BSS138K BSS138K is an N-Channel logic level enhancement mode MOSFET by On Semiconductor. It features a 50V drain-source voltage, 220mA continuous drain current, and low on-resistance of 1.6 Ohm at 5V gate drive, housed in a surface-mount SOT-23-3 package.
Mfr Part #:

BSS138K

Available from 8 distributors
Mfr Name: On Semiconductor
On Semiconductor
BSS138K is an N-Channel logic level enhancement mode MOSFET by On Semiconductor. It features a 50V drain-source voltage, 220mA continuous drain current, and low on-resistance of 1.6 Ohm at 5V gate drive, housed in a surface-mount SOT-23-3 package.
✓ Total Stock: 1,621,239 pcs
$ Price Range: $0.08 - $0.33

BSS138K Available from 8 distributors

✓ Authorised
✓ Non-Authorised

BSS138K Specifications Quick View

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

BSS138K Description

Short technical summary and product information.

The BSS138K is an N-Channel logic level enhancement mode field effect transistor manufactured by On Semiconductor. Designed for low-voltage switching applications, it offers a maximum drain-source voltage (Vdss) of 50V and a continuous drain current of 220mA at 25°C ambient temperature, with a pulsed drain current rating of 0.88A.

 

Key electrical characteristics include a maximum drain-source on-resistance (Rds(on)) of 1.6 Ohm at VGS=5V and ID=50mA, ensuring efficient switching with low conduction losses. The gate threshold voltage (Vgs(th)) ranges from 0.6V to 1.2V, allowing direct interfacing with low-voltage logic circuits. The device also features low input capacitance (Ciss typical 58pF) and a maximum total gate charge of 2.4nC at VGS=10V, contributing to fast switching speeds.

 

The BSS138K is housed in a surface-mount SOT-23-3 package (also known as TO-236-3 or SC-59), making it suitable for compact PCB designs. It is rated for an operating junction temperature range of -55°C to +150°C and has a maximum power dissipation of 350mW when mounted on a standard FR-4 PCB. The device is Pb-Free and RoHS compliant, and it is supplied in tape and reel packaging with 3000 pieces per reel.

BSS138K Quick Information

Product Type: MOSFET
Series: BSS138
Canonical Name: BSS138K N-Channel Logic Level Enhancement Mode MOSFET
Subcategory: N-Channel MOSFET

BSS138K Compliance

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

BSS138K Estimated Pricing

Qty Low High
1+ $0.33 $0.33
10+ $0.20 $0.20
100+ $0.13 $0.13
500+ $0.10 $0.10
1,000+ $0.08 $0.08
3,000+ $0.08 $0.08

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

BSS138K Features

  • N-Channel logic level enhancement mode MOSFET.
  • 50V maximum drain-source voltage rating.
  • 220mA continuous drain current at 25°C.
  • Low 1.6 Ohm on-resistance at VGS=5V.
  • Surface-mount SOT-23-3 package.

BSS138K Applications

  • Ideal for low-voltage load switching circuits.
  • Used in DC-DC converter auxiliary circuits.
  • Suitable for portable battery-powered devices.
  • For signal level shifting and interface switching.

BSS138K FAQs

6 frequently asked questions generated from this part’s specifications.
What is the maximum drain-source voltage (Vdss) of BSS138K?

The maximum drain-source voltage (Vdss) is 50 V.

What is the continuous drain current rating?

The continuous drain current is 0.22 A (220 mA) at TA=25°C.

What is the typical on-resistance (Rds(on))?

The typical maximum Rds(on) is 1.6 Ohm at VGS=5V and ID=50mA.

What is the operating temperature range?

The operating junction temperature range is -55°C to +150°C.

What package is the BSS138K available in?

The BSS138K is available in SOT-23-3 surface mount package (also TO-236-3, SC-59).

Is the BSS138K RoHS compliant?

Yes, the BSS138K is RoHS3 compliant and Pb-Free.

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