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Taiwan Semiconductor Corporation PU1BAH
- Part No.:
- PU1BAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
PU1BAH.pdf
- Description:
- DIODE GEN PURP 100V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,250
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Product details
Overview
PU1BAH from Taiwan Semiconductor is a 1A, 100V ultra-fast surface-mount rectifier diode in DO-214AC (SMA) package, featuring 25ns reverse recovery time, 0.84V forward voltage at 1A/25°C, and AEC-Q101 qualification for automotive-grade reliability. It serves as a primary output rectifier in high-frequency DC/DC converters.
For engineers reviewing the PU1BAH datasheet, PU1BAH pinout, PU1BAH application, or PU1BAH equivalent, key selection criteria include repetitive peak reverse voltage (100V), surge current rating (45A), junction temperature range (–55°C to +175°C), thermal resistance (RθJL = 20°C/W), and ultra-fast switching performance for snubber and SMPS designs.
Technical Context
This device employs planar silicon technology to achieve low conduction loss and fast recovery characteristics. Its single-die configuration supports unidirectional conduction with cathode-band polarity marking and operates reliably across –55°C to +175°C junction temperature range.
The PU1BAH delivers 19ns typical reverse recovery time under IF = 1.0A / di/dt = 200A/µs conditions and exhibits 19pF junction capacitance at 1MHz/4V, enabling stable operation in high-frequency switching topologies up to several hundred kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or boost output stages |
| IF | 1 A - Continuous average forward current; sets maximum steady-state power delivery capability |
| IFSM | 45 A - Non-repetitive surge current (8.3ms); determines robustness against line transients or startup inrush |
| trr | 25 ns - Maximum reverse recovery time; enables efficient operation in >200kHz switching converters |
| VF | 0.84 V @ 1A/25°C - Forward voltage drop; directly impacts conduction loss and thermal design in high-current paths |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pad heat sinking without heatsink |
| Junction Temp | –55°C to +175°C - Operating range compatible with under-hood automotive environments |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, matte tin-plated leads, polarity indicated by cathode band, weight ≈ 0.060g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., transformer secondary center-tap or switch node) |
| Cathode | Forward current exit point | Connected to output rail; marked by visible band; carries full load current to filter capacitor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power supplies |
| Ultra-fast recovery (trr ≤ 25 ns) | Minimizes switching losses and EMI generation in high-frequency DC/DC converters |
| Low VF (0.84 V @ 1A) | Reduces conduction loss by ~15% vs. standard fast rectifiers, improving efficiency at light-to-moderate loads |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; simplifies manufacturing and reduces process cost |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives for environmentally regulated end equipment |
Applications
| Automotive DC/DC Converters | High-Frequency SMPS |
|---|---|
Use Scenario: Primary-side synchronous rectification in 12V-to-5V/3.3V buck converters for infotainment systems. IC Role / Device Role / Timing Role: Output rectifier handling continuous 1A load with transient surges up to 45A. Use Value: AEC-Q101 qualification and 175°C max junction temperature ensure reliability in under-dash thermal environments. | Use Scenario: Secondary-side rectification in isolated flyback converters operating at 300kHz. IC Role / Device Role / Timing Role: Fast-recovery diode minimizing reverse recovery loss and associated ringing. Use Value: 25ns trr and 19pF CJ reduce switching noise and improve power stage efficiency above 200kHz. |
| Snubber Circuits | Industrial Power Supplies |
Use Scenario: Clamp diode in RCD snubber networks across MOSFETs in motor drive inverters. IC Role / Device Role / Timing Role: Transient energy dissipation path during switching transitions. Use Value: Low stored charge (Qrr = 27nC) limits snubber dissipation and improves clamp accuracy. | Use Scenario: Input bridge or output rectification in DIN-rail mounted 24V/48V industrial PSUs. IC Role / Device Role / Timing Role: High-reliability discrete rectifier supporting long-life field deployment. Use Value: UL 94V-0 molding compound and JESD201 Class 2 whisker resistance ensure safety and longevity in harsh factory settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | VRRM = 600V, trr = 35ns, VF = 1.15V @ 1A - higher voltage rating but slower and higher loss | Suitable for higher-voltage PFC or offline SMPS where 100V is insufficient | Select when reverse voltage margin >100V is required; avoid if efficiency or speed is critical |
| MBR1100 | VRRM = 100V, trr = 35ns, VF = 0.82V @ 1A - Schottky architecture, no reverse recovery but limited to <125°C | Better for low-temp, high-efficiency 12V systems; not rated for automotive under-hood use | Prefer for non-automotive, low-junction-temp designs; PU1BAH remains superior for TJ >125°C |
Compared with STTH1R06 and MBR1100, PU1BAH uniquely balances 100V rating, 25ns speed, 175°C operation, and AEC-Q101 compliance-making it optimal for space-constrained, thermally demanding automotive and industrial DC/DC outputs where both reliability and switching performance are essential.
