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Taiwan Semiconductor Corporation BAV21W-G RHG
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- Part No.:
- BAV21W-G RHG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
BAV21W-G RHG.pdf
- Description:
- DIODE GEN PURP 200V 200MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:12,000
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Product details
Overview
BAV21W-G RHG from Taiwan Semiconductor is a high-voltage fast-switching silicon switching diode in SOD-123 package, rated for 250 V peak reverse voltage (VRM), 500 mW power dissipation, and 50 ns reverse recovery time (trr), used in flyback snubbers, DC-DC converter freewheeling paths, and ESD-protected signal clamping circuits.
For engineers reviewing the BAV21W-G RHG datasheet, BAV21W-G RHG pinout, BAV21W-G RHG application, or BAV21W-G RHG equivalent, key selection criteria include VRM = 250 V, trr < 50 ns, VF = 1.25 V @ IF = 200 mA, IR ≤ 0.1 μA @ VR = 200 V, and SOD-123 thermal resistance RθJA = 250°C/W.
Technical Context
This diode operates as a unidirectional, low-leakage, high-speed rectifier with a planar epitaxial structure optimized for fast turn-off. Its 250 V VRM rating supports use in 24–48 V industrial power rails with margin, while trr ≤ 50 ns enables operation up to ~1 MHz in hard-switched topologies.
The SOD-123 package features matte tin-plated terminals compliant with MIL-STD-202 Method 208, rated for 260°C/10s soldering, and moisture sensitivity level 1 - eliminating bake requirements prior to reflow. Junction capacitance is 2.5 pF at VR = 0 V, f = 1 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRM | 250 V - supports 200 V DC bus designs with 25% safety margin against transients |
| trr | ≤ 50 ns - enables efficient operation in 500 kHz–1 MHz SMPS flyback and boost converters |
| VF @ 200 mA | 1.25 V max - limits forward conduction loss to ≤250 mW at rated current |
| IR @ 200 V | ≤ 0.1 μA - ensures minimal leakage in high-impedance bias or sensing nodes |
| RθJA | 250°C/W - requires minimal copper area (≥25 mm²) for full-power operation at TA = 70°C |
| CJ @ 0 V | 2.5 pF - minimizes capacitive loading in high-frequency signal routing or RF detector inputs |
Pinout & Package
Package: SOD-123 - surface-mount plastic case with bent leads, 3.55–3.85 mm length, 1.4–1.8 mm width, 0.45–0.7 mm thickness, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck freewheel path) |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; ties to higher-potential rail (e.g., output capacitor positive) |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching | trr ≤ 50 ns ensures minimal switching loss in 1 MHz-class DC-DC controllers |
| High VRM rating | 250 V VRM supports 200 V nominal input systems (e.g., PoE++, industrial 24/48 V) |
| Low reverse leakage | IR ≤ 0.1 μA at 200 V preserves accuracy in high-impedance voltage divider or reference circuits |
| Halogen-free green compound | Pb-free, RoHS-compliant molding compound meets IPC-4101D/93 requirements |
| MSL Level 1 | No floor life limitation or pre-bake required - compatible with standard SMT reflow profiles |
Applications
| Switch-Mode Power Supply Snubber | ESD-Protected Signal Clamping |
|---|---|
Use Scenario: Clamp voltage spikes across MOSFET drains in flyback or forward converters. IC Role / Device Role: Fast-recovery snubber diode absorbing inductive kick energy. Use Value: 50 ns trr and 250 V VRM prevent secondary breakdown during 100–500 V transient events. | Use Scenario: Protect analog sensor inputs (e.g., thermistor, RTD) from ±8 kV HBM ESD. IC Role / Device Role: Low-capacitance (2.5 pF), low-leakage clamping diode to rail. Use Value: 0.1 μA IR avoids DC offset error; SOD-123 footprint fits tight-layout sensor modules. |
| DC-DC Converter Freewheel Path | High-Voltage Bias Supply Rectification |
Use Scenario: Provide freewheeling path in 48 V input buck converters operating at 500 kHz. IC Role / Device Role: Unidirectional current path during low-side switch off-time. Use Value: 1.25 V VF at 200 mA yields <250 mW conduction loss; 250°C/W RθJA allows 70°C ambient operation. | Use Scenario: Rectify 100–200 V AC-derived bias for gate drivers or optocouplers. IC Role / Device Role: High-VRM discrete rectifier replacing small-signal bridge sections. Use Value: 250 V VRM exceeds 200 V peak input; 500 mW PD supports 10 mA continuous output. |
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 |
|---|---|---|---|
| BAV20W-G | VRM = 200 V (vs. 250 V); otherwise identical trr, VF, and package | Not suitable for 200 V DC bus designs requiring >20% transient margin | Select BAV20W-G only when VRM ≥ 200 V suffices and cost optimization is prioritized |
| 1N4148W | VRM = 100 V, trr = 4 ns (faster), but VF = 1.0 V @ 10 mA - not rated for 200 mA continuous | Limited to low-current (<75 mA), low-voltage (<75 V) signal switching | Use 1N4148W only in logic-level clamping or low-power timing circuits - not for power rectification |
Compared with BAV20W-G and 1N4148W, the BAV21W-G RHG uniquely balances 250 V robustness, 50 ns speed, and 200 mA current capability in SOD-123 - making it the sole option among the three qualified for 48 V–200 V industrial power conversion.
