Technical information

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ds_x61_en_ssr_technical_information: 011212D
Terminology of Phototriac Coupler/AQ-H
Term Symbol Description
Input side
LED forward current IF
Current that flows between the input terminals when the input diode is forward
biased.
LED reverse voltage VR Reverse breakdown voltage between the input terminals.
Peak forward current IFP Maximum instantaneous value of the forward current.
LED dropout voltage VF Dropout voltage between the input terminals due to forward current.
Output side
Repetitive peak OFF-state voltage VDRM
Maximum voltage with repeatability that can be applied continuously between
the output terminals.
ON-state RMS current IT(RSM)
Effective current value, based on designated conditions, that can flow
continuously between output terminals.
Non-repetitive surge current ITSM
Maximum current, without repeatability, that is based on designated conditions.
Normally this is expressed as the wave height value of one power frequency
current sinusoidal cycle.
Peak ON-state voltage VTM
Effective value of the voltage drop when a regulated load current flows between
the output terminals when device is on.
Peak OFF-state current IDRM
Current that flows to output when a regulated load voltage is applied between
the output terminals when device is off.
Electrical
Characteristics
Trigger LED current IFT
Current flow when LED current is augmented and output is on, when regulated
power supply voltage and load has been connected between the output
terminals.
Holding current IH
Load current to maintain on state after output terminals have been turned on
based on designated conditions.
Critical rate of rise of OFF-state voltage dv/dt
Output terminals do not go to the on state from the off state based on designated
conditions.
Zero-cross voltage VZC
In the zero-cross method, when input is turned on, the maximum voltage value
when the output terminals turn on.
Turn on time Ton
Delay time until the output switches on after a designated LED current is made to
flow through the input terminals.
I/O capacitance Ciso Capacitance between the input and output terminals.
I/O isolation resistance Riso
Resistance between terminals (input and output) when a specified voltage is
applied between the input and output terminals.