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Diodes Incorporated BAS40-04-7
- Part No.:
- BAS40-04-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS40-04-7.pdf
- Description:
- DIODE ARR SCHOT 40V 200MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:2,678
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Product details
Overview
BAS40-04-7 from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT23 package, rated for 40 V peak reverse voltage and 200 mA forward current, with max 1.0 V forward voltage at 40 mA and 0.2 µA reverse leakage at 30 V, used in high-efficiency DC-DC converter output rectification and low-voltage signal clamping.
For engineers reviewing the BAS40-04-7 datasheet, BAS40-04-7 pinout, BAS40-04-7 application, or BAS40-04-7 equivalent, key selection criteria include low VF for power loss reduction, fast trr ≤ 5.0 ns for high-frequency switching, guard-ring ESD protection, and SOT23 footprint compatibility with space-constrained PCB layouts.
Technical Context
This Schottky diode uses a platinum-silicide or similar low-barrier metal-semiconductor junction to achieve forward voltage as low as 380 mV (typ.) at 1 mA and ≤1.0 V at 40 mA, enabling higher efficiency than standard PN diodes in low-voltage power rails. Its 5.0 ns reverse recovery time supports operation up to ~100 MHz in RF detector and sampling applications.
The integrated PN junction guard ring provides transient suppression and ESD robustness per IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact), while the SOT23 package delivers thermal resistance of 357°C/W and operates from –55°C to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum blocking voltage before avalanche; suitable for 3.3 V/5 V/12 V rail clamping and flyback snubbing |
| IF | 200 mA continuous - Supports moderate-current power path rectification without derating below 85°C |
| VF Max | 1.0 V @ 40 mA - Low conduction loss improves efficiency in battery-powered and energy-sensitive designs |
| IR Max | 0.2 µA @ 30 V - Minimal leakage preserves standby power in always-on circuits |
| trr | 5.0 ns - Enables clean switching in >10 MHz clocked clamp, mixer, and detector stages |
| CT | 5.0 pF @ 0 V - Low junction capacitance minimizes signal distortion in RF and high-speed digital interfaces |
| PD | 350 mW - Power dissipation limit at TA = 25°C; derates linearly above 25°C per 357°C/W RθJA |
Pinout & Package
Package: SOT23 (Standard), 3-terminal surface-mount plastic package with matte tin-plated Alloy 42 leadframe, moisture sensitivity level 1, UL 94V-0 rated molding compound, weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node in rectifier/clamp configuration; polarity marked by cathode band on package top view |
| Cathode (Pin 2) | Forward current exit / reverse voltage blocking terminal | Connected to lower-potential node; forms low-VF path when forward-biased; blocks up to 40 V in reverse |
| NC / Heat Sink (Pin 3) | No internal connection | Unused terminal; may be left floating or grounded for mechanical stability-no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | VF ≤ 1.0 V @ 40 mA reduces conduction loss by ≥40% vs. comparable PN diodes in 3.3 V supply paths |
| Fast switching speed | trr ≤ 5.0 ns enables use in 10–50 MHz signal routing without tail current distortion |
| PN junction guard ring | Integrated ESD protection structure withstands ±8 kV contact discharge per IEC 61000-4-2 |
| Lead-free & RoHS 3 compliant | No intentionally added lead, Br/Cl < 900 ppm, Sb < 1000 ppm - meets global environmental compliance mandates |
| SOT23 footprint compatibility | Standard 3-pin SOT23 land pattern allows direct substitution into existing layouts without redesign |
Applications
| DC-DC Converter Output Rectification | Low-Voltage Signal Clamping |
|---|---|
Use Scenario: Secondary-side rectification in buck or flyback converters supplying 1.2–5 V logic rails. IC Role / Device Role: Schottky rectifier replacing PN diode to minimize VF-related losses and improve light-load efficiency. Use Value: 380–1000 mV VF range cuts conduction loss by up to 65% vs. 1N4148 at 10–40 mA, extending battery life in portable devices. | Use Scenario: Input protection and voltage limiting for ADC inputs, GPIO pins, or op-amp front-ends operating at ≤5 V. IC Role / Device Role: Clamp diode shunting overvoltage transients to VCC or GND rails. Use Value: Guard ring structure ensures reliable clamping under ESD events without degradation; 5 pF CT avoids signal loading in ≤10 MHz analog paths. |
| RF Detector / Mixer Diode | High-Speed Logic-Level Translation |
