Schneider Electric ATS22D47Q — Altistart 22 Soft Starter Buying Guide

By Abdullah Zahid
14 min read
Schneider Electric ATS22D47Q Altistart 22 soft starter 47A 230-440V three-phase DIN rail mount motor control

Schneider Electric ATS22D47Q Soft Starter for Asynchronous Motor, Altistart 22, Control 230V, 230 to 440V, 11 to 22kW — Specs, Price & Selection Guide

If you have a motor nameplate in front of you and you are validating whether the Schneider Electric ATS22D47Q is the right soft starter for your application, the answer hinges on two numbers: full-load amperage and supply voltage. The ATS22D47Q is rated at 47A and accepts a three-phase supply from 230V to 440V AC, covering the 11 to 22kW motor range in supply-line configuration and up to 45kW in delta connection. It is a standard mid-range unit from the Altistart 22 family — widely stocked, competitively priced, and straightforward to specify once you have confirmed motor nameplate data.

If you have already confirmed this is the right part, check current pricing and availability for the ATS22D47Q at LeadTime.ca — ships worldwide.

Who Should Buy the ATS22D47Q — and Who Shouldn't

The ATS22D47Q is the right choice if all of the following apply to your application:

  • Your motor full-load current (nameplate FLA) is 47A or less — do not estimate from horsepower, read the nameplate
  • Your three-phase supply voltage falls between 230V and 440V AC at 50 or 60Hz
  • Rated motor power does not exceed 22kW in supply-line configuration, or 45kW in delta-connected mode
  • Your control cabinet has 230V AC control power available — this model does not accept 24V DC without a separate transformer
  • You are mounting to a standard 35mm DIN rail inside a control enclosure
  • You are prepared to specify and install an external thermal overload relay or motor protection circuit breaker — no integrated protection is included

If your motor FLA exceeds 47A or your motor power in supply-line mode exceeds 22kW, the ATS22D47Q is not the correct model — the ATS22D75Q (75A, up to 37kW supply-line) is the correct next step up. For smaller motors, the ATS22D30Q (30A, up to 15kW) may be the more appropriate and cost-effective choice.

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What the ATS22D47Q Does in a Motor Control System

The Schneider Electric ATS22D47Q is a three-phase soft starter designed to reduce inrush current and mechanical shock at the moment an asynchronous AC motor is energized. In direct-on-line starting, a motor can draw six to eight times its full-load current in the first moments of startup — a spike that stresses windings, trips upstream protection devices, and causes visible voltage sags on shared distribution boards. The ATS22D47Q inserts a controlled voltage ramp between the supply line and the motor, progressively increasing voltage over an adjustable ramp period (typically 10 to 30 seconds), allowing the motor to accelerate smoothly to full speed.

The result is reduced peak demand on the electrical supply, less mechanical stress on couplings and driven loads, and extended motor and drivetrain service life. Once the motor reaches operating speed, an optional external bypass contactor can be switched in to carry the full running current, eliminating the heat generated by the soft starter's SCR thyristors during continuous operation. The ATS22D47Q does not regulate speed during running — it is a starting device only. If variable speed during operation is a requirement, a variable frequency drive is the appropriate technology.

One specification that distinguishes this model within the Altistart 22 family is its dual power rating. In supply-line (star-delta) configuration, the ATS22D47Q is rated for 11 to 22kW motors at 400 to 440V. In delta-connected (direct-on-line) mode, the same 47A device can handle motors up to 45kW at the same voltage range — because in delta connection, the soft starter carries only the phase current rather than the full line current. This flexibility allows engineers to standardize on a single SKU across different motor configurations without stocking multiple amperage variants.

Typical System Architecture for an Altistart 22 Soft Starter

The ATS22D47Q sits between the main supply protection device and the motor terminals, functioning as the voltage control element in the starting sequence. Understanding where it fits in the signal and power chain helps avoid wiring and sizing errors at installation.

  • Three-phase supply (230V to 440V AC) feeds into a motor protection circuit breaker or combination starter upstream of the soft starter
  • The ATS22D47Q input terminals (1L1, 1L2, 1L3) receive the three-phase supply after upstream protection
  • Output terminals (2L1, 2L2, 2L3) connect to the motor; external thermal overload relay is wired here if not part of upstream combination starter
  • A separate 230V AC control voltage source connects to the control input terminals — this is not derived from the soft-start output
  • Optional external bypass contactor wired in parallel with the soft starter output; engages after ramp completes to carry running current and reduce internal heat dissipation

Typical Applications: Pumps, Conveyors, HVAC, and More

The 47A, 22kW supply-line rating places the ATS22D47Q squarely in the mid-range of industrial motor control — the segment that covers the majority of pumps, compressors, fans, and conveyors found in food processing plants, water treatment facilities, HVAC systems, and light manufacturing environments. In pump applications, soft starting eliminates water hammer — the pressure surge that occurs when a pump motor starts abruptly and accelerates fluid mass in the piping system. A controlled 10 to 30 second voltage ramp brings the pump impeller up to speed gradually, protecting pipes, valves, and the pump casing itself.

