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. |
How to select a solid state relay
When selecting which solid state relay to use it is first necessary
to define what it needs to be able to switch and how this needs to
be achieved. There are a few useful steps to take and questions to
ask:
AC or DC: There are different types of solid state relay used for
switching AC or DC. Determining whether AC or DC power is to be
switched is one of the most fundamental selections. As AC solid
state switches typically use triacs and thyristors they do not work
on DC and would not turn the load off, unless the DC falls to zero
for some other reason. DC solid state switches typically use
MOSFETs as they have a very low ON resistance.
Also remember that the input and output may be different - an SSR
may be designed to control an AC output, but require a DC control
voltage input, etc. In some instances a bridge rectifier, and
possibly other electronic components may be required on the input
to create the required control signal if they are not contained
within the SSR package - check the specification to find out what
may be needed.
Voltage range: It is necessary to determine the required voltage
for the SSR. If DC is to be switched then select a solid state
relay with at least 25% greater voltage rating than the maximum
voltage anticipated. Ideally a greater margin would improve the
reliability.
For AC SSRs, the AC voltage required for the application should be
checked - again add a margin. Even though transients are present on
many AC lines, AC solid state relays should be able to accommodate
these as they are likely to have inbuilt protection (see below),
but it is always best to check the specification.
Load current: Apart from the voltage, it is also necessary to know
the current that will pass through the device. If too much current
flows through the device then it will overheat and could be
destroyed.
One point of which to be aware is the inrush current that many
circuits exhibit. When first turned on, some items can draw levels
of current that far exceed the average current drawn. It is
therefore necessary to allow for this when selecting the solid
state relay. Typically a multiplier is applied to the average
current dependent upon the load which is being switched.
LOAD TO BE SWITCHED MULTIPLIER
Fluorescent lights (AC) 10
Incandescent light bulbs 6
Motors 6
Resistive heaters 1
Transformers 20
The average current to be consumed should be multiplied by the
multiplier and the solid state relay chosen with this value for the
current.
Dimming: If dimming is required, then some forms of solid state
relay are able to provide a dimming function where the output is
controlled by the level of the input.
Surge protection: If the solid state switch is to be used with AC,
check that it has surge protection built in - most do be best to
check. Surge or transient protection is normally provided using
metal oxide varistors, MOVs. These metal oxide varistors absorb the
transients and prevent them from damaging the SSR.
These points provide most of the major points to be considered when
selecting a solid state relay. It is always good to read the whole
of the SSR specification to ensure that there are no points that
might adversely affect the operation of the overall circuit when in
operation.
Solid state relays are ideal devices for many switching
applications - they are faster and generally more reliable than
electromechanical relays, although they are less resilient to
transient spikes and other overload conditions.
In view of their superior operation in many scenarios, solid state
relays are used in many circuits, with current and voltage ratings
being available for many switching applications.
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.
