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Nexperia USA Inc. BAS19-QVL
- Part No.:
- BAS19-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS19-QVL.pdf
- Description:
- BAS19-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,657
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Product details
Overview
BAS19-Q from Nexperia is a high-voltage switching diode in SOT23 package, rated for 100 V reverse voltage, 200 mA continuous forward current, and 50 ns reverse recovery time. It serves as a fast, low-leakage clamping and polarity protection device in automotive power management circuits.
For engineers reviewing the BAS19-Q datasheet, BAS19-Q pinout, BAS19-Q application, or BAS19-Q equivalent, key selection criteria include reverse recovery speed under 50 ns, AEC-Q101 qualification, 100 nA leakage at 100 V/25 °C, and SOT23-compatible thermal derating up to 150 °C junction temperature.
Technical Context
The BAS19-Q is a silicon planar epitaxial high-speed switching diode optimized for rapid turn-off in high-voltage transient suppression and DC rail clamping. Its 5 pF capacitance at 0 V and 50 ns trr enable clean signal edge handling in 10–100 kHz switching nodes.
Designed for automotive-grade reliability, it operates across −55 °C to +150 °C ambient with 120 V repetitive peak reverse voltage rating and 1.25 V forward voltage at 200 mA, supporting robust overvoltage protection in engine control units and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (Reverse Voltage) | 100 V - supports clamping in 42 V automotive systems and 24 V industrial rails without breakdown |
| trr (Reverse Recovery Time) | 50 ns - enables reliable operation in PWM-based DC-DC converters up to ~2 MHz effective switching frequency |
| IR (Reverse Leakage) | 100 nA at 100 V/25 °C - ensures minimal standby power loss in always-on vehicle modules |
| Cd (Diode Capacitance) | 5 pF at 0 V/1 MHz - preserves signal integrity in high-frequency sensing and communication line protection |
| Ptot (Power Dissipation) | 250 mW at Tamb ≤ 25 °C - compatible with standard FR4 PCB layout without heatsinking |
| Rth(j-a) | 500 K/W - defines thermal derating slope of 1.2 mA/°C above 25 °C ambient on standard footprint |
Pinout & Package
Package: SOT23 - surface-mount plastic package, 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, qualified per AEC-Q101.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to positive rail or switch node in clamp configuration |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Current exit path; ties to ground or reference node in reverse polarity protection circuits |
Key Features
| Feature | Design Value |
|---|---|
| High-speed switching | 50 ns trr enables use in 100 kHz–2 MHz flyback snubbers and active clamp circuits |
| AEC-Q101 qualification | Validated for automotive underhood applications including ECU, lighting, and ADAS power stages |
| Low leakage current | 100 nA at 100 V/25 °C reduces battery drain in always-on vehicle subsystems |
| Small SOT23 footprint | Enables high-density placement in space-constrained modules such as door control units and seat controllers |
Applications
| Engine Control Unit (ECU) Clamping | Automotive LED Driver Protection |
|---|---|
Use Scenario: Suppresses inductive kickback from fuel injector solenoids during PWM switching. IC Role / Device Role / Timing Role: Fast-recovery clamping diode placed across solenoid coil to limit voltage spikes to <120 V. Use Value: Prevents MOSFET gate oxide damage by limiting transient overshoot within 50 ns recovery window. | Use Scenario: Blocks reverse current during LED string hot-swap or supply reversal events. IC Role / Device Role / Timing Role: Polarity protection element in constant-current LED driver output stage. Use Value: Maintains <100 nA leakage at 48 V system level, minimizing quiescent current in daytime running light modules. |
| Body Control Module (BCM) Voltage Clamp | Industrial 24 V PLC Input Protection |
