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

Diodes Incorporated BAS20-7-F

Name: BAS20-7-F
Brand: Diodes Incorporated
SKU: BAS20-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BAS20-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: SOT-23-3 Flat Leads

Datasheet:: BAS20-7-F.pdf

Description:: DIODE GEN PURP 150V 200MA SOT23F

Quantity:: RFQ Add To RFQ list

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Inventory:2,471

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Product details

Overview

BAS20-7-F from Diodes Incorporated is a surface-mount fast-switching silicon switching diode rated for 200 V repetitive peak reverse voltage, 400 mA forward continuous current, and 50 ns reverse recovery time, used in high-speed signal routing, clamp protection, and low-power rectification circuits in consumer and industrial power management systems.

For engineers reviewing the BAS20-7-F datasheet, BAS20-7-F pinout, BAS20-7-F application, or BAS20-7-F equivalent, key selection criteria include its 200 V V_RRM, 1.25 V V_F @ 200 mA, 5.0 pF capacitance at 0 V, SOT23 package footprint, and suitability for automated assembly in space-constrained DC-DC converter feedback paths and logic-level clamping.

Technical Context

The BAS20-7-F is a single, planar-diffused silicon PN junction diode optimized for fast transient response and low forward conduction loss. Its 50 ns reverse recovery time (t_rr) and 5.0 pF junction capacitance support operation up to ~10 MHz in switching applications.

It operates across –55 °C to +150 °C with 250 mW power dissipation on FR-4 board (2 oz copper), and exhibits 100 nA reverse leakage at 150 V DC blocking voltage and 25 °C ambient - enabling stable performance in battery-powered sensor interfaces and low-noise analog front-ends.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - supports input surge clamping in 12–24 V DC systems without breakdown
V_F @ 200 mA	1.25 V - limits forward power loss to ≤250 mW in continuous conduction mode
t_rr	50 ns - enables clean edge transitions in 5–10 MHz digital signal conditioning
C_T @ 0 V	5.0 pF - minimizes capacitive loading on high-impedance nodes like op-amp inputs
I_R @ 150 V, 25°C	100 nA - ensures negligible leakage current in precision voltage reference bias networks
P_D	250 mW - defines maximum steady-state dissipation on standard PCB layout

Pinout & Package

Package: SOT23 - 3-terminal, surface-mount plastic package with 0.9 mm pitch, 2.4 mm × 1.3 mm footprint, and 0.008 g mass; compliant with J-STD-020 Level 1 moisture sensitivity and RoHS/lead-free requirements.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Forward current entry	Connected to higher-potential node during conduction; marked by device top-side dot or bevel
Cathode (Pin 2)	Forward current exit / reverse voltage terminal	Internally tied to package tab; electrically connected to PCB ground plane in thermal pad variants (not applicable here)
No-Connect (Pin 3)	Unused lead	Not bonded internally; left floating or grounded per layout best practice to reduce parasitic coupling

Key Features

Feature	Design Value
Fast switching speed	50 ns t_rr enables use in >5 MHz clock line clamping and pulse shaping
High conductance	Low dynamic resistance yields <1.25 V V_F at 200 mA, reducing I²R loss in portable power rails
SOT23 surface-mount package	Enables automated pick-and-place assembly and achieves 2.4 mm × 1.3 mm board area occupancy
Lead-free & RoHS 3 compliant	Meets EU Directive 2015/863/EU with <900 ppm Br/Cl and <1000 ppm Sb compounds

Applications

USB Port ESD Protection

DC-DC Converter Feedback Clamp

Use Scenario: Clamping transient voltages on USB D+ and D− lines during hot-plug events or ESD discharge.

IC Role / Device Role / Timing Role: Fast-switching diode providing low-capacitance (<5 pF), low-leakage (<100 nA) bidirectional clamping to ±5.5 V rails.

Use Value: Prevents damage to USB transceivers while maintaining signal integrity up to 480 Mbps due to minimal parasitic capacitance.

Use Scenario: Limiting feedback node voltage swing in isolated flyback or buck-boost converters with optocoupler-based regulation.

IC Role / Device Role / Timing Role: Clamp diode protecting TL431 or optocoupler input against overvoltage during startup or load transients.

Use Value: Ensures stable regulation by limiting feedback error voltage to ≤150 V, preventing latch-up of control ICs.

Logic-Level Signal Translation

Low-Power AC Signal Detection

Use Scenario: Level-shifting 3.3 V CMOS outputs to interface with 5 V microcontroller inputs in mixed-voltage systems.

