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| Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | Collector-Base Voltage | ( V_CBO ) | 100 | V | | Collector-Emitter Voltage | ( V_CEO ) | 60 | V | | Emitter-Base Voltage | ( V_EBO ) | 6 | V | | Collector Current (DC) | ( I_C ) | 3 | A | | Collector Current (Pulse) | ( I_CP ) | 5 | A | | Collector Dissipation | ( P_C ) | 20 (with heatsink) | W | | Junction Temperature | ( T_J ) | 150 | °C | | DC Current Gain (( h_FE )) | at 500mA | 60 – 240 | - |
instead of 120V+), leading to distortion or burnout under load. Modern Substitutes:
To help narrow down the perfect replacement component for your project, let me know:
The is a silicon NPN power transistor. It was primarily designed for power switching applications and general-purpose amplification .
The 2SC1124 is commonly found in the or TO-220 package. When facing the front (labeled side) with pins pointing downward, the standard pinout is: Base (Left) Collector (Center/Metal Tab) c1124 transistor datasheet better
This comprehensive guide breaks down the detailed breakdown voltage, current capacity, packages, and optimal replacement components for the C1124. Core Specifications Breakdown
was excellent for its time, modern semiconductor manufacturing offers significant advantages over vintage parts: Lower Output Capacitance ( Cobcap C sub o b end-sub
(often connected to the metal tab for heat dissipation) Base 3. Key Applications Video Output : High-frequency response ( ) and high voltage ( ) make it suitable for driving CRT cathodes.
To find a superior alternative, you must first establish a baseline using the original parameters of the 2SC1124. NPN Package Type: TO-39 / TO-5 (Metal Can) Collector-Base Voltage ( VCBOcap V sub cap C cap B cap O end-sub ): 160V Collector-Emitter Voltage ( VCEOcap V sub cap C cap E cap O end-sub ): 160V Emitter-Base Voltage ( VEBOcap V sub cap E cap B cap O end-sub ): 5V Continuous Collector Current ( ICcap I sub cap C ): 1A Total Power Dissipation ( PDcap P sub cap D ): 1W (Without heat sink) / 10W (With case kept at 25°C) DC Current Gain ( hFEh sub cap F cap E end-sub ): 60 to 200 Transition Frequency ( fTf sub cap T ): 100 MHz Why Look for a "Better" Alternative? | Parameter | Symbol | Value | Unit
) : (depending on heat sinking and exact variant) Transition Frequency ( fTf sub cap T ) : 120 MHz to 140 MHz Minimum DC Current Gain ( hFEh sub cap F cap E end-sub ) : 50 Maximum Operating Junction Temperature ( Tjcap T sub j ) : 200 °C Why These Metrics Matter
What is the of the equipment you are repairing?
While the C1124 transistor is a reliable choice, it may not be the best option for every application. Some limitations include:
No. Get a KSC3503 or BF420.
An excellent choice for audio driver circuits, though its transition frequency is slightly lower than the 2. The High-Performance Upgrade: 2SC3502 / 2SC3503
, the C1124 functions seamlessly as a Class-A driver or a long-tailed pair differential input stage transistor in legacy audiophile hardware repairs and modern custom linear power supplies. 6. Sourcing "Better" Data and Identifying Counterfeits
2SC1124 - The Datasheet Archive
