This is a high power dc motor driver based on VNH2SP30 chip from ST.  It is designed for high power dc motor control applications with peak current up to 30A and continuous current of 14A.

The module is easy to use with arduino or any other microcontroller. The motor driver also have thermal shutdown capability for  protection of overheating, it also have current sensing and overvoltage protection. It is very similar to sparkfun Monester moto driver, the only difference is that this module drive only one motor at a time.

Specifications

• Maximum Current Rating: 30 A
• Practical Continuous Current: 14 A
• Voltage Max: 16V
• Maximum PWM Frequency: 20 kHz
• Thermal Shutdown
• Under_voltage and Over_voltage shutdown
• Current sensing available to Arduino analog pin
• Weight: 25g
• Size: 53 x 22mm

Pin Definition

• Out A, Out B:    Motor Power
• PWR (+/-):         Power Supply Voltage
• PWM:                 Pulse Width Signal (control the motor speed)
• INA, INB:          Rotation direction and brake control
• CS:                    Current Sensor (optional)
• EN:                    Status of switches output (Analog pin - Optional)

VNH2SP30 motor driver user manual and arduino tutorial