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Diodes Incorporated BAV21WSQ-7-F
- Part No.:
- BAV21WSQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BAV21WSQ-7-F.pdf
- Description:
- DIODE GEN PURP 200V 200MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,939
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Product details
Overview
BAV21WSQ-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 clamping circuits.
For engineers reviewing the BAV21WSQ-7-F datasheet, BAV21WSQ-7-F pinout, BAV21WSQ-7-F application, or BAV21WSQ-7-F equivalent, key selection criteria include its 250 V VRRM, 50 ns tRR, 1.25 V VF @ 200 mA, 5.0 pF capacitance at 0 V, and SOD323 thermal resistance of 625 °C/W - all critical for high-speed, high-voltage clamp and snubber designs.
Technical Context
This diode operates as a unidirectional silicon PN junction device optimized for fast transient response and high-voltage blocking. Its 250 V VRRM enables use in 200 V DC-blocking paths, while 50 ns tRR supports switching frequencies up to ~10 MHz in clamp and snubber roles.
The SOD323 package delivers low thermal resistance (625 °C/W) and minimal parasitic capacitance (5.0 pF at 0 V), making it suitable for space-constrained, thermally sensitive applications where rapid turn-off and low charge storage are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 250 V - supports DC blocking in 200 V nominal systems with 25% safety margin |
| tRR | 50 ns - enables reliable operation in flyback snubbers switching at ≤10 MHz |
| VF | 1.25 V @ 200 mA - limits conduction loss to ≤250 mW in continuous 200 mA paths |
| CT | 5.0 pF @ 0 V - minimizes signal distortion in RF detector and high-speed clamp circuits |
| RθJA | 625 °C/W - requires ≤320 mW derated power at +85°C ambient on standard FR-4 |
| IO | 200 mA average - sustains continuous rectification in low-power auxiliary supplies |
| PD | 200 mW - defines maximum steady-state dissipation on 1-inch² copper pad |
Pinout & Package
Package: SOD323 - ultra-small surface-mount plastic package (1.30 × 1.70 × 0.95 mm), matte tin-plated alloy 42 leadframe, moisture sensitivity level 1, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to lower-potential node in clamping or rectifying path |
| Cathode (marked by band) | Forward current exit / reverse blocking terminal | Connected to higher-potential rail; absorbs reverse surge during switching transitions |
Key Features
| Feature | Design Value |
|---|---|
| High VRRM (250 V) | Enables direct replacement of legacy 200 V diodes in upgraded 24 V–48 V industrial power rails |
| Fast tRR (50 ns) | Reduces switching losses and ringing in high-frequency flyback snubbers and PWM gate drivers |
| SOD323 footprint | Provides 40% board area reduction vs. SOD123 while maintaining solder joint reliability |
| Lead-free & halogen-free | Meets IPC-J-STD-020 Level 1 moisture handling and automotive AEC-Q200 compatibility requirements |
Applications
| DC-DC Converter Snubber | ESD Protection Clamp |
|---|---|
Use Scenario: Placed across MOSFET drain-source in 48 V input flyback converters to suppress voltage spikes during turn-off. IC Role / Device Role / Timing Role: Fast-recovery clamp diode absorbing inductive energy and limiting dv/dt stress on primary switch. Use Value: 50 ns tRR and 250 V VRRM prevent secondary breakdown while minimizing clamping overshoot. | Use Scenario: Connected between I/O line and ground in USB 2.0 interface to shunt ESD transients per IEC 61000-4-2 Level 4. IC Role / Device Role / Timing Role: Low-capacitance (5.0 pF), high-VRRM clamping diode diverting ±8 kV contact discharge. Use Value: Sub-100 nA leakage at 200 V ensures no signal integrity degradation during normal operation. |
| Signal-Level Voltage Clamp | Low-Power Auxiliary Rectifier |
Use Scenario: Biased clamp protecting ADC input pins from overvoltage in sensor front-ends operating from ±15 V rails. IC Role / Device Role / Timing Role: Precision forward-threshold limiter with 1.25 V VF defining upper clamp level. Use Value: Tight VF tolerance and low CT preserve bandwidth and linearity in analog signal paths. | Use Scenario: Half-wave rectifier in isolated 5 V standby supply delivering ≤200 mA to microcontroller reset circuitry. IC Role / Device Role / Timing Role: General-purpose rectifier with 200 mA IO rating and thermal robustness on compact PCBs. Use Value: 200 mW PD and 625 °C/W RθJA support continuous operation without heatsinking. |
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 |
|---|---|---|---|
| BAV21W-7-F | Same electrical specs but non-automotive grade; no Q-suffix qualification | Lacks AEC-Q200 qualification and PPAP documentation support | Select when automotive change control and traceability are not required |
| 1N4148W-7-F | Lower VRRM (100 V), slower tRR (4 ns typical but not guaranteed at high VR) | Not rated for >150 V blocking; unsuitable for 48 V+ snubbers | Use only in ≤36 V logic-level clamping where speed dominates voltage rating |
Compared with BAV21WSQ-7-F, BAV21W-7-F offers identical performance without automotive compliance overhead, while 1N4148W-7-F trades voltage capability for slightly faster nominal tRR - making the Q-suffix part optimal for AEC-Q200-compliant 200–250 V clamp and snubber roles.
