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Nexperia USA Inc. BAS40-04,235
- Part No.:
- BAS40-04,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS40-04,235.pdf
- Description:
- DIODE ARR SCHOTTKY 40V TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,608
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Product details
Overview
BAS40-04 from Nexperia is a general-purpose dual Schottky diode in SOT23 package, configured as two independent diodes sharing a common terminal (A1–K1/K2–A2 topology). It delivers 40 V reverse voltage rating, 380 mV forward voltage at 1 mA, 5 pF capacitance at 0 V, 1 µA reverse leakage at 30 V, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the BAS40-04 datasheet, BAS40-04 pinout, BAS40-04 application, or BAS40-04 equivalent, key selection criteria include dual-diode topology compatibility, low VF for signal clamping efficiency, low Cd for high-speed switching integrity, and thermal resistance (500 K/W) in FR4 PCB mounting.
Technical Context
The BAS40-04 integrates two Schottky diodes in a single SOT23-3 package with shared cathode/anode configuration (Pin 1 = A1, Pin 2 = K2, Pin 3 = K1/A2). This arrangement enables compact dual-clamp or dual-switching functions without discrete pairing.
Its 150 °C maximum junction temperature, AEC-Q101 qualification, and 10 µA IR at 40 V support operation in automotive power rail protection and industrial signal conditioning where thermal stability and low leakage are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - supports clamping of 3.3 V to 24 V logic and supply rails without breakdown |
| Forward Voltage (VF) | 380 mV @ 1 mA - minimizes conduction loss in low-current signal path protection |
| Reverse Leakage (IR) | 1 µA @ 30 V - ensures minimal standby current in battery-backed or always-on circuits |
| Capacitance (Cd) | 5 pF @ 0 V, 1 MHz - preserves signal edge integrity up to ~100 MHz switching |
| Thermal Resistance (Rth(j-a)) | 500 K/W on FR4 - defines derating curve for continuous 120 mA operation below 100 °C ambient |
| Junction Temperature (Tj) | 150 °C max - enables use in under-hood automotive modules and industrial enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements (HTOL, TC, HTRB) |
Pinout & Package
Package: SOT23-3, plastic surface-mount, 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, standard footprint per Fig. 6 (reflow) and Fig. 7 (wave).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Diode 1 (A1) | Input node for first diode path; connects to protected signal or supply line |
| 2 | Cathode of Diode 2 (K2) | Output node for second diode; used for clamping to reference or ground |
| 3 | Cathode of Diode 1 / Anode of Diode 2 (K1/A2) | Shared terminal enabling dual-diode configuration (e.g., bidirectional clamp or series switch) |
Key Features
| Feature | Design Value |
|---|---|
| High switching speed | Enabled by Schottky barrier structure and low Cd (5 pF), supporting <1 ns recovery in clamping |
| Low leakage current | 1 µA at 30 V allows use in ultra-low-power sensor interfaces and backup circuits |
| High breakdown voltage | 40 V VR rating accommodates 24 V automotive systems and industrial 36 V transients |
| Low capacitance | 5 pF at 0 V maintains signal fidelity in USB 2.0, CAN FD, and LVDS data lines |
| AEC-Q101 qualification | Validated for automotive grade-2 temperature range (−40 °C to +105 °C ambient) |
Applications
| Automotive Power Rail Protection | USB 2.0 ESD Clamp |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs against load dump and reverse polarity events in body control modules. IC Role / Device Role / Timing Role: Dual-diode clamp absorbing transient energy while maintaining low forward drop during normal operation. Use Value: 40 V VR withstands ISO 7637-2 Pulse 5a (75 V/100 ms); AEC-Q101 ensures field reliability over 15-year vehicle life. |
Use Scenario: Bidirectional ESD protection on D+ and D− lines of USB 2.0 ports in infotainment head units. IC Role / Device Role / Timing Role: Low-Cd dual Schottky pair providing sub-nanosecond response to ±15 kV HBM transients. Use Value: 5 pF capacitance avoids signal degradation at 480 Mbps; 380 mV VF prevents DC bias shift on differential pairs. |
| Industrial Sensor Signal Conditioning | Low-Power Logic-Level Translation |
Use Scenario: Clamping analog sensor outputs (e.g., thermistor, RTD bridges) to MCU ADC inputs in PLC I/O modules. IC Role / Device Role / Timing Role: Dual-path voltage limiter preventing overvoltage damage during EFT bursts or wiring faults. Use Value: 1 µA IR at 30 V eliminates measurable offset error in µA-range bridge currents; SOT23 saves board space vs. discrete diodes. |
