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Nexperia USA Inc. BAS21H-QX
- Part No.:
- BAS21H-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
BAS21H-QX.pdf
- Description:
- BAS21H-Q/SOD123F/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:6,563
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Product details
Overview
BAS21H-Q from Nexperia is a high-voltage switching diode in SOD123F package, rated for 200 V reverse voltage, 50 ns reverse recovery time, and 200 mA pulsed forward current; it serves as a fast, automotive-qualified switching element in DC-DC converter flyback snubbers and ECU power rail clamping circuits.
For engineers reviewing the BAS21H-Q datasheet, BAS21H-Q pinout, BAS21H-Q application, or BAS21H-Q equivalent, key selection criteria include reverse recovery speed under 30 mA test conditions, AEC-Q101 qualification status, thermal resistance to solder point (70 K/W), and cathode-marked SOD123F footprint compatibility with automated reflow assembly.
Technical Context
This discrete silicon switching diode employs a planar epitaxial construction optimized for high-voltage blocking and rapid minority-carrier removal. Its 50 ns trr is measured at IF = IR = 30 mA with 100 Ω load and 3 mA reverse current threshold, confirming suitability for 100–500 kHz switching topologies.
The device operates across −65 °C to +150 °C junction temperature range, with 100 nA reverse leakage at VR = 200 V and 25 °C, rising to 100 µA at 150 °C - a behavior critical for thermal stability in under-hood automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR | 200 V - maximum continuous reverse voltage; defines safe operating ceiling in 24 V/48 V automotive power rails |
| trr | 50 ns - reverse recovery time under standardized 30 mA/30 mA/100 Ω test; enables efficient operation up to ~500 kHz |
| IF(pulsed) | 200 mA - peak pulsed forward current (tp ≤ 300 µs, duty ≤ 2 %); supports transient surge handling in clamp circuits |
| IR @ 200 V | 100 nA @ 25 °C - ultra-low leakage ensures minimal standby power loss in always-on vehicle subsystems |
| Rth(j-sp) | 70 K/W - thermal resistance to cathode solder point; enables reliable power dissipation on FR4 PCB with standard footprint |
| VF @ 200 mA | 1.25 V - forward voltage at rated pulsed current; balances conduction loss and thermal rise in compact layouts |
| Ptot | 375 mW @ Tamb ≤ 25 °C - total power dissipation limit; constrains layout density and copper area requirements |
Pinout & Package
SOD123F package: surface-mount, 2-lead plastic case measuring 2.6 mm × 1.6 mm × 1.1 mm; flat leads, cathode marked by bar on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Marked side of package; connects to higher-potential node during reverse bias; carries return current path in clamp/snubber |
| 2 | Anode (A) | Unmarked terminal; connects to lower-potential node; source of forward conduction current in switching paths |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards |
| 50 ns trr | Enables low-loss switching in high-frequency DC-DC converters without requiring external snubbers |
| 100 nA IR @ 25 °C | Minimizes quiescent current drain in battery-backed systems such as CAN transceiver bias networks |
| SOD123F footprint | Compatible with IPC-7351B standard land pattern; supports 0.4 mm pitch reflow and AOI inspection |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Clamping inductive kickback from door lock solenoids and mirror actuators. IC Role / Device Role / Timing Role: Fast-switching voltage clamp protecting MCU GPIO and driver ICs from >200 V transients. Use Value: Prevents latch-up and permanent damage using sub-50 ns recovery to suppress spikes before system reset thresholds are exceeded. |
Use Scenario: Reverse polarity and overvoltage protection on 24 V digital input channels. IC Role / Device Role / Timing Role: Discrete front-end protection diode placed before optocoupler input stage. Use Value: Blocks >200 V reverse faults while maintaining <100 nA leakage to preserve signal integrity on high-impedance sensing nodes. |
| Automotive Infotainment Power Sequencing | Telecom DC-DC Converter Snubber |
Use Scenario: Voltage rail sequencing control and hold-up during cold-crank events (4.5 V–16 V). IC Role / Device Role / Timing Role: High-voltage steering diode in OR-ing and priority power path circuits. Use Value: Maintains stable 5 V/3.3 V supply to SoC during battery dip, leveraging 200 V VR margin for robustness against load dump coupling. |
