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Diodes Incorporated BAV21WS-7-F
- Part No.:
- BAV21WS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BAV21WS-7-F.pdf
- Description:
- DIODE GEN PURP 200V 200MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:180,121
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Product details
Overview
BAV21WS-7-F 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 translation circuits.
For engineers reviewing the BAV21WS-7-F datasheet, BAV21WS-7-F pinout, BAV21WS-7-F application, or BAV21WS-7-F equivalent, key selection criteria include its 250 V blocking capability, low 5.0 pF junction capacitance at 0 V, 1.25 V forward voltage at 200 mA, JEDEC-qualified reliability, and SOD323 footprint compatibility with automated assembly.
Technical Context
This diode employs a planar epitaxial silicon structure optimized for fast recovery and high-voltage standoff. Its 250 V VRRM enables use in 200 V DC-blocking stages, while the 50 ns tRR supports switching frequencies up to ~1 MHz in non-resonant topologies.
The device exhibits low leakage-15 µA IR at +100°C under 200 V VR-and maintains stable thermal resistance (625 °C/W) on standard FR-4 with 1-inch² copper pad. Its 200 mW power dissipation rating is derated linearly above +25°C ambient per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 250 V - Supports 200 V DC bus clamping and flyback voltage suppression without avalanche conduction. |
| tRR | 50 ns - Enables efficient operation in 500 kHz–1 MHz hard-switched converters with minimal switching loss. |
| CT | 5.0 pF @ 0 V - Minimizes capacitive loading in high-impedance signal routing and RF detector inputs. |
| IF (continuous) | 250 mA - Sustains peak forward current in transient clamp applications without thermal runaway. |
| RθJA | 625 °C/W - Requires minimum 1-inch² copper pour for full 200 mW power handling at +25°C ambient. |
| VF | 1.25 V @ 200 mA - Limits conduction loss to ≤250 mW in series-switch configurations. |
| IR | 15 µA @ +100°C, 200 V - Ensures low standby leakage in battery-backed hold-up and sensing circuits. |
Pinout & Package
Package: SOD323 - ultra-small plastic surface-mount package (1.30 × 1.70 × 0.95 mm), moisture sensitivity level 1, matte tin-plated alloy 42 leadframe, UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node in clamping or rectification path; no internal series resistance specified. |
| Cathode | Forward current exit / reverse voltage reference | Marked with cathode band; ties to higher-potential rail in clamp configuration or ground in rectifier output. |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage blocking | 250 V VRRM enables direct interface with 200 V industrial DC lines without external voltage dividers. |
| Fast recovery | 50 ns tRR reduces reverse recovery charge (Qrr) to <15 nC, minimizing cross-conduction loss in synchronous rectifiers. |
| Low junction capacitance | 5.0 pF at 0 V allows use in 100+ MHz RF detector and AM demodulator front-ends without signal attenuation. |
| JEDEC-qualified reliability | Qualified to AEC-Q101 stress test standards for high-reliability industrial and automotive auxiliary systems. |
| Green RoHS compliance | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb), fully lead-free, compliant with EU RoHS 3 (2015/863/EU). |
Applications
| DC-DC Converter Snubber | ESD Protection Clamp |
|---|---|
Use Scenario: Suppresses voltage spikes across MOSFET drains in flyback and boost converters operating at 300–500 kHz. IC Role / Device Role: Fast-recovery clamp diode placed between drain and primary winding to absorb leakage inductance energy. Use Value: 250 V VRRM withstands reflected output voltage plus margin; 50 ns tRR prevents secondary turn-on during dead time. |
Use Scenario: Protects I/O pins of microcontrollers and USB transceivers against ±8 kV HBM ESD events. IC Role / Device Role: Low-capacitance steering diode shunting transient current to VCC or GND rails. Use Value: 5.0 pF CT avoids signal integrity degradation on 10+ Mbps data lines; 15 µA IR ensures minimal standby current draw. |
| Voltage Translation Interface | Signal-Level Rectification |
Use Scenario: Level-shifts logic signals between 3.3 V and 5 V domains in mixed-supply sensor interfaces. IC Role / Device Role: Passive bidirectional clamp limiting voltage excursion beyond supply rails. Use Value: 1.25 V VF at 200 mA ensures <100 mV drop at typical interface currents; SOD323 footprint fits dense PCB layouts. |
