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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Diodes Incorporated BSS84-7

Name: BSS84-7
Brand: Diodes Incorporated
SKU: BSS84-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BSS84-7

Manufacturer:: Diodes Incorporated

Category:: FETs, MOSFETs

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BSS84-7.pdf

Description:: MOSFET P-CH 50V 130MA SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:8,819

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Product details

Overview

BSS84-7 from Diodes Incorporated is a P-channel enhancement-mode MOSFET in SOT23 package, rated for -50V V_DSS, 10Ω R_DS(ON) at V_GS = -5V, and -130mA continuous drain current. It delivers low gate threshold voltage (-0.8 to -2.0V), fast switching, and low input capacitance (C_iss = 24.6–45pF), enabling compact, high-efficiency power switches in space-constrained analog and digital interface circuits.

For engineers reviewing the BSS84-7 datasheet, BSS84-7 pinout, BSS84-7 application, or BSS84-7 equivalent, key selection criteria include verified R_DS(ON) at low V_GS, thermal resistance (R_θJA = 417°C/W), JEDEC-qualified reliability, and SOT23-compatible layout for low-leakage signal routing and load switching.

Technical Context

This MOSFET operates as a normally-off, voltage-controlled switch with gate-driven channel inversion. Its negative V_GS(TH) range (-0.8 to -2.0V) enables direct interfacing with 3.3V/5V logic outputs without level-shifting, while low C_iss and C_rss (2.8–12pF) support sub-20ns turn-on/off delays under 50Ω gate drive.

Thermal performance is defined by 300mW power dissipation on FR-4 PCB and junction temperature range of -55°C to +150°C. The device's R_DS(ON) exhibits <15% variation across -55°C to +125°C, ensuring stable conduction in automotive and industrial ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	-50V - Withstands reverse-biased drain-source voltage up to 50V without breakdown
R_DS(ON)	10Ω max @ V_GS = -5V - Ensures ≤0.65V drop at -65mA load, suitable for low-power load switching
I_D (cont.)	-130mA - Supports logic-level driven loads such as LED biasing or sensor enable lines
V_GS(TH)	-0.8 to -2.0V - Turns on fully with standard 3.3V CMOS output swing (V_OL ≈ 0.4V)
C_iss	24.6–45pF - Limits gate drive energy and enables >1MHz switching in low-duty-cycle applications
R_θJA	417°C/W - Requires minimal copper area for thermal management in non-ventilated enclosures
P_D	300mW - Defines maximum steady-state power handling on standard FR-4 PCB per Diodes' layout spec

Pinout & Package

Package: SOT23 (Standard), 3-terminal surface-mount plastic package with matte tin finish, UL 94V-0 rated, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
Source (S)	Channel return path	Connected to higher potential rail (e.g., V_CC) in high-side switch configuration
Gate (G)	Control electrode	Accepts negative voltage relative to source to induce P-channel conduction; high-impedance input (I_GSS ≤ ±10nA)
Drain (D)	Current output terminal	Delivers switched load current to ground or low-side return; rated for -50V blocking

Key Features

Feature	Design Value
Low gate threshold voltage	Enables full enhancement with 3.3V logic outputs, eliminating need for dedicated gate drivers
Low input capacitance	Reduces gate charge (Q_g = 0.28nC @ V_GS = -4.5V), minimizing drive power and propagation delay
Low leakage current	IDSS ≤ -1µA at V_DS = -50V ensures minimal standby power loss in battery-powered systems
JEDEC-qualified reliability	Qualified to AEC-Q standards for high-reliability operation in automotive and industrial environments

Applications

USB Port Power Switching

Microcontroller GPIO Load Switch

Use Scenario: Selectively enabling/disabling VBUS power to downstream USB peripherals during enumeration or fault recovery.

IC Role / Device Role / Timing Role: High-side load switch controlled by MCU GPIO, turning on when V_GS ≤ -1.5V.

Use Value: Prevents back-powering and bus contention using only 3.3V logic control and <10Ω on-resistance.

Use Scenario: Isolating sensor supply rails or LED anodes from microcontroller I/O pins to avoid overcurrent or latch-up.

IC Role / Device Role / Timing Role: Low-leakage, logic-compatible P-channel switch placed between V_CC and load.

Use Value: Enables clean power gating with <1µA off-state leakage and sub-20ns switching for responsive control.

Level-Shifter Interface

Low-Power Analog Signal Routing

Use Scenario: Translating 1.8V/3.3V logic signals to 5V domains in mixed-voltage systems without active translators.

IC Role / Device Role / Timing Role: Bidirectional pass-gate configured with pull-up resistors, leveraging low C_iss/C_oss.