In conveyor and material handling systems, the ATS22D47Q prevents belt jerk and product spillage at startup, which is particularly relevant in food and beverage processing lines where abrupt starts cause packaging damage or product loss. HVAC engineers specify it on centrifugal fan and chiller motor applications to limit the voltage sag that would otherwise affect lighting, sensitive instrumentation, and other loads on the same distribution panel at startup.

The wide 230V to 440V supply voltage acceptance is a specific advantage for OEM machine builders shipping equipment across multiple markets — the same ATS22D47Q specified for a North American 440V installation can be deployed in European 400V or Asian 380V environments without substituting a different part number, reducing spare parts inventory and simplifying global service logistics.

Application Typical Deployment
Centrifugal pump (water treatment) Supply-line connection, 15-22kW motor, ramp time 15-20s to prevent water hammer
Conveyor belt drive (food processing) Supply-line connection, 11-18kW motor, soft start to prevent belt jerk and product spillage
HVAC centrifugal fan Supply-line or delta connection, up to 45kW delta mode, ramp prevents voltage sag on shared panel
Air compressor (manufacturing) Supply-line connection, 15-22kW motor, reduced inrush on shared electrical supply
OEM machine builder (global shipment) Single SKU for 230-440V markets; delta connection covers up to 45kW without changing part number
Retrofit — replacing failed direct-on-line starter DIN rail mount into existing cabinet; external overload relay retained or upgraded

ATS22D47Q Electrical Specifications and Variant Comparison

Parameter Value Notes
Current Rating (In) 47A Full-load current capacity; verify against motor nameplate FLA
Supply Voltage Range 230V to 440V, 3-phase AC Accepts 50 and 60Hz; covers European, North American, and Asian distribution standards
Control Voltage 230V AC Must be sourced externally; 24V DC not accepted without separate transformer
Rated Motor Power (Supply Line) 11 to 22kW at 400-440V Star-delta configuration; do not exceed 22kW in this mode
Rated Motor Power (Delta) Up to 45kW at 400-440V Direct-on-line delta connection; same device, higher motor capacity
Soft-Start Ramp Time Adjustable (typical 10-30 seconds) Set based on motor inertia and load characteristics
Overload Protection External device required No integrated circuit breaker; thermal overload relay or MCB mandatory
Mounting Type DIN rail (35mm standard) Top-hat profile; cabinet-mount only
Phase Configuration 3-phase AC only Not suitable for single-phase motor applications
Enclosure Rating IP20 Cabinet-mount only; not rated for washdown or outdoor environments

Full technical specifications are available on the product page at LeadTime.ca.

Model / Variant Amperage Max Power (Supply Line) Voltage Range Key Difference
ATS22D30Q 30A 7.5 to 15kW 230-440V Lower amperage for smaller motors; same Altistart 22 family
ATS22D47Q (this model) 47A 11 to 22kW 230-440V Standard mid-range option; covers majority of industrial pump and fan motors
ATS22D75Q 75A 18.5 to 37kW 230-440V Higher amperage for larger motors; step up when FLA exceeds 47A
ABB PSE 30 (competitor) 30A 7.5 to 15kW 380-480V Similar class; narrower voltage range; ABB ecosystem
Siemens SIRIUS 3RW30 (competitor) 30A 7.5 to 15kW 200-480V Competitor offering; higher feature set available in some variants

If your motor FLA exceeds 47A or your supply-line motor power exceeds 22kW, the ATS22D75Q is the correct next step — check current availability and confirm the right variant at LeadTime.ca.

Expert Verdict: Is the ATS22D47Q Right for Your Project?

The ATS22D47Q earns its place as a go-to mid-range soft starter for a specific and well-defined buyer profile: the maintenance technician or plant engineer who needs to replace a failed soft starter on an existing pump, compressor, or fan motor quickly, or the OEM designer who wants a single, broadly compatible SKU that works across 230V to 440V markets without redesigning the motor control cabinet for each region. The 47A current rating covers approximately 70% of the pump, compressor, and fan motors encountered in food processing, water treatment, and light manufacturing — which explains why it is the most commonly stocked Altistart 22 variant at authorized distributors. The power configuration flexibility — 22kW in supply-line mode and up to 45kW in delta connection from the same device — adds genuine procurement value for operations that standardize across multiple motor types.

