Browse Store Molded & Insulated Case Circuit Breakers
Manufacturer
- View all
- ABB
- Cutler-Hammer
- Eaton
- Federal Pacific
- FPE
- General Electric
- ITE
- Merlin Gerin
- Schneider Electric
- Siemens
- Square D
- Westinghouse
- 5
- 10
- 15
- 20
- 25
- 30
- 35
- 40
- 45
- 50
- 55
- 60
- 70
- 80
- 90
- 100
- 110
- 120
- 125
- 150
- 170
- 175
- 200
- 225
- 250
- 275
- 300
- 320
- 350
- 400
- 450
- 500
- 550
- 600
- 650
- 700
- 750
- 800
- 800-1200
- 900
- 1000
- 1200
- 1250
- 1400
- 1500
- 1600
- 1800
- 2000
- 2500
- 3000
- 3200
- 4000
- 5000
- AB DE-ION
- E-150
- EntelliGuard
- F225
- I-Line
- J600
- K1200
- Line & Load
- Line & Load PowerPact
- Magnum DS
- Magnum DSX
- Magnum SB
- Masterpact
- Meter Mod III
- Power Break
- Power Break II
- PowerPact
- Q-Line
- Quicklag
- SACE Emax
- SB
- Sentron
- Series C
- Spectra
- Systems Pow-R
- WL Power Breakers
- 3WN
- BAB
- BQ
- BQCH
- BQD
- CED
- CFD
- CHND
- CJD
- CND
- CQD
- EB
- ED
- EDB
- EDC
- EDH
- EF3
- EGB
- EH
- EH3
- EHB
- EHD
- EJB
- FA
- FAL
- FAP
- FB
- FC
- FCL
- FD
- FDA
- FDB
- FDC
- FH
- FHL
- FHP
- FJ
- FXD
- FY
- GHB
- HB
- HDL
- HE3
- HED
- HEF
- HEJ
- HFB
- HFD
- HFJ
- HFXD
- HDA
- HGA
- HGL
- HHED
- HHFD
- HHJD
- HHLD
- HJA
- HJD
- HJL
- HKA
- HKB
- HKD
- HLA
- HLB
- HLC
- HLD
- HLMD
- HLMX
- HM
- HMC
- HMCA
- HMCG
- HMD
- HMDL
- HMDX
- HMX
- HN
- HNC
- HND
- HNXD
- HP3
- HPD6
- HPXD
- HQP
- HR3
- HRD6
- JA
- JB
- JD
- JDA
- JDB
- JDC
- JDL
- JGA
- JGL
- JJA
- JJL
- JXD
- KA
- KAL
- KAP
- KB
- KC
- KCL
- KCP
- KD
- KDC
- KH
- KHL
- KI
- KIL
- KP3
- LA
- LAL
- LAP
- LB
- LBB
- LC
- LCA
- LCL
- LD
- LDC
- LE
- LH
- LHL
- LHP
- LI
- LIL
- LMD
- LMXD
- LX
- LXD
- M
- MA
- MAL
- MC
- MD
- MDL
- MGA
- MGL
- MH
- MHL
- MJA
- MJL
- MP
- MXD
- NA
- NB
- NC
- ND
- NDC
- NE
- NEF
- NEJ
- NEJH
- NFJ
- NJJ
- NJL
- NM
- NP
- NT
- NW
- NXD
- PA
- PAF
- PB
- PC
- PCF
- PCG
- PD6
- PEC
- PGA
- PGL
- PHF
- PJ
- PJA
- PJL
- PXD6
- PXF
- QBA
- QBHW
- QBL
- QC
- QCHW
- QDA
- QDL
- QGA
- QGL
- QJ2
- QJA
- QJH2
- QJL
- QO
- QOB
- QPHW
- RD
- RGH
- RJ
- RK
- SBA
- SBH
- SBS
- SCB
- SE
- SED
- SEF
- SF
- SG
- SGPP
- SHD
- SK
- SPB
- SPCB
- SSD
- TC
- TEB
- TED
- TEY
- TFJ
- TFK
- THC
- THED
- THFK
- THHQB
- THJK
- THKMA
- THQB
- THQD
- THQL
- THQP
- TJD
- TJJ
- TJK
- TKM
- TKMA
- TMQD
- TP
- TPSS
- TPVF
- TRLA
- TQD
- WLF
- WLL
- I - Instantaneous
- LI - Long-Time and Instantaneous
- IG - Instantaneous and Ground
- LIG - Long-Time, Instantaneous, Ground
- LS - Long-Time and Short-Time
- LSI - Long-Time, Short-Time, Instantaneous
- LSIG - Long-Time, Short-Time, Instantaneous, Ground
While our website showcases a large assortment of our products, it does not reflect the complete inventory of products currently available. For real-time availability and to ensure we can meet your specific needs, please contact our sales team at 1-800-328-1842. New products arrive daily and our knowledgeable staff are happy to assist you in locating the exact item(s) you need.
