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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Diodes Incorporated BAT43WS-7-F

Name: BAT43WS-7-F
Brand: Diodes Incorporated
SKU: BAT43WS-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BAT43WS-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: SC-76, SOD-323

Datasheet:: BAT43WS-7-F.pdf

Description:: DIODE SCHOTTKY 30V 200MA SOD323

Quantity:: RFQ Add To RFQ list

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Inventory:38,706

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Product details

Overview

BAT43WS-7-F from Diodes Incorporated is a surface-mount Schottky barrier diode in SOD323 package, rated for 30 V peak reverse voltage and 200 mA continuous forward current, with ultra-low forward voltage drop (0.26–0.33 V at 2.0 mA) optimized for low-power signal rectification and reverse polarity protection in space-constrained portable electronics.

For engineers reviewing the BAT43WS-7-F datasheet, BAT43WS-7-F pinout, BAT43WS-7-F application, or BAT43WS-7-F equivalent, key selection criteria include its 5 ns reverse recovery time, 10 pF junction capacitance at 1 V, 625 °C/W thermal resistance, and AEC-Q200 readiness via IATF 16949 manufacturing - critical for battery management, USB interface protection, and wearable sensor power rails.

Technical Context

This Schottky diode uses a platinum-silicide or similar low-barrier metal-semiconductor junction to achieve sub-0.4 V forward conduction at low currents, minimizing voltage loss in bias networks and clamping paths. Its 5 ns t_RR enables operation in high-frequency switching applications up to ~100 MHz without significant switching loss.

The SOD323 package's 0.004 g mass and 1.30 mm × 1.70 mm footprint support automated placement on dense PCBs, while its J-STD-020 Level 1 moisture sensitivity rating permits standard reflow without baking. Thermal performance is defined for FR4 boards with Diodes' recommended pad layout (0.45 mm Y, 2.70 mm X1).

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	30 V - Maximum repetitive reverse blocking capability without breakdown; suitable for 24 V system rail clamping.
V_F @ 2.0 mA	0.26–0.33 V - Enables <100 mV dropout in low-current bias networks, preserving headroom in 1.8 V/3.3 V logic domains.
t_RR	5.0 ns - Supports clean edge transition handling in 20+ MHz clock line steering or RF detector circuits.
C_T @ 1 V	10 pF - Limits capacitive loading on high-impedance analog nodes (e.g., op-amp inputs, crystal oscillator feedback paths).
R_θJA	625 °C/W - Requires derating to ≤120 mA at 75 °C ambient on standard FR4; dictates minimum copper area for thermal relief.
I_FSM	4.0 A @ 10 ms - Withstands brief ESD-induced surge events or hot-swap inrush transients without failure.

Pinout & Package

Package: SOD323 - ultra-small plastic surface-mount package (1.30 mm × 1.70 mm × 0.90 mm), cathode-band marked, matte tin-plated terminals, UL 94V-0 rated, weight 0.004 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to higher-potential node (e.g., input rail, signal source anode); determines forward conduction direction.
Cathode (marked by band)	Forward current exit / reverse blocking terminal	Connected to lower-potential node (e.g., ground, load return); reverse voltage applied here must stay ≤30 V.

Key Features

Feature	Design Value
Low forward voltage at microamp/milliamp levels	0.26 V min @ 2.0 mA - Reduces quiescent power loss in always-on sensor bias chains by >60% vs. silicon PN diodes.
Ultra-fast reverse recovery	5 ns t_RR - Eliminates tail current in sample-and-hold or peak-detect circuits, preventing measurement error.
SOD323 footprint compatibility	Standardized 0.65 mm pitch, 0.30 mm lead width - Enables direct replacement of BAT54S, SD103AWS, or similar dual-Schottky packages in single-diode positions.
Halogen- and antimony-free "Green" construction	<900 ppm Br, <900 ppm Cl, <1000 ppm Sb - Meets IPC-1752A Class 3 material declarations for automotive and medical OEMs.

Applications

USB Port Protection

Low-Power Sensor Biasing

Use Scenario: Preventing reverse current flow from VBUS to host-side peripherals during cable hot-plug or power-loss events.

IC Role / Device Role / Timing Role: Reverse polarity protection diode in series with 5 V supply path; blocks backfeed while adding <0.3 V dropout.

Use Value: Enables safe 5 V hot-swap compliance without sacrificing >4.7 V minimum rail voltage to downstream USB devices.

Use Scenario: Providing stable bias current to MEMS accelerometers or temperature sensors operating from coin-cell batteries.

IC Role / Device Role / Timing Role: Low-leakage DC bias feed diode; supplies regulated current while blocking leakage from sensor output pins.

Use Value: Achieves <500 nA reverse leakage at 25 V, extending 10-year battery life in IoT endpoint designs.

RF Detector Clamp

Crystal Oscillator Load Matching

Use Scenario: Limiting RF envelope detector output swing to prevent op-amp saturation in AM demodulation stages.

