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Nexperia USA Inc. BAS21GW-QX
- Part No.:
- BAS21GW-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
BAS21GW-QX.pdf
- Description:
- BAS21GW-Q/SOD123/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:3,822
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Product details
Overview
BAS21GW-Q from Nexperia is a high-voltage switching diode in SOD123 package, rated for 200 V reverse voltage, 225 mA forward current, and 50 ns reverse recovery time. It delivers low leakage (≤100 nA at 200 V), low capacitance (≤2 pF), and AEC-Q101 qualification-used in automotive power supply rail switching and ECU input protection circuits.
For engineers reviewing the BAS21GW-Q datasheet, BAS21GW-Q pinout, BAS21GW-Q application, or BAS21GW-Q equivalent, this page provides verified electrical parameters, thermal resistance values (Rth(j-a) = 330 K/W), cathode/anode terminal mapping, and automotive-grade substitution guidance aligned with OEM design requirements.
Technical Context
The BAS21GW-Q is a silicon planar epitaxial high-speed switching diode optimized for fast turn-off in inductive load switching and flyback energy clamping. Its 50 ns trr and 2 pF capacitance enable operation up to ~10 MHz in snubberless DC-DC converter feedback paths and signal-level isolation stages.
Designed for automotive environments, it sustains 150 °C junction temperature and meets AEC-Q101 stress test requirements including HTGB, HTRB, and temperature cycling. Reverse leakage remains ≤100 µA at 150 °C and 200 V, supporting reliable operation in under-hood ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 200 V - supports 24 V automotive systems with ≥2× safety margin against transients |
| Forward Current (IF) | 225 mA - sufficient for logic-level signal routing and low-power sensor biasing |
| Reverse Recovery Time (trr) | 50 ns - enables clean switching in 1–5 MHz PWM control loops without excessive ringing |
| Reverse Leakage (IR) | ≤100 nA @ 200 V, 25 °C - ensures minimal standby power loss in always-on vehicle modules |
| Diode Capacitance (Cd) | ≤2 pF @ 0 V, 1 MHz - preserves signal integrity in high-frequency timing and data line clamping |
| Junction Temperature (Tj) | 150 °C - certified for continuous operation in engine control units and transmission controllers |
| Thermal Resistance (Rth(j-a)) | 330 K/W - defines derating curve on standard FR4 PCB with single-sided copper |
Pinout & Package
Encapsulated in SOD123 surface-mount plastic package (2.675 mm × 1.6 mm × 1.15 mm body), with standardized cathode/anode terminals and GC marking code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to higher-potential node during reverse bias; solder pad must be sized per Fig. 9 footprint (1.11 mm × 2.36 mm) |
| 2 | Anode (A) | Connected to lower-potential node; carries forward current path; no thermal pad or exposed metal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use across temperature, humidity, and mechanical shock profiles per Rev. G |
| High-speed switching | 50 ns trr enables efficient operation in 1–10 MHz DC-DC converters and gate drive clamp circuits |
| Low leakage current | ≤100 nA at 200 V/25 °C reduces quiescent current in battery-backed modules and wake-up circuits |
| Small SMD footprint | SOD123 package allows placement in space-constrained ECU PCBs with 0.81 mm pad spacing and 4.18 mm total length |
Applications
| Automotive Power Supply Clamping | ECU Input Protection |
|---|---|
Use Scenario: Suppressing inductive kickback from solenoid drivers in transmission control units. IC Role / Device Role / Timing Role: Fast-recovery flyback diode placed across 12 V coil loads. Use Value: 50 ns trr prevents voltage overshoot beyond 250 V peak, protecting downstream MOSFETs and microcontrollers. |
Use Scenario: Protecting LIN bus receiver inputs from ±30 V load-dump transients. IC Role / Device Role / Timing Role: Bidirectional clamping diode in series with TVS array at physical layer interface. Use Value: 200 V VR rating and ≤2 pF capacitance avoid signal distortion on 20 kbps LIN communication lines. |
| Engine Control Unit Signal Isolation | Body Control Module Voltage Translation |
Use Scenario: Level-shifting crankshaft position sensor signals between 5 V MCU and 12 V sensor supply domains. IC Role / Device Role / Timing Role: Passive open-drain signal isolator using anode-to-sensor and cathode-to-MCU configuration. Use Value: ≤100 nA leakage ensures <1 µA loading on sensor output, preserving accuracy over full -40 °C to 150 °C range. |