Availability
BAV21WSQ-7-F is available at Aetrix Electronics and suitable for automotive infotainment power management, industrial PLC I/O protection, and medical sensor interface circuits requiring stable component supply and AEC-Q200-compliant sourcing.
Supply support for BAV21WSQ-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, specializing in high-reliability, industry-qualified components for automotive, industrial, and computing markets.
The BAV21WSQ-7-F belongs to Diodes' high-voltage fast-switching diode product line, designed specifically for AEC-Q200-compliant clamping, snubbing, and protection in 24–48 V automotive and industrial power systems.
FAQ
What is the meaning of the 'Q' suffix in BAV21WSQ-7-F?
The 'Q' suffix denotes AEC-Q200 qualification, confirming that the device is manufactured in an IATF 16949-certified facility, supports PPAP documentation, and meets automotive-grade change control requirements - including extended temperature operation (−55°C to +150°C) and enhanced reliability testing beyond standard commercial parts.
Is BAV21WSQ-7-F pin-compatible with BAV21WS-7-F?
Yes - both share identical SOD323 package dimensions, anode/cathode terminal layout, and marking orientation. The only difference is qualification status: BAV21WSQ-7-F includes full AEC-Q200 documentation and traceability, while BAV21WS-7-F is commercial-grade with identical electrical and mechanical specifications.
Does this diode require derating above +25°C ambient?
Yes - power dissipation must be linearly derated above +25°C using the 625 °C/W thermal resistance. At +85°C ambient, maximum allowable PD drops to 125 mW (200 mW × [1 − (85−25)/625]), requiring careful layout with adequate copper area to maintain junction temperature below +150°C.
Can BAV21WSQ-7-F replace 1N4007 in high-voltage rectifier applications?
No - the 1N4007 is a 1 A, 1000 V general-purpose rectifier in DO-41 package, while BAV21WSQ-7-F is a 200 mA, 250 V fast-switching diode in SOD323. It lacks the surge current rating (IFSM = 1.7 A vs. 30 A) and thermal mass for mains-frequency rectification; it is intended for high-speed, low-current clamping-not bulk power conversion.
BAV21WSQ-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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- -55°C ~ 150°C
BAV21WSQ-7-F FAQ
1.How can I place an order for BAV21WSQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BAV21WSQ-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 BAV21WSQ-7-F reliable?
The price and inventory of BAV21WSQ-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 BAV21WSQ-7-F is usually 5 days.
3.What payment methods are accepted for BAV21WSQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAV21WSQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAV21WSQ-7-F?
BAV21WSQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAV21WSQ-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 BAV21WSQ-7-F?
For technical support, including BAV21WSQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAV21WSQ-7-F requirements.
6.How does Aetrix verify that BAV21WSQ-7-F is sourced from the original manufacturer or authorized distributors?
All BAV21WSQ-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 BAV21WSQ-7-F meets industry standards.
7.What is the process for return or replacement of BAV21WSQ-7-F?
All BAV21WSQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAV21WSQ-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 BAV21WSQ-7-F part is unused and in its original packaging.
Return procedure for BAV21WSQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAV21WSQ-7-F Tags
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BAV21W-7-F
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