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Taiwan Semiconductor Corporation PU2BA
- Part No.:
- PU2BA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
PU2BA.pdf
- Description:
- 25NS, 2A, 100V, ULTRA FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
PU2BA from Taiwan Semiconductor is a 2 A, 100 V ultra-fast surface-mount rectifier diode in DO-214AC (SMA) package, featuring 25 ns reverse recovery time, 0.87 V forward voltage at 2 A/25°C, and 50 A surge current capability. It serves as a high-efficiency freewheeling or snubber diode in DC/DC converters operating at high switching frequencies.
For engineers reviewing the PU2BA datasheet, PU2BA pinout, PU2BA application, or PU2BA equivalent, key selection criteria include its 100 V repetitive peak reverse voltage, ultra-fast trr ≤25 ns, low VF at elevated temperature, thermal resistance RθJA = 78 °C/W on standard PCB, and RoHS/halogen-free compliance for industrial power conversion designs.
Technical Context
The PU2BA employs planar silicon technology to achieve fast soft-recovery characteristics with low stored charge (Qrr = 31 nC) and minimal reverse recovery current (IRM = 3.6 A). Its single-die configuration and DO-214AC package support automated SMT assembly while maintaining robust thermal performance up to TJ = 175 °C.
Designed for high-frequency operation, the PU2BA delivers stable reverse leakage (<2 µA at 25°C, <10 µA at 125°C) and low junction capacitance (CJ = 33 pF at 4 V), enabling reliable performance in snubber networks and synchronous rectification auxiliary paths where rapid turn-off and low capacitive loading are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse voltage; defines safe blocking capability in DC/DC flyback or boost stages |
| IF | 2 A continuous - Average forward current rating; supports compact 2 A power rail rectification without heatsink |
| trr | ≤25 ns - Ultra-fast reverse recovery time; minimizes switching losses and EMI in >100 kHz converters |
| VF @ 2A/25°C | 0.87 V max - Low forward drop reduces conduction loss and improves system efficiency at full load |
| RθJA | 78 °C/W - Junction-to-ambient thermal resistance on 5 mm × 5 mm Cu pad; enables thermal design without forced air |
| Qrr | 31 nC - Reverse recovery charge; directly impacts turn-off loss and snubber sizing in hard-switched topologies |
| IR @ 100V/25°C | ≤2 µA - Low leakage ensures minimal standby power loss in high-impedance bias or sensing circuits |
Pinout & Package
DO-214AC (SMA) surface-mount package with molded epoxy case (UL 94V-0), matte tin-plated leads, and cathode band polarity marking. Weight: 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to lower-potential node (e.g., switch node in buck converter); requires adequate copper pour for thermal relief |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to output rail or ground return; must withstand full VRRM during off-state |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery (trr ≤25 ns) | Reduces switching loss and ringing in high-frequency DC/DC converters above 200 kHz |
| Low Qrr (31 nC) | Minimizes energy dissipated during diode turn-off, lowering MOSFET stress in synchronous rectifiers |
| High TJ max (175 °C) | Enables operation in thermally constrained environments such as enclosed industrial power supplies |
| Moisture sensitivity level 1 | Eliminates bake requirement before reflow, supporting standard J-STD-020 assembly flow |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives for environmentally regulated end equipment |
Applications
| DC/DC Converter Output Rectification | Snubber Network Diode |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V at up to 2 A. IC Role / Device Role / Timing Role: Freewheeling diode conducting during transformer reset phase; handles discontinuous conduction mode transitions. Use Value: 25 ns trr and low Qrr reduce voltage overshoot across primary switch, improving reliability and easing EMI filter design. | Use Scenario: Clamp diode in RCD snubber across MOSFET drain-source in offline SMPS. IC Role / Device Role / Timing Role: Fast turn-on/turn-off element absorbing leakage inductance energy during switch turn-off. Use Value: Sub-30 ns trr ensures rapid conduction onset before voltage spike peaks, minimizing snubber loss and component stress. |
| High-Frequency Inverter Auxiliary Path | Industrial Sensor Power Supply |
Use Scenario: Isolation barrier auxiliary supply in motor drive inverters using transformer-coupled gate drivers. IC Role / Device Role / Timing Role: High-speed rectifier feeding low-power bias rails; operates at 100–500 kHz switching frequency. Use Value: 33 pF junction capacitance limits displacement current, preventing false triggering of gate drivers under fast dv/dt conditions. | Use Scenario: Input-stage rectification for 24 V AC/DC sensor interface modules in factory automation. IC Role / Device Role / Timing Role: Primary AC input rectifier handling 50/60 Hz line frequency plus transient surges. Use Value: 50 A IFSM and 175 °C TJ rating ensure survival during repeated cold-start inrush and ambient temperatures up to 85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R01 | Same IF = 2 A, VRRM = 100 V, but trr = 35 ns (typ), VF = 0.95 V @ 2 A | Higher conduction and switching loss; less suitable for >300 kHz designs | Select PU2BA when trr ≤25 ns and Qrr ≤31 nC are required for minimal EMI and loss |
| ES2D | VRRM = 200 V, IF = 2 A, trr = 35 ns (max), VF = 0.92 V @ 2 A | Higher voltage rating trades off speed; not drop-in due to different VRRM and trr | PU2BA preferred for 100 V systems needing fastest recovery; ES2D only if 200 V blocking is mandatory |
Compared with STTH2R01 and ES2D, the PU2BA offers the lowest trr and Qrr among 2 A, 100 V ultra-fast rectifiers, making it optimal for high-frequency, low-loss DC/DC outputs and snubbers where switching speed directly impacts efficiency and thermal margin.
