My Inquiry
My Account
Nexperia USA Inc. BAS21AW-QX
- Part No.:
- BAS21AW-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAS21AW-QX.pdf
- Description:
- DIODE ARRAY GP 250V 225MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,024
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BAS21AW-Q from Nexperia is a dual high-voltage switching diode with common anode configuration in SOT323 (SC-70) package, rated for 250 V reverse voltage, 50 ns reverse recovery time, and 225 mA forward current per diode - used in automotive-grade voltage clamping and reverse polarity protection circuits.
For engineers reviewing the BAS21AW-Q datasheet, BAS21AW-Q pinout, BAS21AW-Q application, or BAS21AW-Q equivalent, this device serves as a qualified AEC-Q101 discrete solution where high-speed switching at elevated DC bus voltages, low leakage (<100 nA at 200 V), and compact dual-diode integration are required.
Technical Context
The BAS21AW-Q integrates two independent silicon switching diodes sharing a common anode terminal, enabling bidirectional clamping or dual-path protection in space-constrained layouts. Its 2 pF capacitance and ≤50 ns trr support operation up to ~10 MHz in snubber and flyback catch applications.
Designed for automotive environments, it sustains junction temperatures up to 150 °C and meets AEC-Q101 stress test requirements including HTGB, HTRB, and temperature cycling - with thermal resistance Rth(j-a) = 625 K/W on FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 250 V - supports clamping in 24 V and 48 V automotive power rails with margin against transients. |
| Reverse Recovery Time (trr) | ≤50 ns - enables reliable switching in PWM-driven inductive loads up to ~10 MHz. |
| Forward Current (IF) | 225 mA per diode - sufficient for signal-level protection and moderate-power transient suppression. |
| Reverse Leakage (IR) | ≤100 nA at 200 V, 25 °C - ensures minimal standby power loss in always-on vehicle modules. |
| Diode Capacitance (Cd) | ≤2 pF at 0 V, 1 MHz - preserves signal integrity in high-frequency sensing and communication lines. |
| Junction Temperature (Tj) | 150 °C max - validated for under-hood placement in engine control units and body electronics. |
| Package | SOT323 (SC-70) - 2.0 × 1.25 × 0.95 mm footprint ideal for dense automotive PCBs. |
Pinout & Package
Encapsulated in a 3-lead SOT323 (SC-70) plastic surface-mount package measuring 2.0 mm × 1.25 mm × 0.95 mm with 1.3 mm lead pitch and standard FR4-compatible solder footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Provides dedicated cathode connection for first diode path; routed to protected node or signal line. |
| 2 (K2) | Cathode of Diode 2 | Enables independent cathode routing for dual-rail clamping or redundancy in safety-critical paths. |
| 3 (CA) | Common Anode | Shared anode tied to positive rail or reference potential; simplifies layout for bidirectional clamp topology. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use across temperature, humidity, and mechanical stress tests per JESD22 standards. |
| High-speed switching | trr ≤ 50 ns ensures minimal switching loss and clean waveform edges in 10–100 kHz PWM systems. |
| Low capacitance | 2 pF typical capacitance avoids loading effects on high-impedance sensor inputs or CAN bus stubs. |
| High reverse voltage rating | 250 V VR allows direct use in 48 V mild-hybrid architectures without series stacking. |
| Thermal robustness | Rth(j-a) = 625 K/W enables operation at full current up to +85 °C ambient without derating on standard FR4. |
Applications
| Engine Control Unit (ECU) Input Protection | Automotive Infotainment Power Sequencing |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and analog sensor inputs from load-dump transients and back-EMF spikes in 12 V/24 V ECU subsystems. IC Role / Device Role / Timing Role: Dual-diode clamping element referenced to battery rail, leveraging common-anode topology for compact bidirectional surge suppression. Use Value: Prevents latch-up and permanent damage during ISO 7637-2 Pulse 5a (load dump) events up to 60 V peak with <100 nA leakage preserving sleep-mode current budgets. |
Use Scenario: Managing power-up sequencing and reverse-current blocking between multiple LDOs and PMIC outputs in head-unit mainboard designs. IC Role / Device Role / Timing Role: Reverse polarity protection switch placed at input stage of secondary regulators, using K1/K2 independently for rail isolation. Use Value: Eliminates need for external MOSFET-based ideal diodes while maintaining <1.25 V forward drop at 200 mA - reducing BOM count and board area. |
| ADAS Camera Module ESD Clamping | Electric Power Steering (EPS) Motor Driver Snubbing |
Use Scenario: Low-capacitance transient voltage suppression on MIPI CSI-2 differential pairs and I²C control lines exposed to ESD events per ISO 10605. IC Role / Device Role / Timing Role: High-speed clamping diode pair shunting ESD current away from image sensor and serializer ICs. Use Value: 2 pF capacitance avoids signal distortion on 1.5 Gbps MIPI lanes; AEC-Q101 qualification ensures reliability in vibration-prone camera housings. |
