In this paper, InAs-based type-II interband cascade lasers operating at the mid-infrared range were fabricated and characterized. The maximum operating temperatures under pulsed and continuous wave (CW) operating mode were determined to be 275 K and 226 K, respectively. The threshold current density was around 17 A/cm² at 80 K with an emission wavelength of approximate 3.8 μm. We analyzed the self-heating effects under CW mode and further simulated the temperature contour by the finite element method. The results indicate that the self-heating effect is a critical factor that limits the operating temperature under CW mode for our devices. Further optimization of the heat dissipation performance would be an effective way to raise the operating temperature of the devices.