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Nexperia USA Inc. BAS40DY-QX
- Part No.:
- BAS40DY-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BAS40DY-QX.pdf
- Description:
- DIODE ARR SCHOT 40V 120MA 6TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BAS40DY-Q from Nexperia is a general-purpose electrically isolated dual Schottky diode in SOT363-3 (TSSOP6) package, rated for 40 V reverse voltage, 120 mA forward current per diode, and 380 mV forward voltage at 1 mA. It delivers ultra-high-speed switching and low leakage for voltage clamping in automotive power management and signal conditioning circuits.
For engineers reviewing the BAS40DY-Q datasheet, BAS40DY-Q pinout, BAS40DY-Q application, or BAS40DY-Q equivalent, key selection criteria include its AEC-Q101 qualification, dual-diode isolation, 5 pF capacitance at 0 V, 1 µA reverse leakage at 30 V, and thermal resistance of 430 K/W junction-to-solder-point.
Technical Context
This dual Schottky diode integrates two independent anode–cathode paths in one compact SOT363-3 package, with pins 2 and 5 unconnected to ensure electrical isolation between D1 and D2. Its low VF and fast recovery support high-frequency clamping without cross-talk or thermal coupling.
The device operates across –55 °C to 150 °C ambient, with junction temperature limited to 150 °C and qualified per AEC-Q101 for automotive under-hood applications. Thermal resistance to solder point (Rth(j-sp) = 430 K/W) enables reliable power dissipation when mounted on FR4 PCBs with standard footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - supports clamping in 24 V automotive systems with margin against transients |
| Forward Voltage (VF) | 380 mV @ 1 mA - minimizes conduction loss in low-current bias and sensing paths |
| Reverse Leakage (IR) | 1 µA @ 30 V - ensures signal integrity in high-impedance voltage clamp nodes |
| Diode Capacitance (Cd) | 5 pF @ 0 V, 1 MHz - enables operation up to ~300 MHz without significant signal distortion |
| Thermal Resistance (Rth(j-sp)) | 430 K/W - allows 120 mA continuous operation with ≤52 °C junction rise above solder point |
| Peak Forward Current (IFSM) | 1.5 A @ 10 ms - withstands short-duration load dump or ESD-induced surge events |
| Ambient Temp Range | –55 °C to +150 °C - certified for engine control units, body controllers, and ADAS sensor interfaces |
Pinout & Package
Package: SOT363-3 (TSSOP6), 6-pin surface-mount plastic package with 0.65 mm lead pitch and exposed cathode pads for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (D1) | Input terminal for first Schottky diode; connects to source/positive rail in clamp configuration |
| 2 | n.c. | No connection - electrically isolated; must remain unconnected to preserve D1/D2 separation |
| 3 | Cathode (D2) | Output terminal for second diode; tied to ground or reference node in dual-rail protection |
| 4 | Anode (D2) | Independent input for second diode; enables separate signal path routing without shared anodes |
| 5 | n.c. | No connection - maintains isolation; floating pin must not be soldered or routed |
| 6 | Cathode (D1) | Output terminal for first diode; provides dedicated return path distinct from D2's cathode |
Key Features
| Feature | Design Value |
|---|---|
| Electrically isolated dual diodes | Prevents crosstalk and ground-loop interference in multi-rail clamping or level-shifting circuits |
| AEC-Q101 qualification | Validated for automotive use including engine control, infotainment power rails, and CAN bus protection |
| Low 5 pF capacitance | Enables clean high-speed signal clamping up to UHF frequencies without phase shift or ringing |
| 120 mA per diode rating | Supports sustained current in auxiliary power monitors and battery backup diode-ORing applications |
| 380 mV VF at 1 mA | Reduces standby power loss in always-on voltage supervisor and wake-up circuitry |
Applications
| Automotive Engine Control Unit (ECU) Power Clamp | Industrial PLC Input Protection |
|---|---|
Use Scenario: Clamps transient spikes on 12 V supply rail during load dump in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Dual Schottky diode providing bidirectional overvoltage protection with independent anode routing. Use Value: Prevents damage to microcontroller I/O and analog front-end by limiting rail excursions to ≤40 V with <1 µA leakage at operating temperature. |
Use Scenario: Protects 24 V digital input channels from field-wiring induced surges and polarity reversal. IC Role / Device Role / Timing Role: Isolated dual diode used in series-shunt clamp topology across each input channel. Use Value: Enables simultaneous protection of two independent inputs using single-component footprint, reducing BOM count and PCB area by 50% vs. discrete diodes. |
| USB-C Port ESD Clamp | Medical Sensor Bias Supply Clamp |
