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Nexperia USA Inc. BAS21GWX
- Part No.:
- BAS21GWX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
BAS21GWX.pdf
- Description:
- DIODE GEN PURP 200V 225MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:50,535
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Product details
Overview
BAS21GWX from Nexperia is a high-voltage switching diode in SOD123 package, designed for fast turn-off in automotive and industrial power supply rails. It delivers 200 V reverse voltage rating, ≤50 ns reverse recovery time, ≤100 nA leakage at 200 V, 1.25 V forward voltage at 200 mA, and 2 pF junction capacitance - enabling reliable operation in flyback snubbers and ESD-protected signal routing.
For engineers reviewing the BAS21GWX datasheet, BAS21GWX pinout, BAS21GWX application, or BAS21GWX equivalent, key selection criteria include verified AEC-Q101 qualification, thermal resistance to ambient (330 K/W on FR4), peak repetitive reverse voltage (250 V), and cathode/anode terminal mapping confirmed per SOD123 mechanical outline.
Technical Context
The BAS21GWX is a planar epitaxial silicon switching diode optimized for high-speed voltage clamping and transient suppression in DC-DC converters and automotive lighting drivers. Its low trr (≤50 ns) and low Cd (≤2 pF) support clean edge transitions in PWM-controlled inductive loads.
Rated for 200 V continuous reverse voltage and 250 V repetitive peak, it operates across −55 °C to +150 °C with junction temperature-limited derating. The device uses a single-die construction with metallized cathode termination compatible with standard reflow profiles for SOD123 footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 200 V - supports 12 V/24 V automotive bus protection without derating |
| Reverse Recovery Time (trr) | ≤50 ns - enables >1 MHz switching in synchronous rectifier and snubber circuits |
| Forward Voltage (VF) | 1.25 V @ 200 mA - limits conduction loss to <250 mW in 225 mA continuous operation |
| Reverse Leakage (IR) | ≤100 nA @ 200 V, 25 °C - ensures minimal standby current in always-on battery monitoring paths |
| Junction Capacitance (Cd) | ≤2 pF @ 0 V, 1 MHz - preserves signal integrity in RF-coupled gate drive and data line clamping |
| Thermal Resistance (Rth(j-a)) | 330 K/W - defines maximum power dissipation (660 mW) on standard FR4 PCB with tin-plated copper |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥8 kV) |
Pinout & Package
Encapsulated in SOD123 surface-mount plastic package (3.75 × 2.55 × 1.3 mm), with cathode marked by band and anode unmarked. Standard footprint requires 2.36 mm × 1.11 mm solder pad per terminal and 0.81 mm solder mask opening.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to higher-potential node during reverse bias; carries full forward current return path |
| 2 | Anode (A) | Connected to lower-potential node during forward conduction; ties to ground-referenced switch node |
Key Features
| Feature | Design Value |
|---|---|
| High-speed switching | trr ≤ 50 ns ensures minimal switching loss in 500 kHz–1 MHz SMPS topologies |
| Low leakage current | IR ≤ 100 nA at 200 V enables use in high-impedance voltage sense dividers without offset error |
| High reverse voltage rating | VR = 200 V allows direct placement across 12 V/24 V battery rails with 2.5× safety margin |
| Small SMD footprint | SOD123 package saves >40% board area vs. DO-35 while maintaining thermal performance |
| AEC-Q101 qualification | Validated for automotive underhood environments including 1000-hr HTOL at 150 °C |
Applications
| Automotive LED Headlamp Driver | Industrial DC-DC Flyback Snubber |
|---|---|
Use Scenario: Clamps voltage spikes during MOSFET turn-off in constant-current LED driver circuits operating from 12 V vehicle battery. IC Role / Device Role / Timing Role: Fast-switching clamp diode placed across primary winding to absorb inductive kickback energy. Use Value: 50 ns trr prevents secondary-side overshoot exceeding 250 V, protecting 650 V MOSFETs and reducing EMI filter size. |
Use Scenario: Suppresses ringing and voltage overshoot in isolated flyback converters powering PLC I/O modules. IC Role / Device Role / Timing Role: High-voltage snubber diode in RCD network tied to transformer primary. Use Value: 200 V VR rating and 2 pF Cd minimize capacitive loading on control loop while sustaining 250 V transients. |
| USB-C ESD Protection Interface | Smart Meter Power Supply Clamp |
Use Scenario: Front-end transient voltage suppression for USB-C CC and VCONN lines exposed to hot-plug events. IC Role / Device Role / Timing Role: Bidirectional clamping element in series with TVS array to limit di/dt-induced overshoot. Use Value: Low IR (≤100 nA) avoids leakage-induced false detection in 5 V logic-level CC line sensing. |
