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

Diodes Incorporated BAS20W-7-F

Name: BAS20W-7-F
Brand: Diodes Incorporated
SKU: BAS20W-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BAS20W-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: SC-70, SOT-323

Datasheet:: BAS20W-7-F.pdf

Description:: DIODE GEN PURP 150V 200MA SOT323

Quantity:: RFQ Add To RFQ list

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Inventory:1,723

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Product details

Overview

BAS20W-7-F from Diodes Incorporated is a surface-mount high-voltage switching diode in SOT323 package, rated for 200 V repetitive peak reverse voltage (V_RRM), 150 V DC blocking voltage (V_RWM), and 200 mA average rectified output current. It delivers fast 50 ns reverse recovery time (t_RR) and low 100 nA reverse leakage at 25°C, making it suitable for high-speed signal routing and voltage clamping in power supply feedback paths.

For engineers reviewing the BAS20W-7-F datasheet, BAS20W-7-F pinout, BAS20W-7-F application, or BAS20W-7-F equivalent, key selection criteria include its 200 V V_RRM, 50 ns t_RR, 1.25 V forward voltage at 200 mA, 5.0 pF junction capacitance at 0 V, and SOT323 thermal resistance of 625 °C/W - all critical for compact, high-frequency switching designs.

Technical Context

This diode operates as a unidirectional high-voltage switch with avalanche-rated junction structure, enabling reliable transient suppression in flyback snubbers and clamp circuits. Its 200 V V_RRM and 150 V V_RWM support operation across industrial 120 VAC-derived rails and automotive 24 V systems with margin.

The device uses an epitaxial planar construction with low-leakage diffusion profile, delivering 100 nA IR at 25°C and only 15 µA at 100°C - essential for low-power standby circuit integrity. Its 5.0 pF CT at 0 V and 1.0 MHz ensures minimal signal distortion in RF detector and sample-and-hold applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - supports 120 VAC line-derived circuits with ≥67% safety margin
V_RWM	150 V - maximum continuous DC blocking capability without breakdown
t_RR	50 ns - enables switching up to ~3 MHz without significant tail current loss
V_F	1.25 V @ 200 mA - limits conduction loss to ≤250 mW in series-switching configurations
I_O	200 mA - sufficient for bias networks, logic-level clamping, and low-current rectification
C_T	5.0 pF @ 0 V - preserves signal edge fidelity in <100 MHz analog detection paths
R_θJA	625 °C/W - requires minimal PCB copper area for thermal management in FR-4 layouts

Pinout & Package

Package: SOT323 - ultra-compact 3-pin surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), lead-free matte tin finish over Alloy 42 leadframe, moisture sensitivity level 1 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Forward current entry point	Connected to lower-potential node in clamping or rectifying configuration
Cathode (Pin 2)	Forward current exit / reverse voltage reference	Typically tied to rail or control node; defines polarity of blocking function
NC / Heat Sink Pad (Pin 3)	No internal connection	Exposed pad serves as mechanical anchor and optional thermal path; must remain floating or grounded per layout

Key Features

Feature	Design Value
Fast switching speed	50 ns reverse recovery time enables use in >1 MHz DC-DC converter snubbers and pulse shaping
High reverse breakdown voltage	200 V V_RRM allows direct integration into 120 VAC auxiliary supplies without external voltage dividers
Low reverse leakage	100 nA IR at 25°C maintains accuracy in precision voltage reference and sensor bias networks
SOT323 package compatibility	Standardized footprint supports automated placement and reflow on high-density PCBs with 0.65 mm pitch

Applications

Power Supply Clamp Circuit

Logic-Level Signal Clamping

Use Scenario: Protecting PWM controller inputs from inductive kickback in offline flyback converters.

IC Role / Device Role: Fast-recovery clamp diode shunting transient energy to ground during MOSFET turn-off.

Use Value: 50 ns t_RR and 200 V V_RRM prevent voltage overshoot beyond controller absolute max ratings.

Use Scenario: Limiting TTL/CMOS input voltage excursions in mixed-signal interface boards.

IC Role / Device Role: Bidirectional ESD protection and overvoltage clamp between digital ICs.

