Overview
The STK402-000 series products are audio power amplifier hybrid ICs that consist of optimally-designed discrete component power amplifier circuits that have been miniaturized using SANYO's unique insulated metal substrate technology (IMST).  SANYO has adopted a new low thermal resistance substrate in these products to reduce the package size by about 60% as compared to the earlier SANYO STK407-000 series.

FEATUREs
• Series of pin compatible power amplifiers ranging from 20 W ×2 channels to 120 W ×2 channels (10%/1 kHz) devices. The same printed circuit board can be used depending on the output power grade.
• The pin arrangement is compatible with that of the 3-channel STK402-200 series. This means that 3-channel printed circuit boards can also be used for 2-channel products.
• Miniature packages
— 15 W/ch to 40 W/ch (THD = 0.4%, f = 20 Hz to 20 kHz); 46.6 mm ×25.5 mm ×8.5 mm
— 50 W/ch to 80 W/ch (THD = 0.4%, f = 20 Hz to 20 kHz); 59.2 mm ×31.0 mm ×8.5 mm 
• Output load impedance: RL= 6 Ω
• Allowable load shorted time: 0.3 seconds
• Supports the use of standby, muting, and load shorting protection circuits.