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Nexperia USA Inc. BAS40-05W-QX
- Part No.:
- BAS40-05W-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAS40-05W-QX.pdf
- Description:
- DIODE ARR SCHOT 40V 120MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,759
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Product details
Overview
BAS40-05W-Q from Nexperia is a general-purpose dual Schottky diode in SOT323 (SC-70) package, configured as two anodes sharing a common cathode. It delivers 40 V reverse voltage rating, 120 mA forward current capability, and 380 mV typical forward voltage at 1 mA, enabling ultra-high-speed switching and voltage clamping in space-constrained automotive signal paths.
For engineers reviewing the BAS40-05W-Q datasheet, BAS40-05W-Q pinout, BAS40-05W-Q application, or BAS40-05W-Q equivalent, key selection criteria include its AEC-Q101 qualification, low 5 pF capacitance at 0 V, 1 µA max reverse leakage at 30 V, and thermal resistance of 625 K/W on FR4 - all critical for EMI-sensitive, thermally constrained automotive front-end circuits.
Technical Context
This dual Schottky diode integrates two independent anode terminals (A1, A2) with a shared cathode (K1/K2), supporting independent signal routing or parallel conduction paths without internal coupling. Its low forward voltage and fast recovery enable efficient clamping in high-frequency digital I/O protection and level-shifting interfaces.
The device operates across −65 °C to +150 °C ambient and junction temperatures, with thermal resistance measured on single-sided FR4 PCBs. Its 5 pF capacitance at 1 MHz and 0 V bias ensures minimal signal distortion in RF-adjacent or high-speed data line applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - supports clamping up to automotive 36 V battery transients without breakdown |
| Forward Voltage (VF) | 380 mV @ 1 mA - enables low-loss signal steering in low-power logic interfaces |
| Reverse Leakage (IR) | 1 µA @ 30 V - ensures minimal standby current in always-on automotive modules |
| Diode Capacitance (Cd) | 5 pF @ 0 V, 1 MHz - preserves signal integrity in >100 MHz digital or RF-coupled lines |
| Thermal Resistance (Rth(j-a)) | 625 K/W - defines power derating on standard FR4; limits continuous dissipation to ~160 mW at ΔT = 100 K |
| Junction Temperature (Tj) | 150 °C - allows operation in under-hood ECUs with localized heating |
Pinout & Package
Package: SOT323 (SC-70), 3-pin surface-mount plastic package, 2.0 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (Diode 1) | Input terminal for first Schottky path; connects to protected signal or supply rail |
| 2 | Anode (Diode 2) | Independent input terminal for second Schottky path; enables dual-rail clamping |
| 3 | Common Cathode (K1/K2) | Shared output node tied to reference (e.g., VCC or GND); defines clamping polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements - eliminates need for additional qualification effort |
| Low forward voltage | 380 mV typ. at 1 mA - reduces conduction loss in low-voltage logic-level translation |
| High switching speed | No specified trr, but Schottky architecture enables sub-nanosecond recovery - suitable for >100 MHz signal clamping |
| Low leakage & capacitance | 1 µA IR @ 30 V and 5 pF Cd - minimizes loading and DC error in precision analog front-ends |
Applications
| Automotive CAN Transceiver Protection | USB 2.0 Data Line Clamping |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L pins against ISO 7637-2 load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Dual-anode clamping diode referenced to VCC, absorbing positive transients while blocking reverse current. Use Value: 40 V VR withstands 36 V battery surges; 5 pF capacitance avoids USB 2.0 eye diagram degradation. |
Use Scenario: ESD and overvoltage protection on D+ and D− lines of embedded USB host/device ports. IC Role / Device Role / Timing Role: Bidirectional clamping pair with common cathode tied to 3.3 V rail, shunting ±15 kV HBM spikes. Use Value: 380 mV VF ensures minimal voltage offset during normal signaling; AEC-Q101 grade supports industrial-grade reliability. |
| LVDS Receiver Input Protection | Low-Power Microcontroller GPIO Clamp |
Use Scenario: Safeguarding differential inputs of LVDS receivers in ADAS camera links exposed to cable-induced transients. IC Role / Device Role / Timing Role: Independent anode clamps on both P/N inputs, referencing common 2.5 V supply rail. Use Value: 1 µA IR prevents DC bias shift in high-impedance receiver inputs; compact SOT323 fits tight layout spacing. |