Use Value: 100 nA IR ensures no DC loading on high-impedance logic nodes; 5.0 pF CT avoids signal rise-time degradation.

Automotive Sensor Bias Network

RF Detector Peak Hold

Use Scenario: Providing stable bias current to Hall-effect sensors in 24 V vehicle subsystems.

IC Role / Device Role: Reverse-polarity protection and voltage regulation element in linear bias chain.

Use Value: 150 V V_RWM withstands load-dump transients; 15 µA IR at 100°C preserves calibration stability.

Use Scenario: Capturing peak amplitude of 433 MHz ISM-band RF signals in remote keyless entry receivers.

IC Role / Device Role: Low-capacitance envelope detector diode feeding sample-and-hold capacitor.

Use Value: 5.0 pF CT minimizes detuning of matching network; 1.25 V V_F enables accurate low-amplitude detection.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BAS21W-7-F	Higher 250 V V_RRM, 200 V V_RWM; otherwise identical SOT323 footprint and t_RR	Required where system transients exceed 200 V, e.g., 277 VAC lighting controls	Select when design margin demands >200 V blocking with unchanged layout
1N4148W-7-F	Lower 100 V V_RRM, higher 4.0 pF C_T, same 4 nA IR at 25°C	Suitable only for ≤50 V logic and signal paths; not rated for 120 VAC-derived rails	Choose only for cost-sensitive, low-voltage digital clamping where 200 V rating is unnecessary

Compared with BAS21W-7-F, BAS20W-7-F offers optimal balance of 200 V robustness and SOT323 size for 120 VAC auxiliary supplies; versus 1N4148W-7-F, it provides 2× higher voltage rating and 20% lower capacitance - critical for noise-sensitive analog front-ends.

Availability

BAS20W-7-F is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, and RF receiver front-ends requiring stable component supply and consistent parametric performance across production lots.

Supply support for BAS20W-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 BASxW series belongs to Diodes' high-voltage switching diode product line, engineered specifically for compact, high-reliability clamping and rectification in space-constrained AC/DC and DC/DC power conversion systems.

FAQ

What is the maximum operating temperature for BAS20W-7-F?

The device is rated for junction and storage temperatures from –55°C to +150°C. At ambient temperatures above 75°C, power dissipation must be derated linearly per Figure 1 in DS30118 - full 200 mW is allowed only below 25°C ambient, dropping to zero at 150°C.

Is BAS20W-7-F qualified for automotive applications?

No - BAS20W-7-F is a standard-qualification part. For automotive use, Diodes offers the AEC-Q101-qualified BAS21WQ variant, which undergoes additional stress testing and is manufactured in IATF 16949-certified facilities.

Can BAS20W-7-F replace 1N4148 in existing designs?

Only if the circuit requires ≥200 V blocking and can accommodate its higher forward voltage (1.25 V vs. 0.72 V for 1N4148 at 10 mA). In low-voltage logic clamping, 1N4148W-7-F remains preferable due to lower V_F and smaller leakage.

What is the meaning of the "-7-F" suffix in BAS20W-7-F?

The "-7-F" denotes tape-and-reel packaging: "7" indicates 3,000 units per reel, and "F" signifies lead-free, RoHS-compliant finish. This matches Diodes' standard ordering code convention for SOT323 devices.

BAS20W-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):: 150 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 @ 150 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

BAS20W-7-F FAQ

1.How can I place an order for BAS20W-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BAS20W-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 BAS20W-7-F reliable?

The price and inventory of BAS20W-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 BAS20W-7-F is usually 5 days.

3.What payment methods are accepted for BAS20W-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS20W-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BAS20W-7-F?

BAS20W-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BAS20W-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 BAS20W-7-F?

For technical support, including BAS20W-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS20W-7-F requirements.

6.How does Aetrix verify that BAS20W-7-F is sourced from the original manufacturer or authorized distributors?

All BAS20W-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 BAS20W-7-F meets industry standards.

7.What is the process for return or replacement of BAS20W-7-F?

All BAS20W-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAS20W-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 BAS20W-7-F part is unused and in its original packaging.

Return procedure for BAS20W-7-F:

1.Submit a request within 90 days.

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

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