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SQUARE D

Square D, headquartered in Andover, Massachusetts, USA, is a flagship brand of Schneider Electric, a leading provider of high-quality electrical equipment for both commercial and industrial applications. Since 1902, Square D has been manufacturing electrical equipment, such as electronic protective devices, pressure switches, contactors, circuit breakers and transformers. Read More

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Electrical Filter

SwitchesView all

Starters and ContactorsView all

  • Auxiliary Contacts

    Square D auxiliary contacts are engineered for use with primary switching equipment like circuit breakers, relays and contactors. They are offered in normally open and normally closed designs. These contacts are often used as interlocks or retainers and indicate operation status of a device. They are available in voltage ratings up to 690VAC.

  • Combination Starters

    Square D UL listed combination starters have a NO / NC / no actuator circuit design to secure electric circuits from both overcurrent loads and short circuits. They come equipped with melting alloy overload relays.

  • Contactor Accessories

    Square D contactor accessories include replacement accessories like mounting brackets, pneumatic timers, replacement coils and replacement contact kits, for use with NO and NC contactors.

  • Definite Purpose Magnetic Contactors

    Square D reversible and non reversible relays are designed to offer automatic shut-off during power failures. They are suitable for use with circuits where overload protection is separately offered, and can handle fully inductive loads up to 90A.

  • Drum Switches

    NEMA-rated drum switches featuring manually a manual over-riding facility to reverse the turning direction of motors. Offer different hp ratings at 230, 240 & 460 volts

  • Lighting Magnetic Contactors

    Square D lighting magnetic contactors are suitable for use in stadiums, parks, construction sites and industrial plants for switching electrical power circuits. They provide higher current ratings as compared to relays and are available in 2, 3, 4, 6, 8, 10 & 12 pole configurations.

  • Magnetic Starters with Electronic Overload

    Square D magnetic starters with electronic overload are suitable for use with woodworking machines like shapers and cabinet saws. They provide overload & under-voltage protection, and feature an automatic cut-off facility in case of a power failure.

  • Magnetic Starters with Thermal Overload

    Square D magnetic starters with thermal overload are designed to provide under-voltage and overload protection in sensitive electrical circuits or panelboards. They feature an electromagnetically operated switch for starting the connected motors with a maximum current rating of 27A.

  • Manual Motor Switches and Starters

    Square D manual motor switches and starters are suitable for ON/OFF switching operations in small 1 phase, 3 phase or DC motors installed in pumps, fans, small machine tools and conveyors. They can handle current up to 30A and operating voltage up to 600VAC.

  • Manual Starter Accessory

    Square D manual starter accessories include emergency off actuators, fuse clips & holders, handle guard kits with padlock provision, internal levers, jumper strap kits, motor logic accessories, mounting brackets, reset mechanism w/ external overload and transient suppression modules.

  • Motor Starter Enclosures

    NEMA-rated starter enclosures used with heating loads, transformers, capacitors, electric motors and other powered loads requiring a separate overload protection. Selected models come with a gray finish for a shiny appearance. Offered in heights ranging from 5.51 to 31.5 inches

  • NEMA Magnetic Contactors

    Designed to balance alterations in electrical frequencies and ensure automatic cutoff during power failure conditions

  • Overload Relays

    Facilitate motor overload protection in Type S, NEMA-style magnetic motor starters. Feature an automatic or manual reset function that also offers maximum current adjustment. Available in current ratings ranging between 0.4 & 32A

  • Starter Control Kit

    Includes hand, OFF and auto-selector switches, ON / OFF pushbutton kits and pushbutton control kits. Can be used in conjunction with starters / contactors to maintain the operational status of motors

  • Thermal Units

    Used to protect controllers, motors and branch-circuit conductors from excessive heating and over-current conditions. Capable of tripping the circuit assembly within 20 seconds or less. Available in amperage ratings ranging from 0.3 to 19.2A

DistributionView all

  • Bolt On Miniature Circuit Breakers

    Square D 1, 2 and 3 pole circuit breakers are designed to control voltage levels and protect control panels & devices from overcurrent & short-circuit damage. They are offered in main breaker, standard and high interrupt capacity designs.

