More than just starting.

CSXi compact soft starters are a comprehensive motor starting and protection solution. These compact, reliable starters provide the latest constant current start technology and robust TVR soft stop, to reduce electrical and mechanical stress on your motor. The CSXi also incorporates essential motor protection functions to safeguard your motor during operation.

Making soft starters simple.

The CSXi soft starter's small size and integrated bypass relays make installation easy, and allow the soft starter to fit in compact enclosures with limited ventilation. Rotary switches simplify configuration, and remote display and communication options allow trouble-free integration into common control networks.


Compact size

The CSXi is a compact and lightweight unit, so it is suitable for installation in small spaces and is the ideal replacement for older starters in existing motor control centres.

Integrated bypass contactors

Integrated bypass contactors simplify installation by reducing the need to select and connect additional equipment. Because the contactors are already contained within the starter, the overall size of the installation is also smaller. Bypassing the starter while the motor is running also reduces the amount of heating, so the starter can usually be installed with no additional ventilation

Essential motor protection

In addition to the benefits of soft start and soft stop, which improve the operating life and efficiency of your equipment, the CSXi also protects your motor and load from damage during operation.

The CSXi models the motor's temperature to prevent against operational overload, and bypass overload protection safeguards the starter from severe spikes in current. The starter also monitors the time taken to start and will trip if the motor cannot start within the allowed time, protecting against stalled loads.

The CSXi also protects against fluctuations in mains frequency and current, as well as incorrect installation.



CSXi soft starters integrate into your existing DeviceNet, Modbus, Profibus or Ethernet network using easy-to-install plug-in communication interfaces. The optional remote operator can be installed to provide remote feedback, including current, temperature and starter status.

Finger Guards

For enhanced personnel safety and protection, AuCom has developed insulating finger guards, which install quickly and easily onto 75 kW ~ 110 kW CSX Series units to provide IP20 protection.

Mains Supply

Mains voltage (L1, L2, L3)  
CSXi-xxx-V4 3 x 200 VAC ~ 440 VAC (+ 10% / - 15%)
CSXi-xxx-V6 3 x 200 VAC ~ 575 VAC (+ 10% / - 15%)
Mains frequency (at start) 45 Hz to 66 Hz
Rated insulation voltage 600 VAC

Form designation

Control Voltage (A1, A2, A3)  
CSXi-xxx-xx-C1 110-240 VAC (+ 10% / - 15%)
  or 380-440 VAC (+ 10% / - 15%)
CSXi-xxx-xx-C2 24 VAC/VDC (± 20%)
Current consumption (during run) < 100 mA
Current consumption (at power-up)  
CSXi-xxx-xx-C1 10A
CSXi-xxx-xx-C2 2 A


Start (terminal 01) Normally Open, 300 VAC max
Stop (terminal 02) Normally Closed, 300 VAC max


Main contactor (terminals 13, 14) Normally Open
  6 A, 30 VDC resistive / 2 A, 400 VAC, AC11
Programmable relay (terminals 23, 24) Normally Open
  6 A, 30 VDC resistive / 2 A, 400 VAC, AC11


Degree of protection CSXi-007 to CSXi-055 IP20
Degree of protection CSXi-075 to CSXi-110 IP00
Operating temperatures - 10 °C to + 60 °C
Humidity 5% to 95% Relative Humidity
Pollution degree Pollution Degree 3
Vibration IEC 60068 Test Fc Sinusoidal
  4 Hz to 13.2 Hz: ± 1 mm displacement
  13.2 Hz to 200 Hz: ± 0.7 g

EMC Emission

Equipment class (EMC) Class A
Conducted radio frequency emission 0.15 MHz to 0.5 MHz: < 90 dB (µV)
  0.5 MHz to 5 MHz: < 76 dB (µV)
  5 MHz to 30 MHz: 80-60 dB (µV)
Radiated radio frequency emission 30 MHz to 230 MHz: < 30 dB (µV/m)
  230 MHz to 1000 MHz: < 37 dB (µV/m)

This product has been designed as Class A equipment. Use of this product in domestic environments may cause radio interference, in which case the user may be required to employ additional mitigation methods.

EMC Immunity

Electrostatic discharge 4 kV contact discharge, 8 kV air discharge
Radio frequency electromagnetic field 0.15 MHz to 0.5 MHz: < 90 dB (µV)
Rated impulse withstand voltage (Fast transients 5/50 ns) 2 kV line to earth, 1 kV line to line
Voltage dip and short time interruption 100 ms (at 40% nominal voltage)
Harmonics and distortion IEC61000-2-4 (Class 3), EN/IEC61800-3

Short Circuit

Rated short-circuit current CSXi-007 to CSXi-037  5 kA
Rated short-circuit current CSXi-045 to CSX-i110 10 kA
Heat Dissipation  
During Start 3 watts / ampere
During Run 10 watts typical


c IEC 60947 4 2
UL / C-UL UL 508
CE IEC 60947 4 2
ccc GB 14048.6
Lloyds IEC 60947 4 2

CSXi Soft Starter Documentation