Use Scenario: Overvoltage clamp in auxiliary power supply of three-phase smart meters connected to 230 V AC mains. IC Role / Device Role / Timing Role: Primary-side clamp diode in capacitive dropper circuit limiting peak capacitor voltage. Use Value: AEC-Q101 qualification ensures long-term stability under 150 °C ambient conditions inside sealed meter 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 |
|---|---|---|---|
| ON Semiconductor MMBD2102AL | Same SOD123 package; trr = 50 ns but VR = 150 V (vs. 200 V); VF = 1.25 V @ 200 mA | Not rated for 24 V automotive systems requiring 200 V+ reverse margin | Select only if system max reverse stress remains ≤150 V and thermal budget permits higher Rth(j-a) (380 K/W) |
| Vishay 1N4148WS | SOD-323 package; VR = 100 V; trr = 4 ns (faster) but IR = 25 nA @ 20 V only - not specified at 200 V | Lacks AEC-Q101 qualification and 200 V capability; unsuitable for automotive or industrial HV rails | Use only in low-voltage (<30 V), non-automotive signal routing where ultra-fast trr outweighs voltage rating |
Compared with MMBD2102AL and 1N4148WS, BAS21GWX uniquely combines 200 V VR, AEC-Q101 qualification, and ≤50 ns trr in SOD123 - making it the only option qualified for underhood automotive switching and industrial 230 V auxiliary supplies.
Availability
BAS21GWX is available at Aetrix Electronics and suitable for automotive LED drivers, industrial flyback snubbers, USB-C interface protection, and smart meter auxiliary power supplies requiring stable component supply with guaranteed long-term availability.
Supply support for BAS21GWX 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.
The BAS21GWX belongs to Nexperia's high-voltage switching diode product line, engineered specifically for robust transient suppression and fast switching in automotive power electronics and industrial power conversion systems.
FAQ
Is BAS21GWX suitable for 24 V automotive battery rail protection?
Yes. With a 200 V continuous reverse voltage rating and AEC-Q101 qualification, BAS21GWX withstands load dump transients up to 250 V and operates reliably from −40 °C to +150 °C junction temperature - meeting ISO 7637-2 and LV-124 requirements for 24 V commercial vehicle systems.
What is the maximum continuous forward current for BAS21GWX at 85 °C ambient?
At Tamb = 85 °C, the maximum continuous forward current is derated to approximately 150 mA based on thermal resistance (330 K/W) and Ptot = 660 mW. This assumes standard FR4 PCB mounting with single-sided 1 cm² cathode pad; actual current depends on local board copper area and airflow.
Does BAS21GWX have a specified reverse recovery charge (Qrr)?
No. The official Nexperia datasheet does not specify Qrr for BAS21GWX. Only trr (≤50 ns) is guaranteed under defined test conditions (IF = 10 mA, IR = 10 mA, RL = 100 Ω). Designers requiring Qrr must characterize the device empirically or select alternatives with published Qrr data.
Can BAS21GWX replace BAS21 in existing SOD123 designs?
Yes, with verification. BAS21GWX shares identical SOD123 package, pinout, and electrical specifications with BAS21, but adds AEC-Q101 qualification and tighter IR control (≤100 nA vs. ≤500 nA). No layout or schematic changes are needed, though automotive applications require validation of full AEC-Q101 test reports.
BAS21GWX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 225mA
- 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
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- 150°C (Max)
BAS21GWX FAQ
1.How can I place an order for BAS21GWX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21GWX 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 BAS21GWX reliable?
The price and inventory of BAS21GWX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21GWX is usually 5 days.
3.What payment methods are accepted for BAS21GWX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21GWX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21GWX?
BAS21GWX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21GWX 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 BAS21GWX?
For technical support, including BAS21GWX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21GWX requirements.
6.How does Aetrix verify that BAS21GWX is sourced from the original manufacturer or authorized distributors?
All BAS21GWX 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 BAS21GWX meets industry standards.
7.What is the process for return or replacement of BAS21GWX?
All BAS21GWX units undergo pre-shipment inspection (PSI). If there is an issue with BAS21GWX, 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 BAS21GWX part is unused and in its original packaging.
Return procedure for BAS21GWX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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