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Diodes Incorporated BAV21WS-7
- Part No.:
- BAV21WS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BAV21WS-7.pdf
- Description:
- DIODE GEN PURP 200V 200MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,554
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Product details
Overview
BAV21WS-7 from Diodes Incorporated is a surface-mount high-voltage fast-switching diode in SOD323 package, rated for 250 V repetitive peak reverse voltage (VRRM), 200 mA average rectified current (IO), and 50 ns reverse recovery time (tRR). It serves as a general-purpose switching diode in DC-DC converter flyback snubbers, ESD protection clamps, and signal-level voltage clamping circuits.
For engineers reviewing the BAV21WS-7 datasheet, BAV21WS-7 pinout, BAV21WS-7 application, or BAV21WS-7 equivalent, key selection criteria include its 250 V VRRM, low 5.0 pF capacitance at 0 V, 1.25 V max forward voltage at 200 mA, thermal resistance of 625 °C/W, and JEDEC-qualified reliability for industrial power management designs.
Technical Context
This diode operates as a unidirectional silicon PN junction device optimized for high-speed switching with minimal charge storage. Its 50 ns tRR enables use in 100 kHz–1 MHz switching topologies where reverse recovery loss must be constrained.
Rated for 250 V VRRM and 200 V VRWM, it supports DC blocking in auxiliary power rails and transient suppression in 24 V/48 V industrial control I/O stages. The SOD323 package provides 0.004 g mass and J-STD-020 Level 1 moisture sensitivity for reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 250 V - Withstands repetitive reverse transients up to this voltage without breakdown |
| tRR | 50 ns - Enables efficient operation in medium-frequency switching circuits with low recovery loss |
| VF @ 200 mA | 1.25 V max - Limits conduction loss in series-clamp or freewheeling paths carrying ≤200 mA |
| CT @ 0 V | 5.0 pF - Minimizes capacitive loading on high-impedance signal nodes and timing circuits |
| IO | 200 mA avg - Supports continuous rectification in low-power auxiliary supplies and bias networks |
| RθJA | 625 °C/W - Requires minimal copper area (1-inch² pad) for thermal management at full power |
| TJ Range | −55 °C to +150 °C - Qualified for extended-temperature industrial and automotive-adjacent environments |
Pinout & Package
Package: SOD323 - ultra-small surface-mount plastic case (1.30 × 1.70 × 0.95 mm), matte tin-plated alloy 42 leadframe, cathode indicated by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal | Connected to lower-potential node in clamping or rectifying path; requires PCB trace capable of 200 mA continuous |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with band; ties to higher-potential rail or transient return path; defines polarity-sensitive placement |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | 50 ns tRR reduces switching loss in 100–500 kHz power stages |
| High VRRM | 250 V rating supports use in 48 V system snubbers and 24 V industrial I/O protection |
| SOD323 footprint | 0.004 g mass and 1.30 × 1.70 mm outline enable dense layout in space-constrained modules |
| JEDEC-qualified reliability | Meets AEC-Q200 stress test requirements for high-reliability industrial applications |
| Halogen- & antimony-free | <900 ppm Br/Cl, <1000 ppm Sb - compliant with "Green" manufacturing standards |
Applications
| DC-DC Converter Snubber | Industrial I/O Protection |
|---|---|
Use Scenario: Clamping voltage spikes across MOSFET drains in flyback or buck-boost converters operating at 200–500 kHz. IC Role / Device Role / Timing Role: Fast-recovery clamp diode absorbing inductive energy during switch turn-off. Use Value: 50 ns tRR and 250 V VRRM prevent secondary breakdown while minimizing ringback overshoot. |
Use Scenario: Protecting 24 V PLC digital input channels against ESD and inductive kickback from solenoid loads. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor (with series resistor) limiting line-to-ground excursions. Use Value: Low 5.0 pF capacitance avoids signal integrity degradation on 100 kHz–1 MHz sensor inputs. |
| Signal-Level Voltage Clamp | Low-Power Auxiliary Rectifier |
Use Scenario: Limiting analog sensor output swing to MCU ADC input range (e.g., ±3.3 V rail clamping). IC Role / Device Role / Timing Role: Precision forward-biased clamp diode defining upper/lower voltage bounds. Use Value: 1.25 V VF max at 200 mA ensures predictable clamping threshold under load. |