TPSS6612DGBA3 GE Power Break Breaker 1200 Amp 600 VAC
General Electric TPSS6612DGBA3 Power Break Circuit Breaker; 1200 amp, 600 volt AC, 3 pole. With solid state VersaTrip. SN.# V26259A, LSG functions, ground fault, manually operated (M/O), draw-out (D/O), carriage assembly, used tested with report.
SKU: MCCB1094
$3,300.00
SPB100 Cutler-Hammer/Westinghouse Breaker 800 Amp 600 VAC M/O D/O
Cutler-Hammer/Westinghouse SPB 100 circuit breaker; cat.# SPBR38C, 800 amp, 600 amp. With rating plug cat.# RP6S08A060, Digitrip RMS910 cat.#S95LSG (D), LSG functions, ground fault, auxiliary switch cat.# SPBAUXC164, power relay module cat.# SPBAATR, manually operated (M/O), draw-out (D/O), used tested with report.
SKU: MCCB1558
$2,700.00
TPSS3608DG3A3 GE Power Break Breaker 800 Amp 600 VAC M/O
General Electric TPSS3608DG3A3 Power Break Circuit Breaker; 800 amp, 600 volt AC, 3 pole. With solid state Versa Trip, LSG functions, ground fault, manually operated (M/O), used tested with report.
SKU: MCCB1066
$2,100.00
SPB50 Westinghouse Pow-R Breaker 800 Amp 600 VAC M/O D/O
Westinghouse SPB50 Pow-R breaker; 800 amp, 600 volt AC, 3 pole. With 800 amp rating plug cat.#8SPB800, Pow-R trip 7, LSG functions, ground fault, manually operated (M/O), draw-out (D/O), used tested with report.
SKU: MCCB1186
$2,700.00
TCVVF6612 GE Power Break Breaker 1200 Amp 600 VAC
General Electric TCVVF6612 Power Break Circuit Breaker; 1200 amp, 600 volt AC, 3 pole. With Micro Versa Trip cat.# TP9VT20DLGA3, lSG functions, ground fault, used tested with report.
SKU: MCCB1027
$3,000.00
CND312T35W Cutler-Hammer Circuit Breaker
Cutler-Hammer CND312T35W circuit breaker; 1200 amp, 600 volt, three pole, 50 kAIC @ 480 volt AC with LSG. 600, 700, 800, 900, 1000 and 1200 amp trips available, used tested with report.
SKU: CND312T35W
Contact us for pricing:
CHND2800T35W Cutler-Hammer Circuit Breaker
Cutler-Hammer CHND2800T35W circuit breaker; 800 amp, 600 volt, two pole, 65 kAIC @ 480 volt AC with LSG. 400, 450, 500, 600, 700 and 800 amp trips available, used electronically OK.
SKU: CHND2800T35W
Contact us for pricing:
SPB100 Westinghouse Pow-R Breaker 3000 Amp 600 VAC E/O D/O
Westinghouse SPB100 Pow-R breaker; 3000 amp, 600 volt, 3 pole. With 3000 amp rating plug cat.#30SPB3000, Pow-R Trip 7 with LSG functions, ground fault, shunt trip- 120 volt AC, auxiliary switch cat.# SPBAUX306, electrically operated (E/O)- 120 volt AC, spring release- 120 volt AC, draw-out (D/O), used tested with report.
SKU: MCCB1187
$8,100.00
CHND312T35W Cutler-Hammer Circuit Breaker
Cutler-Hammer CHND312T35W circuit breaker; 1200 amp, 600 volt, three pole, 65 kAIC @ 480 volt AC with LSG. 600, 700, 800, 900, 1000 and 1200 amp trips available, used tested with report.
SKU: CHND312T35W
Contact us for pricing:
CHND3800T35W Cutler-Hammer Circuit Breaker
Cutler-Hammer CHND3800T35W circuit breaker; 800 amp, 600 volt, three pole, 65 kAIC @ 480 volt AC with LSG. 400, 450, 500, 600, 700 and 800 amp trips available, used tested with report.
SKU: CHND3800T35W
Contact us for pricing:
CND212T35W Cutler-Hammer Circuit Breaker
Cutler-Hammer CND212T35W circuit breaker; 1200 amp, 600 volt, two pole, 50 kAIC @ 480 volt AC with LSG. 600, 700, 800, 900, 1000 and 1200 amp trips available, used electronically OK.
