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Nexperia USA Inc. BAS40LSYL
- Part No.:
- BAS40LSYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SOD-882
- Datasheet:
-
BAS40LSYL.pdf
- Description:
- DIODE SCHOTTKY 40V 120MA 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,845
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Product details
Overview
BAS40LSYL from Nexperia is a general-purpose Schottky diode in a DFN1006BD-2 (SOD882BD) leadless ultra-small surface-mount package with side-wettable flanks. It delivers 40 V reverse voltage rating, 120 mA forward current capability, 380 mV forward voltage at 1 mA, 5 pF capacitance at 0 V, and 1 µA reverse leakage at 30 V - enabling ultra-high-speed switching and voltage clamping in space-constrained DC-DC converter feedback paths.
For engineers reviewing the BAS40LSYL datasheet, BAS40LSYL pinout, BAS40LSYL application, or BAS40LSYL equivalent, this device is selected for low-capacitance, low-VF signal routing in portable power management ICs where AOI-compatible solder joints and thermal resistance of 360 K/W (junction-to-ambient, FR4) are critical design constraints.
Technical Context
The BAS40LSYL employs a planar Schottky barrier structure optimized for fast recovery (no minority carrier storage), resulting in sub-nanosecond reverse recovery time and minimal switching loss. Its low 5 pF junction capacitance and 380–1000 mV forward voltage range across 1–40 mA support high-frequency (>10 MHz) signal steering and clamp operation without significant RC delay.
Thermally, it is rated for 150 °C maximum junction temperature and exhibits transient thermal impedance down to ~10 K/W at 10 ms pulse width on standard FR4 PCBs. The side-wettable flanks enable automated optical inspection of solder fillets - a key requirement for Class 3 reliability assembly in consumer and industrial wearables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - supports clamping in 3.3 V/5 V/12 V rail protection without breakdown under surge conditions. |
| Forward Current (IF) | 120 mA continuous - sufficient for biasing, level-shifting, and small-signal OR-ing in low-power PMICs. |
| Forward Voltage (VF) | 380 mV @ 1 mA - minimizes conduction loss in low-current sensing and reference path applications. |
| Reverse Leakage (IR) | 1 µA @ 30 V - ensures negligible standby current drain in battery-backed circuits. |
| Junction Capacitance (Cd) | 5 pF @ 0 V, 1 MHz - enables clean high-frequency signal routing without parasitic loading. |
| Thermal Resistance (Rth(j-a)) | 360 K/W - defines worst-case junction temperature rise on standard FR4 PCB with 70 µm copper. |
Pinout & Package
DFN1006BD-2 (SOD882BD) package: leadless, 2-terminal, 1.0 mm × 0.6 mm × 0.47 mm body, 0.65 mm pitch, side-wettable flanks for AOI-compliant reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Marked side with bar; connects to lower-potential node in forward bias; carries full forward current path. |
| 2 | Anode (A) | Unmarked terminal; connects to higher-potential node; forms Schottky junction with cathode metal layer. |
Key Features
| Feature | Design Value |
|---|---|
| High switching speed | Sub-ns reverse recovery due to majority-carrier conduction - eliminates tail current in PWM control loops. |
| Low leakage current | ≤10 µA at 40 V reverse bias - preserves battery life in always-on sensor nodes and real-time clocks. |
| Side-wettable flanks | Plated terminations extend vertically for reliable AOI detection of solder joint integrity on fine-pitch PCBs. |
| Ultra-small footprint | 1.0 mm × 0.6 mm area - fits within 1.2 mm × 0.8 mm keep-out zones in wearable and hearing aid PCB layouts. |
Applications
| USB Type-C Port Protection | DC-DC Converter Feedback Clamp |
|---|---|
Use Scenario: Preventing backfeed and overvoltage transients on dual-role USB-C ports during plug insertion/removal. IC Role / Device Role / Timing Role: Bidirectional clamping diode placed between VBUS and CC lines to limit voltage excursions to ±5.5 V. Use Value: 5 pF capacitance avoids signal integrity degradation on 10 Mbps CC communication; 40 V rating covers worst-case hot-swap overshoot. |
Use Scenario: Clamping feedback node of synchronous buck converters to prevent regulation error during light-load discontinuous conduction mode. IC Role / Device Role / Timing Role: Fast-recovery Schottky shunt that conducts only during output voltage overshoot events (typically <100 ns duration). Use Value: 380 mV VF ensures minimal offset in voltage divider networks; low leakage avoids bias current errors in precision feedback paths. |
| Low-Power Sensor Signal Routing | RF Front-End Bias Isolation |
Use Scenario: OR-ing analog sensor outputs (e.g., thermistors, Hall sensors) into shared ADC input while preventing cross-talk. IC Role / Device Role / Timing Role: Passive isolation diode in signal path; operates in forward conduction only during active sensor read cycles. Use Value: 1 µA max reverse leakage prevents loading of high-impedance sensor sources; 120 mA rating accommodates transient ESD clamp currents. |
