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

Diodes Incorporated BAS19W-7-F

Name: BAS19W-7-F
Brand: Diodes Incorporated
SKU: BAS19W-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BAS19W-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: SC-70, SOT-323

Datasheet:: BAS19W-7-F.pdf

Description:: DIODE GEN PURP 100V 200MA SOT323

Quantity:: RFQ Add To RFQ list

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Inventory:6,242

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Product details

Overview

BAS19W-7-F from Diodes Incorporated is a surface-mount high-voltage fast-switching diode in SOT323 package, rated for 120 V repetitive peak reverse voltage (V_RRM), 100 V DC blocking voltage (V_RWM), and 200 mA average rectified current (I_O). It delivers 50 ns reverse recovery time (t_RR) and 5.0 pF junction capacitance at 0 V, suited for signal-level switching in compact power management and interface circuits.

For engineers reviewing the BAS19W-7-F datasheet, BAS19W-7-F pinout, BAS19W-7-F application, or BAS19W-7-F equivalent, this part serves as a lead-free, RoHS-compliant general-purpose switching diode with verified thermal resistance (625 °C/W), low forward voltage (1.25 V @ 200 mA), and automotive-qualified variants available under separate documentation.

Technical Context

The BAS19W-7-F is a silicon planar epitaxial PN-junction diode optimized for high-speed switching in space-constrained designs. Its 120 V V_RRM and 100 V V_RWM support use in 48 V and 100 V rail monitoring, while its 50 ns t_RR enables operation in pulse-width modulation and digital logic clamping circuits up to ~10 MHz.

Thermally, it dissipates 200 mW at 25°C ambient with R_θJA = 625 °C/W on FR-4 PCBs using minimum recommended pad layout. Reverse leakage remains ≤100 nA at 25°C and ≤15 µA at 100°C, ensuring stable performance across industrial temperature range (–55°C to +150°C).

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	120 V - supports switching in 48 V systems with 2.5× safety margin
V_RWM	100 V - maximum continuous DC reverse voltage before breakdown
I_O	200 mA - average forward current capability with derating above 25°C
t_RR	50 ns - enables clean edge transitions in digital signal routing and clamp circuits
C_T	5.0 pF @ 0 V - low capacitance preserves signal integrity in RF and high-speed data lines
V_F	1.25 V @ 200 mA - low conduction loss in low-power switching paths
R_θJA	625 °C/W - requires minimal copper area for thermal management on standard FR-4

Pinout & Package

Package: SOT323 - ultra-small surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), moisture sensitivity level 1, lead-free matte tin plating over Alloy 42 leadframe.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Forward current entry point	Connected to lower-potential node in reverse-biased protection or forward-biased switching path
Cathode (Pin 2)	Forward current exit / reverse voltage reference	Typically tied to ground or higher-potential rail; defines polarity for clamping and rectification
Case / Heat Sink (Pin 3)	Non-electrical mechanical connection	Exposed metal tab not internally connected; provides mechanical stability but no thermal or electrical function

Key Features

Feature	Design Value
Fast switching speed	50 ns reverse recovery time enables reliable operation in 10 MHz digital signal conditioning
High reverse breakdown voltage	120 V V_RRM allows use in 48 V industrial bus monitoring without external voltage dividers
SOT323 surface-mount package	0.006 g weight and 2.15 mm × 2.10 mm footprint supports high-density PCB layouts
Lead-free & RoHS compliant	Fully compliant with EU Directive 2015/863/EU; no intentionally added lead, halogen, or antimony

Applications

Power Supply Clamp

Digital Logic Protection

Use Scenario: Clamping transient spikes on 48 V DC input rails of industrial PLC modules.

IC Role / Device Role / Timing Role: Fast-recovery diode placed anode-to-rail, cathode-to-3.3 V reference, conducting only during overvoltage events.

Use Value: 120 V V_RRM and 50 ns t_RR prevent latch-up while limiting overshoot to <3.6 V.

Use Scenario: Protecting GPIO pins of microcontrollers against ESD and I/O voltage excursions.

IC Role / Device Role / Timing Role: Bidirectional clamping diode between I/O line and V_DD/GND rails in series with current-limiting resistor.

Use Value: 5.0 pF C_T avoids signal distortion on 10 MHz SPI clock lines; 100 nA I_R minimizes standby leakage.

Signal-Level Rectification

Level Translation Interface

Use Scenario: Peak detection in analog sensor signal conditioning for temperature or pressure transducers.

IC Role / Device Role / Timing Role: Low-capacitance rectifier in precision half-wave detector feeding op-amp integrator.