SKU: CND212T35W
Contact us for pricing:
CND2800T35W Cutler-Hammer Circuit Breaker
Cutler-Hammer CND2800T35W circuit breaker; 800 amp, 600 volt, two pole, 50 kAIC @ 480 volt AC with LSG. 400, 450, 500, 600, 700 and 800 amp trips available, used electronically OK.
SKU: CND2800T35W
Contact us for pricing:
SPB65 Westinghouse Breaker 1600 Amp 600 VAC E/O D/O
Westinghouse SPB 65 circuit breaker; 1600 amp, 600 volt AC, 3 pole. With Pow-R Trip 7, LSIG functions, ground fault, 1600 amp rating plug cat.# 16SPB1600, shunt trip, auxiliary switch, electrical operator, spring release, electrically operated (E/O), draw out (D/O), used tested with report.
SKU: MCCB1768
$2,100.00
SPB100M Cutler-Hammer/Westinghouse Breaker 3000 Amp 600 VAC M/O D/O
Cutler-Hammer/Westinghouse SPB100M breaker; cat.# SPBMR330C, 3000 amp, 600 volt AC, 3 pole. With Digitrip RMS 910 cat.#S95LSG, LSG functions, ground fault, 3000 amp rating plug cat.# RP6S30A300, manually operated (M/O) cat.#SPBEOC120A, spring release- 120 VAC- 2.5 amp- 50/60 HZ, shunt trip- 24 VDC cat.#SPBSTC024D, auxiliary switch cat.# SPBAUXC304, power relay module cat.# SPBAATR, draw-out (D/O), used tested with report.
SKU: MCCB1488
$7,500.00
SPB100M Cutler-Hammer/Westinghouse Breaker 1600 Amp 600 VAC E/O D/O
Cutler-Hammer/Westinghouse SPB100M circuit breaker; cat.# SPBMR316C, 1600 amp, 600 volt AC, 3 pole. With Digitrip RMS 910 cat.#S95LSG, LSG functions, ground fault, 1600 amp rating plug cat.# RP6S16A160, electrically operated (E/O) cat.#SPBEOC120A, spring release- 120 VAC, 2.5 amp, 50/60 HZ. With shunt trip- 24 VDC, cat.#SPBSTC024D, auxiliary switch cat.# SPBAUX164, power relay module cat #SPBAATR, draw-out (D/O), used tested with report.
SKU: MCCB1481
$3,000.00
SPB100M Cutler-Hammer/Westinghouse Breaker 1600 Amp 600 VAC E/O D/O
Cutler-Hammer/Westinghouse SPB100M circuit breaker; cat.# SPBMR316C, 1600 amp, 600 volt AC, 3 pole. With Digitrip RMS 910 cat.#S95LSG, LSG functions, ground fault, 1600 amp rating plug cat.# RP6S16A160, electrically operated (E/O) cat.#SPBEOC120A, spring release- 120 VAC, 2.5 amp, 50/60 HZ. With shunt trip- 24 VDC cat.#SPBSTC024D, auxiliary switch cat.# SPBAUX164, power relay module cat.# SPBAATR, draw-out (D/O), used tested with report.
SKU: MCCB1485
$3,000.00
SPB100M Cutler- Hammer/Westinghouse Breaker 3000 Amp 600 VAC E/O D/O
Cutler- Hammer/Westinghouse SPB100M breaker; cat.# SPBMR330C 3000 amp, 600 Volt AC, 3 pole. With Digitrip RMS 910 cat.# S95LSG, LSG functions, ground fault, 3000 amp rating plug cat.# RP6S30A300, electrically operated (E/O) cat.# SPBEOC120A, auxiliary switch cat.# SPBAUXC304, shunt trip cat.# SPBSTC024D, power relay module cat.# SPBAATR, draw-out (D/O), used tested with report.
SKU: MCCB1611
$8,100.00
SPB100M Cutler-Hammer/Westinghouse Breaker 3000 Amp 600 VAC E/O D/O
Cutler-Hammer/Westinghouse SPB100M breaker; cat.# SPBMR330C, 3000 amp, 600 volt AC, 3 pole. With 3000 amp rating plug cat# RP6S30A300, Digitrip RMS910 cat# S95LSG (D), auxiliary switch cat.# SPBAUXC304, shunt trip cat.# SPBSTC024D, power relay module cat.# SPBAATR, electrically operated (E/O) cat.# SPBEOC120A, spring release, draw-out (D/O), used tested with report.
