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Taiwan Semiconductor Corporation PU1BA
- Part No.:
- PU1BA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
PU1BA.pdf
- Description:
- 25NS, 1A, 100V, ULTRA FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
PU1BA from Taiwan Semiconductor is a 1A, 100V ultra-fast surface-mount rectifier diode in DO-214AC (SMA) package, featuring 25 ns reverse recovery time, 0.84 V forward voltage at 1.0 A/25°C, and 45 A surge current capability. It serves as a high-efficiency freewheeling or snubber diode in DC/DC converters operating up to several hundred kHz.
For engineers reviewing the PU1BA datasheet, PU1BA pinout, PU1BA application, or PU1BA equivalent, key selection criteria include its 100 V repetitive peak reverse voltage, ultra-fast trr ≤25 ns, low VF of 0.84 V at rated current, thermal resistance RθJA of 76 °C/W on standard PCB, and RoHS/halogen-free compliance for industrial power conversion designs.
Technical Context
The PU1BA employs planar junction technology to achieve fast switching with low stored charge, enabling efficient operation in high-frequency hard-switched topologies. Its single-die configuration and DO-214AC package support automated placement and reflow soldering per J-STD-002.
Thermal performance is characterized by RθJL = 20 °C/W and RθJC = 23 °C/W, validated on a 5 mm × 5 mm copper pad test board. Reverse recovery parameters-Qrr = 27 nC, IRM = 3.4 A, and trr = 19–25 ns-are measured under standardized conditions (IF = 0.5–1.0 A, di/dt = 50–200 A/µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; defines safe DC/DC output stage or snubber clamp voltage rating |
| IF | 1 A continuous - Rated average forward current; supports compact 1A-output isolated flyback or buck-derived supplies |
| trr | ≤25 ns - Ultra-fast recovery enables >500 kHz switching without excessive switching loss or ringing |
| VF @ 1A/25°C | 0.84 V max - Low conduction loss improves efficiency in low-voltage secondary-side rectification |
| IFSM | 45 A (8.3 ms) - Withstands typical inrush and transient overcurrents in power supply startup |
| TJ max | +175 °C - Enables reliable operation in thermally constrained environments such as enclosed industrial modules |
| RθJA | 76 °C/W - Thermal rise on standard 5 mm × 5 mm Cu pad allows ~1 W dissipation at +75 °C ambient |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode indicated by a band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in flyback, ground in boost freewheel) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output rail or clamp capacitor in snubber circuits |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery | trr ≤25 ns ensures minimal switching loss and EMI in 300–1000 kHz DC/DC converters |
| Low forward voltage | VF = 0.84 V max at 1 A reduces conduction loss and thermal stress in space-constrained layouts |
| High surge robustness | IFSM = 45 A (8.3 ms) accommodates repeated line transients and startup surges without degradation |
| Automated assembly ready | DO-214AC package and level-1 moisture sensitivity enable direct use in high-volume SMT lines without baking |
| Environmentally compliant | RoHS-compliant and halogen-free per IEC 61249-2-21 supports global environmental regulations |
Applications
| DC/DC Converter Secondary Rectification | Snubber Circuit Clamp Diode |
|---|---|
Use Scenario: Used in the secondary side of isolated flyback or forward converters delivering up to 1A at ≤24V output. IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during transformer reset phase; conducts unidirectionally with minimal reverse recovery tail. Use Value: 25 ns trr and 0.84 V VF reduce switching losses and improve efficiency over standard FRDs in 300–600 kHz designs. | Use Scenario: Placed across MOSFET drain-source or transformer primary to absorb turn-off energy in hard-switched SMPS. IC Role / Device Role / Timing Role: Clamp diode conducting only during brief voltage spikes; requires fast turn-on and low Qrr to minimize ringback. Use Value: Qrr = 27 nC and IRM = 3.4 A limit snubber dissipation and suppress voltage overshoot more effectively than slower alternatives. |
| High-Frequency AC-DC Adapter Output Stage | Industrial PLC Power Supply Input Rectification |
Use Scenario: Final-stage rectification in compact 12–24V, 1A wall adapters operating at ≥400 kHz. IC Role / Device Role / Timing Role: Output rectifier handling continuous 1A load with pulsed conduction duty; must sustain 175°C junction temperature. Use Value: TJ max = +175°C and RθJA = 76 °C/W allow full-rated current in sealed enclosures without forced air cooling. | Use Scenario: Input bridge leg or auxiliary supply rectifier in programmable logic controller power modules. IC Role / Device Role / Timing Role: Line-frequency or PFC-stage rectifier subjected to thermal cycling and long-term reliability requirements. Use Value: Planar construction and JESD 201 Class 2 whisker resistance ensure stable performance over 10+ years in industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06U | Same 1A/600V rating but higher VF (1.15 V), slower trr (35 ns), larger DO-214AC variant with different thermal profile | Higher voltage margin (600 V) suits wider input ranges; less suitable for low-VF, high-frequency optimization | Select when system requires >100 V VR margin or legacy layout compatibility; avoid if minimizing conduction loss is critical |
| MBR1100 | Schottky structure: VF ≈ 0.8 V, zero trr, but limited to 100 V VR and higher IR (100 µA @ 25°C) | Better efficiency at light loads; unsuitable for high-temperature or high-reliability reverse-biased hold applications | Prefer for low-noise, low-loss 12–24V outputs below 100°C ambient; not recommended where reverse leakage or TJ >125°C matters |
Compared with STTH1R06U and MBR1100, the PU1BA delivers optimal balance of low VF (0.84 V), ultra-fast trr (≤25 ns), and 100 V VR in a proven industrial-grade DO-214AC package-making it ideal for cost-sensitive, high-frequency 1A DC/DC and snubber roles where Schottky leakage or FRD sluggishness are limiting.
