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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FET, MOSFET Arrays

Diodes Incorporated BSS138DW-7-F

Name: BSS138DW-7-F
Brand: Diodes Incorporated
SKU: BSS138DW-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BSS138DW-7-F

Manufacturer:: Diodes Incorporated

Category:: FET, MOSFET Arrays

Package:: 6-TSSOP, SC-88, SOT-363

Datasheet:: BSS138DW-7-F.pdf

Description:: MOSFET 2N-CH 50V 0.2A SOT363

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Product details

Overview

BSS138DW-7-F from Diodes Incorporated is a dual N-channel enhancement-mode MOSFET in SOT363 package, rated for 50V V_DSS, 3.5Ω R_DS(ON) at V_GS = 10V, and 200mA continuous drain current. It delivers low gate threshold (0.5–1.5V), fast switching, and low input capacitance (50pF), making it suitable for compact load-switching circuits in portable power management.

For engineers reviewing the BSS138DW-7-F datasheet, BSS138DW-7-F pinout, BSS138DW-7-F application, or BSS138DW-7-F equivalent, key selection criteria include verified dual-N-channel topology, SOT363 thermal performance (R_θJA = 625°C/W), JEDEC-qualified reliability, and automotive-grade variant availability (BSS138DWQ).

Technical Context

This dual discrete MOSFET integrates two independent N-channel devices sharing no internal connection-each channel operates with identical electrical characteristics: V_GS(TH) of 0.5–1.5V ensures reliable turn-on from 3.3V logic, while R_DS(ON) remains ≤3.5Ω at 10V drive and ≤1.4Ω typical. The device uses silicon die on alloy-42 leadframe with matte tin terminations.

Thermal design is constrained by its 200mW power dissipation limit on FR-4 PCB and 625°C/W junction-to-ambient resistance. Dynamic parameters-including 50pF C_iss, 25pF C_oss, and ≤20ns turn-on/turn-off delay times-are specified under standardized 30V/0.2A switching conditions with 50Ω gate drive.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	50V - supports rail voltages up to 50V without breakdown
R_DS(ON) Max	3.5Ω @ V_GS = 10V - enables <200mW conduction loss at 200mA
I_D Continuous	200mA - suitable for low-current load switching (e.g., sensor bias, LED control)
V_GS(TH)	0.5–1.5V - compatible with 1.8V/3.3V microcontroller GPIOs
C_iss	50pF - limits gate drive energy and enables fast edge rates
P_D	200mW - requires thermal-aware PCB layout on FR-4 with recommended pad dimensions
T_J Range	−55°C to +150°C - qualified for extended industrial and automotive ambient environments

Pinout & Package

Package: SOT363 - surface-mount, 6-pin, dual-transistor outline with exposed thermal pad not present; case weight ≈0.006g; moisture sensitivity level 1 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
S1	Source of Channel 1	Low-side return path for first MOSFET; tied to ground or common reference
D1	Drain of Channel 1	Switched output node for first channel; connects to load anode or rail
G1	Gate of Channel 1	Logic-controlled input; requires ≥0.5V to initiate conduction
G2	Gate of Channel 2	Independent logic input for second channel; no internal coupling to G1
D2	Drain of Channel 2	Second switched output; electrically isolated from D1
S2	Source of Channel 2	Return path for second channel; may be connected separately or paralleled with S1

Key Features

Feature	Design Value
Low R_DS(ON)	1.4Ω typical at V_GS = 10V reduces I²R losses in battery-powered load switches
Low V_GS(TH)	0.5V minimum enables direct drive from 1.8V logic without level-shifting circuitry
Low C_iss	50pF minimizes gate charge (Q_g ≈ 1.5nC estimated) for efficient high-frequency PWM control
Fast switching	≤20ns turn-on/turn-off delays support >1MHz switching in DC-DC enable paths
JEDEC-qualified reliability	Qualified to AEC-Q101 stress test standards for high-reliability industrial use

Applications

USB Port Power Switching

IoT Sensor Bias Control

Use Scenario: Enabling/disabling VBUS power to downstream USB peripherals in host controllers or hubs.

IC Role / Device Role / Timing Role: Dual-channel load switch isolating two independent USB ports or VBUS/VCONN rails.

Use Value: Prevents back-powering and meets USB 2.0 hot-plug current limits using independent channel control.

Use Scenario: Sequencing power to multiple low-power sensors (e.g., temperature, humidity) in battery-operated edge nodes.

IC Role / Device Role / Timing Role: Discrete dual switch enabling individual sensor power domains with minimal quiescent current.

Use Value: Achieves sub-1µA off-state leakage per channel, extending multi-year battery life.

LED Current Path Selection

Microcontroller GPIO Expansion

Use Scenario: Selecting between two LED strings (e.g., status + warning) in space-constrained consumer electronics.

