My Inquiry
My Account
Diodes Incorporated BAS40W-04-7
- Part No.:
- BAS40W-04-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAS40W-04-7.pdf
- Description:
- DIODE ARR SCHOT 40V 200MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,155
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BAS40W-04-7 from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT323 package, rated for 40 V peak repetitive reverse voltage, 200 mA forward current, and 5.0 ns reverse recovery time. It delivers low forward voltage drop (380 mV @ 1 mA), ultra-fast switching, and integrated PN junction guard ring for ESD/transient protection - deployed in high-frequency DC-DC converter output rectification and signal clamping circuits.
For engineers reviewing the BAS40W-04-7 datasheet, BAS40W-04-7 pinout, BAS40W-04-7 application, or BAS40W-04-7 equivalent, key selection criteria include its 40 V VRRM rating, sub-1 V VF at 40 mA, 5.0 ns trr, 5.0 pF CT at 0 V, and SOT323 thermal resistance of 625 °C/W - all critical for compact power management and RF signal path designs.
Technical Context
This Schottky diode uses a planar epitaxial construction with a PN junction guard ring to suppress edge breakdown and improve transient robustness. Its low barrier height enables fast carrier injection/extraction, yielding 5.0 ns reverse recovery time under standardized 10 mA IF/IR test conditions.
The device operates across –55 °C to +125 °C junction temperature range and dissipates up to 200 mW on FR4 PCB with recommended pad layout. Thermal resistance of 625 °C/W (Junction-to-Ambient) reflects its ultra-small SOT323 footprint and limited copper thermal spreading capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage before avalanche conduction begins; defines safe DC/peak AC voltage margin in rectifier and clamp roles. |
| VF @ 1 mA | 380 mV - Low forward drop minimizes conduction loss in low-current bias and sensing paths; enables efficient signal-level clamping. |
| VF @ 40 mA | 1000 mV - Confirmed forward voltage under moderate load; supports estimation of I²R losses in 200 mA-rated switching applications. |
| trr | 5.0 ns - Ultra-fast recovery enables use in >10 MHz switching converters and RF detector circuits without tail current distortion. |
| CT @ 0 V | 5.0 pF - Low junction capacitance preserves high-frequency signal integrity in mixer, limiter, and sampling applications. |
| IR @ 30 V | 200 nA - Low leakage ensures minimal standby current in battery-powered logic clamps and precision reference protection networks. |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount package (2.0 × 2.225 × 0.9 mm), lead-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node in rectifier/clamp; polarity marked by cathode band on package top view. |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Connected to lower-potential node; carries full reverse voltage during off-state; tied to ground or return path in clamping. |
| NC (Pin 3) | No connection | Internally unconnected; electrically isolated; must not be soldered or biased to avoid parasitic coupling or mechanical stress. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 380 mV @ 1 mA - reduces power loss and self-heating in space-constrained portable and IoT power rails. |
| Ultra-fast switching | 5.0 ns reverse recovery - enables clean waveform fidelity in 10–50 MHz RF envelope detection and high-frequency DC-DC sync rectification. |
| PN junction guard ring | Integrated edge termination - improves ESD robustness (IEC61000-4-2 Level 4 compliant per design intent) and transient immunity in noisy industrial interfaces. |
| SOT323 package | 0.006 g mass, 2.0 × 2.225 mm footprint - supports high-density PCB layouts in wearables, sensor nodes, and miniaturized power modules. |
Applications
| High-Frequency DC-DC Converter Output Rectification | RF Signal Limiter / Detector |
|---|---|
Use Scenario: Used as synchronous rectifier or freewheeling diode in 1–5 MHz buck converters powering FPGA core rails or PMIC outputs. IC Role / Device Role: Low-loss unidirectional current path with minimal reverse recovery charge; replaces larger Schottkys where board area is constrained. Use Value: 380 mV VF at light load cuts conduction loss by ~35% vs. standard silicon diodes, directly improving efficiency in <1 A output stages. |
Use Scenario: Front-end limiter in 900 MHz ISM-band receiver chains, protecting LNA input from antenna-coupled transients. IC Role / Device Role: Fast-turn-on clamp limiting peak RF voltage to ±0.4 V; exploits low CT (5.0 pF) to preserve impedance match up to 2 GHz. Use Value: 5.0 ns trr prevents signal distortion during burst-mode reception; guard ring sustains >8 kV HBM ESD without parameter shift. |
| Logic-Level Signal Clamping | Low-Power Voltage Reference Protection |
Use Scenario: Clamp I²C/SPI data lines to 3.3 V rail in microcontroller peripherals exposed to ESD-prone connectors. IC Role / Device Role: Bidirectional transient suppressor using dual diode configuration (anode-to-rail, cathode-to-ground); leverages low IR (200 nA). Use Value: Sub-μA leakage avoids loading weak pull-ups; 40 V VRRM allows safe operation with 5 V tolerant IO even under overshoot conditions. |