Availability
PU1BA is available at Aetrix Electronics and suitable for DC/DC converter secondary rectification, snubber circuit clamp diodes, and high-frequency AC-DC adapter output stages requiring stable component supply and industrial-grade reliability.
Supply support for PU1BA 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 computing applications.
The PU1BA belongs to TSC's PU1x series of ultra-fast rectifiers designed specifically for high-efficiency, high-frequency switching power supplies-emphasizing low Qrr, tight VF distribution, and robust thermal performance in standard SMD packages.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for PU1BA?
The PU1BA has a VRRM of 100 V, verified per Taiwan Semiconductor's A2210 datasheet. This rating defines the highest continuous reverse voltage the device can block without breakdown. Exceeding this value risks avalanche failure, especially under transient conditions. The PU1BA is therefore suited for 48 V nominal bus systems or 24 V output stages where reflected spikes remain within 100 V.
Does PU1BA have a specified reverse recovery time (trr), and under what test conditions?
Yes, PU1BA specifies trr ≤25 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the datasheet. An alternate condition (IF = 1.0 A, di/dt = 50 A/µs, VR = 30 V) yields trr ≤34 ns. These values confirm its classification as an ultra-fast rectifier, critical for minimizing switching loss in high-frequency DC/DC converters using the PU1BA.
Is PU1BA RoHS and halogen-free compliant?
Yes, PU1BA is RoHS compliant and halogen-free per IEC 61249-2-21, as stated in the official Taiwan Semiconductor documentation. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin-plated per J-STD-002. These qualifications make PU1BA suitable for consumer, industrial, and automotive-adjacent applications requiring strict environmental compliance.
What is the thermal resistance from junction to ambient (RθJA) for PU1BA, and how is it measured?
PU1BA has RθJA = 76 °C/W, measured on a standard JEDEC test board with a 5 mm × 5 mm copper pad. This value assumes natural convection and defines the temperature rise above ambient per watt of power dissipated. At 1 A and 0.84 V VF, the PU1BA dissipates ~0.84 W, resulting in ~64 °C rise-well within its +175 °C TJ max rating when ambient stays below +110 °C.
How is polarity marked on the PU1BA DO-214AC package?
Polarity on the PU1BA is indicated by a cathode band printed on the body of the DO-214AC (SMA) package. The banded end corresponds to the cathode terminal, while the opposite end is the anode. This marking aligns with industry-standard diode orientation and must be observed during PCB layout and assembly to ensure correct forward conduction and reverse blocking behavior in circuits using PU1BA.
PU1BA 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):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 930 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 25 ns
- Current - Reverse Leakage @ Vr:
- 2 µA @ 100 V
- Capacitance @ Vr, F:
- 19pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 175°C
PU1BA FAQ
1.How can I place an order for PU1BA through Aetrix?
Please submit a Request for Quotation (RFQ) for PU1BA 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 PU1BA reliable?
The price and inventory of PU1BA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU1BA is usually 5 days.
3.What payment methods are accepted for PU1BA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU1BA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PU1BA?
PU1BA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PU1BA 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 PU1BA?
For technical support, including PU1BA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU1BA requirements.
6.How does Aetrix verify that PU1BA is sourced from the original manufacturer or authorized distributors?
All PU1BA 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 PU1BA meets industry standards.
7.What is the process for return or replacement of PU1BA?
All PU1BA units undergo pre-shipment inspection (PSI). If there is an issue with PU1BA, 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 PU1BA part is unused and in its original packaging.
Return procedure for PU1BA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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