Use Scenario: RCD snubber network across primary-side MOSFET in isolated flyback converters. IC Role / Device Role / Timing Role: Fast-recovery clamp diode dissipating stored inductive energy during MOSFET turn-off. Use Value: Limits voltage overshoot to <10 % above nominal bus with 50 ns trr, reducing stress on 600 V MOSFETs and improving efficiency. |
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 MMBD2102LT1G | 200 V VR, 75 ns trr, SOT-23 package, 150 °C Tj max | Larger package footprint; higher trr increases switching loss in >300 kHz designs | Preferred where board space allows larger SOT-23 and thermal margin exceeds 70 K/W |
| Vishay ES1D | 200 V VR, 35 ns trr, DO-214AC package, 1.0 A IF(AV) | Higher current rating but 3× larger footprint; not AEC-Q101 qualified | Selected when surge current >200 mA is required and automotive qualification is not mandatory |
Compared with MMBD2102LT1G and ES1D, BAS21H-Q uniquely combines AEC-Q101 qualification, SOD123F miniaturization, and 50 ns trr - making it optimal for space-constrained, thermally sensitive automotive ECUs where both reliability and high-frequency performance are non-negotiable.
Availability
BAS21H-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BAS21H-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 essential semiconductors - delivering discrete, logic, and MOSFET solutions rooted in automotive and industrial standards.
BAS21H-Q belongs to Nexperia's AEC-Q101-qualified high-voltage diode product line, engineered specifically for robust transient suppression and fast switching in harsh automotive environments.
FAQ
Is BAS21H-Q suitable for 48 V mild-hybrid vehicle power systems?
Yes. With 200 V reverse voltage rating and AEC-Q101 qualification, BAS21H-Q withstands load dump transients up to 250 V (VRRM) common in 48 V architectures. Its 150 °C max junction temperature and low 100 nA leakage at 25 °C ensure stable operation during extended under-hood thermal exposure.
What is the recommended reflow profile for BAS21H-Q?
Nexperia specifies reflow soldering only - no wave or hand-soldering. Peak temperature must not exceed 260 °C for ≤ 30 seconds, with ramp-up ≤ 3 °C/s and ramp-down ≤ 6 °C/s. The SOD123F package requires precise stencil design matching Figure 7 footprint: 2.8 mm × 1.2 mm solder lands with 0.55 mm spacing.
How does BAS21H-Q compare to standard 1N4148 in automotive use?
BAS21H-Q offers 10× higher VR (200 V vs. 100 V), 2× faster trr (50 ns vs. 4 ns - but measured under different conditions), and formal AEC-Q101 qualification - whereas 1N4148 lacks automotive validation and fails at >125 °C junction temperature. BAS21H-Q is not a drop-in replacement but a purpose-built upgrade for safety-critical 24 V/48 V systems.
Can BAS21H-Q be used in bidirectional TVS configurations?
No. BAS21H-Q is a unidirectional switching diode - not designed for symmetric breakdown or clamping in both polarities. Its 200 V VR rating applies only in reverse bias; forward conduction begins at ~1 V. For bidirectional transient suppression, dedicated TVS diodes like P6SMB200A are required.
BAS21H-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 250 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 200 V
- Capacitance @ Vr, F:
- 5pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
- Operating Temperature - Junction:
- 150°C
BAS21H-QX FAQ
1.How can I place an order for BAS21H-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21H-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 BAS21H-QX reliable?
The price and inventory of BAS21H-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21H-QX is usually 5 days.
3.What payment methods are accepted for BAS21H-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21H-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21H-QX?
BAS21H-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21H-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 BAS21H-QX?
For technical support, including BAS21H-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21H-QX requirements.
6.How does Aetrix verify that BAS21H-QX is sourced from the original manufacturer or authorized distributors?
All BAS21H-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 BAS21H-QX meets industry standards.
7.What is the process for return or replacement of BAS21H-QX?
All BAS21H-QX units undergo pre-shipment inspection (PSI). If there is an issue with BAS21H-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 BAS21H-QX part is unused and in its original packaging.
Return procedure for BAS21H-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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