Overview
The BSS138 is an N-Channel Logic Level Enhancement Mode Field Effect Transistor produced by onsemi. This transistor is designed using onsemi’s proprietary, high cell density, DMOS technology. It is optimized for low voltage, low current applications and offers rugged, reliable, and fast switching performance.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Drain-Source Breakdown Voltage (BVDSS) | - | - | 50 | V |
| Gate Threshold Voltage (VGS(th)) | 0.8 | 1.3 | 1.5 | V |
| Static Drain-Source On-Resistance (RDS(on)) @ VGS = 10 V | - | 0.7 | 3.5 | Ω |
| Static Drain-Source On-Resistance (RDS(on)) @ VGS = 4.5 V | - | 1.0 | 6.0 | Ω |
| Continuous Drain Current (ID) | - | - | 0.22 | A |
| Input Capacitance (Ciss) | - | - | 27 | pF |
| Turn-On Delay Time (td(on)) | - | 2.5 | 5 | ns |
| Turn-Off Delay Time (td(off)) | - | 20 | 36 | ns |
Key Features
- Logic Level N-Channel MOSFET with low on-state resistance (3.5 Ω @ VGS = 10 V)
- Low input capacitance (27 pF)
- High switching speed (turn-on and turn-off times of 20 ns each)
- Continuous Drain Current (ID) of 200 mA
- Drain-Source Voltage (VDS) of 50 V
- Minimum Gate Threshold Voltage (VGS-th) of 0.5 V and maximum of 1.5 V
- Available in SOT-23 SMD package
Applications
The BSS138 is particularly suited for low voltage, low current applications such as:
- Small servo motor control
- Power MOSFET gate drivers
- Level shifter circuits
- Other switching applications
Q & A
- What is the maximum drain-source voltage (VDS) of the BSS138?
The maximum drain-source voltage (VDS) of the BSS138 is 50 V. - What is the typical on-state resistance (RDS(on)) of the BSS138 at VGS = 10 V?
The typical on-state resistance (RDS(on)) of the BSS138 at VGS = 10 V is 0.7 Ω. - What is the gate threshold voltage range of the BSS138?
The gate threshold voltage (VGS-th) range of the BSS138 is from 0.8 V to 1.5 V. - What is the continuous drain current (ID) of the BSS138?
The continuous drain current (ID) of the BSS138 is 200 mA. - What is the typical turn-on delay time (td(on)) of the BSS138?
The typical turn-on delay time (td(on)) of the BSS138 is 2.5 ns. - What package type is the BSS138 available in?
The BSS138 is available in the SOT-23 SMD package. - What are some common applications of the BSS138?
The BSS138 is commonly used in small servo motor control, power MOSFET gate drivers, level shifter circuits, and other switching applications. - What is the input capacitance (Ciss) of the BSS138?
The input capacitance (Ciss) of the BSS138 is 27 pF. - What is the thermal resistance, junction-to-ambient (RJA) of the BSS138?
The thermal resistance, junction-to-ambient (RJA) of the BSS138 is 350 °C/W. - Is the BSS138 suitable for high-speed switching applications?
Yes, the BSS138 is suitable for high-speed switching applications with turn-on and turn-off times of 20 ns each.
