Circuit Breakers

Having an effective and well-designed circuit protection system in every building is vital. It not only protects machinery and equipment from costly damage or even worse an electrical fire, but good circuit protection also ensures people are safe too.

Here, at RS we stock an extensive range of high-quality products within our circuit breaker range. They include various types of protection devices as well as consumer units, distribution boards and accessories. Whether you are designing and building a new system or maintaining an old one we have everything you need, providing the perfect end-to-end solution.

What are the different types of circuit breakers?

RCBO Breakers

RCBO stands for Residual Current Circuit Breaker with Over Current protection. Installed in consumer units they protect from short circuits, overload current and residual current as they combine all the functions of an MCB and an RCCB.

RCCB Breakers

RCCB stands for Residual Current Circuit Breaker. They are designed to quickly disconnect any circuit as soon as current leaks to the earthing wire. RCCBs are also effective in protecting from electrocution or shock from direct contact.

MCB Breakers

MCB stands for Miniature Circuit Breaker. They are designed to protect an electric circuit from overcurrent only. They do not safeguard people from electric shock caused by earth leakage.

MCCB Breakers

MCCB stands for Moulded Case Circuit Breaker. They are another type of electrical protection device used in higher current rating applications where an MCB would not suffice. An MCCB protects against overload and short circuit faults. With its high breaking capacity and a wider range of current ratings, MCCBs are typically found in industrial systems rather than domestic systems.

Busbar Feed & Tap-Off Units
Busbar Feed & Tap-Off Units
Busbar Trunking
Busbar Trunking
Busbar Trunking Accessories
Busbar Trunking Accessories
Busbars
Busbars
Circuit Breaker Accessories
Circuit Breaker Accessories
Circuit Trips
Circuit Trips
Consumer Units
Consumer Units
Distribution Boards
Distribution Boards
Electronic Circuit Breakers
Electronic Circuit Breakers
Energy Monitoring Devices
Energy Monitoring Devices
MCBs
MCBs
MCCBs
MCCBs
RCBOs
RCBOs
RCCBs
RCCBs
Surge Protection Devices
Surge Protection Devices
Thermal Breakers
Thermal Breakers

35874 Products showing for Circuit Breakers

136 of 999+
In Stock
Siemens SIRIUS Extension Connector for use with Connecting 3-Phase Busbars
  • RS Stock No. 203-3860
  • Mfr. Part No. 3RV2917-5BA00
Each
TWD519.00(exc. GST)
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-291
  • Mfr. Part No. KV PC 9104
Each
TWD2,076.00(exc. GST)
In Stock
Murrelektronik Limited Electronic Circuit Breaker
  • RS Stock No. 123-6692
  • Mfr. Part No. 9000-41042-0100400
Each
TWD4,728.00(exc. GST)
In Stock
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 10mA Trip Sensitivity, Type B, Resi9 Range
  • RS Stock No. 212-138
  • Mfr. Part No. R9D03616
Each
TWD5,539.00(exc. GST)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 6A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1290
  • Mfr. Part No. 5SY4206-8
Each
TWD3,920.00(exc. GST)
In Stock
Phoenix Contact Electronic Circuit breaker 1A 24V PTCB, DIN Rail Mount Type E
  • RS Stock No. 201-6326
  • Mfr. Part No. 2909902
Each
TWD1,442.00(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY5 MCB, 4P, 40A Curve B, 400V AC, 880V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-332
  • Mfr. Part No. 5SY5440-6
Each
TWD12,483.00(exc. GST)
In Stock
Better World
Siemens SENTRON 5SY4 MCB, 1P, 8A Curve D, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8824
  • Mfr. Part No. 5SY4108-8
Each
TWD2,485.00(exc. GST)
Temporarily out of stock
Eaton Electronic Circuit breaker
  • RS Stock No. 774-0162
  • Mfr. Part No. 121725 PKE-XTU-12
Each
TWD3,995.00(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 1P, 32A Curve B, 400V AC, 72V DC
  • RS Stock No. 209-7434
  • Mfr. Part No. 5SL4132-6
Each
TWD804.00(exc. GST)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 50A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 255-371
  • Mfr. Part No. 265743 NZMH2-S50
Each
TWD18,314.00(exc. GST)
In Stock
Eaton Electronic Circuit breaker
  • RS Stock No. 774-0180
  • Mfr. Part No. 121730 PKE-XTUA-32
Each
TWD6,025.00(exc. GST)
In Stock
Eaton Eaton Moeller NZM Door Coupling Handle for use with N4, NZM4
  • RS Stock No. 257-006
  • Mfr. Part No. 271448 NZM4-XTVD-NA
Each
TWD10,958.00(exc. GST)
In Stock
ETA ESX10 Electronic Circuit breaker 2A 24V ESX10-T, 1 channels , Plug-In Mounting
  • RS Stock No. 210-2124
  • Mfr. Part No. ESX10-TA-100-DC24V-2A-E
Each
TWD4,431.00(exc. GST)
In Stock
Phoenix Contact TRABTECH Electronic Circuit breaker 2A 24V CB E1, On Base Element
  • RS Stock No. 768-1101
  • Mfr. Part No. 2800916
Each
TWD1,461.00(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4562
  • Mfr. Part No. 3VA2125-7HN42-0AA0
Each
TWD45,982.00(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 1P, 20A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 191-6122
  • Mfr. Part No. A9P34620
Each
TWD3,831.00(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 8340 Single Pole 80V dc Voltage Rating Flange Mount, 10A Current Rating
  • RS Stock No. 273-4632
  • Mfr. Part No. 8340-F410-P1M1-A3H0-10A
Each
TWD2,807.00(exc. GST)
Temporarily out of stock
Better World
ABB, XT2L MCCB 4P 125A, Fixed Mount
  • RS Stock No. 236-7418
  • Mfr. Part No. 1SDA067668R1 XT2L 160 TMA 125A 3P+N FF
Each
TWD31,496.00(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 1616 Single Pole 32V Voltage Rating, 30A Current Rating
  • RS Stock No. 729-2748
  • Mfr. Part No. 1616-21-30A
Each
TWD478.00(exc. GST)
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