2SA1837
A1837 electrical specification
- 2SA1837 PNP epitaxial silicon transistor device
- Collector to emitter voltage (VCE) is -230V
- Collector to base voltage (VCB) is -230V
- Emitter to base voltage (VEB) is –5V
- Collector current (IC) is -1mA
- Base current (IB) is -1A
- Power dissipation is 2W to 20W
- DC current gain is 100 to 320hFE
- Transition frequency (FT) is 70MHz
- Junction temperature/storage temperature is between -55 to 150℃
- Collector to emitter saturation voltage (VCE (SAT)) is -1.5V
- Output capacitance is 30pF
- High frequency transistor
A1837 transistor Pinout
| Pin Number | Pin Name | Description |
| 1 | Base | Base terminal is the trigger for the transistor |
| 2 | Collector | Current flow through the collector |
| 3 | Emitter | Current flows through the emitter terminal |
2SA1837 package
2SA1837 is a high-frequency transistor having TO-220/TO-220F device package, it is a power transistor package made of epoxy/plastic material that has a higher temperature capacity.
TO-220/ TO-220F device packages are compact as electronic devices, so we use them for different mini-applications, it is a through-hole device package we can easily attach a heat sink with it.
2SA1837 transistor electrical specification & application description
In this section we explain the electrical specifications of the A1837 transistor, this will be very useful for the replacement process.
Voltage specs
The voltage specs of the A1837 transistor are collector to base voltage is -230V, collector to emitter voltage is -230V, and emitter to base voltage is -5V.
The collector-to-emitter saturation voltage is -1.5V, which is the triggering voltage value of the 2SA1837 transistor.
The total terminal voltage and saturation voltage of the A1837 transistor shows that it is a high-voltage device having multiple applications.
Current specs
The collector’s current value is -1A, and the maximum load capacity of the device is calculated with the current value.
The base current value of the A1837 transistor is -0.1A, it is the current value that is used to trigger the device.
Dissipation specs
The power dissipation value of the A1837 transistor is 2W to 20W, this value is mainly dependent on the component package.
Current gain specs
The DC gain value of A1837 is 100 to 320hFE, this value is important for the amplification applications.
Transition frequency
The transition frequency value is 70MHz, which is the total frequency value of the transistor at the circuit application
Junction temperature/ storage temperature
The junction temperature/ storage temperature of -55 to 150℃.
Output capacitance
The output capacitance of the 2SA1837 transistor is 4pF
2SA1837 transistor DATASHEET
If you need the datasheet in pdf please click this link
2SA1837 equivalent
The A1837 transistor has equivalent devices such as 2SA2182, MJE5851, KTA1837, MJE5852G, MJE15035, MJE5850, MJE15033G, and 2SA1006B, we need to check and verify the PINOUT details and voltage specifications of each transistor before the replacement process.
2SA1837 complementary pair
The 2SA1837 PNP transistor has a complementary pair 2SC4793 NPN transistor device, the electrical specifications of both transistors are the same, so we can easily use them for push-pull networks.
2SA1837 vs 2SA2182 vs MJE5851
We list and compare the electrical specifications of 2SA1837, 2SA2182, and MJE5851 devices, this comparison is useful for better understanding.
| Characteristics | 2SA1837 | 2SA2182 | MJE5851 |
|---|---|---|---|
| Collector to emitter voltage (VCE) | -230V | -230V | -350V |
| Collector to base voltage (VCB) | -230V | -230V | -400V |
| Emitter to base voltage (VEB) | -5V | -5V | -6V |
| Collector to emitter saturation voltage (VCE (SAT)) | -1.5V | -0.5V | 2V to 5V |
| Collector current (IC) | -1A | -1.0A | -8A |
| Base current (IB) | -0.1A | -100mA | -4A |
| Power dissipation | 2W to 20W | 2W to 20W | 80W |
| Junction temperature (TJ) | -55 to +150°C | -55 to +150°C | -65 to +150℃ |
| Transition frequency (FT) | 70MHz | 80MHz | - |
| Gain (hFE) | 100 to 320hFE | 100 to 320hFE | 5 to 15hFE |
| Output capacitance | 30pF | 22.5pF | 270pF |
| Package | TO-220/TO-220F | TO-220 | TO-220AB |
A1837 applications
- Power amplifier applications
- Driver stage amplifier applications
- High power amplifier
- Motor driver circuit
- RF circuits
2SA1837 transistor graphical characteristics
The figure shows the output characteristics of the 2SA1837 transistor, and the graph plots with collector current vs collector to emitter voltage.
At different base current values, the collector current value increases towards infinity with respect to the collector-to-emitter voltage.
The figure shows the DC current gain characteristics of the 2SA1837 transistor, the graph plots with DC current gain vs collector current.
At the initial stages the gain value increases constantly and becomes constant and then it decreases with respect to the collector current.
The figure shows the safe operating characteristics of Sthe 2SA1837 transistor, which plots with collector current vs collector to emitter voltage.