Use Scenario: Clamps transients induced on LIN bus lines during load dump or ESD events. IC Role / Device Role / Timing Role: High-voltage shunt diode tied between LIN line and ground in BCM interface IC input stage. Use Value: Withstands 100 V continuous and 120 V peak reverse stress while adding only 5 pF capacitance to signal path. | Use Scenario: Protects digital input circuitry from accidental 24 V reverse connection or field wiring faults. IC Role / Device Role / Timing Role: Series reverse-polarity blocking diode in optocoupler-isolated input channel. Use Value: Delivers 200 mA forward capability and 150 °C junction rating for uncooled industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAS21-Q | Higher VR = 250 V; same SOT23 package; trr = 50 ns; IF = 200 mA | Used where higher reverse standoff is required (e.g., 72 V telecom systems) | Select when >100 V reverse margin is needed; otherwise identical thermal and layout compatibility |
| 1N4148W-Q | Lower VR = 100 V; same trr = 4 ns (faster); IF = 150 mA; AEC-Q101 qualified | Preferred in ultra-fast logic-level clamping (e.g., CAN bus termination) | Choose only if sub-10 ns recovery is mandatory; trade-off is 50 mA lower forward current rating |
Compared with BAS21-Q and 1N4148W-Q, the BAS19-Q balances 100 V standoff, 200 mA current capacity, and AEC-Q101 compliance-making it optimal for cost-sensitive, thermally constrained automotive power nodes where 50 ns trr suffices.
Availability
BAS19-Q is available at Aetrix Electronics and suitable for automotive ECUs, LED driver modules, and industrial PLC input protection requiring stable component supply and AEC-Q101 traceability.
Supply support for BAS19-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.
The BAS19-Q belongs to Nexperia's AEC-Q101-qualified high-voltage switching diode product line, engineered specifically for robust transient suppression and polarity protection in automotive power electronics.
FAQ
Is BAS19-Q suitable for 48 V mild-hybrid vehicle systems?
Yes. With 100 V reverse voltage rating and 120 V repetitive peak rating, the BAS19-Q safely clamps transients in 48 V architectures during load dump (ISO 7637-2 Pulse 5a). Its 150 °C junction rating and AEC-Q101 qualification confirm suitability for underhood deployment.
What is the maximum continuous forward current at 85 °C ambient?
Based on the derating curve (Fig. 5), the maximum continuous forward current at 85 °C ambient is approximately 140 mA. This follows linear derating from 200 mA at 25 °C using the 500 K/W Rth(j-a) and 150 °C Tj(max), yielding 1.2 mA/°C reduction above 25 °C.
Can Pin 2 be used as a thermal pad or grounded for improved dissipation?
No. Pin 2 is explicitly marked "n.c." (not connected) in the datasheet and internal construction. Connecting it risks mechanical stress on the die bond or unintended parasitic paths. Thermal performance relies solely on junction-to-ambient conduction through Pins 1 and 3 and PCB copper area.
How does BAS19-Q compare to standard 1N4148 in automotive use?
The BAS19-Q replaces generic 1N4148 in automotive designs by adding AEC-Q101 qualification, guaranteed 100 V VR, tighter trr consistency (≤50 ns), and extended temperature range (−55 °C to +150 °C). Standard 1N4148 lacks automotive stress testing and may fail qualification screening.
BAS19-QVL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 120 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 100 V
- Capacitance @ Vr, F:
- 5pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
- Operating Temperature - Junction:
- 150°C
BAS19-QVL FAQ
1.How can I place an order for BAS19-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS19-QVL 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 BAS19-QVL reliable?
The price and inventory of BAS19-QVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS19-QVL is usually 5 days.
3.What payment methods are accepted for BAS19-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS19-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS19-QVL?
BAS19-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS19-QVL 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 BAS19-QVL?
For technical support, including BAS19-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS19-QVL requirements.
6.How does Aetrix verify that BAS19-QVL is sourced from the original manufacturer or authorized distributors?
All BAS19-QVL 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 BAS19-QVL meets industry standards.
7.What is the process for return or replacement of BAS19-QVL?
All BAS19-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BAS19-QVL, 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 BAS19-QVL part is unused and in its original packaging.
Return procedure for BAS19-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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