IC Role / Device Role / Timing Role: Signal clamp diode shunting excess RF peaks to ground; operates in small-signal AC mode.

Use Value: 10 pF C_T and 5 ns t_RR preserve detector bandwidth up to 100 MHz without phase distortion.

Use Scenario: Fine-tuning load capacitance in Pierce oscillator circuits for ±10 ppm frequency stability.

IC Role / Device Role / Timing Role: Junction capacitance contributor in parallel with external load caps; provides predictable 10 pF offset.

Use Value: Stable 10 pF C_T at 1 V allows precise net load calculation without process variation penalty.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BAT54WS-7-F	V_F = 0.33 V min @ 10 mA; V_RRM = 30 V; t_RR = 5 ns; same SOD323 package	Higher forward drop at ≥10 mA makes it less optimal for sub-mA bias networks	Select when higher surge tolerance (I_FRM = 600 mA) is prioritized over ultra-low I_F efficiency.
SD103AWS-7-F	V_F = 0.45 V min @ 10 mA; V_RRM = 40 V; C_T = 15 pF; same SOD323 package	Higher reverse voltage rating suits 36 V industrial interfaces but adds 5 pF parasitic capacitance	Choose for 24–36 V systems where margin against transients outweighs RF bandwidth penalty.

Compared with BAT54WS-7-F and SD103AWS-7-F, BAT43WS-7-F delivers the lowest forward voltage at microamp-level currents - making it uniquely suited for battery-critical biasing and ultra-low-power clamping where every millivolt affects functional lifetime or signal fidelity.

Availability

BAT43WS-7-F is available at Aetrix Electronics and suitable for USB port protection, low-power sensor biasing, RF detector clamping, and crystal oscillator load matching requiring stable component supply across high-mix, low-volume production runs.

Supply support for BAT43WS-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 BAT4xWS series belongs to Diodes' precision Schottky diode product line, engineered specifically for ultra-low forward voltage and fast switching in space-constrained, low-power portable and automotive electronics.

FAQ

What is the maximum junction temperature for BAT43WS-7-F?

The BAT43WS-7-F has an operating junction temperature range of –55 °C to +125 °C. This rating is validated under specified thermal conditions using Diodes' recommended SOD323 pad layout on FR4. Exceeding +125 °C risks permanent degradation of the Schottky barrier and increased reverse leakage.

Is BAT43WS-7-F qualified for automotive use?

BAT43WS-7-F is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101, Diodes offers AEC-Q101-compliant variants (e.g., BAT43WSQ-7-F) with full stress test reports; this standard version is widely used in non-safety-critical automotive infotainment and body electronics.

How does BAT43WS-7-F differ from BAT42WS-7-F?

BAT43WS-7-F specifies a lower forward voltage (0.26–0.33 V @ 2.0 mA) than BAT42WS-7-F (0.40–0.65 V @ 10 mA), reflecting different metal-semiconductor barrier tuning. Both share identical V_RRM, package, and thermal specs, but BAT43WS targets ultra-low-current biasing while BAT42WS serves general-purpose rectification.

Can BAT43WS-7-F replace BAT54S in SOT-23 footprint designs?

No - BAT43WS-7-F uses SOD323 (1.30 mm × 1.70 mm), while BAT54S uses SOT-23 (2.9 mm × 1.3 mm). Though both are dual-anode Schottky configurations, their footprints, pinouts, and thermal profiles are incompatible. For SOT-23 replacement, consider BAT54SWT-7-F or similar SOT-23–packaged equivalents.

BAT43WS-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 30 V

Current - Average Rectified (Io):: 200mA

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 200 mA

Speed:: Small Signal =< 200mA (Io), Any Speed

Reverse Recovery Time (trr):: 5 ns

Current - Reverse Leakage @ Vr:: 500 nA @ 25 V

Capacitance @ Vr, F:: 10pF @ 1V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323

Operating Temperature - Junction:: -55°C ~ 125°C

BAT43WS-7-F FAQ

1.How can I place an order for BAT43WS-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BAT43WS-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 BAT43WS-7-F reliable?

The price and inventory of BAT43WS-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 BAT43WS-7-F is usually 5 days.

3.What payment methods are accepted for BAT43WS-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT43WS-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BAT43WS-7-F?

BAT43WS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BAT43WS-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 BAT43WS-7-F?

For technical support, including BAT43WS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT43WS-7-F requirements.

6.How does Aetrix verify that BAT43WS-7-F is sourced from the original manufacturer or authorized distributors?

All BAT43WS-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 BAT43WS-7-F meets industry standards.

7.What is the process for return or replacement of BAT43WS-7-F?

All BAT43WS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAT43WS-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 BAT43WS-7-F part is unused and in its original packaging.

Return procedure for BAT43WS-7-F:

1.Submit a request within 90 days.

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

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