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Taiwan Semiconductor Corporation PU3BAH
- Part No.:
- PU3BAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
PU3BAH.pdf
- Description:
- DIODE GEN PURP 100V 3A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:13,689
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Product details
Overview
PU3BAH from Taiwan Semiconductor is a 100V, 3A ultra-fast surface-mount rectifier in DO-214AC (SMA) package, featuring 23 ns reverse recovery time, 0.86 V forward voltage at 3A/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 PU3BAH datasheet, PU3BAH pinout, PU3BAH application, or PU3BAH equivalent, key selection criteria include repetitive peak reverse voltage (100 V), surge current capability (85 A), junction-to-lead thermal resistance (19 °C/W), and ultra-fast switching performance for snubber and SMPS designs.
Technical Context
This discrete silicon planar rectifier uses single-die construction with low-leakage, low-VF characteristics optimized for high-efficiency switching power supplies. Its 23 ns trr and 51 nC Qrr enable minimal switching loss in 100–500 kHz topologies.
The device operates across –55°C to +175°C junction temperature range and delivers stable IR ≤ 2 µA at 25°C and ≤ 10 µA at 125°C under rated reverse voltage, supporting robust thermal management on standard PCB copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or forward converter secondary side |
| IF | 3 A - Continuous forward current rating; supports 36 W output at 12 V with typical thermal derating |
| trr | 23 ns - Measured reverse recovery time at IF = 3.0 A, di/dt = 200 A/µs; enables <500 kHz operation with low EMI |
| VF @ 3A/25°C | 0.86 V - Forward voltage drop; contributes ~2.6 W conduction loss at full load |
| RθJL | 19 °C/W - Junction-to-lead thermal resistance; allows direct heat transfer to PCB copper pad without heatsink |
| Qrr | 51 nC - Reverse recovery charge; determines turn-off loss and snubber sizing in hard-switched topologies |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode-indicated 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 transformer secondary or switch node; handles full 3 A continuous and 85 A surge |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to output rail or filter capacitor; sustains 100 V reverse bias continuously |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including engine control and ADAS power modules |
| Ultra-fast trr (23 ns) | Reduces switching loss and EMI generation compared to standard fast rectifiers (>50 ns) |
| Low VF (0.86 V @ 3A) | Improves system efficiency by minimizing conduction loss in high-current DC/DC outputs |
| Moisture sensitivity level 1 | Enables direct placement without baking; supports high-volume automated SMT assembly |
| Junction temp range (–55°C to +175°C) | Permits operation in extreme environments such as industrial motor drives and automotive power converters |
Applications
| Automotive DC/DC Converter | Industrial SMPS Secondary Rectification |
|---|---|
Use Scenario: 12 V to 5 V/3.3 V isolated buck-derived converter in body control module. IC Role / Device Role / Timing Role: Primary output rectifier handling 3 A continuous load with 100 V reverse stress during MOSFET off-time. Use Value: AEC-Q101 qualification and 175°C max junction temperature ensure reliability in under-hood thermal cycling. | Use Scenario: 48 V input to 24 V output flyback supply for PLC I/O modules. IC Role / Device Role / Timing Role: High-frequency secondary-side rectifier operating at 250 kHz with minimal reverse recovery loss. Use Value: 23 ns trr and 51 nC Qrr reduce snubber dissipation and improve overall efficiency by >1.2% vs. standard fast rectifiers. |
| Snubber Network Diode | High-Frequency AC-DC Adapter |
Use Scenario: RCD snubber clamp diode in 65 kHz LLC resonant converter primary side. IC Role / Device Role / Timing Role: Fast-recovery path for leakage inductance energy; subjected to 100 V transient spikes. Use Value: Low Qrr minimizes snubber capacitor stress and enables smaller RC component values. | Use Scenario: Compact 65 W laptop adapter with dual-output flyback topology. IC Role / Device Role / Timing Role: Output rectifier for 19 V main rail; mounted on 5 mm × 5 mm Cu pad per thermal test condition. Use Value: RθJL of 19 °C/W ensures junction temperature stays <125°C at full load without forced air. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S | 600 V VRRM, 3 A IF, 35 ns trr, TO-277 package | Higher voltage rating suits PFC front-end; slower recovery increases switching loss at 250+ kHz | Select when >100 V reverse stress or higher surge immunity required; not drop-in due to different package and pinout |
| MBR3100 | 100 V VRRM, 3 A IF, Schottky structure, 0.65 V VF, no reverse recovery | No trr or Qrr; limited to ≤125°C TJ; unsuitable for 175°C ambient environments | Prefer where lowest conduction loss dominates and junction temperature remains <125°C; requires thermal redesign |
Compared with STTH3L06S and MBR3100, PU3BAH uniquely balances 100 V rating, 23 ns trr, AEC-Q101 qualification, and 175°C operation-making it optimal for space-constrained, thermally aggressive automotive and industrial DC/DC rectification where both speed and ruggedness are critical.
