UA7307TC — Class AB mono audio amplifier, 2W into 8Ω
The UA7307TC is a Class AB audio amplifier in an 8-DIP through-hole package, delivering 2W into an 8Ω load from a single channel. Supply range spans 3V to 16V, and the junction temperature rating of -40°C to 150°C covers industrial and under-hood automotive environments.
2W mono output — what it means for the load
Rated at 2W into 8Ω, this amplifier drives a single small speaker or earpiece. That power level fits line-level audio output stages, intercoms, or alarm annunciators — not a full-range stereo system. The 8Ω load is a standard impedance for small drivers; lower impedances will demand more current and may exceed the device's output capability.
Supply voltage and temperature range
Operates from 3V to 16V, so it works on a single 5V rail or a 12V automotive battery line. The -40°C to 150°C junction temperature rating means it can sit in an engine bay or outdoor enclosure without derating for ambient heat — though the 2W output at high ambient will need a heatsink or airflow to keep the die below 150°C.
Lifecycle and sourcing
Listed as Active in production — no last-time-buy or end-of-life notice on record. The part is RoHS non-compliant, so it is not for new designs requiring RoHS exemption-free compliance, but it remains available for legacy BOMs and repair stock.