IC Role / Device Role / Timing Role: Passive level translator using forward conduction to pass high states and reverse blocking to isolate low states.

Use Value: Achieves sub-50 ns propagation delay with no external bias required, supporting 10 MHz toggle rates.

Use Scenario: Demodulating low-amplitude AC signals (e.g., piezoelectric sensor outputs) into DC envelope for ADC sampling.

IC Role / Device Role / Timing Role: Precision half-wave rectifier operating at µA-level input currents with minimal forward voltage offset.

Use Value: Delivers accurate envelope detection down to 100 µV RMS input due to low 100 nA leakage and 1.25 V V_F consistency.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BAS21-7-F	Higher V_RRM = 250 V; identical t_rr, C_T, and package	Preferred where system transients exceed 200 V, e.g., 48 V industrial bus clamping	Select when long-term reliability under >200 V stress is required; same layout and drive circuitry
1N4148W-7-F	V_RRM = 100 V; t_rr = 4 ns (faster); C_T = 4 pF; same SOT23 package	Better suited for ultra-high-speed digital signal steering below 100 V	Choose only if reverse voltage stays ≤100 V and sub-10 ns switching is mandatory

Compared with BAS20-7-F, BAS21-7-F offers higher voltage margin without trade-offs in speed or footprint, while 1N4148W-7-F delivers faster recovery but sacrifices 50% reverse voltage rating - making BAS20-7-F the optimal balance for 12–24 V systems requiring robustness and speed.

Availability

BAS20-7-F is available at Aetrix Electronics and suitable for USB interface protection, DC-DC feedback clamping, and logic-level translation requiring stable component supply, consistent parametric performance, and full traceability from Diodes Incorporated's IATF 16949-certified facilities.

Supply support for BAS20-7-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 BAS series belongs to Diodes' general-purpose fast-switching diode product line, engineered specifically for high-reliability, high-volume automated assembly in consumer, computing, and industrial power management applications.

FAQ

What is the maximum junction temperature for BAS20-7-F?

The BAS20-7-F has an operating junction temperature range of –55 °C to +150 °C, verified per DS12004 Rev. 24. Its thermal resistance is 500 °C/W (junction-to-ambient, FR-4, 2 oz copper), meaning it reaches 150 °C junction at 250 mW dissipation with 25 °C ambient - consistent with derating curves in Figure 1 of the datasheet.

Is BAS20-7-F suitable for automotive applications?

No - the standard BAS20-7-F is not AEC-Q101 qualified. Only the BAS20Q-7-F variant meets automotive requirements, including PPAP capability and manufacturing in IATF 16949-certified facilities. The "Q" suffix denotes automotive-grade qualification; standard parts lack change control and extended reliability testing.

How does BAS20-7-F compare to BAS19-7-F in terms of voltage rating?

BAS20-7-F has a 200 V V_RRM and 150 V VRWM, versus BAS19-7-F's 120 V V_RRM and 100 V VRWM. Both share identical t_rr (50 ns), C_T (5.0 pF), and package (SOT23), making BAS20-7-F a direct upgrade for designs needing higher reverse standoff without layout changes.

Can BAS20-7-F be used in place of 1N4148 in SOT23 form factor?

Yes, mechanically - both use SOT23 - but electrically, BAS20-7-F offers higher V_RRM (200 V vs. 100 V) and lower leakage (100 nA vs. 25 nA at 20 V), while 1N4148W-7-F provides faster t_rr (4 ns). Use BAS20-7-F where voltage margin matters more than nanosecond-scale speed.

BAS20-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-23-3 Flat Leads

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-23F

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

BAS20-7-F FAQ

1.How can I place an order for BAS20-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BAS20-7-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 BAS20-7-F reliable?

The price and inventory of BAS20-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS20-7-F is usually 5 days.

3.What payment methods are accepted for BAS20-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS20-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BAS20-7-F?

BAS20-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BAS20-7-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 BAS20-7-F?

For technical support, including BAS20-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS20-7-F requirements.

6.How does Aetrix verify that BAS20-7-F is sourced from the original manufacturer or authorized distributors?

All BAS20-7-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 BAS20-7-F meets industry standards.

7.What is the process for return or replacement of BAS20-7-F?

All BAS20-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAS20-7-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 BAS20-7-F part is unused and in its original packaging.

Return procedure for BAS20-7-F:

1.Submit a request within 90 days.

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

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