Use Scenario: Preventing latch-up and damage on 3.3 V microcontroller GPIOs connected to external sensors or switches. IC Role / Device Role / Timing Role: Anode-to-GPIO, cathode-to-VCC configuration for positive transient suppression. Use Value: 120 mA IF rating handles brief surge currents; 150 °C Tj supports operation in sealed enclosures. |
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, 200 mA IF, VF = 450 mV @ 10 mA, SOD-523 package (smaller, 1.2 × 0.8 mm) | Higher current rating but larger VF; smaller footprint limits thermal mass | Prefer when board space is tighter than thermal margin; verify 625 K/W derating suffices |
| Vishay SDURB140Q-7-F | 40 V VR, 1 A IF, VF = 550 mV @ 100 mA, SOD-323 package (larger, 1.7 × 1.3 mm) | Higher power handling but 110 mV higher VF and 3× larger capacitance (16 pF) | Choose only if >200 mA surge current must be clamped; avoid in >50 MHz signal paths |
Compared with NSR20F40NXT5G and SDURB140Q-7-F, BAS40-05W-Q offers optimal balance of low VF, low Cd, and AEC-Q101 compliance in the widely adopted SOT323 footprint - making it preferred for automotive signal integrity-critical clamping where thermal and capacitive constraints dominate.
Availability
BAS40-05W-Q is available at Aetrix Electronics and suitable for automotive ECU protection, USB interface hardening, and LVDS receiver safeguarding requiring stable component supply and long-term lifecycle assurance.
Supply support for BAS40-05W-Q 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.
BAS40-05W-Q belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for robust signal-level protection in automotive infotainment, body electronics, and ADAS subsystems.
FAQ
Is BAS40-05W-Q suitable for bidirectional ESD protection?
No - it is a unidirectional dual Schottky diode with common cathode configuration, designed for clamping positive transients to VCC. For bidirectional protection, a dedicated TVS array or back-to-back diode arrangement is required. Its pinout does not support symmetrical clamping to ground and supply simultaneously.
What is the maximum continuous forward current for BAS40-05W-Q at 85 °C ambient?
At Tamb = 85 °C, the maximum continuous forward current is derated to approximately 85 mA based on its 625 K/W thermal resistance and 150 °C max junction temperature. This assumes standard FR4 PCB mounting with single-sided copper; actual rating depends on board layout and airflow.
Can BAS40-05W-Q replace BAS40-04W in existing designs?
Yes - both share identical SOT323 package, pinout, and electrical specifications (40 V VR, 120 mA IF). BAS40-05W-Q adds AEC-Q101 qualification and updated marking; no layout or schematic changes are needed for drop-in replacement in automotive or industrial applications.
Does BAS40-05W-Q have a specified reverse recovery time (trr)?
No - as a Schottky diode, it has no minority-carrier storage delay and therefore no defined trr parameter. Its switching speed is limited only by junction capacitance (5 pF) and series resistance, enabling effective operation in circuits up to several hundred MHz without recovery-related distortion.
BAS40-05W-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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):
- 120mA
- 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
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BAS40-05W-QX FAQ
1.How can I place an order for BAS40-05W-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40-05W-QX 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 BAS40-05W-QX reliable?
The price and inventory of BAS40-05W-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40-05W-QX is usually 5 days.
3.What payment methods are accepted for BAS40-05W-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40-05W-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40-05W-QX?
BAS40-05W-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40-05W-QX 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 BAS40-05W-QX?
For technical support, including BAS40-05W-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40-05W-QX requirements.
6.How does Aetrix verify that BAS40-05W-QX is sourced from the original manufacturer or authorized distributors?
All BAS40-05W-QX 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 BAS40-05W-QX meets industry standards.
7.What is the process for return or replacement of BAS40-05W-QX?
All BAS40-05W-QX units undergo pre-shipment inspection (PSI). If there is an issue with BAS40-05W-QX, 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 BAS40-05W-QX part is unused and in its original packaging.
Return procedure for BAS40-05W-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS40-05W-QX 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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