Use Value: Achieves <10ns propagation delay and <1pF channel capacitance for high-fidelity signal integrity.

Use Scenario: Multiplexing analog sensor outputs (e.g., thermistors, potentiometers) into shared ADC inputs.

IC Role / Device Role / Timing Role: Low-R_DS(ON) analog switch with minimal on-resistance flatness variation (<±0.5Ω) across signal range.

Use Value: Maintains <0.1% gain error in ratiometric measurements due to stable 3.2Ω typical R_DS(ON).

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel MOSFET switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN2004LK-7	R_DS(ON) = 4.5Ω @ V_GS = -4.5V; higher ID rating (-200mA); same SOT23 package	Better suited for higher-current loads (>100mA) with tighter voltage drop requirements	Select when lower on-resistance is critical and board layout allows same footprint
SI2301DS-T1-GE3	R_DS(ON) = 85mΩ @ V_GS = -4.5V; 10× lower R_DS(ON); same pinout but different thermal profile	Requires derating above 60°C ambient due to higher power density; not AEC-Q qualified	Choose for cost-sensitive consumer designs where JEDEC qualification is not required

Compared with DMN2004LK-7 and SI2301DS-T1-GE3, the BSS84-7 offers balanced trade-offs: moderate R_DS(ON) with proven AEC-Q reliability and ultra-low leakage, making it optimal for low-power, high-integrity signal and power switching where thermal margin and long-term stability are prioritized over peak current capability.

Availability

BSS84-7 is available at Aetrix Electronics and suitable for USB port power switching, microcontroller GPIO load switching, level-shifter interface, and low-power analog signal routing requiring stable component supply and consistent SOT23 form factor.

Supply support for BSS84-7 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, specializing in high-reliability, industry-qualified components for automotive, industrial, and computing markets.

The BSS84-7 belongs to Diodes' general-purpose P-channel MOSFET product line, engineered for low-voltage logic-compatible switching in space-constrained, low-power applications where leakage, threshold consistency, and JEDEC reliability are design-critical.

FAQ

What is the maximum continuous drain current for BSS84-7 at 85°C ambient?

At T_A = 85°C, the maximum continuous drain current is derated to approximately -85mA based on its 300mW power limit and 417°C/W thermal resistance. This assumes standard FR-4 PCB mounting with Diodes' recommended pad layout; actual current depends on local copper area and airflow.

Is BSS84-7 suitable for use as a high-side switch with 3.3V microcontroller GPIO?

Yes - its V_GS(TH) range (-0.8 to -2.0V) ensures reliable turn-on when the GPIO drives the gate to 0V while the source is at 3.3V, yielding V_GS = -3.3V. No external level shifter is needed, and R_DS(ON) remains ≤5Ω under this condition.

Does BSS84-7 have automotive-grade qualification?

The BSS84-7 itself is JEDEC-qualified for high reliability but is not AEC-Q200 certified. For automotive applications, Diodes offers the BSS84Q variant, which is explicitly qualified to AEC-Q200 Grade 1 (-40°C to +125°C) and documented in a separate datasheet.

Can BSS84-7 be used in analog switch configurations?

Yes - its low R_DS(ON) flatness (≤0.5Ω variation across V_DS = 0 to -10V) and low C_iss/C_oss make it suitable for bidirectional analog signal routing below 1MHz. Ensure V_GS remains ≤ -1.5V during conduction and avoid exceeding V_DS = -50V or V_GS = ±20V ratings.

BSS84-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

FET Type:: P-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 50 V

Current - Continuous Drain (Id) @ 25°C:: 130mA (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 5V

Rds On (Max) @ Id, Vgs:: 10Ohm @ 100mA, 5V

Vgs(th) (Max) @ Id:: 2V @ 1mA

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

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 45 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 300mW (Ta)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BSS84-7 FAQ

1.How can I place an order for BSS84-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for BSS84-7 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 BSS84-7 reliable?

The price and inventory of BSS84-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSS84-7 is usually 5 days.

3.What payment methods are accepted for BSS84-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSS84-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BSS84-7?

BSS84-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BSS84-7 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 BSS84-7?

For technical support, including BSS84-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSS84-7 requirements.

6.How does Aetrix verify that BSS84-7 is sourced from the original manufacturer or authorized distributors?

All BSS84-7 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 BSS84-7 meets industry standards.

7.What is the process for return or replacement of BSS84-7?

All BSS84-7 units undergo pre-shipment inspection (PSI). If there is an issue with BSS84-7, 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 BSS84-7 part is unused and in its original packaging.

Return procedure for BSS84-7:

1.Submit a request within 90 days.

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

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