIRCUIT BREAKERS
- Manufacturer: Eaton
Eaton NZMN4-AE1000 CASE CIRCUIT BREAKERS Eaton NZMN4-AE1000 CASE CIRCUIT BREAKERS Eaton Series NZM complete molded case circuit breaker PRODUCT NAME Eaton Series NZM complete molded case circuit breaker CATALOG N...
Fujian, China
NZC630H-4P 400A Molded case circuit breaker
Description: Anson Electric 500A circuit breaker for EasyPact NZC630H. This product can work below rated operational voltage(Ue) 440VAC at 50/60Hz. The ultimate breaking capacity(Icu) is 50kA at 440V, in terms of...
Wenzhou, China
circuit breaker Easypact NZC400H-TMD-400A-3 poles
Description: Anson Electric 400A circuit breaker for EasyPact NZC400H. This product can work below rated operational voltage(Ue) 440VAC at 50/60Hz. The ultimate breaking capacity(Icu) is 50kA at 440V, in terms of...
Wenzhou, China
circuit breaker EasyPact NZC400H-4P-TMD- 400 A-4 poles
Description: Anson Electric 400A circuit breaker for EasyPact NZC400H. This product can work below rated operational voltage(Ue) 440VAC at 50/60Hz. The ultimate breaking capacity(Icu) is 50kA at 440V, in terms of...
Wenzhou, China
circuit breaker EasyPact NZCNZC630H-TMD- 500 A-3 poles
Description: Anson Electric 500A circuit breaker for EasyPact NZC630H. This product can work below rated operational voltage(Ue) 440VAC at 50/60Hz. The ultimate breaking capacity(Icu) is 50kA at 440V, in terms of...
Wenzhou, China

Overview

Molded case circuit breakers (MCCBs) are low-voltage protection devices that interrupt overloads and short circuits. They combine a molded insulating case with adjustable thermal-magnetic or electronic trip units, offering broad ampere ranges and high interrupting capacity. MCCBs are used in industrial panels, motor control and building distribution where precise trip settings and fault tolerance are required. Selection depends on frame size, trip type, voltage rating and interrupting capacity (kA).

FAQ

What should I consider when buying a used MCCB?

Check ampere rating, interrupting capacity (kA), trip unit type (thermal‑magnetic or electronic), frame vs. trip rating, physical condition, signs of overheating or corrosion, service history, and compatibility with your panel bus and standards.

How do I ensure an MCCB is shipped safely?

De‑energize and tag the breaker, protect and cap terminals, pack in a sturdy crate or pallet with moisture protection, immobilize the unit, use a carrier experienced with electrical equipment and insure the shipment.

What is a practical maintenance schedule for an MCCB?

Perform visual inspections monthly/quarterly, clean dust, torque terminals after installation, exercise trip mechanism and perform trip tests annually or per manufacturer, and run insulation/thermal checks yearly.