The TL308A is a dc electronic load from B&K Precision. It is a programmable electronic load that can be used to simulate electrical loads to test the performance of a DC power source. The TL308A is capable of simulating various non-linear loads such as resistors, inductors, capacitors, batteries and other loads. It features three operating modes: constant voltage, constant current, and constant resistance, and also has four fixed resistance ranges for testing power supplies and batteries. It has two display modes, one for current and one for voltage, and is capable of up to 900A/900W operation. The TL308A also provides protection against input overcurrent, overvoltage, and overtemperature. It is compatible with B&K Precision's TL-301 Power Meter for accurate power measurements.