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Nexperia USA Inc. BAS21QAZ
- Part No.:
- BAS21QAZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- 3-XDFN Exposed Pad
- Datasheet:
-
BAS21QAZ.pdf
- Description:
- DIODE GP 250V 330MA DFN1010D-3
- Quantity:
- Payment:
- Shipping:
Inventory:14,422
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Product details
Overview
BAS21QAZ from Nexperia is a high-voltage switching diode in a DFN1010D-3 (SOT1215) ultra-small leadless package, rated for 200 V reverse voltage, 330 mA forward current, and 50 ns reverse recovery time. It serves as a fast-switching, low-leakage clamping or polarity protection device in automotive power management and industrial DC-DC converter circuits.
For engineers reviewing the BAS21QAZ datasheet, BAS21QAZ pinout, BAS21QAZ application, or BAS21QAZ equivalent, key selection criteria include its AEC-Q101 qualification, 2 pF capacitance at 1 MHz, 100 nA reverse leakage at 200 V, and compatibility with AOI inspection due to visible side pads.
Technical Context
This diode employs a planar silicon epitaxial construction optimized for high-speed switching under repetitive pulsed conditions, with junction-to-solder-point thermal resistance of 45 K/W enabling reliable operation in thermally constrained layouts. Its 0.37 mm package height and dual cathode terminals support high-density routing on compact PCBs.
The device operates across −55 °C to +150 °C ambient, maintains ≤100 nA IR up to 150 °C, and delivers stable VF of 1.25 V at 200 mA - critical for low-loss rectification in flyback snubbers and reverse-battery protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 200 V - supports input stage clamping in 12 V/24 V automotive systems without breakdown. |
| Forward Current (IF) | 330 mA continuous - sufficient for signal-level switching and auxiliary rail protection in ECUs. |
| Reverse Recovery Time (trr) | 50 ns - enables clean commutation in >1 MHz DC-DC converters with minimal switching loss. |
| Reverse Leakage (IR) | 100 nA at 200 V, 25 °C - ensures negligible standby current in always-on battery monitoring circuits. |
| Diode Capacitance (Cd) | 2 pF at 0 V, 1 MHz - minimizes signal distortion in RF detector and high-frequency sampling applications. |
| Package | DFN1010D-3 (SOT1215), 1.1 × 1.0 × 0.37 mm - allows placement adjacent to ICs in space-constrained ADAS modules. |
| AEC-Q101 Qualified | Validated for automotive use - meets stress test requirements for temperature cycling, HTRB, and ESD. |
Pinout & Package
Encapsulated in a leadless DFN1010D-3 (SOT1215) plastic package with visible and solderable side pads, 0.37 mm profile, and thermal-enhanced cathode pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Primary P-side connection; routed to positive supply or signal source in clamping configurations. |
| 2 | No Connection (n.c.) | Internally isolated; no electrical function - used for mechanical stability and thermal relief. |
| 3 & 4 | Cathode (K) | Dual-terminal N-side connection; provides low-inductance return path and enhanced thermal conduction via shared pad. |
Key Features
| Feature | Design Value |
|---|---|
| High-speed switching | 50 ns trr enables use in 1–2 MHz SMPS topologies without efficiency penalty from minority-carrier storage. |
| Ultra-low leakage | 100 nA IR at 200 V ensures <1 µW standby dissipation in battery-backed sensor nodes over 10-year life. |
| AOI-compatible packaging | Visible side pads allow automated optical inspection of solder joints - eliminates X-ray requirement in Tier-1 production lines. |
| Thermal performance | 45 K/W Rth(j-sp) from junction to cathode solder point supports sustained 330 mA operation on 1 cm² copper pad. |
| AEC-Q101 qualification | Validated for automotive underhood environments - qualified per temperature cycling, HTGB, and AC-H3TRB tests. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Reverse polarity protection on 12 V power inputs to microcontroller-based door lock actuators. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage during battery jump-start misconnection. Use Value: Withstands 200 V transients while adding <0.5 mΩ series resistance and zero timing delay in fault path. |
Use Scenario: Clamping inductive kickback from 24 V solenoid drivers in programmable logic controllers. IC Role / Device Role / Timing Role: Fast-recovery snubber diode absorbing energy during MOSFET turn-off. Use Value: 50 ns trr limits voltage overshoot to <30 V above rail, protecting 30 V-rated gate drivers. |
| USB-C Power Delivery Adapter | Smart Meter Voltage Monitoring |
Use Scenario: High-side voltage clamping on CC line detection circuitry exposed to ±20 V ESD events. IC Role / Device Role / Timing Role: Transient voltage suppressor with sub-ns response and minimal parasitic capacitance. Use Value: 2 pF Cd avoids signal integrity degradation on 300 kHz USB PD communication lines. |
