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> Power Products (Electrical) > Surge Suppression Devices > Motor Surge Suppressors
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Motor Surge Suppressors
Motor Surge Suppressors

Motor surge suppressors protect against the damaging effects of line surges. 3-phase RC filter surge suppressors are available for 575 VAC motors up to 7.5 kW (10hp). A varistor suppressor, also suitable for VFD applications, will protect 3-phase, 575 VAC motor loads up to 20 kW (26.8hp).

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Universal Surge Suppressors
Universal Surge Suppressors
Motor Surge Suppressors
Motor Surge Suppressors
Valve Surge Suppressors
Valve Surge Suppressors
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Surge Suppression Devices

Category Selection

  • Universal Surge Suppressors
  • Motor Surge Suppressors
  • Valve Surge Suppressors

Inductive voltage spikes have a polarity that opposes the supply voltage, causing arcs, reducing the life of switching equipment, and making the control system behave unpredictably. Inductive loads generate transient voltages when their coils are de-energized. These transient voltages can be many times greater than the coil voltage, damaging devices in the circuit and causing unreliable operation in neighboring electronics. It is essential to manage these transients with surge suppressors to extend the life of connected components and provide reliable control system operation. Typical transient voltage suppression (TVS) circuits are:

  • Zener diode surge suppressors provide protection by shunting voltage spikes that exceed the breakdown voltage of the diode. They support a wide range of loads but provide no damping below their minimum threshold.
  • Varistor surge suppressors are nonlinear devices that have an electrical resistance which decreases with respect to voltage. They support a wide range of loads and have a very simple construction but have a limited lifespan and provide no damping below their minimum threshold.
  • Resistor-capacitor surge suppressors are low-pass filter circuits that shunt high frequency noise to ground. They provide immediate de-energization of high frequency noise but have a limited lifespan and must be matched to the load.
This link is to a video. Tech Tip: How and Why to Use a Surge Protection with Your Contactor
This link is to a video. Tech Tip: How and When to Use the Different Types of Surge Suppression Devices

For part listings and specifications, go to Shop Now

Universal Surge Suppressors

Universal Surge Suppressors

Contactors can produce high voltage spikes when their coils are de-energized. If unsuppressed, these transient voltages can damage PLC outputs, contactor coils, or affect neighboring electronics.

  • Zener (TVS), Varistor (MOV), and RC surge suppressor types
  • For contactor coils up to 250 VAC/VDC

Starting at
$8.75
(26051)

Motor Surge Suppressors

Motor Surge Suppressors

Motor surge suppressors protect against the damaging effects of line surges.

  • 3-phase RC filter surge suppressors for motors up to 7.5 kW (10hp) at 575 VAC
  • Varistor suppressor, also suitable for VFD applications, protects 3-phase motor loads up to 20 kW (26.8hp) at 575 VAC

Starting at
$28.50
(23050)

Valve Surge Suppressors

Valve Surge Suppressors

Valve surge suppressors mount between the valve base and valve plug to protect against damage caused by voltage spikes from solenoid coils.

  • 8/9.4mm Form C, 10/11mm Form B, and 18mm Form A plug sizes
  • Voltage ratings up to 132 VAC/VDC
  • Zener, RC, and varistor types

Starting at
$11.00
(3124033)


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