KSC1845 transistor
KSC1845 transistor specification
- KSC1845 is an audio frequency NPN transistor
- Collector to emitter voltage is 120V
- Collector to base voltage is 120V
- Emitter to base voltage is 5V
- Collector current is 50mA
- Base current is 10mA
- Power dissipation is 500mW
- DC current gain is 150 to 580hFE
- Gain Bandwidth (FT) is 110MHz
- Junction temperature is between 150℃
- Noise figure (NF) is 40dB
- Collector to emitter saturation voltage (VCE (SAT)) is07 to 0.30V
- Low noise amplifier component
KSC1845 transistor Pinout
| Pin Number | Pin Name | Description |
| 1 | Emitter | Current flows through the emitter terminal |
| 2 | Collector | Current flows through the collector |
| 3 | Base | The base is the trigger for the transistor |
KSC1845 transistor package
The transistor package used at the KSC1845 transistor is TO-92, it is a common type general purpose transistor.
The TO-92 package is made with a mixture of plastic and epoxy material, this is the reason why they had high heat withstanding capacity in small size.
KSC1845 transistor electrical specification description
In this section, we explain the electrical specification description of the KSC1845 transistor.
Voltage specs
The terminal voltage specs of the KSC1845 transistor are collector to base and collector to emitter voltage is 120v, then emitter to base voltage is 5v, the terminal voltage values show that it is a power amplifier device.
The collector to emitter saturation voltage value of the KSC1845 transistor is 0.07 to 0.30v, the saturation value indicates the switching voltage of this transistor.
Current specs
The collector current value is 50mA, and the current value of the transistor shows the maximum load capacity of the transistor.
Dissipation specs
The power dissipation of the KSC1845 transistor is 500Mw, the dissipation value also depends on the package.
Current gain specs
The current gain value is between 150 to 580Hfe for a KSC1845 transistor, this gain value is apt for an amplification device.
Transition frequency/ Bandwidth frequency specs
The transition frequency value is explained with gain-bandwidth which is between 110MHz, this is an important spec for amplifier and switching-based applications.
Junction temperature
The junction temperature of -55 to 150℃, this is the most common temperature value for a power transistor device.
Noise figure
The noise figure value is 40dB, and the noise figure value is lower for an audio device.
KSC1845 transistor DATASHEET
If you need the datasheet in pdf please click this link
KSC1845 transistor equivalent
The transistors such as 2SC1841, 2SC1845, 2SC2784, and FJV1845 are the transistor equivalents for KSC1845.
Almost all the electrical specifications of these transistors are the same, so we can them as the perfect equivalent for the KSC1845 transistor.
KSC1845 vs KSC1815 vs 2SC2240
The below table shows the comparison of KSC1845 vs KSC1815 vs 2SC2240 transistor, in this table, we try to compare the electrical specifications.
Characteristics KSC1845 KSC1815 2SC2240
Collector to base voltage (VCB) 120V 60V 120V
Collector to emitter voltage (VCE) 120V 50V 120V
Emitter to base voltage (VEB) 5V 5V 5V
Collector current (IC) 50mA 150mA 100mA
Power dissipation 500mW 400mW 300mW
Junction temperature (TJ) 150°C 150°C 125°C
Transition frequency (FT) 110MHZ 80MHZ 100MHZ
Noise (N) 4dB 10dB 6dB
Gain (hFE) 150 to 580hFE 70 to 700hFE -
Package TO-92 TO-92 TO-92
The comparison table compares the electrical specifications of each transistor, KSC1845 and 2SC2240 are similar transistors, because the main specifications of each transistor are the same.
The KSC1815 is a different transistor compared to that, the voltage and gain value are different, this is why KSC1815 had multiple applications than KSC1845 and 2SC2240 transistors.
KSC1845 transistor characteristics
The figure shows the DC current gain characteristics of the KSC1845 transistor, the graph is plotted with DC current gain vs collector current.
The gain value starts at a higher value and then it will drop at a point, but the current value will start to increase and become constant at the end.
The figure shows the static characteristics of the KSC1845 transistor, the graph is plotted with collector current vs collector to emitter voltage.
At a particular base current the collector current becomes constant and the collector to emitter voltage increases towards a point and becomes infinity.
