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Taiwan Semiconductor Corporation RS3KB-T
- Part No.:
- RS3KB-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
RS3KB-T.pdf
- Description:
- 500NS, 3A, 800V, FAST RECOVERY R
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
RS3KB-T from Taiwan Semiconductor is a fast recovery surface-mount rectifier diode with 800 V repetitive peak reverse voltage (VRRM), 3 A average forward current (IF), and 500 ns reverse recovery time (trr), designed for high-efficiency DC-DC converters and switching-mode power supplies operating at elevated temperatures up to 150 °C junction.
For engineers reviewing the RS3KB-T datasheet, RS3KB-T pinout, RS3KB-T application, or RS3KB-T equivalent, key selection criteria include its DO-214AA (SMB) package compatibility, low 1.13 V forward voltage at 3 A/25 °C, 80 A surge capability, and verified performance in high-frequency rectification where fast trr minimizes switching losses.
Technical Context
The RS3KB-T employs a single-die, glass-passivated silicon PN junction optimized for fast recovery (trr ≤ 500 ns) under IF = 0.5 A / IR = 1.0 A / Irr = 0.25 A test conditions. Its thermal design targets PCB-mounted operation with RθJA = 78 °C/W on a 10 mm × 10 mm copper pad.
It operates across –55 °C to +150 °C junction temperature range, supports 1.30 V max forward voltage at 3 A/25 °C, and exhibits ≤5 µA reverse leakage at 25 °C and rated VRRM, meeting J-STD-020 moisture sensitivity level 1 and RoHS/halogen-free compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum non-repetitive reverse voltage the device blocks reliably in circuit |
| IF | 3 A - Continuous average forward current rating at TA = 25 °C with adequate heatsinking |
| trr | 500 ns - Reverse recovery time defining switching speed and loss profile in SMPS |
| VF @ 3 A, 25 °C | 1.13 V - Forward voltage drop directly impacting conduction loss and thermal load |
| IFSM (8.3 ms) | 80 A - Non-repetitive surge current capability during startup or fault transients |
| RθJA | 78 °C/W - Junction-to-ambient thermal resistance on standard 10 mm × 10 mm Cu pad |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode indicated by band. Matte tin-plated leads, UL 94V-0 molding compound, 0.090 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of rectified path; must handle full IF and IFSM |
| Cathode | Forward current exit point / reverse voltage reference | Marked by band; ties to output rail or filter capacitor positive; withstands full VRRM |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and humidity resistance without hermetic sealing |
| Fast recovery (500 ns) | Reduces switching losses and EMI in high-frequency (>100 kHz) converter topologies |
| Low IR (≤5 µA @ 25 °C) | Minimizes standby power loss and improves efficiency in lightly loaded systems |
| J-STD-020 Level 1 MSL | Enables direct placement without baking; compatible with standard SMT reflow profiles |
Applications
| DC–DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 12–48 V outputs at 50–200 kHz. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary to regulated DC. Use Value: 500 ns trr and 1.13 V VF reduce conduction and switching losses, improving overall efficiency >90%. | Use Scenario: Output stage rectification in solar microinverters and UPS inverters operating at 16–50 kHz. IC Role / Device Role / Timing Role: Unidirectional current path enabling bidirectional energy flow control via complementary switching. Use Value: 150 °C TJ max and robust IFSM support sustained operation under grid-voltage surges and thermal cycling. |
| Industrial SMPS | AC–DC Adapters |
Use Scenario: Primary-side snubber or auxiliary supply rectification in industrial 24–48 V power modules. IC Role / Device Role / Timing Role: Fast-switching clamp diode absorbing leakage inductance spikes in flyback transformers. Use Value: Low CJ (50 pF) and fast trr limit ringing and improve snubber effectiveness. | Use Scenario: Output rectification in compact wall adapters for consumer electronics (e.g., 19 V/3 A laptop adapters). IC Role / Device Role / Timing Role: Surface-mount discrete rectifier replacing axial-leaded types to meet space and automation requirements. Use Value: DO-214AA (SMB) footprint enables automated placement and meets IPC Class 2 reliability standards. |
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 | 600 V VRRM, 3 A IF, 75 ns trr, TO-277 package | Lower voltage rating; faster recovery but higher VF (1.35 V @ 3 A) | Preferred where <600 V blocking suffices and ultra-fast switching dominates loss budget |
| ES3KB | 800 V VRRM, 3 A IF, 500 ns trr, same DO-214AA package | Identical electrical specs; different manufacturer marking and minor thermal resistance variance (RθJA = 80 °C/W) | Drop-in alternative with identical footprint and performance; suitable for dual-sourcing |
Compared with STTH3L06S and ES3KB, the RS3KB-T offers optimal balance of 800 V blocking, 500 ns recovery, and proven SMB-mount thermal performance-making it preferred for mid-voltage industrial SMPS where both voltage margin and thermal robustness are critical.
