G3H203SNDC524 Datasheet, PDF (1/12 Pages) Omron Electronics LLC – Solid State Relays Technical Information

Solid State Relays
Technical Information
Glossary
Terms
Circuit functions
Input
Output
Characteristics
Others
Meaning
Photocoupler
Phototriac coupler
Transfers the input signal and insulates inputs and outputs as well.
Zero cross circuit
A circuit which starts operation with the AC load voltage at close to zero-phase.
Trigger circuit
A circuit for controlling the triac trigger signal, which turns the load current ON and OFF.
Snubber circuit
A circuit consisting of a resistor R and capacitor C, which prevents faulty ignition from occurring
in the SSR triac by suppressing a sudden rise in the voltage applied to the triac.
Input impedance
The impedance of the input circuit and the resistance of current-limiting resistors used.
Impedance varies with the input signal voltage in case of the constant current input method.
Operating voltage
Minimum input voltage when the output status changes from OFF to ON.
Reset voltage
Maximum input voltage when the output status changes from ON to OFF.
Operating voltage
The permissible voltage range within which the voltage of an input signal voltage may fluctuate.
Rated voltage
The voltage that serves as the standard value of an input signal voltage.
Input current
The current value when the rated voltage is applied.
Leakage current
The effective value of the current that can flow into the output terminals when a specified load
voltage is applied to the SSR with the output turned OFF.
Load voltage
The effective supply voltage at which the SSR can be continuously energized with the output
terminals connected to a load and power supply in series.
Maximum load current
The effective value of the maximum current that can continuously flow into the output terminals
under specified cooling conditions (i.e., the size, materials, thickness of the heat sink, and an
ambient temperature radiating condition).
Minimum load current
The minimum load current at which the SSR can operate normally.
Output ON voltage drop
The effective value of the AC voltage that appears across the output terminals when the
maximum load current flows through the SSR under specified cooling conditions (such as the
size, material, and thickness of heat sink, ambient temperature radiation conditions, etc.)
Dielectric strength
The effective AC voltage that the SSR can withstand when it is applied between the input
terminals and output terminals of I/O terminals and metal housing (heat sink) for more than 1
minute.
Insulation resistance
The resistance between the input and output terminals of I/O terminals and metal housing (heat
sink) when DC voltage is imposed.
Operating time
A time lag between the moment a specified signal voltage is imposed to the input terminals and
the output is turned ON.
Release time
A time lag between the moment the imposed signal input is turned OFF and the output is turned
OFF.
Ambient temperature and The ranges of temperature and humidity in which the SSR can operate normally under specified
humidity (operating)
cooling, input/output voltage, and current conditions.
Storage temperature
The temperature range in which the SSR can be stored without voltage imposition.
Inrush current resistance A current which can be applied for short periods of time to the electrical element.
Counter-electromotive force Extremely steep voltage rise which occurs when the load is turned ON or OFF.
Recommended applicable The recommended load capacity which takes into account the safety factors of ambient
load
temperate and inrush current.
Bleeder resistance
The resistance connected in parallel to the load in order to increase apparently small load
currents, so that the ON/OFF of minute currents functions normally.
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Solid State Relays Technical Information