OVERWIEW: PTCR compressor starter works as a necessary important protection device when starting electronic appliances such as air conditioner, refrigerator. Due to having steep resistance temperature characteristics curve, it can protect the auxiliary winding of motor in series from burning caused by too large current when startup. When the current passing through the PTCR compressor starter increases, its temperature will rise rapidly, so that its resistance will be increased dramatically. Thus, PTCR compressor starter can prevent the current from changing much in order to protect motor. YQ5-1 Type compressor starter's performance is similar with 305C19* Series products made by VISHAY. YQ5-2 is similar with 305C20*. TECHNICAL PARAMETER NO. Parameter Item Typical Data Remark YQ5-1 YQ5-2 1 Max. Voltage Rating (V) ≥500 ≥410 2 Current Rating (A) 18 10 3 Max. Power Dissipation (W) ≤7 ≤3.5 4 Switch Time at 230V (S) 0.75 0.40 5 Normal Temp. Resistance (Ω) R25?0% 35 40 6 Minimum. Resistance (Ω) Rmin?0% 25 30 7 Compressor Range (KW) 1.1～3.0 0.5～1.5