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Diodes Incorporated BAS40-05-7-F
- Part No.:
- BAS40-05-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS40-05-7-F.pdf
- Description:
- DIODE ARR SCHOT 40V 200MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:11,644
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Product details
Overview
BAS40-05-7-F from Diodes Incorporated is a 40 V, 200 mA surface-mount Schottky barrier diode in SOT23 package, featuring 380 mV typical forward voltage at 1 mA, 5.0 ns reverse recovery time, and 200 nA max reverse leakage at 30 V - used for high-efficiency DC-DC converter freewheeling and low-voltage signal clamping.
For engineers reviewing the BAS40-05-7-F datasheet, BAS40-05-7-F pinout, BAS40-05-7-F application, or BAS40-05-7-F equivalent, key selection criteria include forward voltage drop under 1 mA–40 mA load, transient robustness via PN junction guard ring, thermal resistance of 357 °C/W on FR-4, and RoHS-compliant matte tin plating.
Technical Context
This Schottky diode employs a platinum-silicide (PtSi) or similar low-barrier metal-semiconductor junction to achieve sub-400 mV forward voltage at light current, enabling efficiency gains in 3.3 V and 5 V power rails. Its 5.0 ns trr supports switching frequencies up to ~30 MHz in flyback and buck converter snubbers.
The integrated PN junction guard ring provides ESD protection per IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) and suppresses transient-induced avalanche breakdown during inductive load switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 24 V system clamping and 36 V automotive input stages. |
| IF | 200 mA continuous - Sustained forward current rating; defines usable current range in low-power logic-level clamp and bias networks. |
| VF Max | 1000 mV @ 40 mA - Worst-case forward drop; determines conduction loss in 5 V supply rail OR-ing and USB port protection circuits. |
| IR Max | 200 nA @ 30 V - Maximum reverse leakage; ensures minimal standby current in battery-backed real-time clock backup paths. |
| trr | 5.0 ns - Reverse recovery time; enables clean commutation in >10 MHz PWM-driven synchronous rectifier auxiliary paths. |
| CT | 5.0 pF @ 0 V - Junction capacitance; limits high-frequency signal distortion in RF detector and mixer bias applications. |
| RθJA | 357 °C/W - Thermal resistance on FR-4 board; dictates derating above 70 °C ambient in sealed industrial sensor modules. |
Pinout & Package
Package: SOT23 (Standard), molded plastic, UL 94V-0 rated, 0.008 g mass, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry | Connected to higher-potential node in clamping or freewheeling path; requires thermal relief pad for solder joint reliability. |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Typically tied to ground or low-side switch node; polarity must match PCB silkscreen marking "K" or band. |
| No Connection (Pin 3) | Internal die attach flag | Electrically isolated; serves mechanical anchoring only - must not be routed or connected in layout. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 380 mV typical at 1 mA - reduces power loss by ≥40% vs. standard silicon diodes in always-on bias networks. |
| Fast switching | 5.0 ns reverse recovery - eliminates tail current in 20+ MHz PWM control loops without external snubbers. |
| PN junction guard ring | Integrated ESD/Transient protection - withstands ±8 kV contact discharge without parameter shift or failure. |
| Green construction | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - meets IPC-1752A Class 2 reporting requirements. |
| Lead-free plating | Matte tin over Alloy 42 leadframe - compatible with Pb-free reflow profiles (peak 260 °C) and MIL-STD-202 solderability. |
Applications
| USB Port Protection | DC-DC Converter Freewheeling |
|---|---|
Use Scenario: Preventing backfeed from downstream USB peripherals into host VBUS during hot-plug events. IC Role / Device Role / Timing Role: Unidirectional blocking diode placed between host VBUS and peripheral VBUS lines. Use Value: 380 mV VF minimizes voltage drop across protection path, preserving 4.75–5.25 V compliance at 200 mA load. |
Use Scenario: Providing low-loss return path for inductor current during high-side MOSFET off-time in buck converters. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in non-synchronous designs operating at 500 kHz–2 MHz. Use Value: 5.0 ns trr prevents cross-conduction losses and ringing during 100 ns dead-time intervals. |
| Logic-Level Signal Clamping | Automotive Sensor Bias Network |
Use Scenario: Limiting microcontroller GPIO voltage excursions beyond supply rails during ESD transients. IC Role / Device Role / Timing Role: Rail-to-rail clamp diode connected between I/O pin and VCC/GND. Use Value: 200 nA IR at 3.3 V ensures negligible leakage impact on high-impedance analog sensor inputs. |