Availability
RS3KB-T is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial SMPS requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for RS3KB-T 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 power, automotive, and industrial markets since 1979.
The RS3KB-T belongs to TSC's RS3x series of fast recovery rectifiers, engineered specifically for high-efficiency, high-reliability switching power conversion in space-constrained and thermally demanding environments.
FAQ
What is the maximum junction temperature rating for the RS3KB-T?
The RS3KB-T has a maximum junction temperature (TJ) rating of +150 °C, validated per absolute maximum ratings table. This allows continuous operation in high-ambient industrial environments when mounted on appropriate PCB copper area. Derating curves confirm usable current down to 125 °C ambient with no forced airflow. The RS3KB-T maintains specified electrical parameters within this full range.
Does the RS3KB-T have a halogen-free and RoHS-compliant construction?
Yes, the RS3KB-T uses halogen-free molding compound per IEC 61249-2-21 and is fully RoHS compliant. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the entire assembly passes JESD 201 Class 1 whisker testing. These attributes are confirmed in the official Taiwan Semiconductor datasheet Version C2102.
What is the reverse recovery time (trr) specification for the RS3KB-T?
The RS3KB-T has a maximum reverse recovery time (trr) of 500 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. This value is consistent across the RS3KB-T and RS3MB-T variants and is critical for minimizing switching losses in converters operating above 50 kHz. The RS3KB-T datasheet confirms this parameter in the Electrical Specifications table.
Is the RS3KB-T pin-compatible with other devices in the RS3x family?
No-the RS3KB-T shares the same DO-214AA (SMB) package and anode/cathode terminal configuration with all RS3x-T parts (e.g., RS3DB-T, RS3MB-T), but voltage ratings differ. While mechanical pinout is identical, substituting RS3KB-T for a lower-VRRM variant may over-specify voltage margin, and using a lower-rated part risks breakdown. Always verify VRRM against system peak reverse stress before substitution.
What is the forward voltage (VF) of the RS3KB-T at 3 A and 125 °C?
The RS3KB-T exhibits a typical forward voltage of 0.94 V and a maximum of 1.14 V at IF = 3 A and TJ = 125 °C. This reduced VF versus room-temperature values reflects the negative temperature coefficient of silicon diodes and is essential for accurate thermal modeling. These values are explicitly listed in the Electrical Specifications section of the RS3KB-T datasheet.
RS3KB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 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):
- 500 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 800 V
- Capacitance @ Vr, F:
- 50pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
RS3KB-T FAQ
1.How can I place an order for RS3KB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for RS3KB-T 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 RS3KB-T reliable?
The price and inventory of RS3KB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS3KB-T is usually 5 days.
3.What payment methods are accepted for RS3KB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS3KB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RS3KB-T?
RS3KB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RS3KB-T 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 RS3KB-T?
For technical support, including RS3KB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS3KB-T requirements.
6.How does Aetrix verify that RS3KB-T is sourced from the original manufacturer or authorized distributors?
All RS3KB-T 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 RS3KB-T meets industry standards.
7.What is the process for return or replacement of RS3KB-T?
All RS3KB-T units undergo pre-shipment inspection (PSI). If there is an issue with RS3KB-T, 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 RS3KB-T part is unused and in its original packaging.
Return procedure for RS3KB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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