C1124 Transistor Datasheet -

Based on original datasheets from manufacturers like Hitachi, NEC, and Sanyo (common producers of this part in the late 20th century), the 2SC1124 is classified as a primarily used for AF (audio frequency) and small-signal RF amplification. Below are the absolute maximum ratings and electrical characteristics.

The 2SC1124 is a Sony-manufactured silicon NPN bipolar junction transistor designed for high-voltage, high-frequency audio amplification and low-noise signal processing. Key specs include a 140V-160V breakdown voltage, 1A collector current, 120MHz-140MHz transition frequency, and TO-202/220 packaging. For complete specifications and to purchase, visit Little Diode Donberg Electronics C1124 Transistor Datasheet

Many Japanese TO-92 transistors follow an "E-C-B" configuration (unlike the common North American "C-B-E" seen in 2N3904 or BC547). Always verify the pinout against the C1124 datasheet before soldering. Reversing collector and emitter will result in very low gain (reverse active mode) and likely cause circuit malfunction. Key specs include a 140V-160V breakdown voltage, 1A

The top line on the transistor body is typically printed as . Some manufacturers add a suffix or color dot to indicate the hFE rank: Reversing collector and emitter will result in very

| Parameter | Symbol | Conditions | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Collector Cutoff Current | Icbo | Vcb = 20V, Ie = 0 | - | - | 0.1 | µA | | DC Current Gain (hFE) | hFE | Vce = 6V, Ic = 1mA | 70 | - | 400 | - | | Collector-Emitter Saturation Voltage | Vce(sat) | Ic = 10mA, Ib = 1mA | - | - | 0.3 | V | | Base-Emitter Voltage | Vbe | Vce = 6V, Ic = 1mA | - | 0.65 | - | V | | Transition Frequency | ft | Vce = 6V, Ic = 5mA | - | 80 | - | MHz | | Collector Output Capacitance | Cob | Vcb = 6V, f = 1MHz | - | 4 | - | pF | | Noise Figure | NF | Vce = 6V, Ic = 0.5mA, Rg=10kΩ | - | 2 | 5 | dB |