Crydom Solid State Relays Sales Brochure

Why Use Solid State

What is a

Switching Technology?

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.

Minimum Electrical
Noise

Zero voltage turn-on and zero
current turn-off allows for
minimum electrical disturbances
generated by solid state relays
and contactors.

Shock & Vibration
Resistant

Solid state switching solutions
are not susceptible to erratic or
unreliable operation when
operating under tough
environments.

Quiet Operation

Solid state switching solutions
make no acoustical noise when
the output contacts change
state. This is highly desirable in
many commercial and medical
applications.

Low Power
Consumption

Solid state relays and
contactors require very little
input power "coil current" to
switch large loads.

Ideal for Harsh
Environments

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

Solid State

Relay / Contactor?

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).

Control

Trigger

Circuit

0

High Compatibility
with Control Systems

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.

Position Insensitive

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

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 Weight

kg

Solid state relays and
contactors are much lighter
than equivalent electromechanical
versions; depending on the
power can be up to 70%.

Fast Switching

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

Reduced Energy Cost

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

HO/CR/RC/EN/US
Rev.070318

Ratings by

AC Output

DC Output

Mounting Type

AC Output

Voltage (Volts)

3 Phase

Current (Amps)

3 Phase

DC Output

Voltage (Volts)

Current (Amps)

*

Single

Dual

Single

Dual

PANEL DIN RAIL PCB PLUG-IN

690
660
530

150

50
50

1000

160

660
600
600

65

6

25

250

30

660
280
280

40
15
15

200 100

20 5

Crydom's maximum ratings per channel

*

280

5

Solid State Relay & Contactor Applications

There are literally thousands of individual uses for Solid State Relays and Contactors. Most can be categorized into the following applications:

Includes conveyor systems, solar trackers, fans, solenoid, valve control,
elevators, lifts, hoists, and exercise equipment.

Applications include: professional food equipment, plastic
molding/extrusion machinery, HVAC&R and soldering equipment.

Includes power supplies, transformers, regulators, inverters, converters,
UPS systems, etc. as well as any load that is not specifically for heating,
lighting or motion control.

These applications are usually broken down into three categories:
theatrical, warehouse and commercial. Many of the products used in this
segment are custom designed.