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FAQ02163 of Solid-state Relays FAQ

FAQ No. FAQ02163

Primary Contents

Question

How are the internal Solid-state Relays circuits configured?

Answer



Examples of Solid-state Relays Internal Circuit Configuration

Load specifications

AC load

Zero cross
function
IsolationCircuit configurationModel
Yes (See
note 1.)
Photo-
coupler
G3H
G3B
G3F
G3NA (AC input)
NoPhototriac
G3NE
G3J
G3F
G3H
G3TA-OA
Yes (See
note 1.)
Phototriac
G3PA-VD
G3PB
(single phase)
G3NA (DC input)
G3NE
Yes (See
note 1.)
Phototriac
G3PB-2(N)
(three phases)
(See note 2.)
Yes (See
note 1.)
Phototriac
G3PB-3(N)
(three phases)
(See note 2.)
Yes (See
note 1.)
Photo-
coupler
G3NA-4[][]B
G3NH
G3PA-4[][]B
G3PB-5[][]B

Load specifications

DC load

Zero cross
function
IsolationCircuit configurationModel
---Photo-coupler
G3FD, G3HD
G3BD
G3TA-OD
G3NA-D

Load specifications

AC/DC load

Zero cross
function
IsolationCircuit configurationModel
NoPhoto-diode coupler
G3FM

Note 1:
The zero cross function turns ON the Solid-state Relay when the AC load voltage is 0 V or close to 0 V. Solid-state Relays with the zero cross function are effective in the following ways.

・Clicking noise when a load is turned ON is reduced.

・Effects on the power supply are reduced by suppressing inrush current with loads, such as lamps, heaters, and motors, thereby reducing inrush current protection circuits.

Note 2:
For 200-V models, use a triac on the output switching elements.

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