Use Value: 1.25 V V_F at 200 mA ensures minimal forward drop error in sub-100 µA signal paths.

Use Scenario: Voltage-level shifting between 5 V legacy peripherals and 3.3 V MCU I/O banks.

IC Role / Device Role / Timing Role: Forward-biased diode in series with pull-up to translate logic HIGH from 5 V to ~4.3 V.

Use Value: Predictable 1.25 V V_F enables accurate offset setting without trimming resistors.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage fast-switching diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BAS20W-7-F	200 V V_RRM, 150 V V_RWM, same SOT323 package and t_RR	Supports higher-voltage rails (e.g., 72 V telecom) but higher V_F (1.25 V @ 200 mA same)	Select when system reverse stress exceeds 100 V but thermal budget remains constrained
1N4148W-7-F	100 V V_RRM, 75 V V_RWM, identical SOT323, 4 ns faster t_RR (46 ns)	Better for <5 MHz digital clamping; lower voltage rating limits 48 V surge margin	Prefer where speed dominates over voltage margin, e.g., low-voltage FPGA I/O protection

Compared with BAS20W-7-F and 1N4148W-7-F, the BAS19W-7-F offers optimal balance of 120 V standoff, 50 ns switching, and 200 mA current handling in the smallest SOT323 footprint-ideal for 48 V industrial interfaces where both voltage margin and board area are critical.

Availability

BAS19W-7-F is available at Aetrix Electronics and suitable for industrial power supply clamp circuits, digital I/O protection, analog signal rectification, and level translation interfaces requiring stable component supply and full RoHS compliance.

Supply support for BAS19W-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 North America.

The BAS19W series belongs to Diodes' general-purpose high-voltage switching diode product line, engineered for reliability in automated SMT assembly and performance-critical signal routing in industrial, computing, and communications equipment.

FAQ

What is the maximum operating temperature for BAS19W-7-F?

The BAS19W-7-F is rated for junction and storage temperatures from –55°C to +150°C. Its thermal resistance (R_θJA = 625 °C/W) means that at 200 mW dissipation and 25°C ambient, junction temperature reaches 150°C - the absolute maximum. Derating is required above 25°C per Figure 1 in DS30118.

Is BAS19W-7-F suitable for automotive applications?

The standard BAS19W-7-F is not AEC-Q101 qualified. However, Diodes offers the automotive-compliant BAS21WQ variant (separate datasheet) with AEC-Q101 qualification, PPAP capability, and IATF 16949 manufacturing. For automotive use, specify the Q-grade part number and consult Diodes' automotive product definitions page.

How does the SOT323 package affect thermal performance?

The SOT323 package limits thermal dissipation to 200 mW at 25°C ambient due to its small size and R_θJA of 625 °C/W. Effective thermal management requires adherence to Diodes' recommended pad layout (0.47 mm × 0.60 mm solder pads, 2.5 mm thermal relief extension) and avoiding enclosed enclosures or adjacent heat sources.

Can BAS19W-7-F replace 1N4148 in existing designs?

Yes, in most cases - both are SOT323 fast-switching diodes. However, BAS19W-7-F has higher V_RRM (120 V vs. 100 V) and slightly higher V_F (1.25 V @ 200 mA vs. 1.0 V @ 10 mA), making it preferable for 48 V systems but less ideal for low-current, low-drop applications. Verify reverse leakage and capacitance impact in high-impedance nodes.

BAS19W-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io):: 200mA

Voltage - Forward (Vf) (Max) @ If:: 1.25 V @ 200 mA

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

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 100 nA @ 100 V

Capacitance @ Vr, F:: 5pF @ 0V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323

Operating Temperature - Junction:: -65°C ~ 150°C

BAS19W-7-F FAQ

1.How can I place an order for BAS19W-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BAS19W-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 BAS19W-7-F reliable?

The price and inventory of BAS19W-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 BAS19W-7-F is usually 5 days.

3.What payment methods are accepted for BAS19W-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS19W-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BAS19W-7-F?

BAS19W-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BAS19W-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 BAS19W-7-F?

For technical support, including BAS19W-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS19W-7-F requirements.

6.How does Aetrix verify that BAS19W-7-F is sourced from the original manufacturer or authorized distributors?

All BAS19W-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 BAS19W-7-F meets industry standards.

7.What is the process for return or replacement of BAS19W-7-F?

All BAS19W-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAS19W-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 BAS19W-7-F part is unused and in its original packaging.

Return procedure for BAS19W-7-F:

1.Submit a request within 90 days.

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

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