ATS48C21Y Schneider Electric

Original price was: $4,081.00.Current price is: $3,139.00.

1 in stock



Range of product Altistart 48.
Product or component type Soft starter.
Product destination Asynchronous motors.
Product specific application Heavy duty industry and pumps.
device short name ATS48.
Utilisation category AC-53A.
Ue power supply voltage 208…690 V – 15…10 %.
power supply frequency 50…60 Hz – 5…5 %.
Motor power kW 110 kW at 400 V for standard applications.
110 kW at 440 V for standard applications.
110 kW at 500 V for severe applications.
110 kW at 525 V for severe applications.
132 kW at 500 V for standard applications.
132 kW at 525 V for standard applications.
132 kW at 660 V for severe applications.
160 kW at 660 V for standard applications.
160 kW at 690 V for severe applications.
200 kW at 690 V for standard applications.
45 kW at 230 V for severe applications.
55 kW at 230 V for standard applications.
90 kW at 400 V for severe applications.
90 kW at 440 V for severe applications.
Motor power hp 125 hp at 460 V for severe applications.
150 hp at 460 V for standard applications.
150 hp at 575 V for severe applications.
200 hp at 575 V for standard applications.
50 hp at 208 V for severe applications.
60 hp at 208 V for standard applications.
60 hp at 230 V for severe applications.
75 hp at 230 V for standard applications.
device connection In the motor supply line.
Protection type Phase failure: line.
Thermal protection: motor.
Thermal protection: starter.
Standards EN/IEC 60947-4-2.
product certifications DNV
NOM 117
Marking CE
Discrete input number 5
Discrete input type PTC, 750 Ohm at 25 °C.
(Stop, Run, LI3, LI4) logic, <= 8 mA, 4300 Ohm.
Discrete input logic Positive logic Stop, Run, LI3, LI4 at State 0: < 5 V and <= 2 mA at State 1: > 11 V, >= 5 mA.
Minimum switching current 10 mA at 6 V DC for relay outputs.
Discrete output number 2
Discrete output type (LO1) logic output 0 V is common configurable.
(LO2) logic output 0 V is common configurable.
(R1) relay outputs fault relay NO.
(R2) relay outputs the end of starting relay NO.
(R3) relay outputs motor-powered NO.
Analogue output type Current output AO: 0-20 mA or 4-20 mA, impedance <500 Ohm.
communication port protocol Modbus.
connector type 1 RJ45
Communication data link Serial
Physical interface RS485 multidrop.
Transmission rate 4800, 9600, or 19200 bps.
function available External bypass (optional).
Operating position Vertical +/- 10 degrees.
Height 380 mm.
Width 320 mm.
Depth 265 mm.
Net weight 18.2 kg.
Electromagnetic compatibility Conducted and radiated emissions at level A, conforming to IEC 60947-4-2.
Damped oscillating waves level 3 conforms to IEC 61000-4-12.
Electrostatic discharge level 3 conforms to IEC 61000-4-2.
Immunity to electrical transients, level 4, conforms to IEC 61000-4-4.
Immunity to radiated radio-electrical interference level 3 conforms to IEC 61000-4-3.
Voltage/current impulse level 3 conforms to IEC 61000-4-5.
Relative humidity 0…95 % without condensation or dripping water conforming to EN/IEC 60068-2-3
Ambient air temperature for operation 40…60 °C (with current derating of 2 % per °C)
-10…40 °C (without derating).
Ambient air temperature for storage -25…70 °C.
Operating altitude <= 1000 m without derating.
> 1000…2000 m with current derating of 2.2 % per additional 100 m
Packing Units
Unit Type of Package 1 PCE
Number of Units in Package 1 1
Package 1 Height 43.000 cm.
Package 1 Width 46.000 cm.
Package 1 Length 51.000 cm.
Package 1 Weight 23.000 kg

The Schneider Electric ATS48C21Y is part of the Altistart 48 series of soft starters designed to control and protect three-phase squirrel cage asynchronous motors. Soft starters like the ATS48C21Y are used to reduce the load and torque in the powertrain and electric current surge of the motor during start-up. This results in a smoother start, minimizing mechanical stress on the motor and extending its lifespan. Here is a detailed explanation of the ATS48C21Y:

Key Features

  1. Soft Starting and Stopping: The ATS48C21Y provides soft starting and stopping of motors, reducing mechanical shocks and electrical stress. This is particularly useful in applications where smooth operation is crucial.
  2. Current Limiting: This feature ensures that the motor does not draw excessive current during startup, which helps in protecting the electrical network and reducing the demand charges from utilities.
  3. Thermal Protection: The soft starter includes built-in thermal protection for the motor. It monitors the temperature and can stop the motor to prevent overheating, thereby safeguarding the motor and ensuring longer operational life.
  4. Torque Control: It offers precise control over the motor torque during acceleration and deceleration, enhancing performance and minimizing wear on mechanical components.
  5. BYPASS Function: The integrated bypass function helps in minimizing heat dissipation and energy losses when the motor reaches full speed. This function ensures that the soft starter is not in the power circuit during normal operation, reducing operational costs.
  6. Communication Capabilities: The ATS48C21Y is compatible with various communication protocols, such as Modbus, making it easier to integrate into modern automation systems and providing enhanced monitoring and control.


  • Motor Power: Suitable for motors with power ratings up to 21 kW (approximately 30 HP) at 400V.
  • Supply Voltage: 230V to 415V AC, making it compatible with different power systems.
  • Control Voltage: 110V to 230V AC or DC, providing flexibility in control options.
  • Current Rating: Nominal current rating of 48 A.
  • Degree of Protection: IP20, indicating protection against medium-sized foreign bodies and limited protection against water ingress.


The ATS48C21Y is ideal for a wide range of applications, including:

  1. Pumps: Reducing water hammer and extending the lifespan of pump systems.
  2. Fans and Blowers: Ensuring smooth start-ups and reducing mechanical stress.
  3. Conveyors: Providing smooth operation and reducing wear and tear.
  4. Compressors: Preventing electrical and mechanical stress during startup.

Installation and Setup

The ATS48C21Y is designed for easy installation and setup. It comes with user-friendly interfaces, and its compact size allows for easy integration into existing panels. The unit includes an LCD display for monitoring and configuration, making it straightforward to set operational parameters and monitor performance.


  • Energy Savings: By reducing the inrush current and mechanical stresses, the ATS48C21Y contributes to overall energy savings and reduced maintenance costs.
  • Enhanced Motor Life: Soft starting and stopping reduce the mechanical and thermal stress on motors, resulting in longer operational life.
  • Improved System Reliability: By providing precise control over motor performance and protecting against various faults, the ATS48C21Y enhances the reliability and efficiency of motor-driven systems.


The Schneider Electric ATS48C21Y is a robust and versatile soft starter, designed to provide smooth motor operation, enhance performance, and protect both the motor and the electrical network. Its advanced features, such as current limiting, thermal protection, and communication capabilities, make it a valuable addition to various industrial applications, ensuring reliable and efficient motor control.