If you are working with high-fidelity audio or require a faster transistor, the (or its higher voltage sibling, the Go to product viewer dialog for this item. ) is an outstanding choice. Voltage Rating: 200 V ( VCEOcap V sub cap C cap E cap O end-sub Current Rating: 0.1 A (100 mA) Power Dissipation: 1.2 W Transition Frequency ( fTf sub cap T ): 150 MHz Verdict: Because the ICcap I sub cap C is much lower than the Go to product viewer dialog for this item. , you should only use the Go to product viewer dialog for this item.

Several modern transistors can either perfectly replace or provide improved performance over the 2SC1124. A. Direct/Near-Direct Replacements Arcade Parts and Repair Go to product viewer dialog for this item.

After installing your chosen substitute, verify that the circuit is working correctly by checking DC voltages against the service manual's specifications before connecting speakers or signal sources.

Imagine you are repairing a 1985 Kenwood amplifier that uses four C1124 transistors in the voltage regulator.

stands out because it combines a relatively high voltage rating with high speed, making it more robust than your average general-purpose NPN. NPN Triple Diffused Planar Silicon

Datasheets often list a letter after the number (like C1124-R). This tells you the specific range of current gain (h FE ) for that batch.

If your device has a blown C1124, don't just swap it. Something killed it:

| Parameter | Symbol | Rating | Unit | | :--- | :--- | :--- | :--- | | Collector-Base Voltage | $V_CBO$ | 50 | V | | Collector-Emitter Voltage | $V_CEO$ | 40 | V | | Emitter-Base Voltage | $V_EBO$ | 5 | V | | Collector Current | $I_C$ | 1.0 | A | | Power Dissipation | $P_C$ | 0.8 | W | | DC Current Gain | $h_FE$ | 40 - 240 | | | Transition Frequency | $f_T$ | 150 | MHz |

Looking at the flat side of the transistor with the leads pointing downward, the pin configuration from left to right is: Collector (C) Base (B)