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Nexperia USA Inc. BAS40-04W,115
- Part No.:
- BAS40-04W,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAS40-04W,115.pdf
- Description:
- DIODE ARR SCHOT 40V 120MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:129,975
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Product details
Overview
BAS40-04W from Nexperia is a general-purpose dual Schottky diode in SOT323 (SC-70) package, configured as two independent diodes sharing a common terminal (A1–K1/K2–A2). It delivers 40 V reverse voltage rating, ≤380 mV forward voltage at 1 mA, and 5 pF capacitance at 0 V, enabling ultra-high-speed switching and voltage clamping in space-constrained automotive and industrial signal paths.
For engineers reviewing the BAS40-04W datasheet, BAS40-04W pinout, BAS40-04W application, or BAS40-04W equivalent, key selection criteria include its AEC-Q101 qualification, dual-diode topology with shared cathode/anode pin, low-leakage (≤10 µA at 40 V), and thermal resistance of 625 K/W on FR4 PCB - critical for reliability in automotive body control modules and power rail protection circuits.
Technical Context
The BAS40-04W integrates two monolithic Schottky junctions in a single SOT323 package with pin 3 serving as both cathode of diode 1 and anode of diode 2 - enabling compact bidirectional clamping or dual-path rectification. Its 150 °C maximum junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments.
With 200 mA non-repetitive peak forward current and 120 mA repetitive rating, it supports transient surge handling in I/O protection. The 5 pF capacitance at 1 MHz and sub-1 V VF at 40 mA ensure minimal signal distortion in high-frequency logic interface clamping applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - sets maximum allowable clamping or blocking voltage without breakdown |
| Forward Voltage (VF) | 380 mV @ 1 mA - enables low-loss signal-level clamping with minimal DC offset |
| Reverse Current (IR) | 10 µA @ 40 V - ensures low leakage in high-impedance bias networks |
| Diode Capacitance (Cd) | 5 pF @ 0 V, 1 MHz - preserves signal integrity up to ~100 MHz in RF/IO lines |
| Thermal Resistance (Rth(j-a)) | 625 K/W - defines junction-to-ambient rise per watt on standard FR4 PCB |
| Peak Forward Current (IFSM) | 200 mA @ 10 ms - supports short-duration ESD or load-dump transients |
| Junction Temperature (Tj) | 150 °C max - enables operation in engine compartment and industrial control enclosures |
Pinout & Package
Package: SOT323 (SC-70), 3-lead 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 | Cathode (Diode 2) | Output terminal for second Schottky path; routes clamped current to reference node |
| 3 | Cathode (Diode 1) / Anode (Diode 2) | Shared terminal enabling compact dual-clamp or series-switch configuration |
Key Features
| Feature | Design Value |
|---|---|
| High switching speed | Enabled by low junction capacitance (5 pF) and fast carrier transport in Schottky barrier |
| Low leakage current | ≤10 µA at VR = 40 V ensures stable biasing in high-Z sensor interfaces |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD per JESD22 |
| Small footprint | SOT323 package saves >50% board area vs. SOIC-8 dual diodes while maintaining thermal performance |
Applications
| Automotive CAN Transceiver Protection | USB 2.0 Data Line Clamping |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L pins against ISO 7637-2 pulses and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Dual Schottky clamp limiting voltage excursions to ±0.3 V above supply and below ground. Use Value: Prevents transceiver latch-up with <10 ns response and no minority-carrier storage delay. |
Use Scenario: Bidirectional ESD suppression on D+ and D− lines of USB 2.0 host ports. IC Role / Device Role / Timing Role: Low-capacitance dual clamp referenced to VBUS and GND, leveraging shared pin architecture. Use Value: Maintains 480 Mbps signal integrity with <5 pF loading and <380 mV conduction threshold. |
| Industrial Sensor Signal Conditioning | DC-DC Converter Feedback Path Protection |
Use Scenario: Guarding analog outputs of pressure/temperature sensors against overvoltage faults in factory automation PLCs. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA @ 30 V) dual clamp isolating sensitive op-amp inputs. Use Value: Preserves 16-bit ADC accuracy by preventing input stage saturation during field wiring faults. |
Use Scenario: Protecting optocoupler feedback inputs in isolated flyback converters from output overvoltage. IC Role / Device Role / Timing Role: Fast-response clamp diverting excess voltage away from TL431 reference input. Use Value: Enables reliable OVP shutdown within 100 ns while adding <0.5 % gain error at 25 °C. |
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 | Higher VF (450 mV @ 1 mA), same 40 V VR, SOD-523 package (smaller, 1.2 × 0.8 mm) | Limited thermal margin (Rth(j-a) ≈ 800 K/W); unsuitable for sustained 100 mA loads | Prefer when board area is constrained and peak current <50 mA |
| Vishay SDURB140Q-13 | Single-diode SOD-123FL package, 40 V VR, 1.4 A IF, but no dual topology or shared-pin configuration | Requires two devices + extra routing for dual-clamp function; increases BOM count and layout complexity | Choose only if higher continuous current (>120 mA) is required per diode path |
Compared with NSR20F40NXT5G and SDURB140Q-13, the BAS40-04W uniquely provides dual-diode functionality in a single SOT323 footprint with AEC-Q101 validation - delivering optimal balance of space efficiency, automotive compliance, and clamping precision for signal-level protection.
