VEX Robotics will be closed in observance of Thanksgiving on Thursday, November 22nd, and Friday, November 23rd. Our office will re-open on Monday, November 26th.

Be advised that FedEx will be closed for delivery on Thursday, 11/22. For example, a Next-Day Air order placed by 2:00 PM CST on Wednesday, 11/21, will be delivered on Friday, 11/23. Orders placed after 2:00 PM CST on Wednesday will process and ship out Monday, 11/26, to then be delivered according to the selected shipping speed.

We appreciate your understanding and wish all VEX users a happy holiday!

Spike H-Bridge Relay

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Spike H-Bridge Relay


Spike is a 20 Amp, H-Bridge Relay Module that is small enough to be remotely mounted almost anywhere on your robot. Spike is designed for driving small motors in forward, reverse, or stop (brake). Spike is opto-isolated at the signal input to protect the Robot Controller against motor noise and return currents. Requires a 3-wire cable for connection to the Robot Controller.

  • Ideal for 2 independent solenoids, light, pumps.
  • Design will accept auto-resetting circuit breaker.
  • Compact design.

Availability: Discontinued




The typical application is to power one motor with variable speed forward, reverse, or off (shunt brake).

Spike is not a PWM device. It can not be connected to an R/C hobby type receiver. The Spike is designed to plug into the Relay Ports from the NI roboRIO and legacy devices such as the FIRST ® Robotics Competition Digital Sidecar, Innovation First Robot Controller and Isaac16-RC.

Kit Contents
(1) Spike Relay H-Bridge Module
Docs & Downloads
Battery Info
  • Operating Voltage - 9.5V to 15.5V
  • Power Connector - 1/4" blade connectors
  • Maximum Current - 20A continuous
  • Surge Current - 100A for < 2 second
  • Output Connector - 1/4" blade connectors
CAD File
.12 lbs
Other Info
  • Signal Connector - Uses a standard non-shrouded 3-wire cable
  • Control Signal - High: 3V min @ 4mA / Low: ground (High Max 5-12V current limited to 40 mA)
  • Max Switching - 20 operations per second no load, 6 operation per minute for rated life at rated load
  • Operate Time - 5 ms typical
  • Initial Release Time - 2 ms typical
  • Mechanical Life - 10 million operations
  • Electrical Life - 100K operations at 20A, 14VDC, 1mH