Use Scenario: Biasing Hall-effect or thermistor sensors in engine control units exposed to -40 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Reverse-polarity protection and supply decoupling element in 5 V sensor supply chain. Use Value: AEC-Q101 qualified variant (BAS40-05Q-7-F) guarantees parametric stability over full automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR0540T1G | Higher IF (500 mA), larger SOT-23-3 footprint, 450 mV VF @ 100 mA | Preferred for 300–500 mA DC-DC outputs where thermal margin is critical | Select when forward current exceeds 200 mA or board space allows larger thermal pad |
| NSR0230HT1G | Lower VF (270 mV @ 10 mA), same SOT-23, 100 nA IR @ 30 V | Better suited for ultra-low-power IoT sensor bias where leakage dominates battery drain | Choose when standby current <100 nA is mandatory and 40 V VRRM remains sufficient |
Compared with MBR0540T1G and NSR0230HT1G, BAS40-05-7-F delivers optimal balance of low-light-load VF, tight leakage control, and compact SOT23 footprint - making it ideal for space-constrained 200 mA applications where thermal and ESD robustness are prioritized over peak current capability.
Availability
BAS40-05-7-F is available at Aetrix Electronics and suitable for USB protection, DC-DC converter freewheeling, and logic-level clamping requiring stable component supply across industrial, computing, and automotive design cycles.
Supply support for BAS40-05-7-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 centers across Asia and manufacturing in ASE, Amkor, and its own facilities.
The BAS40 series belongs to Diodes' general-purpose Schottky diode product line, engineered for high-efficiency power management and signal integrity in cost-sensitive, high-volume consumer and industrial applications.
FAQ
What is the maximum junction temperature for BAS40-05-7-F?
The absolute maximum junction temperature is +125 °C, with operation permitted from –55 °C to +125 °C. Derating begins at +70 °C ambient per the published power derating curve: PD = 350 mW × (1 − (TA − 25)/100). At 100 °C ambient, maximum dissipation drops to 105 mW.
Is BAS40-05-7-F suitable for automotive applications?
The standard BAS40-05-7-F is not AEC-Q101 qualified; however, the functionally identical BAS40-05Q-7-F variant is fully AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949-certified facilities - required for under-hood and safety-critical automotive use.
How does the PN junction guard ring improve reliability?
The guard ring surrounds the active Schottky junction to distribute electric field stress during voltage transients, preventing localized avalanche and reducing ESD-induced parameter drift. It enables reliable operation under IEC 61000-4-2 Level 4 (±8 kV contact) without external TVS devices.
What is the recommended PCB pad layout for SOT23 mounting?
Diodes recommends a pad layout with dimensions C = 2.0 × 0.8 mm, X1 = 1.35 mm, Y = 0.9 mm, and Y1 = 2.9 mm - optimized for thermal performance and solder joint integrity. Full details and Gerber templates are available at diodes.com/package-outlines.html.
BAS40-05-7-F 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:
- Active
- 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-F FAQ
1.How can I place an order for BAS40-05-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40-05-7-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 BAS40-05-7-F reliable?
The price and inventory of BAS40-05-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40-05-7-F is usually 5 days.
3.What payment methods are accepted for BAS40-05-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40-05-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40-05-7-F?
BAS40-05-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40-05-7-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 BAS40-05-7-F?
For technical support, including BAS40-05-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40-05-7-F requirements.
6.How does Aetrix verify that BAS40-05-7-F is sourced from the original manufacturer or authorized distributors?
All BAS40-05-7-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 BAS40-05-7-F meets industry standards.
7.What is the process for return or replacement of BAS40-05-7-F?
All BAS40-05-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAS40-05-7-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 BAS40-05-7-F part is unused and in its original packaging.
Return procedure for BAS40-05-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS40-05-7-F Tags
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BAV99-7-F
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