Where the ATS22D47Q has real limits is equally important to state clearly. It is not the right choice for applications requiring integrated circuit breaker protection — an external thermal overload relay or motor protection circuit breaker is mandatory and must be correctly rated at 110% to 125% of the motor FLA. It is strictly three-phase; single-phase motors require different equipment entirely. Its IP20 enclosure rating makes it unsuitable for washdown, outdoor, or wet environments without additional enclosure protection. And if you need advanced diagnostics, Ethernet communication, or closed-loop control of the starting ramp, the basic ATS22D47Q does not offer these features — you would need to evaluate more advanced soft starter or variable frequency drive options. For motors above 22kW in supply-line mode, the ATS22D75Q is the straightforward alternative.

From a procurement standpoint, the ATS22D47Q is one of the more reliable parts to source in this class. It is carried by major authorized distributors globally, in-stock units typically ship within 3 to 5 business days, and special orders through Schneider Electric direct typically run 4 to 6 weeks. Pricing varies by volume and distributor — current figures are available directly on the product page rather than quoted here, since market pricing shifts. For unscheduled replacements where downtime is costing production, confirming in-stock status before committing to a supplier is the single most important procurement step. View current availability and pricing for the ATS22D47Q at LeadTime.ca — the team ships worldwide and can confirm stock before you commit.

For volume pricing or to verify lead time before locking in a build schedule, contact the LeadTime.ca team directly — we ship worldwide and can source across global authorized distribution networks.

What Engineers Need to Know Before Ordering the ATS22D47Q

Because indexed community forum data for the ATS22D47Q is limited — this is a workhorse industrial component that tends to generate support tickets rather than public forum threads — the most useful guidance comes from the pattern of pre-sales questions that specialist distributors and technical support teams field repeatedly. The following reflects the actual knowledge gaps that cause wrong-part orders, installation delays, and project rework on this model.

The single most common ordering error on this model is amperage misidentification. Engineers who are accustomed to specifying equipment by motor kilowatt rating sometimes cross-reference to an amperage estimate rather than reading the nameplate directly. A 22kW motor at 400V does not always draw exactly 47A — nameplate FLA varies by manufacturer, efficiency class, and frame design. The only reliable method is to locate the motor nameplate and read the FLA value in amps. If that value is 47A or less, the ATS22D47Q is the correct model. If it is 48A or higher, the ATS22D75Q is the minimum correct specification. Submitting a purchase order with motor FLA documented in the order notes is a practical step that prevents returns and delays.

The second area where specialist guidance adds genuine value is external protection device coordination. The ATS22D47Q does not include an integrated circuit breaker, and this surprises buyers who are accustomed to combination motor starters. An external thermal overload relay or motor protection circuit breaker must be selected, rated, and installed — and its amperage setting must be coordinated with the motor FLA at 110% to 125% of nameplate current. Selecting a device rated too high (for example, a 60A relay for a 47A motor) defeats the purpose of overload protection and creates an unsafe condition. Specialist distributors can advise on compatible protection devices during the pre-sales process, a service that generic online channels do not typically provide. The third common issue — connecting 24V DC to control input terminals that require 230V AC — is covered in detail in the checklist below and accounts for a meaningful share of commissioning failures reported through technical support channels.

Wiring and Installation Overview

The following is a high-level installation overview only. Full wiring procedures, terminal diagrams, and parameter settings are documented in the official Schneider Electric ATS22D47Q installation guide and datasheet. All electrical work must comply with applicable codes including NEC and CSA where applicable.

  • Disconnect and verify de-energization of the main three-phase supply before beginning any wiring; use a voltmeter to confirm all phases are dead at the cabinet terminals
  • Connect three-phase supply conductors to input terminals 1L1, 1L2, 1L3; connect motor leads to output terminals 2L1, 2L2, 2L3; verify phase sequence using a phase rotation meter before energizing
  • Connect 230V AC control voltage to the dedicated control input terminals — this supply must be sourced separately and must not be derived from the soft-start output side
  • Install the external thermal overload relay or motor protection circuit breaker in the motor circuit; rate the device at 110% to 125% of motor nameplate FLA and document the selection in the project file
  • Allow a minimum ventilation clearance above the ATS22D47Q for heat dissipation; verify DIN rail space accommodates the unit width and that cabinet layout permits airflow before finalizing mounting position

Wrong-Part Prevention Checklist

Before submitting a purchase order for the ATS22D47Q, verify each of the following against your motor nameplate and cabinet documentation:

  1. Confirm actual motor full-load current (nameplate amps) does not exceed 47A; if it does, specify a higher amperage model
  2. Verify supply voltage is between 230V and 440V three-phase AC; single-phase supplies require different equipment
  3. Check that motor power rating is within 11-22kW in supply line mode (or up to 45kW if delta-connected); oversized motors require larger soft starters
  4. Confirm your control cabinet has 230V AC control power available; if only 24V DC is available, you need a separate power supply
  5. Verify cabinet mounting is DIN rail compatible; surface or wall mounting requires additional hardware
  6. Confirm no requirement for integrated circuit breaker protection; ATS22D47Q requires external overload device (MCB, thermal overload relay, or combination starter)

If any item on this checklist cannot be confirmed, contact the LeadTime.ca team before ordering — we can help verify specifications and identify the correct variant for your application, ships worldwide.