Use Scenario: Level-shifting between 1.8 V microcontroller GPIO and 3.3 V peripheral I²C bus in portable medical devices. IC Role / Device Role / Timing Role: Passive bidirectional translator using shared-terminal topology to minimize component count. Use Value: 380 mV VF enables reliable 1.8 V → 3.3 V translation with <100 ns propagation delay; AEC-Q101 supports medical device longevity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSR20F40NXT5G | 40 V VR, 420 mV VF @ 1 mA, 10 pF Cd, SOD-523 package (smaller, 1.2 × 0.8 mm) | Higher capacitance limits use above 50 MHz; smaller footprint reduces thermal mass | Select when board area is constrained and signal bandwidth ≤30 MHz |
| Vishay SDURB140 | 40 V VR, 500 mV VF @ 1 mA, 8 pF Cd, SOT-23 package, not AEC-Q101 qualified | Lacks automotive qualification; higher VF increases conduction loss in battery-sensitive designs | Select for cost-sensitive industrial applications where AEC-Q101 is not required |
Compared with NSR20F40NXT5G and SDURB140, the BAS40-04 uniquely balances low capacitance (5 pF), ultra-low VF (380 mV), and AEC-Q101 compliance in the standard SOT23 footprint-making it optimal for automotive signal integrity and industrial low-power clamping where qualification and performance coexist.
Availability
BAS40-04 is available at Aetrix Electronics and suitable for automotive power rail protection, USB 2.0 ESD clamp, and industrial sensor signal conditioning requiring stable component supply across multi-year production cycles.
Supply support for BAS40-04 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BAS40-04 belongs to Nexperia's general-purpose Schottky diode product line, engineered specifically for compact, high-speed voltage clamping and signal routing in automotive and industrial environments.
FAQ
What is the maximum continuous forward current for BAS40-04?
The absolute maximum continuous forward current (IF) is 120 mA per diode, specified at Tamb = 25 °C with free-air conditions. Derating is required above 25 °C ambient-e.g., ~80 mA at 70 °C ambient-based on Rth(j-a) = 500 K/W and Tj(max) = 150 °C.
Can BAS40-04 be used as a standalone ESD protector for HDMI or PCIe lanes?
No-its 5 pF capacitance exceeds typical HDMI (≤0.5 pF) and PCIe Gen3+ (≤0.3 pF) requirements, risking signal integrity degradation. It is suitable for USB 2.0 (≤10 pF) and lower-speed interfaces like CAN or RS-485, but not high-speed serial links.
How does the shared-pin configuration (Pin 3 = K1/A2) affect circuit layout?
Pin 3 serves as both cathode of Diode 1 and anode of Diode 2, enabling compact dual-clamp topologies (e.g., bidirectional TVS replacement) or series-switch configurations. Layout must avoid routing conflicting voltages to this node-e.g., do not tie Pin 3 to both ground and a positive rail simultaneously.
Is BAS40-04 compatible with lead-free reflow profiles?
Yes-Nexperia specifies full compatibility with JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260 °C for 30 seconds. The SOT23 package uses matte tin plating and meets RoHS and REACH requirements without exemption.
BAS40-04,235 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Series Connection
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 120mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 40 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 40 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BAS40-04,235 FAQ
1.How can I place an order for BAS40-04,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40-04,235 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 BAS40-04,235 reliable?
The price and inventory of BAS40-04,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40-04,235 is usually 5 days.
3.What payment methods are accepted for BAS40-04,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40-04,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40-04,235?
BAS40-04,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40-04,235 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 BAS40-04,235?
For technical support, including BAS40-04,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40-04,235 requirements.
6.How does Aetrix verify that BAS40-04,235 is sourced from the original manufacturer or authorized distributors?
All BAS40-04,235 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 BAS40-04,235 meets industry standards.
7.What is the process for return or replacement of BAS40-04,235?
All BAS40-04,235 units undergo pre-shipment inspection (PSI). If there is an issue with BAS40-04,235, 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 BAS40-04,235 part is unused and in its original packaging.
Return procedure for BAS40-04,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS40-04,235 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
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