The transistors’ feature a 4.4-mm × 4.0-mm footprint and can dissipate up to 2.1 W. In quantities of 10,000, the ZX5T851Z and ZX5T951Z are priced at $0.24 each.

Running a brushed motor in muddy or dusty environments takes a toll on controllers, with both heavy back EMF and high stall currents. This explains one of the challenge in Europe’s Hacky Race… ...