How to Select and Size a Soft Starter for a Motor
How to size a soft starter correctly by full-load current, IEC 60947-4-2 duty class, starting torque against the load, control method, wiring topology and...
Schneider Electric ATS430C59S6 Altivar ATS430 soft starter, 590A, 208-600V AC, up to 400kW.
The Schneider Electric ATS430C59S6 is a 3-phase Altivar Soft Starter ATS430 rated for 590A continuous operation on a 208-600V AC supply. It drives asynchronous motors up to 400kW depending on line voltage, using torque control with 99.5% efficiency and an internal bypass to limit heat dissipation once the motor is running at speed.
The 590A rating sizes the ATS430C59S6 for motors from 160kW at 230V up to 400kW at 500-525V, so match the drive to the actual line voltage rather than the current figure alone. The 400% Ie for 13s overload rating and internal bypass keep dissipation low once the motor reaches full speed, which matters most on frequent-cycling loads such as pumps, fans, compressors, conveyors, and mixers. Pick the next size up in the ATS430 range when the driven load's starting torque or duty cycle exceeds the 590A frame's 13-second overload window; pick the size below it when the motor's full-load current sits well under 590A, since an oversized starter loses current-limiting resolution.
| Range of Product | Altivar Soft Starter ATS430 |
|---|---|
| Product or Component Type | Soft starter |
| Product destination | Asynchronous motors |
| Product Specific Application | Standard industrial machines |
| Device short name | ATS430 |
| Phase | 3 phase |
| Utilisation category | AC-3A, AC-53A |
| Ue power supply voltage | 208...600 V AC - 15...10 %) |
| power supply frequency | 50...60 Hz - 20...20 % |
| [Ie] rated operational current | Normal duty 590 A in line 104 °F (40 °C)) |
| Service factor at Ie | 100 |
| Torque control | True |
| IP Degree of Protection | IP00 |
| Motor power kW | 160 kW 230 V in line normal duty, 315 kW 400 V in line normal duty, 355 kW 440 V in line normal duty, 400 kW 500 V in line normal duty, 400 kW 525 V in line normal duty |
| Maximum Horse Power Rating | 200 hp 230 V normal duty, 400 hp 460 V normal duty, 500 hp 575 V normal duty |
| Communication Port Protocol | Modbus serial |
| Device connection | In line |
|---|---|
| Overload current | 400 % Ie for 13 s |
| On-load factor | 50 % |
| Operating cycles/hour | 10 cyc/h |
| [Us] control circuit voltage | 110...230 V AC 50-60 Hz - 15...10 % |
| Apparent power | 70 VA |
| Integrated motor overload protection | True |
| motor thermal protection class | Class 10E |
| Protection type | Phase failure mains, Thermal protection mains, Thermal protection starter, Current overload motor, Motor underload motor, Excessive acceleration time motor, Motor phase loss detection motor, Protection against line phase inversion mains, External thermal protection motor, Short-circuit between motor phase and earth motor |
| current limiting %In (5 x Ie maximum) | 150…700 % |
| [In] Rated current pwr loss specifctn | 590 A |
| Power loss static current independent | 19 W |
| Power loss per device current dependent | 122 W |
| Power loss during starting | 5655 W during starting at 40 °C at 400% In |
| Standards | EN/IEC 60947-4-2, UL 60947-4-2, IEC 60664-1 |
| Product Certifications | cULus, CE, UKCA, CCC, RCM, EAC, KC |
| Marking | CULus, CE, UKCA, CCC, RCM, EAC, KC |
| [Uc] control circuit voltage | 24 V DC |
| Discrete input number | 4 |
| Discrete input type | STOP) digital input, 4.4 kOhm, RUN) digital input, 4.4 kOhm, DI3) digital input, 4.4 kOhm, DI4) digital input, 4.4 kOhm |
| Input compatibility | STOP digital input level 1 PLC EN/IEC 61131-2, RUN digital input level 1 PLC EN/IEC 61131-2, DI3 digital input level 1 PLC EN/IEC 61131-2, DI4 digital input level 1 PLC EN/IEC 61131-2 |
| Discrete input logic | Digital input STOP 0... 11 V, >= 5 mA, Digital input RUN 0... 11 V, >= 5 mA, Digital input DI3 0... 11 V, >= 5 mA, Digital input DI4 0... 11 V, >= 5 mA |
| Relay output number | 2 |
| Relay output type | Relay outputs R1A, R1C NO, Relay outputs R1B, R1C NC, Relay outputs R2A, R2C NO |
| Minimum switching current | 100 mA 12 V DC relay outputs |
| Maximum switching current | Relay outputs 2 A / 250 V AC for AC-15 100000 cycles following IEC 60947-5-1, Relay outputs 2 A / 30 V DC for DC-13 150000 cycles following IEC 60947-5-1 |
| Analogue input number | 1 |
