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For Reference Only

Part Number BSS138
Manufacturer Fairchild/Micross Components
Description DIE MOSFET N-CH 50V LL
Datasheet BSS138Datasheet
Package TO-236-3, SC-59, SOT-23-3
In Stock 1149058 piece(s)
Unit Price $ 4.0 *
Please request a real-time quote with our sales team. The unit price would influenced by the quantity requested and the supply sources. Thank you!
Lead Time Can Ship Immediately
Estimated Delivery Time Apr 10 - Apr 15 (Choose Expedited Shipping)
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  • To learn about the specification of BSS138, please search the datasheet by clicking the link above. If you couldn't find the correct datasheet, please refer to the manufacturer's official datasheet.
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ManufacturerFairchild/Micross Components
CategoryDiscrete Semiconductor Products - Transistors - FETs, MOSFETs - Single
Datasheet BSS138Datasheet
PackageTO-236-3, SC-59, SOT-23-3
FET TypeN-Channel
TechnologyMOSFET (Metal Oxide)
Drain to Source Voltage (Vdss)50V
Current - Continuous Drain (Id) @ 25��C220mA (Ta)
Drive Voltage (Max Rds On, Min Rds On)10V
Vgs(th) (Max) @ Id1.5V @ 1mA
Gate Charge (Qg) (Max) @ Vgs2.4nC @ 10V
Input Capacitance (Ciss) (Max) @ Vds27pF @ 25V
Vgs (Max)��20V
Power Dissipation (Max)360mW (Ta)
Rds On (Max) @ Id, Vgs3.5 Ohm @ 220mA, 10V
Operating Temperature-55°C ~ 150°C (TJ)
Mounting TypeSurface Mount
Supplier Device PackageSOT-23-3
Package / CaseTO-236-3, SC-59, SOT-23-3

BSS138 Datasheet

N-Channel Logic Level Enhancement Mode Field Effect Transistor

General Description

These N-Channel enhancement mode field effect transistors are produced using Fairchild’s proprietary, high cell density, DMOS technology. These products have been designed to minimize on-state resistance while provide rugged, reliable, and fast switching performance.These products are particularly suited for low voltage, low current applications such as small servo motor control, power MOSFET gate drivers, and other switching applications.


  • 0.22 A, 50 V. RDS(ON) = 3.5?6?8 @ VGS = 10 V
    RDS(ON) = 6.0?6?8 @ VGS = 4.5 V
  • High density cell design for extremely low RDS(ON)
  • Rugged and Reliable
  • Compact industry standard SOT-23 surface mount package

Absolute Maximum Rating

Symbol Parameter Ratings Units
VDSS Drain-Source Voltage 50 V
ID Drain Current – Continuous (Note 1) 0.22 A
– Pulsed 0.88
PD Maximum Power Dissipation (Note 1) 0.36 W
Derate Above 25°C 2.8 mW/°C
TJ, TSTG Operating and Storage Junction Temperature Range ?6?155 to +150 °C
TL Maximum Lead Temperature for SolderingPurposes, 1/16” from Case for 10 Seconds300°C

Thermal Characteristics

Symbol Parameter Ratings Units
RθJA Thermal Resistance, Junction-to-Ambient (Note 1) 350 °C/W

Package Marking and Ordering Information

Device Marking Device Reel Size Tape width Quantity
SS BSS138 7’’ 8mm 3000 units


Average User Rating
5 / 5 (91)
★ ★ ★ ★ ★
5 ★
4 ★
3 ★
2 ★
1 ★


February 11, 2020

Best way to locate what I need, on a fast and efficient shipping! Keep up the good work!


December 24, 2019

Your prices are low and your website is customer-use friendly.


December 21, 2019

Great seller, item shipped quickly and in great packaging. I will come next time .


December 20, 2019

The helper is super handy, especially if you work with medium size PCB boards as it allows to hold the board steady in every position. It feels pretty sturdy and of good quality.


October 15, 2019

So far so good. I need to see how they hold up.


September 25, 2019

Itams as described Fast and cheap shipping.


September 5, 2019

Very good contact, well packed, hope to buy from you again.

Joe***** Moss

July 2, 2019

It gives you a good quality product, with a great variety.. I will for sure order this set again when i start to run low.

Nehe***** Gopal

June 29, 2019

Excellent website experience for search any product I want, problem solvers. You guys I can trust and reply on.

Make***** Estes

June 11, 2019

As I said before, your crew rock's keep up the fantastic work as we need you out there.


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