Frequently Asked Questions

My motor nameplate shows horsepower, not kilowatts — can I use that to confirm the ATS22D47Q is correct?

Do not use horsepower as the primary confirmation. Motor nameplate horsepower gives an approximate indication of power, but the full-load amperage (FLA) value — listed in amps directly on the motor nameplate — is the correct figure to compare against the ATS22D47Q's 47A rating. A motor nameplate that reads 25 HP does not reliably translate to 47A because efficiency class, voltage, and frame design all affect actual FLA. Read the nameplate amperage directly.

What is the practical difference between supply-line and delta connection, and how does it change what I can connect to this device?

In supply-line (star-delta) connection, the ATS22D47Q is rated for motors up to 22kW at 400 to 440V because it carries the full line current. In delta connection, the device is wired in series with only one winding of the motor's delta configuration, meaning it carries the phase current rather than the full line current — this allows the same 47A device to soft-start motors up to 45kW. The wiring topology is fundamentally different between the two modes; consult the Schneider Electric installation guide and confirm your motor connection type before wiring.

Does the ATS22D47Q include any internal motor overload or short-circuit protection?

No. The ATS22D47Q does not include an integrated circuit breaker or thermal overload relay. An external protection device — a thermal overload relay, motor protection circuit breaker, or combination starter — is mandatory and must be installed in the motor circuit. This device must be rated at 110% to 125% of the motor nameplate FLA. Omitting external protection is both an electrical code violation and a motor damage risk.

Can I use 24V DC for the control signal instead of 230V AC?

No. The ATS22D47Q requires 230V AC control voltage at the control input terminals. If your control cabinet only has 24V DC available, you must add a separate small step-down transformer to generate a 230V AC control supply. Connecting 24V DC to the control terminals will result in the soft starter being unresponsive with no fault indication — a common commissioning failure that is straightforward to prevent by verifying control voltage before installation.

Is the ATS22D47Q a direct replacement for a failed soft starter from a different manufacturer?

It can be, but a direct mechanical and electrical swap requires verification. Confirm that the replacement cabinet space accommodates 35mm DIN rail mounting, that the supply voltage falls within 230V to 440V three-phase, that the motor FLA does not exceed 47A, and that 230V AC control power is available. Terminal labeling and control wiring will differ between manufacturers, so the wiring diagram in the ATS22D47Q datasheet must be consulted — do not assume terminal-for-terminal compatibility with a different brand's soft starter.

What soft-start ramp time setting should I use for a centrifugal pump versus a conveyor motor?

The ATS22D47Q provides an adjustable ramp time in the typical 10 to 30 second range. Centrifugal pump applications generally benefit from longer ramp times (15 to 30 seconds) to prevent water hammer and pressure surges in the piping system. Conveyor applications with lighter mechanical loads and low inertia can often use shorter ramp times (10 to 15 seconds). The optimal setting depends on the specific motor inertia, load characteristics, and system piping — consult the Schneider Electric application documentation and verify during commissioning with a no-load test run before full production use.

Why Order From LeadTime.ca

  • Global shipping — the ATS22D47Q ships worldwide from LeadTime.ca, not limited to any single country or region
  • Authorized distribution network access — in-stock units typically ship within 3 to 5 business days; special orders tracked through authorized channels
  • Pre-sales specification support — confirm motor FLA, control voltage, and external protection requirements before committing to an order
  • Volume and project pricing available on request — contact directly for multi-unit or OEM quantities
  • Hard-to-find and replacement sourcing — specialist distributors maintain visibility across multiple authorized suppliers when primary stock is constrained

At-a-Glance Summary

  • Model: ATS22D47Q — Altistart 22 family, Schneider Electric
  • Current rating: 47A full-load current capacity
  • Supply voltage: 230V to 440V three-phase AC, 50 or 60Hz
  • Control voltage: 230V AC (external source required; 24V DC not accepted without transformer)
  • Rated motor power in supply-line mode: 11 to 22kW at 400 to 440V
  • Rated motor power in delta-connected mode: up to 45kW at 400 to 440V
  • Soft-start ramp time: adjustable, typical range 10 to 30 seconds
  • Enclosure rating: IP20 — cabinet-mount only; not suitable for washdown or outdoor environments
  • Mounting: standard 35mm DIN rail
  • External protection device: mandatory — thermal overload relay or MCB not included
  • In-stock lead time: typically 3 to 5 business days through authorized distributors
  • Ships worldwide from LeadTime.ca

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