DTC03A is an ultra-stable and high precision temperature controller for scientific research. It is suitable for wavelength stabilization or wavelength tuning of the laser diode by temperature through a thermo-electric cooler. The compliance voltage of DTC03A is 6V. The maximum output current can be adjusted from 0.1A to 3A in the front panel. User can use a 10kΩ NTC thermistor as the temperature sensor.The setting temperature and actual temperature are displayed in the front panel simultaneously. The temperature resolution is 1mK. User can use the built-in auto tuning function to set the loop parameters to adapt for different heat load.