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Nexperia USA Inc. BAS21AW,115
- Part No.:
- BAS21AW,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAS21AW,115.pdf
- Description:
- DIODE ARRAY GP 250V 225MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:28,460
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Product details
Overview
BAS21AW from Nexperia is a dual high-voltage switching diode in a common-anode configuration, housed in an SOT323 (SC-70) package. It delivers 250 V reverse voltage rating, ≤50 ns reverse recovery time, ≤2 pF capacitance, and supports 225 mA forward current per diode - enabling robust high-speed clamping and polarity protection in compact power management circuits.
For engineers reviewing the BAS21AW datasheet, BAS21AW pinout, BAS21AW application, or BAS21AW equivalent, key selection criteria include verified reverse recovery performance at 10 mA/10 mA test conditions, thermal resistance of 625 K/W (junction-to-ambient), and precise SC-70 footprint compatibility for space-constrained PCB layouts.
Technical Context
The BAS21AW integrates two independent silicon switching diodes sharing a common anode terminal, forming a dual-cathode topology optimized for bidirectional voltage clamping and reverse-polarity protection. Its design targets fast transient response with trr ≤ 50 ns under defined IF/IR pulse conditions and low leakage (≤100 nA at VR = 200 V, Tamb = 25 °C).
Thermal performance is characterized by Rth(j-a) = 625 K/W on FR4 PCB and Rth(j-sp) = 300 K/W to solder point, supporting operation across –55 °C to 150 °C ambient. The device is rated for 200 mW total power dissipation at Tamb ≤ 25 °C and withstands non-repetitive surge currents up to 9 A (tp = 1 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (Reverse Voltage) | 250 V - enables use in 200 V DC bus clamping and industrial HV signal conditioning without breakdown. |
| trr (Reverse Recovery Time) | ≤50 ns - ensures minimal switching loss and clean waveform integrity in >1 MHz switching applications. |
| Cd (Diode Capacitance) | ≤2 pF at VR = 0 V, f = 1 MHz - reduces capacitive loading in RF detector and high-frequency sampling circuits. |
| IF (Forward Current) | 225 mA per diode - supports continuous operation in low-power supply rail protection and logic-level interface circuits. |
| IR (Reverse Current) | ≤100 nA at VR = 200 V, Tamb = 25 °C - maintains signal integrity in high-impedance sensing nodes and precision reference paths. |
| Rth(j-a) | 625 K/W - defines thermal derating slope on standard FR4 PCB; requires layout attention for >100 mW sustained dissipation. |
Pinout & Package
The BAS21AW is packaged in a 3-pin SOT323 (SC-70) surface-mount plastic case measuring 2.0 mm × 1.25 mm × 0.95 mm with 1.3 mm lead pitch. Thermal and mechanical data confirm suitability for reflow and wave soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Provides dedicated cathode path for first diode; used independently or in series with K2 for dual-path clamping. |
| 2 (K2) | Cathode of Diode 2 | Enables independent control or parallel connection of second diode; shares anode (Pin 3) with Diode 1. |
| 3 (CA) | Common Anode | Single anode node connecting both diodes - simplifies PCB routing in bidirectional protection and level-shifting topologies. |
Key Features
| Feature | Design Value |
|---|---|
| High-speed switching | trr ≤ 50 ns ensures minimal dead-time distortion in synchronous rectifier and flyback snubber circuits. |
| Low leakage current | IR ≤ 100 nA at 200 V enables stable biasing in high-impedance analog front-ends and sensor interfaces. |
| High reverse voltage | VR = 250 V supports direct integration into 170–200 V AC-derived DC rails without external voltage dividers. |
| Low junction capacitance | Cd ≤ 2 pF minimizes signal coupling in RF envelope detectors and high-frequency clock line protection. |
| Miniature SMD package | SOT323 footprint (2.0 × 1.25 mm) allows placement adjacent to ICs in dense power management modules. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) Input Clamping |
|---|---|
|
Use Scenario: Clamp inrush and load-dump transients on 24 V DC input rails in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-cathode diode provides symmetrical positive/negative voltage limiting relative to common anode ground reference. Use Value: 250 V VR rating absorbs 120 V load-dump spikes without avalanche conduction; ≤50 ns trr prevents latch-up in microcontroller I/O protection networks. |
Use Scenario: Reverse polarity protection for LIN bus transceivers and window motor drivers in 12 V automotive subsystems. IC Role / Device Role / Timing Role: Common-anode configuration enables single-device bidirectional blocking of battery reversal and ESD events. Use Value: ≤100 nA IR at 25 °C preserves sleep-mode current budget; SOT323 size fits tight fuse-box PCB real estate. |
| RF Signal Detector Circuits | Programmable Logic Interface Level Shifting |
|
