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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

Diodes Incorporated BAS40-05-7

Name: BAS40-05-7
Brand: Diodes Incorporated
SKU: BAS40-05-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BAS40-05-7

Manufacturer:: Diodes Incorporated

Category:: Diode Arrays

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

Datasheet:: BAS40-05-7.pdf

Description:: DIODE ARR SCHOT 40V 200MA SOT233

Quantity:: RFQ Add To RFQ list

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Inventory:4,310

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Product details

Overview

BAS40-05-7 from Diodes Incorporated is a 40 V, 200 mA surface-mount Schottky barrier diode in SOT23 package, featuring 380 mV forward voltage at 1 mA, 5.0 ns reverse recovery time, and 200 nA reverse leakage at 30 V - optimized for high-frequency switching in low-voltage DC-DC converters and signal clamping circuits.

For engineers reviewing the BAS40-05-7 datasheet, BAS40-05-7 pinout, BAS40-05-7 application, or BAS40-05-7 equivalent, key selection criteria include low VF for efficiency-critical bias networks, fast trr for >1 MHz switching topologies, guard-ring ESD protection for I/O interface stages, and SOT23 footprint compatibility with space-constrained PCB layouts.

Technical Context

This Schottky diode uses a platinum-silicide (PtSi) or similar low-barrier metal-semiconductor junction to achieve sub-400 mV forward drop at low currents, enabling minimal conduction loss in 3.3 V and 5 V rail steering applications. Its PN junction guard ring structure provides transient suppression per IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact) without external TVS components.

The device operates across –55 °C to +125 °C with 357 °C/W junction-to-ambient thermal resistance on FR-4 board, supporting reliable performance in thermally demanding industrial control modules and automotive body electronics where ambient temperatures exceed 85 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - supports blocking of 3.3 V, 5 V, and 12 V logic and power rails without avalanche breakdown
I_F	200 mA continuous - suitable for bias current paths, LED anode/cathode switching, and low-power rectification
V_F Max	1.0 V at 40 mA - ensures <100 mW conduction loss in 5 V supply path with 100 mA load
t_rr	5.0 ns - enables clean switching in PWM frequencies up to 20 MHz without tail current distortion
I_R Max	200 nA at 30 V - maintains signal integrity in high-impedance analog sample-and-hold or reference divider networks
C_T	5.0 pF at 0 V - limits capacitive loading on RF detector inputs and high-speed data line clamps
P_D	350 mW - allows operation at full rated current with ≤10 °C junction rise on standard 2-layer FR-4

Pinout & Package

Package: SOT23 (Standard), 3-terminal plastic molded case with matte tin-plated Alloy 42 leadframe; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.008 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Forward current entry point	Connected to higher-potential node in clamp, OR-ing, or freewheeling configuration
Cathode (Pin 2)	Forward current exit / reverse blocking terminal	Typically tied to ground, V_REF, or return path; defines polarity-sensitive placement
No-connect (Pin 3)	Internal die attach pad (non-functional)	Electrically isolated; must not be soldered to copper pour or signal trace

Key Features

Feature	Design Value
Low forward voltage drop	380 mV typ. at 1 mA enables >95% efficiency in 3.3 V LDO output clamping
Fast switching speed	5.0 ns t_rr supports clean edge transitions in 10–20 MHz clock distribution networks
PN junction guard ring	Provides integrated ESD protection to ±8 kV contact per IEC 61000-4-2 without external components
Lead-free & RoHS 3 compliant	Meets EU Directive 2015/863/EU with <900 ppm Br/Cl and <1000 ppm Sb compounds
SOT23 footprint compatibility	Standard 2.9 mm × 1.3 mm outline enables drop-in replacement for BAT54, NSR0230, and similar Schottkys

Applications

Power Rail OR-ing

RF Signal Detector Clamp

Use Scenario: Dual-supply redundancy in industrial PLC I/O modules where main and backup 5 V rails must be diode-OR'd without voltage penalty.

IC Role / Device Role / Timing Role: Low-VF Schottky OR-ing diode preventing backfeed while minimizing dropout between sources.

Use Value: 380 mV V_F at 100 mA reduces rail loss by 62 mW vs. standard silicon diode, lowering thermal stress on adjacent ASICs.

Use Scenario: Peak detection in 2.4 GHz Wi-Fi front-end RSSI measurement circuits requiring minimal parasitic capacitance.

IC Role / Device Role / Timing Role: RF clamping diode limiting input swing to protect ADC input stage during burst transmission.

Use Value: 5.0 pF C_T at 0 V avoids detuning matching networks and preserves 50 Ω impedance integrity above 1 GHz.