| Analogue input type | PTC1 : PTC temperature probe, PTC2 : PTC temperature probe |
| Analogue output number | 1 |
| Analogue output type | Current output AQ1 : 0...20 mA/4...20 mA , impedance< 500 Ohm, Voltage output AQ1 : 0...10 V , impedance> 470 Ohm |
| Communication port protocol | Modbus serial RJ45, Modbus serial open style (DO, D1, PE, COM) |
| Connector Type | 1 RJ45, Open style |
| Physical interface | 2-wire RS 485 RJ45, 2-wire RS 485 open style (DO, D1, PE, COM) |
| Transmission frame | RTU : 1 RJ45, RTU : open style (DO, D1, PE, COM) |
| Transmission rate | 4.8…38.4 kbps for Modbus serial RJ45, 0.3...115.2 kbps for Modbus serial open style (DO, D1, PE, COM) |
| Data format | 8 bits, odd, even or no parity, 1 or 2 bits to stop for Modbus serial RJ45, 8 bits, configurable odd, even or no parity for Modbus serial open style (DO, D1, PE, COM) |
| Number of addresses | 0…247 Modbus serial |
| Method of access | Slave Modbus serial |
| Type of polarization | No impedance Modbus serial |
| Display screen available | True |
| Operating position | Vertical +/- 10 degree |
| Height | 17.9 in (455 mm) |
| Width | 12.0 in (304 mm) |
| Depth | 11.7 in (296.5 mm) |
| Net Weight | 54.01 lb(US) (24.50 kg) |
| internal bypass | True |
| Function Available | Single direction, Pre-heating, Power monitoring, Condition monitoring, User management, Ports and services hardening, Security event logging, Cybersecure firmware update, Small motor test |
| material declaration | True |
| Electromagnetic compatibility | Conducted and radiated emissions level A conforming to IEC 60947-4-2, Electrostatic discharge level 3 conforming to IEC 61000-4-2, Immunity to radiated radio-electrical interference level 3 conforming to IEC 61000-4-3, Immunity to electrical transients level 4 conforming to IEC 61000-4-4, Voltage/current impulse level 3 conforming to IEC 61000-4-5, Damped oscillating waves level 3 conforming to IEC 61000-4-18, Immunity to conducted disturbances radio-frequency level 3 conforming to IEC 61000-4-6 |
|---|---|
| Pollution degree | Level 3 |
| [Uimp] rated impulse withstand voltage | 6 kV |
| [Ui] Rated Insulation Voltage | 600 V |
| Environmental class (during operation) | Class 3C3 according to IEC 60721-3-3, Class 3S3 according to IEC 60721-3-3 |
| Ambient air temperature for operation | -13…104 °F (-25…40 °C) (without derating), 104…140 °F (40…60 °C) (with current derating of 1 % per °C above 40 °C) |
| Ambient Air Temperature for Storage | -40…158 °F (-40…70 °C) |
| Ambient air transport temperature | -40…158 °F (-40…70 °C) |
| Operating altitude | <= 6561.68 ft (2000 m) without derating, > 2000...4800 m with current derating 1 % per 100 m above 2000 m |
| Relative humidity | 5…95 % without condensation or dripping water EN/IEC 60068-2-3 |
| Maximum deflection under vibratory load (during operation) | 1.5 mm at 2...13 Hz |
| Maximum deflection under vibratory load (during storage) | 1.75 mm at 2...9 Hz |
| Maximum deflection under vibratory load (during transport) | 1.75 mm at 2...9 Hz |
| Maximum acceleration under vibrational stress (during operation) | 1 gn at 13…200 Hz |
| Maximum acceleration under vibratory load (during storage) | 1 gn at 9…200 Hz, 1.5 gn at 200…500 Hz |
| Maximum acceleration under vibratory load (during transport) | 1 gn at 9…200 Hz, 1.5 gn at 200…500 Hz |
| Maximum acceleration under shock impact (during operation) | 15 gn at 11 ms |
| Maximum acceleration under shock load (during storage) | 10 gn at 11 ms |
| Maximum acceleration under shock load (during transport) | 10 gn at 11 ms |
| Part number | ATS430C59S6 |
|---|---|
| Type designation | ATS430 |
| Brand | Schneider Electric |
| Condition | New, factory sealed |
| Source | Schneider Electric and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 3606486948743 |
| Warranty (in months) | 18 |
|---|
| Country of origin | CN |
|---|---|
| Shipping weight | 24.5 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 30 Oct 2026
No documents are on file for this part yet.
Ask us for the datasheetThe rated current of ATS430 is 590 A.
The rated operational voltage of ATS430 is 208–600 V AC.
The rated motor power of ATS430 is 315 kW.
The tariff (HS) code on file for ATS430 is 853710.
The EAN (GTIN) of ATS430 is 3606486948743.
ATS430 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
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