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BSS138TA

Name: BSS138TA
Rating: 4.7 (12 reviews)

MOSFET N-CH 50V 200MA SOT23-3

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規格

Supplier	Diodes Incorporated
Package	Tape & Reel (TR),Cut Tape (CT)
ProductStatus	Not For New Designs
FETType	N-Channel
Technology	MOSFET (Metal Oxide)
DraintoSourceVoltage(Vdss)	50 V
Current-ContinuousDrain(Id)@25°C	200mA (Ta)
DriveVoltage(MaxRdsOnMinRdsOn)	10V
RdsOn(Max)@IdVgs	3.5Ohm @ 220mA, 10V
Vgs(th)(Max)@Id	1.5V @ 250µA
Vgs(Max)	±20V
InputCapacitance(Ciss)(Max)@Vds	50 pF @ 10 V
PowerDissipation(Max)	300mW (Ta)
OperatingTemperature	-55°C ~ 150°C (TJ)
MountingType	Surface Mount
SupplierDevicePackage	SOT-23-3

概述

Description

BSS138TA is a small-signal N‑channel MOSFET (enhancement mode) in SOT‑23, part of the widely used BSS138 family. It’s inexpensive and popular for low‑power switching and bidirectional level shifting (e.g., I2C) between logic domains.
Typical ratings (varies by vendor): Vds ~ 50 V, Id around 0.15–0.18 A, Rds(on) a few ohms at Vgs ~ 2.5–4.5 V; Vgs(th) ~ 0.8–1.5 V. The “TA” suffix usually indicates a packaging/variant option (often Tape & Reel) depending on the supplier; check the exact datasheet for your part.
Usage tips: use as a low‑side switch or as part of a bi‑directional level shifter with the gate tied to the lower‑voltage side. Not intended for high‑current or high‑speed power switching.

Features

Key features of the BSS138TA:
- N-channel enhancement-mode MOSFET
- VDS: 50V; VGS(th): typically ~0.8–2.0 V (logic-level)
- RDS(on): around 3–5 Ω (typical ~3.5 Ω) at VGS ≈ 4.5 V
- ID (continuous): ~180 mA (varies by lot)
- Fast switching with low gate charge
- Package: SOT-23 (TA indicates tape-and-reel packaging)
- Temperature range: -55°C to +125°C
- RoHS compliant; suitable for level shifting (I2C/SPI) and small-signal switching

Package

BSS138TA comes in a SOT-23 (3-pin) surface-mount package.

Pinout

- Pin count: 3
- Function: N-channel enhancement-mode MOSFET (small-signal switch/level-shifter)
- Package/pinout: SOT-23; pins are Gate, Drain, Source (typical pinout: Pin 1 = Gate, Pin 2 = Drain, Pin 3 = Source)

Manufacturer

Manufacturer: Vishay Intertechnology (Vishay Siliconix), the maker of the BSS138TA.
What kind of company: Vishay is a global American multinational that designs and manufactures discrete semiconductors (like MOSFETs and diodes) and passive electronic components (resistors, capacitors, inductors, sensors).

Application

BSS138TA is a small N-channel enhancement MOSFET. Common applications:
- Bidirectional level shifting for open-drain buses (I2C/SMBus) between different voltage domains
- Low-current, low-side switching in portable/electronic circuits
- General-purpose signal gating and switching in microcontroller/sensor interfaces
- Space-constrained, hobbyist/prototyping use (SOT-23 package)

Equivalent

BSS138TA is a 60V N‑channel logic‑level MOSFET in SOT‑23. Direct equivalents include: 2N7002 (and variants like 2N7002LT1G/2N7002K), PMV20XN, ZXMN6A01E6, or any similar 60V N‑channel MOSFET with comparable Rdson at Vgs of 2.5–4.5V. Always verify Vds, Id, Rdson, and package to ensure compatibility.