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Nexperia USA Inc. BAS21LLYL
- Part No.:
- BAS21LLYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- 2-XDFN
- Datasheet:
-
BAS21LLYL.pdf
- Description:
- DIODE GP 200V 330MA 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:24,888
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Product details
Overview
BAS21LLYL from Nexperia is a high-voltage switching diode in DFN1006-2 (SOD882) package, rated for 200 V reverse voltage, 330 mA forward current, 50 ns reverse recovery time, 1.25 V forward voltage at 200 mA, and 100 nA reverse leakage at 200 V. It serves as a fast, low-capacitance clamping and polarity protection device in automotive power management circuits.
For engineers reviewing the BAS21LLYL datasheet, BAS21LLYL pinout, BAS21LLYL application, or BAS21LLYL equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance values, SOD882 footprint details, and real-world use cases in reverse polarity protection and high-speed switching.
Technical Context
The BAS21LLYL is a silicon planar epitaxial switching diode optimized for high-voltage transient suppression and fast turn-off. Its 50 ns trr and 2 pF capacitance enable clean signal integrity in 1–10 MHz switching nodes, while its 250 V repetitive peak reverse voltage rating supports robust operation under surge conditions.
AEC-Q101 qualification confirms reliability across −40 °C to +150 °C junction temperature range. Thermal resistance from junction to solder point is 45 K/W, enabling direct cathode pad thermal coupling on FR4 PCBs with 1 cm² copper area - critical for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (Reverse Voltage) | 200 V - supports DC bus clamping in 12 V/24 V automotive systems without derating |
| VRRM (Repetitive Peak VR) | 250 V - withstands load-dump transients per ISO 7637-2 Pulse 5a |
| IF (Forward Current) | 330 mA continuous - sufficient for sensor biasing and logic-level signal routing |
| trr (Reverse Recovery Time) | 50 ns - enables stable operation up to ~3 MHz switching frequency |
| Cd (Diode Capacitance) | 2 pF at 0 V - minimizes capacitive loading on high-impedance analog or RF signal paths |
| IR (Reverse Leakage) | 100 nA at 200 V, 25 °C - ensures negligible standby current in battery-critical circuits |
| Rth(j-sp) | 45 K/W - allows direct thermal path to PCB copper, reducing junction temperature rise by >30 % vs. standard mounting |
Pinout & Package
DFN1006-2 (SOD882) ultra-small leadless plastic package: 1.0 mm × 0.6 mm × 0.48 mm body, 0.65 mm pitch, cathode-marked top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to ground or lower-potential node; thermal path via exposed cathode pad to PCB copper |
| 2 | Anode (A) | Connected to input or higher-potential node; carries forward current during conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JS-001 |
| Ultra-low Cd = 2 pF | Preserves signal edge rate in high-frequency data lines (e.g., LIN, CAN FD stubs) |
| Low IR = 100 nA @ 200 V | Enables multi-year battery life in always-on vehicle modules (e.g., telematics wake-up circuits) |
| trr ≤ 50 ns | Reduces switching losses and prevents shoot-through in synchronous rectifier auxiliary paths |
| DFN1006-2 footprint | 0.6 mm² board area - fits dense ADAS sensor PCB layouts without compromising thermal performance |
Applications
| Automotive Reverse Polarity Protection | High-Speed Signal Clamping |
|---|---|
|
Use Scenario: Protecting 12 V infotainment power inputs against accidental battery reversal during service. IC Role / Device Role / Timing Role: Series-connected high-voltage blocking diode placed before DC/DC converter input. Use Value: Withstands 250 V repetitive surges and adds <1.3 V drop at 300 mA, preserving system efficiency. |
Use Scenario: Limiting overshoot on 5 V microcontroller I/O pins exposed to external connectors. IC Role / Device Role / Timing Role: Low-capacitance clamp between I/O line and VCC/GND rails. Use Value: 2 pF capacitance avoids signal distortion up to 100 MHz; 50 ns trr prevents latch-up during fast transients. |
| Industrial Sensor Biasing | Power Supply OR'ing |
|
Use Scenario: Providing isolated bias current to Hall-effect sensors in motor control enclosures. IC Role / Device Role / Timing Role: High-impedance current source path with minimal leakage-induced offset. Use Value: 100 nA max IR ensures sub-µV error contribution in precision ratiometric sensing bridges. |
Use Scenario: Diode-OR configuration for redundant 24 V power supplies feeding PLC backplanes. IC Role / Device Role / Timing Role: Fast-recovery path selector minimizing voltage drop and cross-conduction risk. Use Value: 1.25 V VF at 200 mA and 50 ns trr reduce heat generation and improve supply switchover timing accuracy. |