Availability
BAV21W-G RHG is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, high-voltage bias networks, and ESD-hardened communication ports requiring stable component supply and long-term manufacturability.
Supply support for BAV21W-G RHG 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in high-reliability power devices and small-signal components.
The BAV21W-G RHG belongs to TSC's Small Signal Product family, engineered for high-voltage, fast-switching applications in industrial power conversion, automotive subsystems, and ruggedized IoT edge nodes.
FAQ
What is the maximum peak reverse voltage rating for BAV21W-G RHG?
The BAV21W-G RHG has a maximum peak reverse voltage (VRM) rating of 250 V. This value is specified in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version D1603) and defines the highest repetitive voltage the diode can block without breakdown. It is critical for selecting appropriate voltage margin in 48 V or 100 V DC bus applications where transient spikes must be safely absorbed.
What is the reverse recovery time (trr) of BAV21W-G RHG and how is it measured?
The BAV21W-G RHG has a reverse recovery time (trr) of ≤ 50 ns, tested under conditions of IF = IR = 30 mA, RL = 100 Ω, and IRR = 3 mA per the datasheet. This parameter reflects the diode's ability to transition from forward conduction to reverse blocking, directly impacting switching losses in high-frequency converters. The measurement confirms suitability for operation up to 1 MHz in hard-switched topologies.
Is BAV21W-G RHG RoHS compliant and what does the 'G' suffix indicate?
Yes, BAV21W-G RHG is Pb-free and RoHS compliant. The 'G' suffix denotes halogen-free green compound packaging material, verified per IPC-4101D/93 standards. This ensures environmental compliance and eliminates brominated flame retardants, supporting modern electronics manufacturing requirements without compromising thermal or mechanical performance.
What is the thermal resistance (RθJA) of BAV21W-G RHG and how does it affect PCB layout?
The junction-to-ambient thermal resistance (RθJA) of BAV21W-G RHG is 250°C/W, measured on a standard FR-4 board with no added copper. This means a 500 mW power dissipation will raise junction temperature by 125°C above ambient. To maintain TJ ≤ 150°C at TA = 70°C, designers must provide ≥25 mm² of 1-oz copper connected to at least one pad - verified in TSC's suggested pad layout documentation.
How is polarity marked on the BAV21W-G RHG SOD-123 package?
Polarity on the BAV21W-G RHG is indicated by a cathode band printed on the package body - a visible dark stripe near one end of the SOD-123 case. Per mechanical drawings, this band aligns with the cathode terminal, which must connect to the higher-potential node in circuit operation. The anode is the unmarked terminal, and correct orientation is essential to avoid reverse conduction failure in rectifier or clamp configurations.
BAV21W-G RHG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- 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-123
- Operating Temperature - Junction:
- -65°C ~ 150°C
BAV21W-G RHG FAQ
1.How can I place an order for BAV21W-G RHG through Aetrix?
Please submit a Request for Quotation (RFQ) for BAV21W-G RHG 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 BAV21W-G RHG reliable?
The price and inventory of BAV21W-G RHG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAV21W-G RHG is usually 5 days.
3.What payment methods are accepted for BAV21W-G RHG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAV21W-G RHG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAV21W-G RHG?
BAV21W-G RHG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAV21W-G RHG 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 BAV21W-G RHG?
For technical support, including BAV21W-G RHG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAV21W-G RHG requirements.
6.How does Aetrix verify that BAV21W-G RHG is sourced from the original manufacturer or authorized distributors?
All BAV21W-G RHG 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 BAV21W-G RHG meets industry standards.
7.What is the process for return or replacement of BAV21W-G RHG?
All BAV21W-G RHG units undergo pre-shipment inspection (PSI). If there is an issue with BAV21W-G RHG, 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 BAV21W-G RHG part is unused and in its original packaging.
Return procedure for BAV21W-G RHG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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