Use Scenario: Polarity guard on auxiliary 3.3 V LDO input fed from meter's internal battery backup system. IC Role / Device Role / Timing Role: Low-leakage blocking diode ensuring <100 nA drain during 10-year shelf life. Use Value: 100 nA IR at 25 °C and 150 °C guarantees battery runtime remains within spec across full temperature range. |
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 NSR20F20HT1G | 200 V VR, 200 mA IF, 4 ns trr, SOD-923 package (1.0 × 0.6 × 0.4 mm) | Lower IF rating and smaller footprint limit use to signal-level clamping only - not suitable for 330 mA power paths. | Select when board space is tighter than 1.0 × 1.0 mm and peak current stays below 200 mA. |
| Vishay ES1J | 600 V VRRM, 1 A IF, 35 ns trr, DO-214AA package (4.3 × 2.6 × 2.2 mm) | Larger size and higher VRRM increase parasitic inductance - degrades performance in >500 kHz switching nodes. | Choose only when system requires >250 V standoff or >500 mA average current, accepting 4× larger area. |
Compared with NSR20F20HT1G and ES1J, BAS21QAZ uniquely balances 200 V/330 mA rating, 50 ns speed, and 1.1 × 1.0 mm footprint - making it optimal for AEC-Q101-compliant, space-constrained automotive power interfaces where thermal and AOI constraints apply.
Availability
BAS21QAZ is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, and USB-C power delivery adapters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BAS21QAZ 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.
BAS21QAZ belongs to Nexperia's AEC-Q101-qualified high-voltage switching diode product line, engineered specifically for robustness in automotive power management, industrial control, and portable electronics where miniaturization and thermal efficiency are critical.
FAQ
Is BAS21QAZ pin-compatible with BAS21,115?
No. BAS21QAZ uses a 4-terminal DFN1010D-3 (SOT1215) package with dual cathode pins and one no-connect terminal, whereas BAS21,115 is in a 3-pin SOT23 package with anode-cathode-anode configuration. Physical layout, thermal path, and soldering footprint differ fundamentally - direct replacement requires PCB redesign.
What is the maximum allowable junction temperature during pulsed operation?
The absolute maximum junction temperature is 150 °C per IEC 60134. Under pulsed conditions (tp = 100 µs, δ ≤ 0.25), junction temperature rise is limited by Rth(j-a) = 205 K/W on a 1 cm² cathode pad; sustained operation above 130 °C requires derating per Figure 3 transient impedance curves.
Does BAS21QAZ support reflow soldering per JEDEC J-STD-020?
Yes. The DFN1010D-3 package is qualified for standard lead-free reflow profiles (peak 260 °C, 30 s max above 217 °C). Figure 11 provides the recommended solder land pattern, and thermal performance data assumes use of the specified 1 cm² cathode copper area per Nexperia's mounting guidelines.
Can BAS21QAZ be used in place of a Zener diode for voltage clamping?
No. BAS21QAZ is a switching diode with no controlled reverse breakdown characteristic. Its 250 V VRRM is a non-repetitive peak rating - it lacks the sharp, stable knee voltage of a Zener. For clamping, it functions only as a forward-biased or reverse-blocking element, not as a precision shunt regulator.
BAS21QAZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 3-XDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 250 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
- Supplier Device Package:
- DFN1010D-3
- Operating Temperature - Junction:
- 150°C (Max)
BAS21QAZ FAQ
1.How can I place an order for BAS21QAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21QAZ 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 BAS21QAZ reliable?
The price and inventory of BAS21QAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21QAZ is usually 5 days.
3.What payment methods are accepted for BAS21QAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21QAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21QAZ?
BAS21QAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21QAZ 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 BAS21QAZ?
For technical support, including BAS21QAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21QAZ requirements.
6.How does Aetrix verify that BAS21QAZ is sourced from the original manufacturer or authorized distributors?
All BAS21QAZ 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 BAS21QAZ meets industry standards.
7.What is the process for return or replacement of BAS21QAZ?
All BAS21QAZ units undergo pre-shipment inspection (PSI). If there is an issue with BAS21QAZ, 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 BAS21QAZ part is unused and in its original packaging.
Return procedure for BAS21QAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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