Availability
PU1BAH is available at Aetrix Electronics and suitable for automotive power modules, high-frequency industrial SMPS, and snubber-critical motor drive designs requiring stable component supply and long-term manufacturability.
Supply support for PU1BAH 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 automotive-qualified components.
The PU1BAH belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-reliability switching power conversion in automotive and industrial environments where thermal robustness and fast recovery are mandatory.
FAQ
What is the maximum repetitive peak reverse voltage rating for PU1BAH?
The PU1BAH has a maximum repetitive peak reverse voltage (VRRM) of 100 V, as confirmed in the Absolute Maximum Ratings table. This rating defines the highest reverse-biased voltage the device can block continuously without breakdown. Exceeding this value risks avalanche failure, especially at elevated temperatures. Designers must maintain adequate derating-typically ≥20%-in real-world circuits with voltage spikes or ringing.
Is PU1BAH suitable for automotive applications?
Yes, PU1BAH is AEC-Q101 qualified and rated for junction temperatures from –55°C to +175°C, making it suitable for under-hood automotive power supplies, body control modules, and ADAS subsystems. Its DO-214AC package meets JESD201 Class 2 whisker resistance and moisture sensitivity level 1, supporting standard reflow assembly without pre-baking-key requirements for automotive manufacturing.
What is the forward voltage drop of PU1BAH at 1A and 25°C?
The forward voltage (VF) of PU1BAH is 0.84 V maximum at 1A and 25°C, with a typical value of 0.79 V under the same conditions. This low VF reduces conduction losses and improves system efficiency, particularly in compact DC/DC converters where thermal management is constrained. At 125°C, VF drops to 0.70 V typical due to semiconductor physics.
Does PU1BAH have a specified reverse recovery time?
Yes, PU1BAH specifies a maximum reverse recovery time (trr) of 25 ns under test conditions of IF = 0.5A, IR = 1.0A, and Irr = 0.25A. A second condition- IF = 1.0A, di/dt = 50A/µs, VR = 30V-yields 34 ns max. These values confirm its classification as an ultra-fast rectifier, critical for minimizing switching loss in high-frequency power stages.
What package type does PU1BAH use, and what are its mechanical features?
PU1BAH uses the DO-214AC (SMA) surface-mount package: molded in UL 94V-0 flammability-rated compound, with matte tin-plated leads solderable per J-STD-002, cathode polarity indicated by a visible band, and approximate weight of 0.060g. The package supports automated placement and is optimized for thermal transfer to PCB copper pads, with RθJL = 20°C/W measured on a 5mm × 5mm Cu pad test board.
PU1BAH 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 175°C
PU1BAH FAQ
1.How can I place an order for PU1BAH through Aetrix?
Please submit a Request for Quotation (RFQ) for PU1BAH 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 PU1BAH reliable?
The price and inventory of PU1BAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU1BAH is usually 5 days.
3.What payment methods are accepted for PU1BAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU1BAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PU1BAH?
PU1BAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PU1BAH 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 PU1BAH?
For technical support, including PU1BAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU1BAH requirements.
6.How does Aetrix verify that PU1BAH is sourced from the original manufacturer or authorized distributors?
All PU1BAH 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 PU1BAH meets industry standards.
7.What is the process for return or replacement of PU1BAH?
All PU1BAH units undergo pre-shipment inspection (PSI). If there is an issue with PU1BAH, 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 PU1BAH part is unused and in its original packaging.
Return procedure for PU1BAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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