AC Single Phase SSR Solid State Relay AC SSR of Single Dual In line
Specification of AC Single Phase SSR Solid State Relay
AC SSR of Single,Dual In-line
Main technical paramete Type | SAQ2402D | SAl4002D SAl4005D SAE4005D |
| Load voltage | 24-280VAC | 24-280VAC or 40-480VAC |
| Max Load current | 2A(Fig 1) | 2A(Fig 2) | 5A(Fig 3) | 8A(Fig 4) |
| Isolation bet.In & out | Optical isolation ≥2000VAC 1min |
| Isolation to case | ≥2500VAC 1min |
| Control voltage | 3-15VDC or 15-28VDC |
| Control current | 6-25mA Need limit current |
| Turn-on voltage | ≤1.1VAC |
| Off-state leakage | ≤0.5mA |
| Off-state dv/dt | 300v/μs |
| On or off time | 10ms |
| Frequenty range | 47/63Hz |
| Operating temperature | -50~80℃ |
| Internal actual device(Triac) | 3A (Long-term current 1.2A) | 6A (Long-term current 1.5A) | 12A (Long-term current 2.5A) | 16 (Long-term current 5A) |
| Applications | Contactor coil, Electromagnet, AC micro-motor, Heating. etc. |
Solid State Relay DC Input Circuit
solid state relay input
When using mechanical contacts, switches, push-buttons, other relay
contacts, etc, as the activating signal, the supply voltage used
can be equal to the SSR’s minimum input voltage value, whereas when
using solid state devices such as transistors, gates and
micro-controllers, the minimum supply voltage needs to be one or
two volts above the SSR’s turn-on voltage to account for the
switching devices internal voltage drop.
But as well as using a DC voltage, either sinking or sourcing, to
switch the solid state relay into conduction, we can also use a
sinusoidal waveform as well by adding a bridge rectifier for
full-wave rectification and a filter circuit to the DC input .
Solid State Relay AC Input Circuit
ac solid state relay input
Bridge rectifiers convert a sinusoidal voltage into full-wave
rectified pulses at twice the input frequency. The problem here is
that these voltage pulses start and end from zero volts which means
that they will fall below the minimum turn-on voltage requirements
of the SSR’s input threshold causing the output to turn “on” and
“off” every half cycle.
To overcome this erratic firing of the output, we can smooth out
the rectified ripples by using a smoothing capacitor, (C1) on the
output of the bridge rectifier. The charging and discharging effect
of the capacitor will raise the the DC component of the rectified
signal above the maximum turn-on voltage value of the solid state
relays input. Then even though a constantly changing sinusoidal
voltage waveform is used, the input of the SSR see’s a constant DC
voltage.
The values of the voltage dropping resistor, R1 and the smoothing
capacitor, C1 are chosen to suit the supply voltage, 120 volts AC
or 240 volts AC as well as the input impedance of the solid state
relay. But something around 40kΩ and 10uF would do.
Then with this bridge rectifier and smoothing capacitor circuit
added, a standard DC solid state relay can be controlled using
either an AC or non-polarised DC supply. Of course, manufacturers
produce and sell AC input solid state relays (usually 90 to 280
volts AC) already.
Our Company
Founded in 1992, Wuxi Gold Control Technology Co., Ltd., a private
high tech company, is specialized in the research and production of
Solid State Relays, Electronic Semiconductors, DC Motor Drivers and
AC Voltage Regulation Devices.
For the past 10 consecutive years, our company has been qualified
as "Jiangsu's private high tech business". We have also been given
the honor as "Wuxi's 10 Best Private Science & Technology
Enterprises" for years.
Our products, the electronic modules with the brand of Gold, have
been listed among "Wuxi's Renowned Products".Our company has 5
patents on Solid State Relays. Our products are widely used in
various industrial automation control areas like chemical fiber
machinery, temperature control of electric furnace, rubber &
plastic machinery, fountain control and digital-controlled
machinery, and are sold to Europe, America, Korea and Turkey.
Our Factory
Our factory can produce about 50,000 pieces each month. We can give
you good quality and reasonable prices. We have 20 professional
research people who have all been graduated from famous
universities and colleges. When producing, we have strict tests:
self-test, inter-test and special-test.
Our Certificate
Our products, the electronic modules with the brand of Gold, have
been listed among "Wuxi's Renowned Products".Our company has 5
patents on Solid State Relays. Our products are widely used in
various industrial automation control areas like chemical fiber
machinery, temperature control of electric furnace, rubber &
plastic machinery, fountain control and digital-controlled
machinery, and are sold to Europe, America, Korea and Turkey.
Our company passed the Certification of ISO9001:2000 in 2000. Our
main products have been given CE Certificate of European Union,
UL,CUL and RoHS Certificates.