Availability
BAS40-04W is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and USB/Ethernet port protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BAS40-04W 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 BAS40-04W belongs to Nexperia's general-purpose Schottky diode product line, engineered specifically for space-constrained, high-speed clamping and switching in automotive and industrial systems where AEC-Q101 compliance and low parasitic capacitance are mandatory.
FAQ
What is the maximum continuous forward current per diode in BAS40-04W?
The BAS40-04W supports 120 mA repetitive peak forward current (IFRM) per diode path under pulsed conditions (tp ≤ 1 s, duty cycle ≤ 0.5). Continuous DC current must be derated based on ambient temperature and PCB copper area; at 25 °C on standard FR4, practical continuous rating is ~60 mA per diode to maintain Tj ≤ 125 °C.
Can BAS40-04W be used for bidirectional ESD protection on a single data line?
Yes - pins 1 and 2 serve as anode and cathode of separate diodes, while pin 3 functions as the common node. Connecting pin 3 to VCC enables positive clamping, and connecting it to GND enables negative clamping; using both configurations simultaneously achieves full bidirectional protection on one line with minimal added components.
Is the BAS40-04W pinout compatible with other SOT323 dual diodes like BAS16X?
No - BAS40-04W uses a unique pinning scheme (A1–K2–K1/A2) distinct from BAS16X (A1–K1–A2–K2 in SOT363) and standard dual-common-cathode SOT323 diodes. Substitution requires schematic and layout revision due to differing terminal assignments and internal connectivity.
How does the 625 K/W thermal resistance impact layout design?
A Rth(j-a) of 625 K/W means each watt of dissipated power raises junction temperature by 625 K above ambient on a minimal FR4 pad. To sustain 120 mA at 0.5 V drop (60 mW), keep copper area ≥ 25 mm² per pin and avoid thermal isolation; adding thermal vias under pin 3 significantly improves heat extraction in production layouts.
BAS40-04W,115 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 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:
- SOT-323
BAS40-04W,115 FAQ
1.How can I place an order for BAS40-04W,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40-04W,115 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 BAS40-04W,115 reliable?
The price and inventory of BAS40-04W,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40-04W,115 is usually 5 days.
3.What payment methods are accepted for BAS40-04W,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40-04W,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40-04W,115?
BAS40-04W,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40-04W,115 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 BAS40-04W,115?
For technical support, including BAS40-04W,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40-04W,115 requirements.
6.How does Aetrix verify that BAS40-04W,115 is sourced from the original manufacturer or authorized distributors?
All BAS40-04W,115 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 BAS40-04W,115 meets industry standards.
7.What is the process for return or replacement of BAS40-04W,115?
All BAS40-04W,115 units undergo pre-shipment inspection (PSI). If there is an issue with BAS40-04W,115, 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 BAS40-04W,115 part is unused and in its original packaging.
Return procedure for BAS40-04W,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS40-04W,115 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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