Use Scenario: Suppressing inductive kickback from brushed DC motors and H-bridge gate drivers in EPS actuator assemblies. IC Role / Device Role / Timing Role: Fast-recovery flyback diode connected across motor terminals or driver outputs to clamp voltage spikes. Use Value: 50 ns trr limits voltage overshoot to <300 V during 10 A turn-off events, preventing MOSFET avalanche failure in continuous-duty cycles. |
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 NSVBAV21MUTBG | Same SOT323 package, 250 V VR, but trr = 75 ns (vs. 50 ns); IR = 50 nA @ 200 V (lower leakage). | Marginally slower recovery limits use in >5 MHz snubbers; better suited for static clamping than dynamic switching. | Select when ultra-low leakage dominates over speed - e.g., always-on battery monitoring circuits. |
| Vishay SMBT2102Q-7-F | Higher IF = 300 mA, but VR = 200 V only; not AEC-Q101 qualified; SOT23-3 package (larger footprint). | Not suitable for 48 V systems or automotive qualification; requires layout revision due to different pinout and size. | Consider only for industrial non-automotive designs needing higher current but accepting lower voltage margin and no automotive certification. |
Compared with NSVBAV21MUTBG and SMBT2102Q-7-F, the BAS21AW-Q uniquely balances 250 V rating, 50 ns speed, AEC-Q101 compliance, and SC-70 size - making it the only option qualified for dual-role clamping and switching in next-gen 48 V automotive ECUs without footprint or qualification trade-offs.
Availability
BAS21AW-Q is available at Aetrix Electronics and suitable for automotive ECU protection, ADAS camera interface clamping, electric power steering snubbing, and infotainment power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BAS21AW-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 and advanced packaging technologies.
The BAS21AW-Q belongs to Nexperia's AEC-Q101-qualified high-voltage diode product line, engineered specifically for robust transient suppression and reverse-polarity protection in automotive power domains and signal interfaces.
FAQ
Is BAS21AW-Q suitable for 48 V mild-hybrid vehicle systems?
Yes. With a 250 V reverse voltage rating and AEC-Q101 qualification, the BAS21AW-Q supports clamping and protection in 48 V architectures, including load-dump transients up to 60 V and ISO 7637-2 compliance. Its 150 °C junction rating ensures operation in under-hood environments.
Can BAS21AW-Q replace single-diode SOT23 packages in existing designs?
No direct drop-in replacement: BAS21AW-Q uses a 3-pin common-anode dual-diode configuration (K1/K2/CA) in SOT323, whereas standard SOT23 diodes are single-element with anode/cathode pins. Layout and schematic changes are required to leverage its dual functionality.
What is the maximum continuous forward current per diode at 100 °C ambient?
Per Figure 5 in the datasheet, the derated forward current is 125 mA per diode at Tamb = 100 °C on FR4 PCB with standard footprint - based on thermal resistance Rth(j-a) = 625 K/W and Tj(max) = 150 °C.
Does BAS21AW-Q support wave soldering, and what is the recommended footprint?
Yes. Nexperia provides a dedicated wave soldering footprint (Fig. 9) with 3.65 mm × 2.1 mm pad layout, 1.425 mm × 0.9 mm solder lands, and defined transport direction. Reflow is preferred, but wave compatibility is validated per J-STD-020 and IPC-A-610 Class 3 standards.
BAS21AW-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Anode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 250 V
- Current - Average Rectified (Io) (per Diode):
- 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
- Operating Temperature - Junction:
- 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BAS21AW-QX FAQ
1.How can I place an order for BAS21AW-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21AW-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 BAS21AW-QX reliable?
The price and inventory of BAS21AW-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21AW-QX is usually 5 days.
3.What payment methods are accepted for BAS21AW-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21AW-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21AW-QX?
BAS21AW-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21AW-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 BAS21AW-QX?
For technical support, including BAS21AW-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21AW-QX requirements.
6.How does Aetrix verify that BAS21AW-QX is sourced from the original manufacturer or authorized distributors?
All BAS21AW-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 BAS21AW-QX meets industry standards.
7.What is the process for return or replacement of BAS21AW-QX?
All BAS21AW-QX units undergo pre-shipment inspection (PSI). If there is an issue with BAS21AW-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 BAS21AW-QX part is unused and in its original packaging.
Return procedure for BAS21AW-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS21AW-QX Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
