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
WLS1D320HL
WLS1D320HL
Limited Stock
From
Get Price
Siemens
2000
WLS1D320HN
WLS1D320HN
Limited Stock
From
Get Price
Siemens
2000
WLS1D320HP
WLS1D320HP
Limited Stock
From
Get Price
Siemens
2000
WLS1D320HQ
WLS1D320HQ
Limited Stock
From
Get Price
Siemens
2000
WLS1D320HR
WLS1D320HR
Limited Stock
From
Get Price
Siemens
2000
WLS1D320HT
WLS1D320HT
Limited Stock
From
Get Price
Siemens
2000
WLS1D320HU
WLS1D320HU
Limited Stock
From
Get Price
Siemens
2000
WLS1D320HW
WLS1D320HW
Limited Stock
From
Get Price
Siemens
2000
WLS1D320HY
WLS1D320HY
Limited Stock
From
Get Price
Siemens
2000
WLS1D320J
WLS1D320J
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JA
WLS1D320JA
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JB
WLS1D320JB
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JC
WLS1D320JC
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JD
WLS1D320JD
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JE
WLS1D320JE
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JF
WLS1D320JF
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JG
WLS1D320JG
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JH
WLS1D320JH
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JJ
WLS1D320JJ
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JK
WLS1D320JK
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JL
WLS1D320JL
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JN
WLS1D320JN
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JP
WLS1D320JP
Limited Stock
From
Get Price
Siemens
2000
WLS1D320JQ
WLS1D320JQ
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.