Use Scenario: Enabling 3.3 V microcontroller GPIO to safely monitor 24 V battery status via resistive divider. IC Role / Device Role / Timing Role: Reverse-biased blocking diode in high-side sensing path to prevent backfeed into I/O pins. Use Value: 225 mA IF rating supports surge currents during cold-cranking events without degradation. |
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 MMBD2103LT1G | VR = 200 V, trr = 50 ns, but IF = 200 mA (lower than BAS21GW-Q's 225 mA) | Same SOD-123 package; slightly reduced forward current handling limits use in higher-duty-cycle solenoid drivers | Select when footprint compatibility is critical and peak IF stays below 200 mA |
| Diodes Incorporated BAV21W-7-F | VR = 250 V, trr = 50 ns, but not AEC-Q101 qualified and Rth(j-a) = 400 K/W (higher thermal resistance) | Acceptable for industrial non-automotive applications; unsuitable for under-hood deployment due to qualification gap | Choose only for cost-sensitive non-automotive designs where 250 V margin outweighs thermal and reliability trade-offs |
Compared with MMBD2103LT1G and BAV21W-7-F, the BAS21GW-Q uniquely combines AEC-Q101 qualification, 225 mA forward current headroom, and 330 K/W thermal resistance-making it the preferred choice for production automotive ECUs requiring long-term reliability at elevated ambient temperatures.
Availability
BAS21GW-Q is available at Aetrix Electronics and suitable for automotive power supply clamping, ECU input protection, and engine control unit signal isolation requiring stable component supply across multi-year vehicle production cycles.
Supply support for BAS21GW-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 essential efficiency technologies, delivering high-performance discrete, logic, and MOSFET solutions with emphasis on automotive and industrial reliability.
The BAS21GW-Q belongs to Nexperia's AEC-Q101-qualified high-voltage switching diode product line, engineered specifically for robust transient suppression and signal-level isolation in automotive electronic control units.
FAQ
Is BAS21GW-Q suitable for 48 V mild-hybrid vehicle architectures?
No. While its 200 V VR rating exceeds nominal 48 V system voltage, it is not characterized or qualified for the higher transient stresses (e.g., ISO 16750-2 Pulse 5b) typical of 48 V architectures. Nexperia recommends BAS21JW-Q (250 V) or PESD5V0S1BA for such applications.
What is the maximum allowable soldering temperature profile for BAS21GW-Q?
The device complies with J-STD-020D reflow profile for moisture sensitivity level 1. Peak temperature must not exceed 260 °C for ≤30 seconds, with ramp-up rate ≤3 °C/s and ramp-down rate ≤6 °C/s. Reflow footprint dimensions are specified in Figure 9 of the datasheet.
Does BAS21GW-Q have a built-in ESD protection structure?
No. The BAS21GW-Q is a basic switching diode without integrated ESD protection. For I/O line protection, it must be used in conjunction with dedicated ESD suppressors like PESD5V0S1BA or integrated TVS arrays-per Figure 4 layout guidelines in the datasheet.
Can BAS21GW-Q replace BAS16 in existing designs?
Yes, with verification. BAS21GW-Q offers higher VR (200 V vs. 100 V), identical SOD123 package, and same GC marking. However, its 50 ns trr is slower than BAS16's 4 ns, so it is unsuitable for >10 MHz RF or high-speed digital signal routing-only for power switching and clamping upgrades.
BAS21GW-QX 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
BAS21GW-QX FAQ
1.How can I place an order for BAS21GW-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21GW-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 BAS21GW-QX reliable?
The price and inventory of BAS21GW-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21GW-QX is usually 5 days.
3.What payment methods are accepted for BAS21GW-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21GW-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21GW-QX?
BAS21GW-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21GW-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 BAS21GW-QX?
For technical support, including BAS21GW-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21GW-QX requirements.
6.How does Aetrix verify that BAS21GW-QX is sourced from the original manufacturer or authorized distributors?
All BAS21GW-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 BAS21GW-QX meets industry standards.
7.What is the process for return or replacement of BAS21GW-QX?
All BAS21GW-QX units undergo pre-shipment inspection (PSI). If there is an issue with BAS21GW-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 BAS21GW-QX part is unused and in its original packaging.
Return procedure for BAS21GW-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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