IC Role / Device Role / Timing Role: Low-R_DS(ON) dual switch routing current through either LED path based on logic inputs.

Use Value: Eliminates need for discrete transistor arrays; maintains consistent brightness with <3.5Ω on-resistance variance.

Use Scenario: Extending limited MCU GPIO count to drive external logic or analog mux enable lines.

IC Role / Device Role / Timing Role: Level-shifting buffer for 1.8V/3.3V outputs driving 5V-tolerant peripherals.

Use Value: Supports fast toggle rates (>1MHz) with low propagation delay due to minimal gate capacitance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-N-channel load switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN2041LSD-13	R_DS(ON) = 2.8Ω @ V_GS = 4.5V; higher C_iss (90pF); SO-8 package	Requires larger board area; better suited for higher-current (500mA) loads	Select when higher current handling and SO-8 thermal mass are preferred over SOT363 footprint
NTZD3154P	R_DS(ON) = 4.5Ω @ V_GS = 4.5V; lower V_GS(TH) (0.35V min); same SOT-363 package	Superior 1.8V drive capability but higher on-resistance increases conduction loss	Choose for ultra-low-voltage systems where gate drive margin is critical and 15% R_DS(ON) penalty is acceptable

Compared with DMN2041LSD-13 and NTZD3154P, BSS138DW-7-F offers optimal balance of low R_DS(ON), proven JEDEC qualification, and minimal SOT363 footprint-ideal for space-constrained, battery-sensitive designs requiring dual independent switching.

Availability

BSS138DW-7-F is available at Aetrix Electronics and suitable for USB power switching, IoT sensor bias control, LED current path selection, and microcontroller GPIO expansion requiring stable component supply and long-term production continuity.

Supply support for BSS138DW-7-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The BSS138DW belongs to Diodes' general-purpose MOSFET product line, engineered for cost-effective, high-reliability discrete switching in portable, industrial, and automotive-qualified applications.

FAQ

Is BSS138DW-7-F pin-compatible with single-channel BSS138 variants?

No. BSS138DW-7-F is a dual-channel SOT363 device with six pins (S1/D1/G1/G2/D2/S2), whereas single-channel BSS138 variants (e.g., BSS138-7-F) use SOT23-3 with three pins (G/D/S). Layout and routing are not interchangeable; redesign is required for substitution.

Does BSS138DW-7-F include integrated ESD protection?

No. The datasheet does not specify on-chip ESD protection diodes. External TVS or RC filtering is recommended for I/O lines exposed to human contact or cable interfaces, especially in USB or sensor applications where electrostatic discharge risk is elevated.

What is the maximum safe operating frequency for PWM switching with BSS138DW-7-F?

Based on ≤20ns turn-on/turn-off delay times and 50pF input capacitance, the device supports clean switching up to ~5MHz in low-load (<50mA), low-V_DS (<12V) conditions. For 200mA loads at 30V, practical PWM operation is limited to ≤1MHz to maintain efficiency and avoid excessive gate drive power.

Can both channels be paralleled to increase current capacity?

Not recommended. The device lacks matched R_DS(ON) tracking or thermal coupling; paralleling introduces current imbalance due to parametric variation (±25% R_DS(ON) tolerance) and unequal self-heating. Use a single-channel part rated for higher current instead.

BSS138DW-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-TSSOP, SC-88, SOT-363

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: MOSFET (Metal Oxide)

Configuration:: 2 N-Channel (Dual)

FET Feature:: Logic Level Gate

Drain to Source Voltage (Vdss):: 50V

Current - Continuous Drain (Id) @ 25°C:: 200mA

Rds On (Max) @ Id, Vgs:: 3.5Ohm @ 220mA, 10V

Vgs(th) (Max) @ Id:: 1.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: -

Input Capacitance (Ciss) (Max) @ Vds:: 50pF @ 10V

Power - Max:: 200mW

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-363

BSS138DW-7-F FAQ

1.How can I place an order for BSS138DW-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BSS138DW-7-F on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BSS138DW-7-F reliable?

The price and inventory of BSS138DW-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSS138DW-7-F is usually 5 days.

3.What payment methods are accepted for BSS138DW-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSS138DW-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BSS138DW-7-F?

BSS138DW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BSS138DW-7-F order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BSS138DW-7-F?

For technical support, including BSS138DW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSS138DW-7-F requirements.

6.How does Aetrix verify that BSS138DW-7-F is sourced from the original manufacturer or authorized distributors?

All BSS138DW-7-F products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BSS138DW-7-F meets industry standards.

7.What is the process for return or replacement of BSS138DW-7-F?

All BSS138DW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BSS138DW-7-F, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BSS138DW-7-F part is unused and in its original packaging.

Return procedure for BSS138DW-7-F:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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