Use Scenario: Isolating DC bias from RF signal paths in 2.4 GHz ISM-band transceivers to avoid LO leakage and harmonic distortion. IC Role / Device Role / Timing Role: RF choke replacement in bias-T networks; blocks RF while passing DC to active components like LNAs. Use Value: 5 pF capacitance yields >1 kΩ reactance at 2.4 GHz - sufficient isolation without resonant traps; low VF avoids bias droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSR0230HT1G | 30 V VR, 200 mA IF, 450 mV VF @ 10 mA, same DFN1006 package | Lower voltage rating limits use in 12 V systems; higher current supports higher-power clamping | Select when higher forward current margin is needed and system VR ≤ 30 V |
| Vishay VS-2EDH01HM3/H | 40 V VR, 200 mA IF, 550 mV VF @ 10 mA, SOD-923 package (1.0 × 0.6 mm but no SWF) | Larger 0.3 mm height and non-SWF terminations complicate AOI and reduce thermal performance on thin PCBs | Select when board-level AOI is not required and higher surge current (200 mA IFSM) is prioritized |
Compared with NSR0230HT1G and VS-2EDH01HM3/H, the BAS40LSYL uniquely balances 40 V robustness, ultra-low 380 mV VF at microamp bias, and AOI-ready side-wettable flanks - making it optimal for miniaturized, optically inspected power management in consumer IoT endpoints.
Availability
BAS40LSYL is available at Aetrix Electronics and suitable for USB-C interface protection, DC-DC feedback clamping, low-power sensor signal routing, and RF bias isolation requiring stable component supply and consistent DFN1006BD-2 packaging.
Supply support for BAS40LSYL 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 essential semiconductors - delivering discrete, logic, and MOSFET solutions optimized for efficiency, size, and manufacturability.
The BAS40LSYL belongs to Nexperia's general-purpose Schottky diode product line, engineered specifically for space-constrained, high-speed signal integrity and power rail protection in consumer, computing, and industrial applications.
FAQ
Is BAS40LSYL suitable for automotive applications?
No. The BAS40LSYL is explicitly designated as non-automotive qualified per Nexperia's revision history (v.2, Feb 2021). It lacks AEC-Q200 qualification, automotive-grade screening, and extended temperature validation beyond −55 °C to +150 °C ambient. For automotive use, select the -Q qualified variants such as BAS40LSYL-Q.
What does the marking code 'N2' indicate on BAS40LSYL?
The 'N2' marking on the top surface identifies the BAS40LSYL device and corresponds to its specific process lot and wafer fab origin. Per Nexperia's marking table, 'N2' is the unique identifier assigned exclusively to the BAS40LSYL type number - not a date code or revision indicator.
Can BAS40LSYL replace BAT54-type diodes in existing designs?
Yes, with layout verification. BAS40LSYL shares identical electrical specs (40 V VR, ~380 mV VF) and functional role with BAT54 series, but uses DFN1006BD-2 instead of SOT-23. The smaller footprint requires pad redesign per Figure 8 footprint (1.0 mm × 0.6 mm lands), and side-wettable flanks demand compatible stencil and reflow profiles.
How does thermal resistance change with PCB copper area?
Rth(j-a) drops from 360 K/W (standard 70 µm single-sided FR4) to ~100 K/W when the cathode pad is expanded to 1 cm² - per Figure 2. This 3.6× improvement enables 200 mA pulsed operation without exceeding 150 °C junction temperature, provided the larger pad is implemented per Nexperia's mounting recommendations.
BAS40LSYL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-882
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 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
- Capacitance @ Vr, F:
- 5pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006BD-2
- Operating Temperature - Junction:
- 150°C
BAS40LSYL FAQ
1.How can I place an order for BAS40LSYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40LSYL 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 BAS40LSYL reliable?
The price and inventory of BAS40LSYL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40LSYL is usually 5 days.
3.What payment methods are accepted for BAS40LSYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40LSYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40LSYL?
BAS40LSYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40LSYL 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 BAS40LSYL?
For technical support, including BAS40LSYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40LSYL requirements.
6.How does Aetrix verify that BAS40LSYL is sourced from the original manufacturer or authorized distributors?
All BAS40LSYL 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 BAS40LSYL meets industry standards.
7.What is the process for return or replacement of BAS40LSYL?
All BAS40LSYL units undergo pre-shipment inspection (PSI). If there is an issue with BAS40LSYL, 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 BAS40LSYL part is unused and in its original packaging.
Return procedure for BAS40LSYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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