Use Scenario: Suppresses ±15 kV contact ESD pulses on USB-C CC and VCONN lines before they reach PMIC or Type-C controller. IC Role / Device Role / Timing Role: Low-capacitance dual Schottky placed directly at connector to minimize trace inductance. Use Value: Limits clamping voltage to <20 V peak with 5 pF loading, preserving USB-C signal integrity up to 10 Gbps without jitter degradation. |
Use Scenario: Stabilizes bias voltage for low-noise instrumentation amplifiers in portable ECG and pulse oximeter front-ends. IC Role / Device Role / Timing Role: Dual diode clamps both positive and negative supply rails to prevent amplifier saturation during electrode disconnect events. Use Value: Maintains sub-µV offset stability via 380 mV VF and <1 µA IR, avoiding baseline drift during clinical measurement windows. |
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, but common-cathode configuration (not isolated); VF = 450 mV @ 1 mA | Lacks electrical isolation between diodes - unsuitable where independent rail clamping is required | Select only when shared cathode simplifies layout and cross-talk is not a concern |
| Vishay VS-4EDH02-M3/86A | SOT-23-6 package, higher VR = 45 V, but larger Rth(j-a) = 520 K/W and no AEC-Q101 certification | Not automotive-qualified; thermal performance limits continuous current in enclosed enclosures | Prefer for industrial non-automotive designs requiring higher voltage margin and lower cost |
Compared with NSR20F40NXT5G and VS-4EDH02-M3/86A, BAS40DY-Q uniquely combines AEC-Q101 qualification, electrically isolated dual diodes, and 430 K/W junction-to-solder-point thermal resistance-making it the only option for space-constrained, thermally demanding automotive clamping where channel independence is mandatory.
Availability
BAS40DY-Q is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical sensor bias networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BAS40DY-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.
BAS40DY-Q belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for robust voltage clamping and ultra-fast switching in harsh automotive and industrial environments.
FAQ
Is BAS40DY-Q pin-compatible with BAS40DW?
No. BAS40DY-Q uses SOT363-3 (TSSOP6) with pins 2 and 5 unconnected, while BAS40DW uses SOT363 with different internal connectivity and pin assignment. The pinout differs fundamentally: BAS40DY-Q has isolated anodes and cathodes (A1, K1, A2, K2), whereas BAS40DW shares cathodes. Layout redesign is required for substitution.
Can BAS40DY-Q replace BAT54S in existing designs?
Only with layout and validation changes. BAT54S is a common-cathode dual Schottky in SOT-23-3, while BAS40DY-Q is electrically isolated in SOT363-3 with six pins. Though both offer 40 V VR and similar VF, the isolation and package require new PCB footprint, routing, and thermal validation due to differing Rth(j-sp) and mounting pad geometry.
What is the maximum allowable soldering temperature profile for BAS40DY-Q?
Nexperia specifies peak reflow temperature of 260 °C for 10 seconds maximum, per J-STD-020. The device is qualified for standard lead-free reflow with preheat (150–200 °C), soak (183–200 °C for 60–120 s), and reflow (peak 235–260 °C). Wave soldering requires adherence to Fig. 7 footprint and 245 °C max wave temperature for ≤5 s contact time.
Does BAS40DY-Q support bidirectional clamping?
No - each diode conducts only anode-to-cathode. However, the dual isolated structure allows external configuration for bidirectional protection: e.g., connecting A1 to rail and K1 to ground for positive clamping, and A2 to ground and K2 to rail for negative clamping. This requires external wiring and does not imply intrinsic bidirectional conduction per diode.
BAS40DY-QX 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP
BAS40DY-QX FAQ
1.How can I place an order for BAS40DY-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40DY-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 BAS40DY-QX reliable?
The price and inventory of BAS40DY-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40DY-QX is usually 5 days.
3.What payment methods are accepted for BAS40DY-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40DY-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40DY-QX?
BAS40DY-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40DY-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 BAS40DY-QX?
For technical support, including BAS40DY-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40DY-QX requirements.
6.How does Aetrix verify that BAS40DY-QX is sourced from the original manufacturer or authorized distributors?
All BAS40DY-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 BAS40DY-QX meets industry standards.
7.What is the process for return or replacement of BAS40DY-QX?
All BAS40DY-QX units undergo pre-shipment inspection (PSI). If there is an issue with BAS40DY-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 BAS40DY-QX part is unused and in its original packaging.
Return procedure for BAS40DY-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS40DY-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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