Availability
PU3BAH is available at Aetrix Electronics and suitable for automotive power conversion, industrial SMPS design, and high-frequency snubber circuits requiring stable component supply and long-term lifecycle support.
Supply support for PU3BAH 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 automotive, industrial, and consumer markets since 1979.
The PU3BAH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier product line, engineered specifically for high-efficiency, high-reliability switching power supplies in thermally demanding environments.
FAQ
What is the maximum junction temperature rating for PU3BAH?
The PU3BAH has a maximum junction temperature (TJ MAX) of +175°C, verified per absolute maximum ratings table in the official TSC datasheet revision B2109. This rating enables operation in under-hood automotive environments and high-ambient industrial settings. Thermal design must maintain junction temperature below this limit using appropriate PCB copper area and airflow. The PU3BAH's RθJL of 19 °C/W supports effective heat transfer to the board.
Is PU3BAH pin-compatible with other DO-214AC rectifiers like MUR320 or BYV26E?
PU3BAH shares the DO-214AC (SMA) package outline and anode/cathode terminal configuration with MUR320 and BYV26E, but it is not guaranteed pin-to-pin compatible due to differences in internal die construction, thermal pad layout, and marking orientation. While mechanical fit is identical, electrical behavior-including trr, Qrr, and VF-differs significantly. System-level validation is required before substitution. PU3BAH's 23 ns trr and AEC-Q101 qualification distinguish it from non-automotive alternatives.
What does the marking code 'PU3BA' on the PU3BAH device indicate?
The marking code 'PU3BA' laser-etched on the PU3BAH case identifies the specific voltage grade (100 V VRRM) and family within the PU3xAH series. 'PU3' denotes ultra-fast rectifier series, 'B' specifies 100 V rating (vs. 'D' for 200 V in PU3DAH), and 'A' indicates revision or process variant. This matches the ordering code PU3BAH and confirms correct binning per TSC's B2109 datasheet specification.
Does PU3BAH meet RoHS and halogen-free requirements?
Yes, PU3BAH is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the official TSC product brief and datasheet revision B2109. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002. These compliance attributes support use in environmentally regulated automotive and industrial end equipment without restriction.
How is the reverse recovery time (trr) of PU3BAH measured and what conditions apply?
PU3BAH's reverse recovery time is specified as 23 ns under conditions of IF = 3.0 A, di/dt = 200 A/µs, and VR = 100 V, per the Electrical Specifications table in TSC's B2109 datasheet. This measurement reflects real-world hard-switching behavior in high-frequency converters. An alternate trr value of 31 ns is given for IF = 1.0 A, di/dt = 50 A/µs, VR = 30 V-highlighting dependency on test conditions. Designers should reference the exact condition matching their circuit's operating point.
PU3BAH 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):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 930 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 25 ns
- Current - Reverse Leakage @ Vr:
- 2 µA @ 100 V
- Capacitance @ Vr, F:
- 47pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 175°C
PU3BAH FAQ
1.How can I place an order for PU3BAH through Aetrix?
Please submit a Request for Quotation (RFQ) for PU3BAH 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 PU3BAH reliable?
The price and inventory of PU3BAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU3BAH is usually 5 days.
3.What payment methods are accepted for PU3BAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU3BAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PU3BAH?
PU3BAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PU3BAH 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 PU3BAH?
For technical support, including PU3BAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU3BAH requirements.
6.How does Aetrix verify that PU3BAH is sourced from the original manufacturer or authorized distributors?
All PU3BAH 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 PU3BAH meets industry standards.
7.What is the process for return or replacement of PU3BAH?
All PU3BAH units undergo pre-shipment inspection (PSI). If there is an issue with PU3BAH, 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 PU3BAH part is unused and in its original packaging.
Return procedure for PU3BAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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