  • Bus Plugs

    Square D bus plugs are designed for maximum flexibility, easy installation and high electrical efficiency in low power distribution systems. They allow continuous current flow and feature totally enclosed housing to eliminate accidental busbar contacts.

  • Circuit Breaker Accessories

    Square D circuit breaker accessories such as brackets, handle padlocks & extensions, interlocks, lug kits and shunt trips are designed for use with Square D circuit breakers.

  • Circuit Breaker Enclosures

    Square D NEMA rated steel / stainless steel enclosures are designed to protect users from accidentally contacting energised parts of circuit breakers & molded switch cases. They are capable of handling current flow up to 1000 A.

  • Circuit Protection Devices

    Square D circuit protection devices are thermal-magnetic circuit protectors used to protect electrical circuits from overcurrent. They feature load- and line-side box lugs to provide easy track-mounting.

  • Ground Bar Kit

    Square D ground bar kits are compact and lightweight kits used in CSED devices, load centres and NQOD and NF panel boards. These ANSI certified ground bar kits feature 15 terminals and feed wires to the neutral bar in load centres.

  • IEC Miniature Circuit Breakers

    Square D miniature circuit breakers interrupt the current flow to electrical circuits during a short-circuit or an overload. They come with a DIN rail mounting system equipped with lug terminals to ensure easy attachment to panelboards or load centres.

  • IEC Supplementary Protectors

    Square D D-curve two-pole IEC supplementary protectors trip instantaneously when the current load exceeds ten to 20 times the rating of the device. These breakers comfortably mount on a standard 35 mm DIN rail and are UL 1077 listed to resist damage due to overcurrents and short circuits.

  • Load Center and Panelboard Accessories

    Square D load center and panelboard accessories are employed to customize, mount and enhance the safety of Square D panelboards and load centers. These panelboards and load centers help to distribute electrical power.

  • Load Centers and Panelboards

    Square D load centers and panelboards distribute electrical current in residential, commercial and industrial applications. They use Square D circuit breakers to prevent damage. These circuit breakers interrupt the flow of the current of an overloaded circuit.

  • Molded Case Circuit Breakers
  • Panel Mount Circuit Breakers
  • Plug In Miniature Circuit Breakers
  • Unit Mount Miniature Circuit Breakers

Push ButtonsView all

12

About Square D

Square D manufactures switches, pushbuttons, starters & contactors, relays, fuses and transformers.
Square D single & double pole switches are used to open or close an electrical circuit and are also used as Auto On / Off / Start devices. Limit & interlock switches automatically activate or deactivate power to a device when its travel limits exceed, keeping users & equipment safe from malfunctioning machinery. Liquid level switches on the other hand use a float mechanism to start / stop pumps, open / close valves or activate level alarms by detecting fluid levels. Pressure and vacuum switches are used to track pressure levels & vacuum conditions and control power to hydraulic and pneumatic systems like air compressors & water pumps.
Circuit breakers are designed to control voltage levels and prevent overload conditions in electrical systems. These circuit breakers are available in miniature and moulded case sizes having bolt on or plug in design. The bolt on circuit breakers are used in industrial settings for vibration proof, permanent operations. They can be removed safely only after power to the equipment is switched off. The plug in circuit breaker on the other hand can be removed and replaced easily without disconnecting power from the source. These plug in circuit breakers are cheaper & riskier than bolt on circuit breakers and are used in light commercial applications that do not require permanent installation of the circuit breakers.
Square D panelboards are used to distribute power downstream from main breakers. They protect the housed equipment from rain, dust, snow and other environmental conditions. Load centres are a specialised type of panel board that accept only plug-in circuit breakers having voltage ratings up to 240V for light commercial & industrial usage. Homeline (HOM) Series load centres are used with HOM series circuit breakers and QO Series load centres are used with QO series circuit breakers only.
Choose from a wide range of these circuit breakers and related accessories, such as hook sticks, lever arms, auxiliary contacts and mounting hardware on Raptor Supplies.

Things to Consider

Cross-Reference Alternatives

Square D circuit breakers cross reference with General Electric, Bussmann and Eaton circuit breakers. If you're looking for competitor equipment or a tool that is either out of stock or obsolete, chances are there that Raptor Supplies has the equivalent Square D equipment available.

