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Taiwan Semiconductor Corporation BAS20 RFG
- Part No.:
- BAS20 RFG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS20 RFG.pdf
- Description:
- DIODE GEN PURP 150V 200MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:11,980
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Product details
Overview
BAS20 RFG from Taiwan Semiconductor is a surface-mount fast-switching diode rated for 200 mA forward current and 150 V repetitive peak reverse voltage in SOT-23 package, with 1.25 V forward voltage at 200 mA and 50 ns reverse recovery time - used in high-frequency switching nodes of offline SMPS secondary-side rectification.
For engineers reviewing the BAS20 RFG datasheet, BAS20 RFG pinout, BAS20 RFG application, or BAS20 RFG equivalent, key selection criteria include verified VRRM = 150 V, trr ≤ 50 ns, IF = 200 mA continuous, thermal resistance RθJA = 500 °C/W, and RoHS/halogen-free compliance per IEC 61249-2-21.
Technical Context
The BAS20 RFG implements a single-die silicon PN junction optimized for fast recovery in low-power switching applications. Its 50 ns reverse recovery time and 5 pF junction capacitance support operation up to several hundred kHz in flyback and forward converter topologies.
Rated for -65°C to +150°C junction temperature and 250 mW power dissipation at 25°C ambient, it uses matte tin-plated leads compliant with J-STD-002 solderability and meets JESD 201 Class 1A whisker resistance - suitable for reflow and wave soldering in automated SMT lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - supports input rectification in 115/230 VAC offline SMPS with margin against line transients |
| IF | 200 mA continuous - sufficient for auxiliary bias winding or low-current output rectification |
| VF @ 200 mA | 1.25 V - enables low conduction loss in low-voltage, high-efficiency auxiliary supplies |
| trr | 50 ns - ensures minimal switching loss and EMI in 100–500 kHz switching converters |
| CJ | 5 pF @ 0 V - reduces capacitive coupling and improves high-frequency noise immunity |
| RθJA | 500 °C/W - requires careful PCB copper area design for thermal management above 100 mW dissipation |
Pinout & Package
Package: SOT-23 - three-terminal plastic surface-mount package with standard JEDEC MO-215 outline; 8 ± 0.5 mg weight; UL 94 V-0 molding compound; matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to lower-potential node (e.g., transformer secondary cathode or ground-referenced switch node) |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Connected to higher-potential node (e.g., output rail or positive bias supply); carries full reverse voltage rating |
| Collector / Heat sink pad (Pin 3) | Thermal and electrical tie to cathode | SOT-23 Pin 3 is internally bonded to cathode - must be routed to same net as Pin 2 for mechanical stability and thermal path |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 50 ns - minimizes reverse conduction loss during hard-switched transitions in SMPS |
| Low forward voltage | 1.25 V @ 200 mA - reduces conduction loss in low-power auxiliary supplies without Schottky cost premium |
| Moisture sensitivity level 1 | No dry-pack or baking required before SMT assembly - lowers manufacturing overhead |
| Halogen-free construction | Complies with IEC 61249-2-21 - meets environmental requirements for industrial and consumer end equipment |
| High surge current capability | Withstands short-duration overcurrent events common during SMPS startup or fault conditions |
Applications
| SMPS Auxiliary Bias Supply | Low-Power Flyback Output Rectification |
|---|---|
Use Scenario: Providing isolated +12 V or +15 V bias to PWM controller ICs in offline AC/DC converters. IC Role / Device Role / Timing Role: Fast-switching output rectifier on auxiliary winding, operating at primary-side switching frequency. Use Value: 50 ns trr prevents reverse recovery-induced ringing that could disrupt controller feedback stability. | Use Scenario: Rectifying low-current (<200 mA), low-voltage (≤24 V) outputs in compact flyback adapters. IC Role / Device Role / Timing Role: Secondary-side unidirectional current valve synchronized to transformer reset phase. Use Value: 150 V VRRM provides 2× margin over reflected output voltage, enabling robust design without derating. |
| Industrial Sensor Power Rail | Programmable Logic Controller (PLC) Input Conditioning |
Use Scenario: Generating clean, isolated 3.3 V or 5 V rails for analog sensor front-ends in harsh environments. IC Role / Device Role / Timing Role: Low-loss rectifier in discrete charge-pump or flyback-derived bias generator. Use Value: 1.25 V VF limits self-heating under continuous 100–200 mA load, preserving long-term calibration stability. | Use Scenario: Protecting digital input circuitry from reverse polarity and transient overvoltage on 24 V DC field wiring. IC Role / Device Role / Timing Role: Polarity protection diode in series with optocoupler input stage. Use Value: 150 V VRRM withstands common-mode surges up to ±1 kV (IEC 61000-4-5 Level 3), reducing need for additional TVS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBD2004LT1G | VRRM = 200 V, trr = 50 ns, VF = 1.25 V @ 200 mA - higher reverse rating but identical speed and drop | Preferred where >150 V transient immunity is required, e.g., industrial mains-connected inputs | Select when system-level surge testing exceeds 150 V peak reverse stress |
| Diodes Incorporated BAV20W-7-F | VRRM = 150 V, trr = 50 ns, VF = 1.25 V @ 200 mA - same ratings, SOD-123 package (larger footprint, higher thermal mass) | Better thermal performance in high-ambient or high-duty-cycle bias supplies due to larger pad area | Choose when board space allows and junction temperature rise must stay below 80°C at 200 mA |
Compared with BAS20 RFG, MMBD2004LT1G offers higher reverse voltage headroom without sacrificing speed or forward loss, while BAV20W-7-F trades SOT-23 compactness for improved thermal dissipation in thermally constrained layouts - both require layout review for package compatibility.
