Crydom Solid State Relays & Contactors Handout0 pages

Why Use Solid State Switching Technology?
DEC

Long Life Solid state relays and contactors have no moving parts.

Therefore, there is no mechanical wear and tear on the output contact,
ideal for repetitive applications.

What is a Solid State
Relay / Contactor?

Quiet Operation Solid state switching solutions make no
acoustical noise when the output contacts change states. This is highly
desirable in many commercial and medical applications.
Minimum Electrical Noise Zero voltage turn-on and zero
current turn-off allows for minimum electrical disturbances generated by
solid state relays and contactors.
Low Power Consumption Solid state relays and contactors
require very little input power "coil current" to switch large loads.
Shock & Vibration Resistant Solid state switching solutions

are not susceptible to erratic or unreliable operation when operating under
tough environments.

Ideal for Harsh Environments Solid state relays and
contactors do not generate sparks or electric arcs and do not
bounce either electrically or mechanically.

High Compatibility with Control Systems

A Solid State Relay or Contactor (SSR or SSC)
is an electronic component that switches
Power (AC or DC current) to a load circuit and
provides electrical isolation between an
application's control circuit and load circuit. It is
a competitive technology to Electromechanical
Relays (EMRs) and other switching technologies
such as Mercury Displacement Relays (MDRs).

DC

controlled SSRs can be switched by digital systems such as µC based
systems. AC controlled SSRs can be driven by limit switches and sensors
carrying AC control signals.

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Fast Switching Instantaneous turn-on solid state relays and
contactors respond to a control signal in less than 100 µs.
Position Insensitive

Suitable for mounting in either vertical or
horizontal position, "dead bug" position and adjacent mounting.
AMERICA

Reduced Weight Solid state relays and contactors are much
kg

lighter than equivalent electromechanical versions; depending on
the power can be up to 70%.

Magnetic Noise Immunity

Magnetic fields have little
effect on solid state relays and contactors since, unlike
electromechanical contactors, they don't use a magnetic coil to
switch the load.

Reduced Energy Cost Energy savings are achieved from
switching the load off when it is not required; using automation to
ensure maximum system efficiency.

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