Use Scenario: Rectifying 12 V AC from small transformers in low-current bias supplies (<200 mA). IC Role / Device Role / Timing Role: Half-wave rectifier delivering DC to LDOs or op-amp bias networks. Use Value: 200 mA IO rating and 625 °C/W RθJA support continuous operation on minimal PCB copper. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage fast-switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAV20WS-7-F | 200 V VRRM, 150 V VRWM, identical tRR and package | Limited to ≤48 V systems; unsuitable for 24 V bus transients exceeding 200 V | Select when 200 V blocking suffices and cost optimization is prioritized |
| 1N4148W-7-F | 100 V VRRM, 4 nA IR @ 100 °C, same SOD323 package | Not rated for >100 V applications; higher leakage degrades high-impedance sensing | Use only in ≤30 V logic-level clamping where ultra-low leakage is critical |
Compared with BAV20WS-7-F and 1N4148W-7-F, BAV21WS-7 offers the highest blocking voltage (250 V) and lowest capacitance (5.0 pF) among SOD323 fast diodes, making it optimal for 48 V industrial snubbers and precision clamping where voltage margin and signal fidelity are both critical.
Availability
BAV21WS-7 is available at Aetrix Electronics and suitable for DC-DC converter snubbers, industrial I/O protection circuits, signal-level voltage clamping, and low-power auxiliary rectifiers requiring stable component supply across production lifecycles.
Supply support for BAV21WS-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing facilities across Asia and the Americas.
BAV21WS belongs to Diodes' high-voltage fast-switching diode product line, engineered specifically for industrial power conversion, transient suppression, and signal conditioning applications demanding robustness and consistent switching performance.
FAQ
What is the maximum allowable junction temperature for BAV21WS-7?
The BAV21WS-7 has an operating junction temperature range of −55 °C to +150 °C per datasheet DS30119 Rev. 23. At 200 mW power dissipation and 625 °C/W thermal resistance, junction temperature rise is 125 °C above ambient-so maximum ambient must be limited to +25 °C for safe operation at full power without derating.
Is BAV21WS-7 suitable for automotive applications?
BAV21WS-7 is not AEC-Q200 qualified; however, Diodes offers the automotive-grade BAV21WSQ-7-F variant, which is PPAP-capable and manufactured in IATF 16949-certified facilities. The standard BAV21WS-7 meets JEDEC reliability standards but lacks automotive-specific qualification documentation and change control.
How does the SOD323 package affect soldering process compatibility?
The SOD323 package has J-STD-020 Level 1 moisture sensitivity and uses matte tin-plated alloy 42 leads, making it compatible with standard Pb-free reflow profiles (peak 260 °C). Its 0.30 mm lead width and 0.25–0.35 mm pitch require precise stencil aperture design and 0.15 mm solder paste thickness for reliable joint formation.
What is the typical reverse leakage current at elevated temperature?
At TJ = +100 °C and rated VRWM (200 V), the BAV21WS-7 exhibits ≤15 µA peak reverse current (IR), per DS30119 Rev. 23. This is significantly higher than its 100 nA value at +25 °C, confirming strong temperature dependence-critical for high-temp bias network design where leakage-induced offset must be modeled.
BAV21WS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 200mA
- 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:
- 5pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- -65°C ~ 150°C
BAV21WS-7 FAQ
1.How can I place an order for BAV21WS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAV21WS-7 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 BAV21WS-7 reliable?
The price and inventory of BAV21WS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAV21WS-7 is usually 5 days.
3.What payment methods are accepted for BAV21WS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAV21WS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAV21WS-7?
BAV21WS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAV21WS-7 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 BAV21WS-7?
For technical support, including BAV21WS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAV21WS-7 requirements.
6.How does Aetrix verify that BAV21WS-7 is sourced from the original manufacturer or authorized distributors?
All BAV21WS-7 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 BAV21WS-7 meets industry standards.
7.What is the process for return or replacement of BAV21WS-7?
All BAV21WS-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAV21WS-7, 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 BAV21WS-7 part is unused and in its original packaging.
Return procedure for BAV21WS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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