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Nexperia USA Inc. BAS21LDYL
- Part No.:
- BAS21LDYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- 2-XDFN
- Datasheet:
-
BAS21LDYL.pdf
- Description:
- DIODE GP 200V 330MA 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,463
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Product details
Overview
BAS21LDYL from Nexperia is a high-voltage switching diode in a DFN1006D-2 (SOD882D) leadless SMD package, rated for 200 V reverse voltage, 330 mA forward current, and 50 ns reverse recovery time. It serves as a fast, low-leakage clamping and polarity protection device in automotive power management and industrial DC-DC converter circuits.
For engineers reviewing the BAS21LDYL datasheet, BAS21LDYL pinout, BAS21LDYL application, or BAS21LDYL equivalent, key selection criteria include its AEC-Q101 qualification, 2 pF capacitance at 1 MHz, 100 nA reverse leakage at 200 V, and ultra-low 0.37 mm profile for space-constrained PCB layouts.
Technical Context
The BAS21LDYL is a silicon planar epitaxial switching diode optimized for high-speed turn-off with controlled minority-carrier lifetime. Its trr ≤ 50 ns is measured under standardized conditions (IF = IR = 30 mA, RL = 100 Ω, IR(meas) = 3 mA), ensuring predictable timing in flyback snubbers and synchronous rectifier gate drive circuits.
Thermally, it features Rth(j-sp) = 40 K/W to the cathode solder point and operates up to 150 °C junction temperature. The DFN1006D-2 package uses visible, solderable side pads-enabling reliable reflow attachment without tombstoning on fine-pitch layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR | 200 V maximum reverse voltage - supports input stage clamping in 12 V/24 V automotive systems with transient margin. |
| VRRM | 250 V repetitive peak reverse voltage - defines safe operating limit during load dump events per ISO 7637-2. |
| IF | 330 mA continuous forward current - sufficient for signal-level switching and low-power bias networks. |
| trr | ≤ 50 ns reverse recovery time - enables operation up to ~2 MHz in hard-switched topologies without excessive switching loss. |
| IR | ≤ 100 nA at VR = 200 V, Tj = 25 °C - ensures minimal standby power drain in battery-backed circuits. |
| Cd | ≤ 2 pF at VR = 0 V, f = 1 MHz - reduces capacitive loading on high-impedance control nodes and clock lines. |
| Ptot | 610 mW at Tamb ≤ 25 °C - sets thermal derating envelope for FR4 PCBs with standard footprint. |
Pinout & Package
Encapsulated in the DFN1006D-2 (SOD882D) package: 1.0 mm × 0.6 mm × 0.4 mm body, 0.65 mm pitch, side-solderable terminals, and typical height of 0.37 mm. Cathode identified by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | K (cathode) | Current exit terminal; connects to ground or lower-potential node; thermally coupled to solder pad for enhanced heat dissipation. |
| 2 | A (anode) | Current entry terminal; ties to supply rail or switched node; electrically isolated from cathode pad in layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥ 8 kV), enabling use in engine control and ADAS modules. |
| Ultra-small DFN1006D-2 | 0.6 mm width allows placement between QFN pins or beneath connectors-reducing board area by >60% vs. SOT23-3 equivalents. |
| Low trr ≤ 50 ns | Minimizes reverse conduction overlap in half-bridge freewheeling paths, reducing shoot-through risk in motor drivers. |
| Low Cd ≤ 2 pF | Preserves signal integrity on 50 Ω RF detector inputs and high-frequency feedback loops without added compensation. |
| Solderable side pads | Enables visual IPC-A-610 Class 2 inspection and eliminates voiding concerns common in bottom-terminated chip-scale packages. |
Applications
| Automotive Load Dump Protection | Industrial DC-DC Flyback Snubber |
|---|---|
Use Scenario: Suppresses 120 V transients induced during alternator load dump in vehicle infotainment power supplies. IC Role / Device Role / Timing Role: Fast-clamping diode placed across primary-side MOSFET drain-source to clamp voltage spikes before they exceed breakdown limits. Use Value: Withstands 250 V repetitive peak reverse voltage and recovers in ≤50 ns-preventing secondary-side overvoltage propagation while minimizing energy dissipation. | Use Scenario: Absorbs leakage inductance energy in isolated flyback converters used in PLC I/O modules. IC Role / Device Role / Timing Role: Secondary-side snubber diode in RCD network, conducting only during MOSFET off-time to dissipate stored energy. Use Value: Low 2 pF capacitance avoids resonant ringing with snubber resistor; 100 nA leakage prevents false triggering in high-impedance feedback paths. |
| Reverse Polarity Input Protection | High-Speed Signal Clamping |
