Signal Consulting, LLC   Model Si5SDOI1-50V-20A

Single, 50V 20A Solenoid Driver with Optically Isolated Input and with Integrated Heat Sink

Si5SDOI1-50V-20A Features: Power Semiconductors: One 60A MOSFET Max. Continuous Current: 20A with  Heat Sink (as shown). Max. Current for 5sec: 40A with Heat Sink  (as shown). Board's Size: 2.4" x 2.3" x 1.9" (5.88cm x 5.8cm x 4.8cm). Components Type: 100% Solid State, NO Relays   A single Inductive Load (Coil or Solenoid) is turned on  or off by a digital control voltage VI1,G   The load current is off (zero) when 0< VI1,G<2.5V and the load current is on (20A max.) when 2.5V< VI1,G<15V Control Input I1: This digital control input is optically isolated from the power source VP (Isolation Breakdown Voltage of 1000V). In addition, the control input (I1) is zener-diode protected and requires only 2mA input current at VI1,G=5V to turn the load-current fully on. Load Isolation: The Load or coil must be isolated from the source voltage (VP)   High Power-Efficiency: 98.5% typical, at 50V and 20A On Board: Filter Capacitors VTS diodes Snubber Circuit Ready Voltage Requirement: A single DC Source Voltage (unregulated) with any voltage value from 9V to 50V (for Vp)    Si5SDOI1-50V-20AV, Spec Sheet  (PDF)

The Si5SDOI1-50V-20A is a Single, 50V 20A Solenoid Driver with an integrated heat sink that uses an optically isolated digital control voltage V_I1,G (0 to 15V) to turn a load-current on or off. This board requires a single 9V to 50V DC power source (unregulated and unfiltered) at a 0A to 20A current range to operate normally with a wide range of inductive loads (coils or Solenoids). The digital control input is zener-diode protected and optically isolated from the power source V_p  (with a breakdown voltage of 1000V); this input requires only 2mA current at (V_In,G=5V) to fully turn on the load current. This current is off (zero) when 0< V_I1,G<2.5V and the load current is fully on (max.) when 2.5V< V_I1,G<15V. Snubbing circuits and filter capacitors are included to suppress inductive switching transients. An onboard LED (red) is used to monitor the load-voltage. A small (2.3”x2.4”x0.45”) finned integrated heat sink is included with mounting hardware (as shown on the photograph) to operate at 20A or 600W power levels. Higher power-levels (30V, 30A or 900W) can be achieved with more efficient heat-sinks. Please click on this link and read the Board Mounting Instructions and Heat Sink Selection Guide. Typical applications are: Inductive-Plunger Driver, SPST Solid State Relay, etc. This board can be configured to perform efficiently in many customized applications.

A Typical Application of the Si5SDOI1-50V-20A

In this application, a high-current (20A at 50V) inductive load (coil or solenoid) is turned on and off by the optically isolated Digital Control Voltage V_I1,G. The load current is off (zero) when 0< V_I1,G<2.5V and the load current is on (max.) when 2.5V< V_I1,G<15V.

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