Use Scenario: Demodulation of AM signals or frequency mixing in sub-GHz ISM band receivers. IC Role / Device Role: Zero-bias or low-bias Schottky detector element leveraging low barrier height and minimal CT. Use Value: 5.0 ns trr and 4–5 pF CT support operation up to 100 MHz with minimal phase distortion and insertion loss. | Use Scenario: Bidirectional level shifting between 1.8 V and 3.3 V domains in I²C or SPI buses. IC Role / Device Role: Passive clamp diode preventing overshoot/undershoot beyond safe logic thresholds. Use Value: Sub-1 V VF ensures clamping occurs within 100 mV of rail limits, preserving noise margins and timing integrity. |
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 SOD-123 package, VF = 0.55 V @ 0.5 A | Better suited for higher-current power rectification; not pin-compatible | Select when >200 mA average current or higher surge tolerance (IFSM = 5 A) is required |
| NSR0230HT1G | Lower VF (0.3 V @ 0.1 A), same SOT23-3, but IR = 10 µA @ 30 V (50× higher leakage) | Preferred for ultra-low-loss biasing; less suitable for precision clamping due to leakage | Choose for minimum conduction loss where leakage < 1 µA is not critical |
Compared with MBR0540T1G and NSR0230HT1G, BAS40-04-7 offers optimal balance of low leakage (0.2 µA), compact SOT23 footprint, and proven ESD robustness-making it preferred for space-constrained, low-power, and mixed-signal interface protection.
Availability
BAS40-04-7 is available at Aetrix Electronics and suitable for DC-DC converter rectification, RF detection, low-voltage clamping, and logic-level translation requiring stable component supply across industrial, consumer, and automotive-qualified design cycles.
Supply support for BAS40-04-7 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, manufacturing, and sales operations across Asia, Europe, and the Americas.
The BAS40 series belongs to Diodes' general-purpose Schottky diode product line, engineered specifically for high-efficiency, low-leakage, and ESD-hardened applications in portable, automotive, and industrial electronics.
FAQ
Is BAS40-04-7 AEC-Q101 qualified?
No-BAS40-04-7 is the commercial-grade variant. The automotive-qualified version is BAS40-04Q-7-F, which carries AEC-Q101 qualification, PPAP capability, and is manufactured in IATF16949-certified facilities. Electrical specifications are identical, but qualification documentation and traceability differ.
What is the maximum junction temperature for continuous operation?
The absolute maximum junction temperature is +150°C, but the device is rated for continuous operation up to +125°C ambient temperature. At TA = 125°C, power dissipation must be limited to ≤100 mW based on the 357°C/W RθJA and derating curve in DS11006 Rev. 27.
Does BAS40-04-7 have a cathode marking on the package?
Yes-SOT23 top-view marking includes a cathode band adjacent to Pin 2. The device marking code "K44" (per datasheet page 4) identifies BAS40-04 variants, and the cathode band aligns with standard SOT23 polarity conventions used across Diodes' Schottky portfolio.
Can BAS40-04-7 replace 1N4148 in high-speed switching applications?
Yes-with caveats: BAS40-04-7 offers faster trr (5 ns vs. 4 ns typical for 1N4148) and lower VF, but its 40 V VRRM is lower than 1N4148's 100 V. It is suitable where reverse voltage stays below 40 V and low forward loss is prioritized-e.g., 3.3 V logic clamping-but not for 48 V or AC line applications.
BAS40-04-7 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 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-23-3
BAS40-04-7 FAQ
1.How can I place an order for BAS40-04-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40-04-7 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 BAS40-04-7 reliable?
The price and inventory of BAS40-04-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40-04-7 is usually 5 days.
3.What payment methods are accepted for BAS40-04-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40-04-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40-04-7?
BAS40-04-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40-04-7 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 BAS40-04-7?
For technical support, including BAS40-04-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40-04-7 requirements.
6.How does Aetrix verify that BAS40-04-7 is sourced from the original manufacturer or authorized distributors?
All BAS40-04-7 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 BAS40-04-7 meets industry standards.
7.What is the process for return or replacement of BAS40-04-7?
All BAS40-04-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAS40-04-7, 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 BAS40-04-7 part is unused and in its original packaging.
Return procedure for BAS40-04-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS40-04-7 Tags
-
BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
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