SKU: MCCB1570
$7,500.00
SPB100 Cutler-Hammer/Westinghouse Breaker 800 Amp 600 VAC M/O D/O
Cutler-Hammer/Westinghouse SPB100 circuit breaker; cat.# SPBR38C, 800 amp, 600 amp, 3 pole. With rating plug cat.# RP6S08A060, Digitrip RMS910 cat.#S95LSG (D), LSG functions, ground fault, auxiliary switch cat.# SPBAUXC164, power relay module cat.# SPBAATR, manually operated (M/O), draw-out (D/O), used tested with report.
SKU: MCCB1556
$2,700.00
SPB100 Cutler-Hammer/Westinghouse Breaker 800 Amp 600 VAC M/O D/O
Cutler-Hammer/Westinghouse SPB100 breaker; cat.# SPBR38C, 800 amp, 600 amp, 3 pole. With rating plug cat.# RP6S08A060, Digitrip RMS 910 cat.#S95LSG (D), LSG functions, ground fault, auxiliary switch cat.# SPBAUXC164, power relay module cat.# SPBAATR, manually operated (M/O), draw-out (D/O), used tested with report.
SKU: MCCB1559
$2,700.00
New, Used, and Tested Molded & Insulated Case Circuit Breakers
EMSCO has been specializing in used and refurbished molded & insulated case circuit breakers for over 72 years.
Why Choose EMSCO for Molded Case or Insulated Case Circuit Breakers?
Want to match and replace your existing breakers? End the hassle of retrofitting your electrical system. Our extensive inventory includes a variety of Molded Case Circuit Breakers (MCCBs) and Insulated Case Circuit Breakers that are designed to seamlessly match and replace your existing breakers by brand, amp rating, voltage, frame size, or model.
New and Refurbished Products in Stock
We understand that budgets and preferences differ, so we give you the option of selecting between new and refurbished MCCBs or Insulated Case Breakers, both of which are readily available in our inventory. Choose brand-new circuit breakers for maximum performance and longevity, or look into our refurbished options, which have been rigorously tested and reconditioned to meet industry standards.
Popular Brands and Common Configurations
Our shelves are stocked with breakers from the most trusted and popular brands in the industry, ensuring you have access to dependable products. You'll find common configurations, such as different frame sizes and voltage ratings, making it simple to find the right circuit protection for your application.
Avoiding Costly Operational Downtime
Downtime can be an expensive situation. Our circuit protection products are designed for high performance and durability. You can avoid costly operational downtime due to electrical failures by using our fully-tested Molded Case or Insulated Case breakers. Our products provide reliable power and superior equipment protection.
Electrical Testing Equipment Certifying Quality and Performance
When it comes to the dependability and safety of your electrical systems, we leave nothing to chance. Our breakers are rigorously tested using current testing equipment to ensure that they meet or exceed industry standards. This ensures that your electrical installations are safe and efficient.
- Overcurrent Protection: We verify that your breakers provide accurate overcurrent protection, guaranteeing the safety of your electrical systems.
- Trip Time: We measure the time it takes for breakers to respond to overcurrent conditions, ensuring it operates within the specified trip time.
- Short-Circuit Withstand Capacity: Our testing evaluates the breaker’s ability to withstand short-circuit currents, preventing damage and maintaining safety.
- Interrupting Capacity: We determine the MCCB's capability to interrupt fault currents, ensuring the utmost protection for your electrical system.
Molded Case Circuit Breaker Specifications
A sample table of ampere ratings, corresponding voltage ratings, and frame sizes for molded case circuit breakers is shown below. Please keep in mind that frame sizes and ratings can differ between manufacturers and models. For precise details on a specific MCCB, always refer to the manufacturer's specifications.
Frame Size | Ampere Rating | Voltage Rating |
|---|---|---|
A | 15A | 120V, 240V |
A | 20A | 120V, 240V |
B | 30A | 120V, 240V, 480V |
| B | 50A | 120V, 240V, 480V |
| C | 60A | 240V, 480V |
| C | 100A | 240V, 480V |
| D | 150A | 240V, 480V, 600V |
| D | 200A | 240V, 480V, 600V |
| E | 250A | 240V, 480V, 600V |
| E | 300A | 240V, 480V, 600V |
| F | 400A | 240V, 480V, 600V |
| F | 600A | 240V, 480V, 600V |
| G | 800A | 240V, 480V, 600V |
| G | 1200A | 240V, 480V, 600V |
| H | 1600A | 240V, 480V, 600V |
This table is a sample representation of frame sizes, ampere ratings, and voltage ratings for Molded Case Circuit Breakers, not an exhaustive list.
Molded case circuit breakers (MCCBs) and insulated case circuit breakers (ICCBs) are two distinct types of circuit protection devices used in electrical systems. Both serve the purpose of interrupting electrical currents in case of faults or overloads, but they differ in construction, application, and performance characteristics. Need Help Now? Call 800-328-1842.