Use Scenario: Demodulate AM signals in low-power wireless sensor nodes using envelope detection. IC Role / Device Role / Timing Role: Low-Cd (≤2 pF) diode acts as high-frequency rectifier in passive detector stage before op-amp amplification. Use Value: Minimal parasitic capacitance preserves Q-factor of LC tank circuits; fast trr avoids signal smearing above 10 MHz. |
Use Scenario: Translate 3.3 V logic outputs to 5 V or 12 V control lines in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Dual-diode structure isolates voltage domains while permitting bidirectional signal flow via shared anode. Use Value: 225 mA IF rating supports driving optocoupler LEDs directly; low VF (≤1.25 V @ 200 mA) minimizes level-shift voltage drop. |
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 MMBD2103 | Same SOT323 package, but single-diode; VR = 200 V, trr = 50 ns, Cd = 2.5 pF. | Lacks dual-cathode topology - requires two devices for common-anode function. | Select when only one high-voltage path is needed and board area permits discrete placement. |
| Diodes Incorporated BAV21W | Same dual-common-anode SOT323, VR = 250 V, but trr = 75 ns, IR = 100 nA, Cd = 2.5 pF. | Slower recovery limits use in >500 kHz switching; higher capacitance affects RF detector bandwidth. | Acceptable for lower-frequency clamping where cost sensitivity outweighs speed requirements. |
Compared with MMBD2103 and BAV21W, the BAS21AW uniquely combines dual-cathode topology, 250 V VR, and ≤50 ns trr in a single SOT323 device - delivering superior integration density and timing fidelity for compact high-voltage interface designs.
Availability
BAS21AW is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control module input clamping, RF signal detector circuits, and programmable logic interface level shifting requiring stable component supply and consistent SOT323 footprint compliance.
Supply support for BAS21AW 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-performance, reliable discrete, logic, and MOSFET components for automotive, industrial, and consumer applications.
The BAS21AW belongs to Nexperia's high-voltage switching diode product line, engineered specifically for compact, high-speed voltage clamping and reverse-polarity protection in space-constrained power interfaces.
FAQ
What is the maximum allowable junction temperature for BAS21AW?
The absolute maximum junction temperature (Tj) for BAS21AW is 150 °C, as specified in the Limiting Values table. Operation beyond this temperature risks permanent degradation of silicon characteristics and bond wire reliability. Derating curves in Figure 5 show forward current must be reduced linearly above Tamb = 25 °C to maintain Tj ≤ 150 °C.
Can BAS21AW be used in place of a single-diode SOT23 package?
No - BAS21AW uses a 3-pin SOT323 (SC-70) package with pins K1, K2, and CA, which differs mechanically and electrically from standard 3-pin SOT23. Its dual-cathode/common-anode topology also requires different PCB routing and cannot replicate single-diode functionality without circuit redesign.
Is BAS21AW qualified for automotive applications?
No - the official Nexperia datasheet states "Non-automotive qualified products" and explicitly disclaims suitability for automotive use unless expressly marked as AEC-Q101 qualified. BAS21AW lacks automotive-grade testing, qualification reports, and guaranteed PPAP documentation required for vehicle systems.
What is the typical forward voltage at 200 mA?
The typical forward voltage (VF) of BAS21AW is 1.25 V at IF = 200 mA and Tamb = 25 °C, as confirmed in Table 7 (Characteristics). This value reflects conduction loss per diode and is critical for calculating power dissipation in high-current protection paths.
BAS21AW,115 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 (DC)
- 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 (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BAS21AW,115 FAQ
1.How can I place an order for BAS21AW,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21AW,115 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,115 reliable?
The price and inventory of BAS21AW,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21AW,115 is usually 5 days.
3.What payment methods are accepted for BAS21AW,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21AW,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21AW,115?
BAS21AW,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21AW,115 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,115?
For technical support, including BAS21AW,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21AW,115 requirements.
6.How does Aetrix verify that BAS21AW,115 is sourced from the original manufacturer or authorized distributors?
All BAS21AW,115 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,115 meets industry standards.
7.What is the process for return or replacement of BAS21AW,115?
All BAS21AW,115 units undergo pre-shipment inspection (PSI). If there is an issue with BAS21AW,115, 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,115 part is unused and in its original packaging.
Return procedure for BAS21AW,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS21AW,115 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
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