Shipping

These Square D equipment sizes vary from small to large. They may require careful packaging as some of the tools may get damaged while shipping. Hence, these Square D equipment are delivered by courier shipment and air freight for minimum downtime.

Major Trade Names

QO Series Circuit Breakers

Square D QO Series circuit breakers provide industrial and commercial circuit protection against damage from overload and short-circuit on AC and DC systems. 1, 2 or 3 pole QO Series circuit breakers ...Read more 

Homeline Series Circuit Breakers

Square D Homeline Series circuit breakers provide arc fault, combination arc fault (CAFI), ground fault (Class A, GFCI) and dual function (CAFI and GFCI) protection to 1 / 2 pole electrical equipment....Read more 

Square D Competitive Advantages

Visi-Trip indicator

Square D QO and QOB Series circuit breakers have a Visi-Trip trip indicator to provide a visual indication that the circuit breaker has tripped & interrupted the circuit. When a QO Series circuit breaker trips, its handle assumes a centre position & the Visi-Trip indicator denotes red colour in a window located under the handles in the circuit breaker case. This patented Visi-Trip indicator lights up only when the circuit breaker has tripped for quick identification of the circuit from any other circuits which are merely in the on or off position. For resetting these Square D circuit breakers, push the handle to OFF and then to ON position. Restarting of the circuit turns off the Visi-Trip indicator to denote normal operation.

Time Saver Diagnostics

Square D QO and HomeLine circuit breakers feature Time Saver Diagnostics to provide timely diagnostic assistance with the touch of a button when a circuit trip occurs. This technology helps the contractors and electricians to identify the type & cause of fault that has occurred, providing faster troubleshooting time.

Square D Time Saver Diagnostics is very simple and easy to use. It does not require any tools or special training. Follow these steps for identifying the cause of a fault:

  • Turn off the circuit breaker, continue to hold the TEST button and turn the circuit breaker back on.
  • If the circuit breaker trips immediately (within 1 second), then a ground fault is being detected.
  • If the circuit breaker trips after 2 seconds, then the Time Saver Diagnostics is detecting an arc fault.
  • In case the circuit breaker trips at 5 seconds, it indicates either no fault or thermal overload or a short circuit.

Frequently Asked Questions

Which company owns Square D?

Square D, headquartered in Andover, Massachusetts, USA, is owned by Schneider Electric, a leading electrical equipment manufacturer.

How to select appropriate load centres & circuit breakers?

Following are the major points that users should note while selecting the appropriate load centre or circuit breaker for their applications:

  • Space restriction: Users should choose their circuit breakers based on the space available in the load centre. QO Series circuit breakers are offered generally in 3/4 inch format whereas, the Homeline Series circuit breakers are available in the 1-inch format.
  • Enclosure type required: Rainproof enclosures may be required, depending on the location of application (indoor or outdoor).
  • Electric power supply: Load centres and circuit breakers can be supplied with either single-phase or 3 phase electrical power.
  • Features: Users should select Load centres by taking note of the main circuit breaker, main lugs & generator panel available with them.
  • Ground bar option: Selected ground bars in load centres are factory-installed, whereas some ground bars need to be field installed.
  • Electrical ratings: Users should always check the ampere ratings of the load centres & circuit breakers before purchasing them. They should also take note of the pole spaces and the maximum number of 1-pole, single-phase circuits that a load centre can handle.

What safety instructions should operators follow while using Square D tools?

Users / operators should turn off the power supply before performing any work on any equipment. They should use proper personal protective equipment (PPE) and follow safe electrical work practices, such as appropriately rated voltage sensing devices at all lines. Some Square D equipment and instruments may require periodic cleaning and lubrication.

What standards / certifications do Square D equipment abide by?

Square D equipment can be UL listed or CSA certified while adhering to National Electrical Code (NEC, USA) standards. Square D products are compliant with RoHS, REACh standards as well for minimal use of hazardous substances during manufacturing. Selected Square D equipment are IP & NEMA rated for use in indoor & outdoor applications.

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