Use Scenario: Demodulates low-amplitude AC signals (e.g., 100 kHz carrier from proximity sensors) into DC envelope. IC Role / Device Role: Signal-path rectifier with minimal forward threshold and parasitic capacitance. Use Value: 5.0 pF CT preserves high-frequency response; 50 ns tRR avoids distortion in >100 kHz envelope detection. |
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 - 50 V lower blocking rating than BAV21WS-7-F. | Suitable only for ≤150 V DC bus applications; not recommended where 200 V transients occur. | Select when system max reverse voltage is confirmed ≤150 V and cost optimization is prioritized. |
| 1N4148WS-7-F | 100 V VRRM, 4.0 pF CT, 4 ns tRR - lower voltage, faster, lower capacitance. | Better for <100 V, high-speed digital clamping but unsafe above 100 V reverse stress. | Choose for 3.3/5 V logic protection where speed > voltage rating; avoid in power-stage snubbers. |
Compared with BAV20WS-7-F and 1N4148WS-7-F, the BAV21WS-7-F uniquely balances 250 V standoff with sub-100 ns recovery and low capacitance-making it optimal for 200 V-class industrial power interfaces where both voltage margin and switching fidelity matter.
Availability
BAV21WS-7-F is available at Aetrix Electronics and suitable for DC-DC converter snubbers, ESD protection clamps, and voltage translation interfaces requiring stable component supply across industrial control, automotive body electronics, and IoT sensor modules.
Supply support for BAV21WS-7-F 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, manufacturing, and sales operations across Asia, Europe, and North America.
The BAV21WS-7-F belongs to Diodes' high-voltage fast-switching diode product line, engineered for robustness in industrial power conversion, automotive auxiliary systems, and ESD-critical signal paths where reliability under voltage stress is essential.
FAQ
Is BAV21WS-7-F suitable for automotive applications?
BAV21WS-7-F is qualified to AEC-Q101 for high-reliability stress testing but is not an automotive-grade part by default. For automotive use, select the Q-suffix variant (e.g., BAV21WSQ-7-F), which includes PPAP documentation, IATF 16949 manufacturing, and full AEC-Q200 qualification for passive components.
What is the maximum continuous forward current at +100°C ambient?
At +100°C ambient, the derated forward current is approximately 120 mA, calculated using the 625 °C/W thermal resistance and 200 mW power limit. Derating follows the linear curve in Figure 1 of DS30119 Rev. 23–2, with full rating only at ≤+25°C.
Does BAV21WS-7-F have a specified reverse recovery charge (Qrr)?
No Qrr value is published in the datasheet. However, based on tRR = 50 ns, IF = IR = 30 mA, and IRR = 3 mA, typical Qrr is estimated at <15 nC-consistent with fast-recovery diodes in this class and usable for qualitative loss estimation in switch-mode designs.
Can BAV21WS-7-F replace 1N4148 in high-voltage circuits?
Yes, but only where reverse voltage exceeds 100 V. The BAV21WS-7-F offers 2.5× higher VRRM than 1N4148 (100 V), making it safe for 200 V applications-but its 50 ns tRR is slower than 1N4148's 4 ns, so avoid in >10 MHz digital clamping where speed dominates.
BAV21WS-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- -65°C ~ 150°C
BAV21WS-7-F FAQ
1.How can I place an order for BAV21WS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BAV21WS-7-F 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-F reliable?
The price and inventory of BAV21WS-7-F 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-F is usually 5 days.
3.What payment methods are accepted for BAV21WS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAV21WS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAV21WS-7-F?
BAV21WS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAV21WS-7-F 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-F?
For technical support, including BAV21WS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAV21WS-7-F requirements.
6.How does Aetrix verify that BAV21WS-7-F is sourced from the original manufacturer or authorized distributors?
All BAV21WS-7-F 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-F meets industry standards.
7.What is the process for return or replacement of BAV21WS-7-F?
All BAV21WS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAV21WS-7-F, 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-F part is unused and in its original packaging.
Return procedure for BAV21WS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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BAV21W-7-F
Diodes Incorporated
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