Need to power multiple solenoids with high-speed switching but without the cost of multiple solid-state relays? The HSD-4 High Side Driver module is designed to control up to four medium-current 12V devices using solid-state switching, perfect for solenoids that require rapid operation.
Features:
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Four High-Side Drivers:Â Ideal for solenoids that need 12V power instead of ground
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Compatible with MS3Pro, MicroSquirt, or MegaSquirt: Ground-triggered outputs can easily connect to the HSD-4’s inputs
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Handles up to 8 amps per channel:Â Reliable performance for medium current solenoids
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Epoxy potted:Â Maximum vibration and water resistance, suitable for underhood use
Applications Include:
- Toyota A340/A341 transmissions
- Subaru W4A33 transaxles
- BMW Double VANOS variable valve timing solenoids
- Other solenoid setups needing rapid switching and 12V power
The HSD-4 module is perfect for situations where the solenoid ground is tied to the body, and only a single 12V wire powers the solenoid. Designed for fast, precise control in demanding environments.
Specifications:
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Operating Voltage:Â 12V DC
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Maximum Current:Â 8 Amps per channel
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Number of Channels:Â 4 High-Side Drivers
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Trigger Type:Â Ground-triggered
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Switching Frequency:Â Suitable for rapid switching solenoids
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Dimensions: 4.91″ (L) x 1.61″ (H) x 1.97″ (W)
HSD-4 Wiring
| Function |
Connects to HSD-4 wire |
Wire Color |
| Input 1 |
ECU or TCU |
Yellow |
| Output 1 |
Solenoid |
Yellow |
| Input 2 |
ECU or TCU |
Yellow/Orange |
| Output 2 |
Solenoid |
Orange |
| Input 3 |
ECU or TCU |
Yellow/Green |
| Output 3 |
Solenoid |
Green |
| Input 4 |
ECU or TCU |
Yellow/Pink |
| Output 4 |
Solenoid |
Pink |
| Power |
Switched 12V |
Red |
The red wires should all be grouped together and connected to a single fuse to 12V Switched Power. The fuse should be rated for the total current draw of all outputs being used, up to a maximum of 30 amps.
ECU Connections
The inputs need a ground signal to trigger their outputs. Here are what outputs you can use to trigger the HSD-4 high side driver with DIYAutoTune engine or transmission management.
MS3Pro:Â High current, PWM, injector, or tach outputs
MSPNP2 Gen 2:Â Output 1, output 2, boost, or tach outputs
MicroSquirt (transmission control):Â Shift solenoid, TCC, or EPC outputs
MicroSquirt (engine control):Â ALED, WLED, FIDLE, or tach outputs
MS3X:Â Mid current, tach, or injector outputs
MS1 or MS2:Â Relay control outputs or FIDLE (MS2 only)
GPIO Board:Â General purpose, PWM, or high current outputs
