Overview
The STK402-200 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 STK408-000 series.

Features
• Series of pin compatible power amplifiers ranging from 20 W ×3 channels to 60 W ×3 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 2-channel STK402-000 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); 59.2 mm ×31.0 mm ×8.5 mm *
*: Not including the pins.
• Achieves superlative heat dissipation due to the adoption of SANYO's Insulated Metal Substrate Technology(IMST).
• Output load impedance: RL= 6 Ω
• Allowable load shorted time: 0.3 seconds
• Supports  the use of standby, muting, and load shorting protection circuits.