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 |
|---|---|---|---|
| ON Semiconductor NSS1C200MZ4T1G | Same DFN1006-2 package; 200 V VRRM; 40 ns trr; 1.1 V VF at 200 mA; not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial only | Select when AEC-Q101 is not required and faster trr is prioritized over leakage (IR = 200 nA) |
| Diodes Incorporated BAV21WQ-7-F | SOD-123 package; 250 V VRRM; 50 ns trr; 1.25 V VF; AEC-Q101 qualified; larger 2.9 mm × 1.7 mm footprint | Higher thermal resistance (Rth(j-a) ≈ 400 K/W); requires more PCB area | Select when board space permits and legacy SOD-123 reflow compatibility is needed |
Compared with NSS1C200MZ4T1G and BAV21WQ-7-F, the BAS21LLYL uniquely balances AEC-Q101 compliance, ultra-small DFN1006-2 size, and 100 nA leakage - making it optimal for space-constrained automotive modules where standby current and qualification are non-negotiable.
Availability
BAS21LLYL is available at Aetrix Electronics and suitable for automotive reverse polarity protection, high-speed signal clamping, and industrial sensor biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BAS21LLYL 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 devices, with leadership in automotive-qualified components.
The BAS21LLYL belongs to Nexperia's AEC-Q101-qualified high-voltage switching diode product line, engineered specifically for robustness in automotive power rail protection and signal integrity preservation.
FAQ
Is BAS21LLYL pin-compatible with BAS21,115?
No. BAS21LLYL uses DFN1006-2 (SOD882) packaging with bottom-side thermal pad and 0.65 mm pitch, whereas BAS21,115 is in SOT23 package with 2.3 mm pitch and no thermal pad. Footprint, soldering profile, and thermal behavior differ significantly - redesign is required for substitution.
What is the maximum allowable junction temperature during pulsed operation?
The absolute maximum junction temperature is 150 °C under all operating conditions. For pulsed IF = 9 A (tp = 1 µs), thermal simulation using Zth(j-a) = 375 K/W shows ΔTj ≈ 3.4 °C - well within limit. Continuous operation must maintain Tj ≤ 150 °C using Rth(j-sp) = 45 K/W and adequate cathode pad copper area.
Does BAS21LLYL support reflow soldering per JEDEC J-STD-020?
Yes. The DFN1006-2 package is qualified for standard Pb-free reflow per JEDEC J-STD-020D, with peak temperature up to 260 °C. Figure 10 in the datasheet specifies the recommended solder paste stencil and land pattern - 0.3 mm wide pads with 0.7 mm length and 0.05 mm radius corners.
How does BAS21LLYL perform at elevated ambient temperatures?
At Tamb = 125 °C, IR increases to 100 µA (per Table 7), but remains within safe limits for most clamping applications. Derating curves in Figure 5 confirm usable reverse blocking down to −40 °C and up to +150 °C junction temperature, with VF increasing only ~5 % from 25 °C to 125 °C at 200 mA.
BAS21LLYL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 2-XDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 330mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 200 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 200 V
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN1006D-2
- Operating Temperature - Junction:
- 150°C (Max)
BAS21LLYL FAQ
1.How can I place an order for BAS21LLYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21LLYL 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 BAS21LLYL reliable?
The price and inventory of BAS21LLYL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21LLYL is usually 5 days.
3.What payment methods are accepted for BAS21LLYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21LLYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21LLYL?
BAS21LLYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21LLYL 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 BAS21LLYL?
For technical support, including BAS21LLYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21LLYL requirements.
6.How does Aetrix verify that BAS21LLYL is sourced from the original manufacturer or authorized distributors?
All BAS21LLYL 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 BAS21LLYL meets industry standards.
7.What is the process for return or replacement of BAS21LLYL?
All BAS21LLYL units undergo pre-shipment inspection (PSI). If there is an issue with BAS21LLYL, 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 BAS21LLYL part is unused and in its original packaging.
Return procedure for BAS21LLYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS21LLYL Tags
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