Overview
The STK404-000S 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).  The adoption of a newly-developed low thermal resistance substrate allows this series of devices to be provided in miniature packages significantly more compact than earlier Sanyo products with similar specifications.

Features
• Series of pin compatible power amplifiers ranging from 45W to 180W (10%/1kHz) devices. The same printed circuit board can be used depending on the output power grade.
• Miniature packages
— 30W to 40W (THD=0.4%, f=20Hz to 20kHz); 44.0mm ×25.6mm ×8.5mm *
— 50W to 80W (THD=0.4%, f=20Hz to 20kHz); 46.6mm ×25.5mm ×8.5mm *
— 100W to 120W (THD=0.4%, f=20Hz to 20kHz); 59.2mm ×25.5mm ×8.5mm *
*: Not including the pins.
• Output load impedance: RL=6Ω
• Allowable load shorted time: 0.3 seconds
• Built-in thermal protection circuit
• Supports the use of standby, muting, and load shorting protection circuits.