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Nexperia USA Inc. BAS40DYX
- Part No.:
- BAS40DYX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BAS40DYX.pdf
- Description:
- DIODE ARR SCHOT 40V 120MA 6TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BAS40DY from Nexperia is a general-purpose dual Schottky diode in SOT363-3 (SC-88) package, electrically isolated with two independent diodes. Each diode supports 120 mA forward current, 40 V reverse voltage, 380 mV forward voltage at 1 mA, 5 pF capacitance at 0 V, and 1 µA reverse leakage at 30 V - optimized for ultra high-speed switching and voltage clamping in compact DC-DC converters and signal routing circuits.
For engineers reviewing the BAS40DY datasheet, BAS40DY pinout, BAS40DY application, or BAS40DY equivalent, this dual Schottky diode is selected for low VF, low Cd, high VR, and thermally efficient TSSOP6 packaging in space-constrained, high-frequency analog and power management designs.
Technical Context
The BAS40DY integrates two electrically isolated Schottky junctions in a single 6-pin TSSOP package, with pins 1 and 6 assigned to anode/cathode of Diode 1 and pins 4 and 3 to anode/cathode of Diode 2 - enabling independent biasing and dual-path clamping without shared substrate coupling. Its 5 pF capacitance and sub-400 mV VF at 1 mA support <1 ns switching transitions in RF detector and logic-level translation circuits.
Thermal resistance from junction to solder point is 180 K/W when soldered at pins 3 and 6, and junction temperature is rated up to 150 °C - allowing reliable operation in ambient temperatures from –55 °C to +150 °C under pulsed forward currents up to 8.5 A (50 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Voltage (VF) | 380 mV at 1 mA - enables low-loss signal clamping and minimal voltage drop in bias networks |
| Reverse Voltage (VR) | 40 V - supports rail-to-rail clamping in 3.3 V/5 V/12 V logic and power domains |
| Reverse Leakage (IR) | 1 µA at 30 V - ensures stable DC blocking and low standby power in always-on circuits |
| Capacitance (Cd) | 5 pF at 0 V, 1 MHz - preserves signal integrity above 100 MHz in RF front-end and clock routing |
| Forward Current (IF) | 120 mA continuous per diode - sufficient for driving small-signal loads and LED indicators |
| Thermal Resistance (Rth(j-sp)) | 180 K/W - allows direct thermal path to PCB copper via cathode pins (3 & 6), reducing local heating |
Pinout & Package
Package: SOT363-3 (TSSOP6), 6-lead surface-mount plastic package with 0.65 mm lead pitch, 2.2 mm × 1.35 mm body size, and exposed cathode pads for thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (D1) | Input terminal for first Schottky diode; connects to source of clamped signal or supply rail |
| 2 | n.c. | No internal connection; must remain unconnected to avoid parasitic coupling |
| 3 | Cathode (D2) | Output terminal for second diode; tied to ground or reference node for clamping |
| 4 | Anode (D2) | Input terminal for second Schottky diode; enables independent dual-path configuration |
| 5 | n.c. | No internal connection; floating pin; no PCB trace required |
| 6 | Cathode (D1) | Output terminal for first diode; shares thermal pad with Pin 3 for joint heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Electrically isolated dual diodes | Enables independent signal paths without common-substrate crosstalk in mixed-signal routing |
| Low 5 pF junction capacitance | Minimizes loading on high-frequency nodes such as crystal oscillator outputs and RF detectors |
| 120 mA per-diode rating | Supports simultaneous clamping of two logic lines or dual-voltage rail protection |
| 180 K/W junction-to-solder-point Rth | Reduces thermal derating in dense layouts by leveraging cathode pins as thermal anchors |
Applications
| USB Data Line Protection | RF Detector Clamping |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines against ESD transients and overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Dual Schottky clamping diode providing bidirectional low-capacitance path to VBUS and GND. Use Value: 5 pF capacitance avoids signal integrity degradation at 480 Mbps; 380 mV VF ensures fast turn-on before IC damage threshold. | Use Scenario: Limiting RF envelope detector output swing to prevent op-amp saturation in AM receiver front-ends. IC Role / Device Role / Timing Role: Precision voltage clamp using two independent Schottky junctions referenced to different bias points. Use Value: Electrically isolated structure prevents detector output coupling into bias network; 1 µA IR maintains DC accuracy. |
| Dual-Rail Logic-Level Translation | Compact DC-DC Feedback Clamp |
