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Taiwan Semiconductor Corporation RS3B
- Part No.:
- RS3B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
RS3B.pdf
- Description:
- DIODE GEN PURP 100V 3A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,819
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Product details
Overview
RS3B from Taiwan Semiconductor is a fast recovery surface-mount rectifier diode with 100 V repetitive peak reverse voltage (VRRM), 3 A average forward current (IF), and 150 ns reverse recovery time (trr), designed for high-efficiency switching mode power supplies and snubber circuits.
For engineers reviewing the RS3B datasheet, RS3B pinout, RS3B application, or RS3B equivalent, key selection factors include its DO-214AB (SMC) package, 100 V VRRM rating, 1.3 V max forward voltage at 3 A, 100 A peak surge capability, and suitability for DC-DC converters and lighting inverters.
Technical Context
The RS3B is a single-die, glass-passivated fast recovery rectifier optimized for high-frequency switching applications. It delivers 150 ns reverse recovery time at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, with a maximum forward voltage of 1.3 V at 3 A and 25°C junction temperature.
Thermally, it features a junction-to-lead resistance of 15 °C/W and junction-to-ambient resistance of 50 °C/W. Its DO-214AB (SMC) package supports automated placement and meets J-STD-020 moisture sensitivity level 1 and UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum non-repetitive reverse voltage the device blocks reliably in circuit |
| IF | 3 A - Continuous average forward current under specified thermal conditions |
| trr | 150 ns - Fast reverse recovery enables efficient operation in ≥100 kHz SMPS topologies |
| VF (max) | 1.3 V @ 3 A, 25°C - Low conduction loss improves system efficiency and reduces heat sink requirements |
| IFSM | 100 A - Withstands short-duration surge currents during power-up or fault transients |
| TJ max | +175°C - Enables reliable operation in high-temperature industrial and automotive under-hood environments |
| RθJL | 15 °C/W - Low thermal resistance from junction to lead supports high-power dissipation in compact layouts |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode-indicated by molded band, matte tin-plated leads, 0.210 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of rectification path; requires PCB trace capable of 3 A continuous current |
| Cathode | Forward current exit / reverse voltage blocking terminal | Marked by visible band; connects to output rail or snubber node; must maintain clearance per 100 V working voltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and humidity resistance without hermetic sealing |
| Fast 150 ns recovery | Reduces switching losses and EMI in high-frequency converters (e.g., 200–500 kHz) |
| DO-214AB (SMC) package | Supports automated SMT assembly and provides higher power density than DO-41 or SMA |
| J-STD-020 Level 1 MSL | Enables standard reflow without baking or special handling prior to assembly |
| RoHS & halogen-free | Complies with environmental regulations for industrial and consumer end equipment |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs at up to 100 W. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 150 ns trr minimizes reverse recovery loss; 1.3 V VF reduces conduction loss vs. standard recovery diodes. | Use Scenario: Output stage in LED driver inverters for commercial lighting systems operating at 25–100 kHz. IC Role / Device Role / Timing Role: Freewheeling and polarity control diode in half-bridge or full-bridge configurations. Use Value: 100 V VRRM safely handles reflected spikes; 100 A IFSM withstands lamp-strike surges. |
| Snubber Network | General Purpose Rectification |
Use Scenario: Clamp diode in RCD snubber across MOSFETs in PFC or LLC resonant stages. IC Role / Device Role / Timing Role: Fast turn-off path for transient energy dissipation during switch turn-off. Use Value: 150 ns trr ensures rapid voltage clamping before MOSFET avalanche; low VF avoids excessive snubber loss. | Use Scenario: Input bridge rectification in auxiliary power supplies for industrial controllers and IoT gateways. IC Role / Device Role / Timing Role: Unidirectional current steering in AC/DC front-end conversion. Use Value: DO-214AB footprint allows direct replacement of legacy SMA/SMB devices; 175°C TJ max supports sealed enclosure operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S (STMicroelectronics) | 600 V VRRM, 3 A IF, 75 ns trr, same DO-214AB package | Higher voltage rating suits 400 V bus designs; faster recovery targets >500 kHz operation | Select when higher VRRM or lower trr is required; verify layout compatibility with identical footprint |
| ES3B (Vishay) | 100 V VRRM, 3 A IF, 150 ns trr, DO-214AB package, 1.25 V VF max | Nearly identical electrical specs; slightly lower VF improves efficiency marginally | Drop-in alternative with proven field reliability; confirm RoHS/halogen status matches design requirements |
Compared with STTH3L06S and ES3B, the RS3B offers balanced performance for 100 V applications with industry-standard thermal and mechanical specs, while ES3B provides marginal VF advantage and STTH3L06S extends voltage headroom at the cost of higher trr sensitivity in low-VRRM use cases.
Availability
RS3B is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and snubber networks requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for RS3B 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, serving global industrial, computing, and consumer markets since 1979.
The RS3B belongs to TSC's RS3x fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in space-constrained surface-mount applications.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for RS3B?
The RS3B has a VRRM rating of 100 V, meaning it can reliably block up to 100 V of reverse voltage in repetitive operation. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version M2304) and is specific to the RS3B variant-other members of the RS3x series have different VRRM values ranging from 50 V to 1000 V.
What is the reverse recovery time (trr) of RS3B and under what test conditions?
The RS3B has a reverse recovery time (trr) of 150 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is explicitly listed in the Electrical Specifications section of the Taiwan Semiconductor RS3A–RS3M datasheet (Version M2304) and distinguishes RS3B from slower variants like RS3J (250 ns) and RS3K/RS3M (500 ns).
Is RS3B compatible with lead-free reflow soldering processes?
Yes, RS3B is compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its moisture sensitivity level is rated J-STD-020 Level 1-meaning it can be subjected to standard Pb-free reflow profiles (e.g., JEDEC J-STD-020) without pre-baking. The DO-214AB (SMC) package also complies with UL 94V-0 flammability standards.
What is the thermal resistance from junction to ambient (RθJA) for RS3B?
The junction-to-ambient thermal resistance (RθJA) for RS3B is 50 °C/W, as specified in the Thermal Performance section of the Taiwan Semiconductor datasheet (Version M2304). This value assumes standard PCB mounting on FR-4 with minimum copper area; actual RθJA will improve with enhanced copper pour or thermal vias.
Does RS3B have a halogen-free and RoHS-compliant construction?
Yes, RS3B is both halogen-free and RoHS compliant, as stated in the Features section of the official Taiwan Semiconductor RS3A–RS3M datasheet (Version M2304). These compliance attributes are verified per applicable regulatory standards and apply to the entire device-including molding compound, die attach, and lead finish-making RS3B suitable for environmentally regulated industrial and consumer products.
RS3B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS3B FAQ
1.How can I place an order for RS3B through Aetrix?
Please submit a Request for Quotation (RFQ) for RS3B 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 RS3B reliable?
The price and inventory of RS3B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS3B is usually 5 days.
3.What payment methods are accepted for RS3B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS3B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS3B?
RS3B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS3B 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 RS3B?
For technical support, including RS3B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS3B requirements.
6.How does Aetrix verify that RS3B is sourced from the original manufacturer or authorized distributors?
All RS3B 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 RS3B meets industry standards.
7.What is the process for return or replacement of RS3B?
All RS3B units undergo pre-shipment inspection (PSI). If there is an issue with RS3B, 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 RS3B part is unused and in its original packaging.
Return procedure for RS3B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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