BSS138W N-Channel logic level enhancement mode MOSFET, 50V drain-source voltage, 210mA continuous drain current, in SOT-323 surface mount package.
Mfr Part #:

BSS138W

Available from 5 distributors
Mfr Name: On Semiconductor
On Semiconductor
N-Channel logic level enhancement mode MOSFET, 50V drain-source voltage, 210mA continuous drain current, in SOT-323 surface mount package.
✓ Total Stock: 13,206 pcs
$ Price Range: $0.13 - $0.61

BSS138W Available from 5 distributors

✓ Authorised
✓ Non-Authorised

BSS138W Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Current
Drain to Source Voltage (Vdss)
Drive Voltage (Max Rds On, Min Rds On)
FET Type
Gate Charge (Qg) (Max) @ Vgs
Halogen Free
Industrial Grade
Input Capacitance (Ciss) (Max) @ Vds
Medical Grade
Military Grade
Mounting Type
Operating Temperature
Power Dissipation (Max)
Rds On (Max) @ Id, Vgs
SVHC Present
Storage Temperature
Supplier Device Package
Tape & Reel
Technology
Vgs (Max)
Vgs(th) (Max) @ Id

BSS138W Description

Short technical summary and product information.

The BSS138W is an N-Channel logic level enhancement mode field effect transistor from On Semiconductor. Designed for low voltage and low current applications, it offers a drain-source voltage rating of 50V and a continuous drain current of 210mA. The device features low on-resistance: 3.5 Ohm maximum at VGS=10V and 6.0 Ohm maximum at VGS=4.5V, enabling efficient switching. Gate threshold voltage ranges from 0.8V to 1.5V, making it suitable for logic level drive.

 

With low gate charge (1.1nC max) and input capacitance (38pF max), the BSS138W provides fast switching performance. Power dissipation is 340mW at 25°C ambient, and the operating junction temperature range is -55°C to 150°C. The device is packaged in a compact SOT-323 surface mount package (also referred to as SC-70), which is ideal for space-constrained designs.

 

Applications include small servo motor control, power MOSFET gate drivers, and other low-voltage switching circuits. The BSS138W is Pb-Free and Halide Free per the datasheet, and is RoHS compliant per manufacturer data.

BSS138W Quick Information

Product Type: N-Channel MOSFET
Canonical Name: N-Channel MOSFET Transistor, 50V, 210mA, SOT-323
Subcategory: Single MOSFET

BSS138W Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Yes

BSS138W Estimated Pricing

Qty Low High
1+ $0.61 $0.61
10+ $0.38 $0.38
100+ $0.24 $0.24
500+ $0.18 $0.18
1,000+ $0.16 $0.16
3,000+ $0.13 $0.13

Estimated market price range - modelled values for guidance only, not live distributor offers.

BSS138W Features

  • N-Channel enhancement mode MOSFET.
  • 50V drain-source voltage rating.
  • 210mA continuous drain current.
  • Low on-resistance: 3.5 Ohm max at 10V.
  • Compact SOT-323 surface mount package.

BSS138W Applications

  • Ideal for low voltage switching applications.
  • Used in small servo motor control circuits.
  • Suitable for power MOSFET gate drivers.
  • Employed in portable electronic devices.

BSS138W FAQs

7 frequently asked questions generated from this part’s specifications.
What is the drain-source voltage rating of the BSS138W?

50V.

What package is the BSS138W available in?

SC-70, SOT-323 (supplier device package SOT-323).

What is the operating temperature range of the BSS138W?

-55°C to 150°C (junction temperature).

Is the BSS138W RoHS compliant?

RoHS3 compliant per manufacturer database (low confidence). The datasheet confirms Pb-Free and Halide Free.

What is the gate threshold voltage of the BSS138W?

0.8V minimum, 1.3V typical, 1.5V maximum at VDS=VGS, ID=1mA.

What is the maximum continuous drain current of the BSS138W?

210mA at Ta=25°C; pulsed drain current is 840mA.

What is the on-resistance of the BSS138W?

3.5 Ohm maximum at VGS=10V, ID=0.22A; 6.0 Ohm maximum at VGS=4.5V, ID=0.22A.

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