1. Home / 
  2. All Categories / 
  3. Circuit Breaker / 
  4. Insulated Case Circuit Breaker

Insulated Case Circuit Breaker

For circuit breaker applications in commercial and industrial power distribution systems, insulated case circuit breakers are among the most critical components for reliable overcurrent protection and system safety. Insulated case circuit breakers provide adjustable trip settings and high interrupting capacity while offering compact installation in panelboards and switchboards. Electrical.com carries an extensive selection of insulated case circuit breakers from all major manufacturers, including new, used, surplus, and re-certified options. These components are designed to meet the diverse needs of commercial buildings, industrial facilities, data centers, and healthcare infrastructure applications.
SORT BY
Part Number
PRICE
Manufacturer
Amperage
WLL1F320QJ
WLL1F320QJ
Limited Stock
From
Get Price
Siemens
2000
WLL1F320QK
WLL1F320QK
Limited Stock
From
Get Price
Siemens
2000
WLL1F320QL
WLL1F320QL
Limited Stock
From
Get Price
Siemens
2000
WLL1F320QN
WLL1F320QN
Limited Stock
From
Get Price
Siemens
2000
WLL1F320QP
WLL1F320QP
Limited Stock
From
Get Price
Siemens
2000
WLL1F320QQ
WLL1F320QQ
Limited Stock
From
Get Price
Siemens
2000
WLL1F320QR
WLL1F320QR
Limited Stock
From
Get Price
Siemens
2000
WLL1F320QT
WLL1F320QT
Limited Stock
From
Get Price
Siemens
2000
WLL1F320QU
WLL1F320QU
Limited Stock
From
Get Price
Siemens
2000
WLL1F320QW
WLL1F320QW
Limited Stock
From
Get Price
Siemens
2000
WLL1F320QY
WLL1F320QY
Limited Stock
From
Get Price
Siemens
2000
WLL1F320R
WLL1F320R
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RA
WLL1F320RA
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RB
WLL1F320RB
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RC
WLL1F320RC
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RD
WLL1F320RD
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RE
WLL1F320RE
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RF
WLL1F320RF
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RG
WLL1F320RG
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RH
WLL1F320RH
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RJ
WLL1F320RJ
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RK
WLL1F320RK
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RL
WLL1F320RL
Limited Stock
From
Get Price
Siemens
2000
WLL1F320RN
WLL1F320RN
Limited Stock
From
Get Price
Siemens
2000

Electrical.com stocks the largest inventory of insulated case circuit breakers in the world, with over 1 million square feet of new, used, surplus, and re-certified circuit breakers available for immediate shipment. From low voltage to medium voltage applications, we have the insulated case breakers you need when others say no. Our comprehensive insulated case circuit breaker inventory spans all amperage ratings, voltage classes, and frame sizes from all major manufacturers including current production and discontinued models from legacy suppliers. Available in new factory condition, surplus stock, and re-certified options‚ All backed by our standard 2-year Electrical.com warranty. Our insulated case circuit breakers serve critical applications across industrial power distribution systems, manufacturing facilities, commercial buildings, data centers, utility substations, process control installations, and heavy industrial equipment.


Whether you're maintaining legacy electrical systems with obsolete insulated case breaker models or sourcing current production breakers for new installations and upgrades, our 40+ warehouse locations across the US and Canada ensure rapid delivery to minimize your downtime. Need insulated case circuit breakers now? Call 877-999-7077 or email [email protected]. With same-day shipping available and the right parts ready to ship from our nearest warehouse location, Electrical.com gets your operations back online fast. We can say yes when others have to say no.