Availability
BAS20 RFG is available at Aetrix Electronics and suitable for switching mode power supply (SMPS) auxiliary supplies, low-power flyback rectification, industrial sensor bias generation, and PLC input conditioning requiring stable component supply across production lifecycles.
Supply support for BAS20 RFG 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 semiconductor manufacturer specializing in discrete power devices, analog ICs, and LED drivers - headquartered in Hsinchu Science Park, Taiwan.
The BAS20 RFG belongs to TSC's fast-switching diode product line, engineered for high-frequency, low-loss rectification in compact AC/DC and DC/DC power conversion systems targeting cost-sensitive industrial and consumer applications.
FAQ
What is the maximum repetitive peak reverse voltage rating for BAS20 RFG?
The BAS20 RFG has a guaranteed repetitive peak reverse voltage (VRRM) of 150 V, verified per Taiwan Semiconductor's C2001 datasheet revision. This rating applies under standard test conditions (IR = 100 μA, TJ = 25°C) and defines the maximum sustained reverse-bias voltage the BAS20 RFG can block without breakdown. Designers should maintain ≥20% margin below this value for reliability in transient-prone environments.
Is BAS20 RFG RoHS and halogen-free compliant?
Yes, the BAS20 RFG is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the official Taiwan Semiconductor datasheet (Version C2001). The "G" suffix in BAS20 RFG explicitly denotes green compound packaging. This makes the BAS20 RFG suitable for export to EU, Japan, and other regions enforcing strict environmental regulations on brominated flame retardants and halogen content.
What is the reverse recovery time (trr) of BAS20 RFG and how is it measured?
The BAS20 RFG has a typical reverse recovery time (trr) of 50 ns, measured under standardized conditions: IF = IR = 30 mA, IRR = 0.1 × IR, per the Taiwan Semiconductor datasheet. This parameter reflects the diode's ability to transition from conduction to blocking state and directly impacts switching loss and EMI in high-frequency SMPS designs using the BAS20 RFG.
Does BAS20 RFG have moisture sensitivity level (MSL) restrictions for PCB assembly?
No - the BAS20 RFG is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/85% RH and requires no dry-packaging or baking prior to reflow soldering. This simplifies handling and eliminates process steps in high-volume SMT lines using the BAS20 RFG, supporting direct placement from reel into standard lead-free reflow profiles.
What is the thermal resistance (RθJA) of BAS20 RFG and how does it affect PCB layout?
The BAS20 RFG has a junction-to-ambient thermal resistance (RθJA) of 500 °C/W, measured on a standard FR-4 test board (1 cm² copper pad per pin). At 200 mA and 1.25 V forward drop, power dissipation reaches ~250 mW - resulting in ~125°C junction rise above ambient. To keep TJ ≤ 125°C, the BAS20 RFG requires enlarged copper pours on both anode and cathode pads, especially on inner layers, to reduce effective RθJA.
BAS20 RFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 150 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 @ 150 V
- Capacitance @ Vr, F:
- 5pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23
- Operating Temperature - Junction:
- -65°C ~ 150°C
BAS20 RFG FAQ
1.How can I place an order for BAS20 RFG through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS20 RFG 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 BAS20 RFG reliable?
The price and inventory of BAS20 RFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS20 RFG is usually 5 days.
3.What payment methods are accepted for BAS20 RFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS20 RFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS20 RFG?
BAS20 RFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS20 RFG 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 BAS20 RFG?
For technical support, including BAS20 RFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS20 RFG requirements.
6.How does Aetrix verify that BAS20 RFG is sourced from the original manufacturer or authorized distributors?
All BAS20 RFG 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 BAS20 RFG meets industry standards.
7.What is the process for return or replacement of BAS20 RFG?
All BAS20 RFG units undergo pre-shipment inspection (PSI). If there is an issue with BAS20 RFG, 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 BAS20 RFG part is unused and in its original packaging.
Return procedure for BAS20 RFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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