Use Scenario: Protecting precision bandgap references (e.g., REF3033) from accidental reverse-bias or overvoltage events in sensor signal conditioning. IC Role / Device Role: Reverse-polarity and overvoltage shunt; placed between reference output and downstream op-amp inputs. Use Value: 380 mV forward drop ensures clamping occurs before reference damage threshold (~0.5 V reverse); guard ring prevents latch-up during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | 30 V VRRM, 200 mA IF, 0.45 V VF @ 1 mA, SOD-323 package | Lower voltage rating limits use in 36 V systems; smaller die yields lower CT (3.5 pF) but reduced surge tolerance | Select when operating below 30 V and prioritizing lowest possible capacitance in RF front-ends |
| RB521S-30T2R | 30 V VRRM, 200 mA IF, 0.35 V VF @ 1 mA, SOD-523 package | Smaller SOD-523 footprint (1.2 × 0.8 mm) but no guard ring; IR = 100 nA @ 25 V | Prefer for ultra-dense layouts where ESD exposure is controlled and reverse voltage stays ≤25 V |
Compared with NSR0230HT1G and RB521S-30T2R, BAS40W-04-7 provides higher 40 V blocking margin and integrated guard ring for field-deployed industrial interfaces - trading slight VF increase for robustness in uncontrolled ESD environments.
Availability
BAS40W-04-7 is available at Aetrix Electronics and suitable for high-frequency DC-DC converter output rectification, RF signal limiting, and logic-level signal clamping requiring stable component supply and long-term production continuity.
Supply support for BAS40W-04-7 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 China, Taiwan, and the U.S.
BAS40W-04-7 belongs to Diodes' general-purpose Schottky diode product line, engineered for high-speed, low-loss performance in space-constrained power and signal integrity applications - especially where ESD resilience and thermal efficiency are critical.
FAQ
What is the maximum junction temperature for continuous operation?
The BAS40W-04-7 has a specified operating junction temperature range of –55 °C to +125 °C. Continuous operation at +125 °C requires derating power dissipation per the published curve: at 100 °C ambient, maximum PD drops to ~120 mW. Thermal design must account for SOT323's 625 °C/W RθJA on standard FR4.
Is BAS40W-04-7 pin-compatible with BAS40W-05-7 or BAS40W-06-7?
Yes - all variants (BAS40W-04-7, -05-7, -06-7) share identical SOT323 package, pinout, and mechanical dimensions. They differ only in electrical grading: -04 is 40 V VRRM, -05 is 50 V, and -06 is 60 V. No layout change is needed when upgrading voltage rating within the same footprint.
Does this diode require special PCB layout considerations?
Yes - Diodes Incorporated specifies a recommended SOT323 pad layout (C = 0.65 mm, G = 1.30 mm, X = 0.47 mm, Y = 0.60 mm) to ensure reliable solder joint formation and optimal thermal conduction. Use of non-recommended pads may degrade power handling and increase risk of tombstoning during reflow.
How does the PN junction guard ring affect ESD performance?
The integrated guard ring suppresses edge breakdown, raising the effective ESD withstand voltage. While not explicitly rated per IEC 61000-4-2 in the datasheet, the structure enables typical HBM ratings ≥8 kV - verified in application testing - making it suitable for unprotected I/O lines in industrial control panels and sensor nodes.
BAS40W-04-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Diode Configuration:
- 1 Pair Series Connection
- 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-323
BAS40W-04-7 FAQ
1.How can I place an order for BAS40W-04-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40W-04-7 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 BAS40W-04-7 reliable?
The price and inventory of BAS40W-04-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40W-04-7 is usually 5 days.
3.What payment methods are accepted for BAS40W-04-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40W-04-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40W-04-7?
BAS40W-04-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40W-04-7 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 BAS40W-04-7?
For technical support, including BAS40W-04-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40W-04-7 requirements.
6.How does Aetrix verify that BAS40W-04-7 is sourced from the original manufacturer or authorized distributors?
All BAS40W-04-7 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 BAS40W-04-7 meets industry standards.
7.What is the process for return or replacement of BAS40W-04-7?
All BAS40W-04-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAS40W-04-7, 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 BAS40W-04-7 part is unused and in its original packaging.
Return procedure for BAS40W-04-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS40W-04-7 Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
