C1124 Transistor Datasheet | Better

Typically 60 to 320 (Often categorized into ranks like R, O, Y)

: This complementary pair (TTC004B for NPN, TTA004B for PNP) is a favorite in the DIYAudio community for restoring classic gear like the Sony STR-6055 and the Sansui AU-9500. Many have replaced original 2SA706/2SC1124 pairs directly with the TTA004B/TTC004B. These transistors offer improved power handling (10W vs 5W), making them a robust substitute without changing the circuit's behavior.

Incorporate a fast-recovery clamping diode across the load if driving elements with parasitic inductive footprints to protect the silicon from transient breakdown. Audio Driver and Pre-Amplifier Topologies Thanks to its highly linear hFEh sub cap F cap E end-sub curve spanning from c1124 transistor datasheet better

: These are listed as equivalents by some sources, but are less common in modern restoration projects and are often more difficult to source than the options listed above.

What is this transistor located in (e.g., power supply, audio driver, video output)? Typically 60 to 320 (Often categorized into ranks

Based on the factors mentioned above, here are some alternative transistors that may be better suited for your application:

Used in the driver or output stages of hi-fi systems due to its high voltage handling and linear gain. Incorporate a fast-recovery clamping diode across the load

DC current gain (look for "R", "O", or "Y" rank for specific ranges) 120 – 140MHz Transition frequency (speed for switching/RF) 📍 Pinout & Package