Availability
PU2BA is available at Aetrix Electronics and suitable for DC/DC converter output rectification, snubber network implementation, and high-frequency inverter auxiliary power supply requiring stable component supply and consistent parametric performance across production lots.
Supply support for PU2BA 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 power rectifiers, TVS devices, and MOSFETs for industrial and consumer applications.
The PU2BA belongs to TSC's PU2x series of ultra-fast rectifiers designed specifically for high-efficiency, high-frequency power conversion in compact SMT-based AC/DC and DC/DC systems.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for PU2BA?
The PU2BA has a VRRM of 100 V, meaning it can reliably block up to 100 V of reverse voltage in repetitive operation. This rating is confirmed in the Absolute Maximum Ratings table and distinguishes PU2BA from the 200 V-rated PU2DA variant. Designers must ensure circuit peak reverse voltage remains below this limit to prevent avalanche breakdown. The PU2BA datasheet specifies VR(RMS) = 70 V, aligning with standard derating practices for sinusoidal waveforms.
What is the typical reverse recovery time (trr) of PU2BA and how is it measured?
The PU2BA exhibits trr ≤25 ns under test condition IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A. An alternate condition (IF = 1.0 A, di/dt = 50 A/µs, VR = 30 V) yields trr ≤30 ns. These values are measured per JEDEC standards and reflect the device's ultra-fast soft-recovery behavior. The PU2BA's low trr directly reduces switching losses in high-frequency topologies, making it especially valuable in modern DC/DC converters where efficiency and EMI are critical.
Is PU2BA suitable for use in high-temperature environments?
Yes, the PU2BA supports junction temperatures from –55 °C to +175 °C, with thermal resistance RθJA = 78 °C/W on a standard 5 mm × 5 mm copper pad. Its high TJ(max) allows operation in enclosed industrial power supplies or automotive under-hood auxiliary circuits where ambient temperatures exceed 85 °C. Derating curves in the PU2BA datasheet confirm usable forward current down to 1.2 A at 125 °C ambient, ensuring robustness without external heatsinking.
Does PU2BA have halogen-free and RoHS-compliant construction?
Yes, the PU2BA 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 moisture sensitivity level is rated at Level 1 per J-STD-020-eliminating pre-bake steps prior to reflow. These attributes make PU2BA suitable for environmentally regulated industrial, medical, and consumer products where material compliance is mandatory.
How does the forward voltage (VF) of PU2BA vary with temperature and current?
The PU2BA shows VF = 0.87 V (max) at IF = 2 A and TJ = 25 °C, decreasing to 0.73 V (typ) at TJ = 125 °C due to negative temperature coefficient of silicon PN junctions. At 1 A, VF is 0.81 V (typ) at 25 °C and 0.66 V (typ) at 125 °C. This behavior lowers conduction loss at elevated temperatures, improving thermal stability in sustained-load applications. All VF values for PU2BA are verified under pulsed conditions (PW = 0.3 ms) to avoid self-heating artifacts.
PU2BA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 930 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 25 ns
- Current - Reverse Leakage @ Vr:
- 2 µA @ 100 V
- Capacitance @ Vr, F:
- 33pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 175°C
PU2BA FAQ
1.How can I place an order for PU2BA through Aetrix?
Please submit a Request for Quotation (RFQ) for PU2BA 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 PU2BA reliable?
The price and inventory of PU2BA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU2BA is usually 5 days.
3.What payment methods are accepted for PU2BA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU2BA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PU2BA?
PU2BA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PU2BA 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 PU2BA?
For technical support, including PU2BA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU2BA requirements.
6.How does Aetrix verify that PU2BA is sourced from the original manufacturer or authorized distributors?
All PU2BA 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 PU2BA meets industry standards.
7.What is the process for return or replacement of PU2BA?
All PU2BA units undergo pre-shipment inspection (PSI). If there is an issue with PU2BA, 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 PU2BA part is unused and in its original packaging.
Return procedure for PU2BA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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