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BSS123-7-F-W-VB Product details
Back to previous pageProduct introduction：
BSS123-7-F-W-VB is a Single N-MOS deeply optimized for high-voltage low-power switching scenarios. The Planar process balances stable withstand voltage and low leakage characteristics, while the SOT23-3 package strikes a balance between heat dissipation and board space. The combination of 650V withstand voltage, 1A current capacity, and 8400mΩ on-resistance makes it an ideal cost-effective option for high-voltage auxiliary power supplies, AC-DC primary side detection, relay driver, and other applications, especially suitable for high-density, low-cost high-volume designs.
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Product parameter：
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds2.5 | Rds4.5 | Rds10 | Technology |
|---|---|---|---|---|---|---|---|---|---|
| SOT23-3 | Single-N | 650V | 3.5V | 1A | 8400(mΩ) | Planar |
| VB Package | Configuration | VCE | VGE | VGEth(V) | VCEsat15V | ICE | Technology |
|---|---|---|---|---|---|---|---|
| SOT23-3 | Single-N | Planar |
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds18 | Technology |
|---|---|---|---|---|---|---|---|
| SOT23-3 | Single-N | 650V | 3.5V | 1A | Planar |
| VB Package | Configuration | VDS(V) | VGS | Vthyp（V） | ID(A) | Rds6 | Technology |
|---|---|---|---|---|---|---|---|
| SOT23-3 | Single-N | 650V | 3.5V | 1A | Planar |
| VB Package | Polarity | Vz / VR | Pd | VF | IF | IR | Cd | Type |
|---|---|---|---|---|---|---|---|---|
| SOT23-3 | Single-N |
VDS=650V: Compatible with wide input voltage systems, easily handles the high-voltage bus after 220V/380V AC rectification, providing ample margin for spikes and high reliability.
VGS=±30V: Wide gate drive voltage tolerance, compatible with various PWM controllers and driver ICs, no additional clamping circuits required.
Vth=3.5V (Typical): Moderate threshold voltage, strong anti-interference capability, suitable for stable driving by dedicated driver chips or high-voltage drivers.
RDS(on)=8400mΩ @ VGS=10V: Typical on-resistance for high-voltage devices, low turn-on losses, suitable for small current high-voltage switching scenarios.
ID=1A: Continuous current capability meets auxiliary power supply and small power load switching needs, with reliable peak current margin.
Package SOT23-3: Compact size, low parasitic parameters, saves PCB area, suitable for compact power modules and cost-sensitive assembly applications.
VGS=±30V: Wide gate drive voltage tolerance, compatible with various PWM controllers and driver ICs, no additional clamping circuits required.
Vth=3.5V (Typical): Moderate threshold voltage, strong anti-interference capability, suitable for stable driving by dedicated driver chips or high-voltage drivers.
RDS(on)=8400mΩ @ VGS=10V: Typical on-resistance for high-voltage devices, low turn-on losses, suitable for small current high-voltage switching scenarios.
ID=1A: Continuous current capability meets auxiliary power supply and small power load switching needs, with reliable peak current margin.
Package SOT23-3: Compact size, low parasitic parameters, saves PCB area, suitable for compact power modules and cost-sensitive assembly applications.
Domain and module applications：
Decision Value Analysis
Switching Power Supply Auxiliary Supply: High voltage withstand supports flyback auxiliary winding power supply, stably driving PWM IC, small package saves power board space.
AC-DC Primary Side Detection: 650V withstand voltage can directly connect to the high-voltage bus, used for startup circuits, bus voltage monitoring, etc., with low power consumption and fast response.
Relay and Solenoid Driver: High voltage tolerance combined with low current drive can replace discrete high-voltage switches, simplifying PCB layout.
LED Lighting High-Voltage Auxiliary Circuit: Acts as a startup switch in non-isolated buck or linear high-voltage solutions, with strong surge immunity and high reliability.
Industrial Control Low-Power Load: Used for high-voltage signal sampling or low-power switching in PLCs, inverters, etc. Planar process ensures long-term stability.
Smart Meter and Metering Equipment: High-voltage side power management and data acquisition isolated power supply; low leakage characteristics aid low standby power design.
Consumer Electronics Power Adapter: Suitable for high-voltage startup circuits in adapters up to 65W, reducing startup resistor power loss and improving light load efficiency. Selection Summary: BSS123-7-F-W-VB achieves a balance between high voltage withstand, small package, and system cost. It is a cost-effective general-purpose choice for 650V high-voltage low-power switching applications, especially suitable for power supply and industrial control projects with strict space and power consumption requirements.
* Please note: the above is only an example application scenario, the specific application depends on the requirements and conditions of the system design. When using this device, consult its data sheet for detailed technical specifications and features
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