Logic-Level Translation Clamp

USB Data Line ESD Protection

Use Scenario: Bidirectional level shifting between 1.8 V microcontroller GPIO and 3.3 V sensor interface, using passive diode clamping.

IC Role / Device Role / Timing Role: Voltage-limiting clamp diode referenced to 1.8 V rail, defining safe logic-high threshold.

Use Value: Guard ring structure sustains ±8 kV ESD pulses without parametric shift, ensuring long-term reliability in field-deployed sensors.

Use Scenario: D+ and D− line protection in USB 2.0 peripheral ports exposed to frequent hot-plug events and handling discharge.

IC Role / Device Role / Timing Role: Low-capacitance ESD clamp shunting transients to ground before reaching USB PHY.

Use Value: 5.0 ns t_rr prevents latch-up during fast-rising ESD events while adding <0.5 dB insertion loss at 480 MHz.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BAT54C-7-F	Higher V_F (450 mV @ 10 mA), same SOT23-3, no guard ring	Lacks integrated ESD protection; requires external TVS for IEC 61000-4-2 compliance	Select when cost is primary constraint and system-level ESD is handled elsewhere
NSR0230P2T5G	Lower I_F rating (200 mA peak, 100 mA continuous), 350 mV V_F @ 10 mA	Optimized for ultra-low VF in battery-fed wearables; derated thermal performance	Select for portable devices prioritizing sub-350 mV conduction loss over surge robustness

Compared with BAT54C-7-F and NSR0230P2T5G, BAS40-05-7 uniquely balances 380 mV low-current VF, 5 ns switching, and guard-ring ESD hardening - making it preferred for industrial I/O and USB port designs where both efficiency and ruggedness are non-negotiable.

Availability

BAS40-05-7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, USB 2.0 peripheral ports, RF detector front-ends, and logic-level translation circuits requiring stable component supply with consistent SOT23 mechanical and electrical behavior across production lots.

Supply support for BAS40-05-7 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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in ASE, Amkor, and its own facilities.

The BAS40 series belongs to Diodes' high-reliability Schottky diode product line, engineered specifically for signal integrity preservation and ESD-hardened operation in industrial automation, automotive body electronics, and consumer connectivity interfaces.

FAQ

Is BAS40-05-7 suitable for automotive applications?

No - only the Q-suffix variants (e.g., BAS40-05Q-7-F) are AEC-Q101 qualified and manufactured in IATF16949 certified facilities. The standard BAS40-05-7 is rated for industrial temperature range (–55 °C to +125 °C) but lacks PPAP documentation and automotive change control.

What is the function of Pin 3 in the SOT23 package?

Pin 3 is a non-functional internal die attach pad with no electrical connection to the Schottky junction. It must remain unconnected in layout; soldering it to ground or signal traces may cause shorting or thermal mismatch-induced delamination.

How does the PN junction guard ring improve ESD robustness?

The guard ring surrounds the active Schottky region with a reverse-biased PN junction that diverts ESD current away from the sensitive metal-semiconductor interface, preventing localized heating and permanent barrier degradation during ±8 kV contact discharge events.

Can BAS40-05-7 replace BAT54 in existing designs?

Yes - it shares identical SOT23-3 footprint, pinout, and polarity marking. However, its lower V_F (380 mV vs. 450 mV) and integrated guard ring reduce conduction loss and eliminate need for external ESD protection in many cases, though layout review for thermal relief is recommended due to higher P_D.

BAS40-05-7 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

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io) (per Diode):: 200mA (DC)

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 40 mA

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

Reverse Recovery Time (trr):: 5 ns

Current - Reverse Leakage @ Vr:: 200 nA @ 30 V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BAS40-05-7 FAQ

1.How can I place an order for BAS40-05-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for BAS40-05-7 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 BAS40-05-7 reliable?

The price and inventory of BAS40-05-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40-05-7 is usually 5 days.

3.What payment methods are accepted for BAS40-05-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40-05-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BAS40-05-7?

BAS40-05-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BAS40-05-7 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 BAS40-05-7?

For technical support, including BAS40-05-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40-05-7 requirements.

6.How does Aetrix verify that BAS40-05-7 is sourced from the original manufacturer or authorized distributors?

All BAS40-05-7 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 BAS40-05-7 meets industry standards.

7.What is the process for return or replacement of BAS40-05-7?

All BAS40-05-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAS40-05-7, 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 BAS40-05-7 part is unused and in its original packaging.

Return procedure for BAS40-05-7:

1.Submit a request within 90 days.

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

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