Use Scenario: Translating between 1.8 V I²C and 3.3 V microcontroller GPIOs while preserving rise/fall time. IC Role / Device Role / Timing Role: Bidirectional level shifter using two Schottky diodes with separate anode/cathode terminals. Use Value: Independent pinning (Pins 1/6 and 4/3) allows asymmetric pull-up configurations; low VF minimizes voltage offset. | Use Scenario: Clamping feedback node of synchronous buck converter to limit overshoot during load transients. IC Role / Device Role / Timing Role: Fast-recovery clamp protecting error amplifier input from inductive kickback. Use Value: 8.5 A non-repetitive peak current rating handles transient energy; 40 V VR covers typical 24 V industrial rails. |
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 | Same SOT-363 package; 40 V VR, but higher VF (450 mV @ 1 mA) and higher Cd (8 pF) | Less suitable for >100 MHz RF clamping due to higher capacitance | Select when higher surge current rating (1.7 A IFSM) is prioritized over RF performance |
| Diodes Incorporated BAV99W-7-F | SOT-363 package; 70 V VR, but higher VF (1.25 V @ 10 mA) and no isolation between diodes (common cathode) | Not usable for independent dual-path clamping; limited to shared-rail applications | Select only when higher reverse voltage is critical and electrical isolation is not required |
Compared with NSR20F40NXT5G and BAV99W-7-F, the BAS40DY uniquely delivers both electrical isolation and lowest capacitance (5 pF) in SOT-363, making it optimal for RF-sensitive dual-path clamping where signal integrity and independent biasing are mandatory.
Availability
BAS40DY is available at Aetrix Electronics and suitable for USB interface protection, RF detector circuits, dual-rail logic translation, and compact DC-DC feedback clamping requiring stable component supply across automotive infotainment, industrial HMI, and IoT sensor modules.
Supply support for BAS40DY 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, logic, and MOSFET solutions - headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
The BAS40DY belongs to Nexperia's general-purpose Schottky diode product line, engineered specifically for space-constrained, high-frequency clamping and switching applications where low VF, low Cd, and dual-isolated topology are essential design requirements.
FAQ
What is the maximum continuous forward current per diode in the BAS40DY?
The BAS40DY supports 120 mA continuous forward current per diode under standard FR4 PCB mounting conditions (single-sided copper, tin-plated). This rating assumes Tamb = 25 °C and applies individually to each diode - not as a combined total - and is validated per IEC60134 absolute maximum ratings.
Are Pins 2 and 5 internally connected or truly unconnected?
Pins 2 and 5 are confirmed as true no-connect (n.c.) terminals with no internal bond wire or silicon connection. The datasheet explicitly states "not connected", and the device outline graphic shows no internal linkage. These pins must remain unconnected on PCB layout to prevent unintended coupling or solder bridging.
Can the BAS40DY be used in automotive applications?
The BAS40DY is not automotive-qualified per Nexperia's legal disclaimers. It has not undergone AEC-Q101 stress testing or automotive-specific qualification. While its operating temperature range (–55 °C to +150 °C) overlaps with automotive requirements, use in safety-critical or mission-critical vehicle systems is not warranted or supported by Nexperia.
How does the thermal resistance differ between junction-to-ambient and junction-to-solder-point?
Rth(j-a) is 480 K/W in free air, while Rth(j-sp) is 180 K/W when soldered at pins 3 and 6 - reflecting a 2.7× improvement in thermal path efficiency. This difference confirms that thermal performance depends critically on PCB copper area under cathode pads, not just ambient convection.
BAS40DYX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 2 Independent
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP
BAS40DYX FAQ
1.How can I place an order for BAS40DYX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40DYX 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 BAS40DYX reliable?
The price and inventory of BAS40DYX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40DYX is usually 5 days.
3.What payment methods are accepted for BAS40DYX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40DYX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40DYX?
BAS40DYX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40DYX 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 BAS40DYX?
For technical support, including BAS40DYX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40DYX requirements.
6.How does Aetrix verify that BAS40DYX is sourced from the original manufacturer or authorized distributors?
All BAS40DYX 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 BAS40DYX meets industry standards.
7.What is the process for return or replacement of BAS40DYX?
All BAS40DYX units undergo pre-shipment inspection (PSI). If there is an issue with BAS40DYX, 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 BAS40DYX part is unused and in its original packaging.
Return procedure for BAS40DYX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS40DYX 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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