Use Scenario: Protects 24 V industrial sensors from damage due to incorrect wiring during field installation. IC Role / Device Role / Timing Role: Series-connected anode-to-input diode blocking reverse current flow while passing normal forward-biased operation. Use Value: 330 mA continuous rating handles sensor bias currents; 0.37 mm height fits under shield cans in compact sensor housings. | Use Scenario: Limits analog front-end inputs in test equipment to ±5 V during overvoltage fault conditions. IC Role / Device Role / Timing Role: Shunt-connected diode pair (anode-to-rail, cathode-to-rail) clamping signal excursions beyond safe ADC input range. Use Value: 50 ns trr ensures clamping action completes before sampling window closes; 2 pF capacitance avoids bandwidth degradation above 100 MHz. |
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 NSR20F20NXT5G | 200 V VRRM, 200 mA IF, 35 ns trr, same DFN1006D-2 package | Lower forward current rating limits use in higher-power clamping; faster trr benefits higher-frequency designs | Select when trr < 40 ns is required and IF ≤ 200 mA suffices. |
| Diodes Incorporated BAV21WQ-7-F | 250 V VRRM, 250 mA IF, 50 ns trr, SOD-123 package (2.9 mm × 1.8 mm) | Larger footprint increases board area; higher VRRM supports 48 V telecom systems | Select when higher reverse voltage margin is critical and space constraints allow larger package. |
Compared with NSR20F20NXT5G and BAV21WQ-7-F, the BAS21LDYL uniquely balances 330 mA current handling, 50 ns trr, and AEC-Q101 qualification in the smallest possible footprint-making it optimal for automotive and space-limited industrial power rails.
Availability
BAS21LDYL is available at Aetrix Electronics and suitable for automotive load dump protection, industrial DC-DC flyback snubbing, and reverse polarity input protection requiring stable component supply and long-term lifecycle assurance.
Supply support for BAS21LDYL 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 delivering high-performance logic, discrete, and MOSFET devices with focus on efficiency, reliability, and miniaturization.
The BAS21LDYL belongs to Nexperia's AEC-Q101-qualified high-voltage switching diode product line, engineered specifically for robust transient suppression and polarity protection in harsh automotive and industrial environments.
FAQ
Is BAS21LDYL suitable for automotive applications?
Yes. The BAS21LDYL is fully AEC-Q101 qualified, having passed stress tests including temperature cycling, high-temperature reverse bias, and ESD (HBM ≥ 8 kV). It is approved for use in engine control units, body electronics, and ADAS modules where reliability under thermal and electrical stress is mandatory.
What is the thermal resistance from junction to solder point (Rth(j-sp))?
The BAS21LDYL has a typical Rth(j-sp) of 40 K/W, measured at the cathode solder point. This value assumes proper PCB layout with a dedicated 1 cm² copper pad under the cathode terminal, enabling effective heat transfer during pulsed operation or elevated ambient temperatures.
How is the cathode identified on the DFN1006D-2 package?
The cathode is marked by a visible bar on the top surface of the DFN1006D-2 package, aligned with pin 1. Per Figure 1 in the datasheet, the marking code "0110 0001" appears adjacent to this bar, and the reading direction follows the arrow shown in the binary marking diagram-ensuring unambiguous orientation during automated optical inspection.
Can BAS21LDYL replace BAS21 in existing designs?
No direct drop-in replacement: BAS21 is a DO-35 through-hole diode (5.2 mm length), while BAS21LDYL is a 1.0 mm × 0.6 mm DFN1006D-2 SMD device. Though both share 200 V VR and ~50 ns trr, the package change requires PCB redesign, stencil adjustment, and reflow profile validation-especially for solder joint reliability on side pads.
BAS21LDYL 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)
BAS21LDYL FAQ
1.How can I place an order for BAS21LDYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21LDYL 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 BAS21LDYL reliable?
The price and inventory of BAS21LDYL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21LDYL is usually 5 days.
3.What payment methods are accepted for BAS21LDYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21LDYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21LDYL?
BAS21LDYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21LDYL 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 BAS21LDYL?
For technical support, including BAS21LDYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21LDYL requirements.
6.How does Aetrix verify that BAS21LDYL is sourced from the original manufacturer or authorized distributors?
All BAS21LDYL 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 BAS21LDYL meets industry standards.
7.What is the process for return or replacement of BAS21LDYL?
All BAS21LDYL units undergo pre-shipment inspection (PSI). If there is an issue with BAS21LDYL, 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 BAS21LDYL part is unused and in its original packaging.
Return procedure for BAS21LDYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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