SSRs need only a small amount of power to operate

So it means that SSRs have a very low power consumption (low input current), even when switching high load currents (Little input power is needed to switch large loads). This represents a huge advantage of Solid State switching against other technologies available on the market :

  1. Most SSRs can operate directly together with a programmable controller,
  2. As SSRs consume less power than traditional electromechanical relays, it makes them more energy-efficient and cost-effective.

Usually, for standard zero-cross single phase SSRs, control current is <13mA for all the voltage range at any operating temperature. But for some application, especially resistive load switching,  our customers are sometimes requiring lower total energy control input. Therefore we have developped a new 50A Solid State Relay with very low input current control (<2mA) : SO965030-HE.

Low input current control : what are the main advantages ?

1- Single source of control, multiple SSR :

Thanks to this low-power control input, it is possible to control more solid state relays from a single control source.

2- Low conduction losses (Less energy waste) :

Lower control current means less power losses in the control circuits, which can be important in a system with many solid state relays.

Main electrical features of SO965030-HE

1- J-FET-based SSR solution (Junction Field Effect Transistor)

Its first important feature is its low energy current regulation with Jfet technology. This feature allows precise current regulation and very low energy losses in the control circuit.

2- 2mA drive current remains stable over a large voltage range – 3,5 to 32VDC

Thanks to this efficient regulation, the control current is only 2mA, and remains stable over a wide voltage range.

Input current (mA) vs. Input voltage (VDC)
(Input current is the current that flows through the SSR when the rated voltage is applied).

As the graph shows, you can see the stability of the control current with an input voltage from 3.5 to 32 VDC.

3- Thermal stability thanks to an Integrated temperature compensation system

This new input circuit integrates a temperature compensation system to ensure proper operation of the SSR regardless of ambient temperature variation.

As you can see on the graph, the input circuit current remains stable from -40 to +85°C.

4- Back to back thyristors with long lifespan – 24 to 600VAC – 50A

On the output circuit side, this new relay is equipped with a back-to-back thyristor with long lifespan.

Its operating voltage range is 24-600 VAC. Finally, this power element supports a nominal current of 50 Amps if the SSR is mounted on the suitable heatsink.

5- Overvoltage protection

A transil diode is integrated into the output circuit to protect it against overvoltage and fast transients bursts.

Main mechanical features of SO965030-HE

relais okpac so7

SO965030-HE is part of our okpac® range of panel mount solid state relays. Its 45 mm hockey puck industrial housing is quick to install with integrated removable covers for IP20 protection.

We remind you that SSRs should be mounted on heatsinks in order to reach nominal current. Our okpac® SSRs are compatible with a wide range of heatsinks.

For more information on this new product, or to download the technical data-sheet you can consult our product page for SO965030-HE. Our sales team stay at your disposal if you have any question.