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Taiwan Semiconductor Corporation PUAD4BH
- Part No.:
- PUAD4BH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
PUAD4BH.pdf
- Description:
- 20NS, 4A, 100V, ULTRA FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:4,498
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Product details
Overview
PUAD4BH from Taiwan Semiconductor is a 4A, 100V ultra-fast surface-mount rectifier in ThinDPAK package, featuring 25ns reverse recovery time, 0.85V forward voltage at 4A/25°C, and AEC-Q101 qualification for automotive-grade reliability. It serves as a high-efficiency freewheeling or snubber diode in DC/DC converters operating up to several hundred kHz.
For engineers reviewing the PUAD4BH datasheet, PUAD4BH pinout, PUAD4BH application, or PUAD4BH equivalent, key selection criteria include its 100V VRRM, 130A IFSM, RθJL = 3.5°C/W thermal performance, and ThinDPAK mechanical compatibility with automated SMT assembly.
Technical Context
This single-die planar silicon rectifier delivers ultra-fast switching via low Qrr (42nC) and controlled IRM (3A), enabling reduced switching losses in hard-switched topologies. Its 175°C maximum junction temperature and JESD201 Class 2 whisker resistance support under-hood automotive deployment.
The device operates with 77pF junction capacitance at 4V reverse bias and exhibits VF reduction from 0.85V @ 25°C to 0.71V @ 125°C at 4A - critical for thermal stability in high-power-density converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse voltage; defines safe blocking capability in 48V–72V bus applications |
| IF | 4 A - Continuous forward current rating; supports sustained conduction in 50W–100W power stages |
| trr | 20–25 ns - Ultra-fast reverse recovery; minimizes turn-off loss and EMI in >200kHz switching circuits |
| Qrr | 42 nC - Low reverse recovery charge; reduces diode-induced voltage spikes during MOSFET commutation |
| RθJL | 3.5 °C/W - Junction-to-lead thermal resistance; enables direct heat transfer to PCB copper without external heatsink |
| VF @ 4A/25°C | 0.85 V - Forward voltage drop; determines conduction loss of ~3.4W at full load |
| IFSM | 130 A - Non-repetitive surge current; withstands inrush and fault currents in automotive load-dump scenarios |
Pinout & Package
Package: ThinDPAK (JEDEC TO-252 variation AE), 3-terminal surface-mount package with exposed drain pad (Pin 2) for thermal and electrical connection. Cathode indicated by band on molded body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward current input | Soldered to low-side switch node or return path; carries full load current |
| 2 (Cathode / Exposed Pad) | Forward current output & thermal path | Electrically connected to cathode; must be soldered to large copper pour for thermal management |
| 3 (Source / NC) | No connection | Not internally bonded; left floating per design - no circuit function |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| Planar silicon technology | Enables precise doping control for consistent trr and low leakage across production lots |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT lines without dry-pack handling |
| Matte tin-plated leads | Ensures reliable solder wetting and long-term intermetallic stability per J-STD-002 |
| UL 94V-0 molding compound | Meets flammability safety requirements for enclosed automotive and industrial power modules |
Applications
| Automotive DC/DC Converters | Industrial Snubber Circuits |
|---|---|
Use Scenario: 12V–48V bidirectional buck-boost converter in 48V mild-hybrid vehicle systems. IC Role / Device Role / Timing Role: Freewheeling diode synchronized with SiC MOSFET switching at 300kHz. Use Value: 25ns trr and 42nC Qrr reduce switching loss by ≥18% versus standard fast recovery diodes. | Use Scenario: RCD snubber network clamping voltage spikes across IGBTs in motor drives. IC Role / Device Role / Timing Role: Fast-recovery clamp diode absorbing inductive energy during IGBT turn-off. Use Value: 130A IFSM withstands transient surges; 0.85V VF limits snubber conduction loss. |
| High-Frequency SMPS | On-Board Charger (OBC) Auxiliary Supplies |
Use Scenario: Secondary-side rectification in 500kHz LLC resonant converter for server PSUs. IC Role / Device Role / Timing Role: Output rectifier operating in discontinuous conduction mode with <100ns dead-time constraints. Use Value: 77pF CJ minimizes capacitive coupling noise; 20ns trr ensures clean zero-current switching transitions. | Use Scenario: Auxiliary 12V supply rectification in EV on-board chargers using flyback topology. IC Role / Device Role / Timing Role: Input rectifier for isolated auxiliary winding feeding control ICs and gate drivers. Use Value: AEC-Q101 qualification ensures functional safety compliance; 175°C TJMAX supports operation near main power stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4L06D | 600V VRRM, 4A IF, 35ns trr, TO-252 package | Higher voltage rating but slower recovery; suited for 400V PFC front-ends, not 100V snubbers | Select when system requires >100V blocking with moderate speed; not drop-in for PUAD4BH's 100V/25ns use case |
| MBR4100CT | Dual common-cathode Schottky, 100V, 4A per diode, 0.55V VF, TO-263 | Lower VF but higher leakage (>100µA) and no AEC-Q101 rating | Prefer where efficiency dominates over leakage or automotive qualification; requires layout change due to dual-diode configuration |
Compared with STTH4L06D and MBR4100CT, PUAD4BH uniquely balances 100V rating, 25ns recovery, AEC-Q101 compliance, and ThinDPAK footprint - making it optimal for space-constrained, high-reliability 48V automotive DC/DC stages where speed and qualification are non-negotiable.
Availability
PUAD4BH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial snubber networks, and high-frequency SMPS requiring stable component supply, AEC-Q101 assurance, and consistent ultra-fast recovery performance.
Supply support for PUAD4BH 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 devices, rectifiers, and protection components.
The PUAD4BH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive and industrial environments where thermal robustness and switching speed are critical.
FAQ
What is the maximum junction temperature rating for PUAD4BH?
The PUAD4BH has a maximum junction temperature (TJ) of +175°C, verified per absolute maximum ratings table. This allows continuous operation in under-hood automotive environments and high-temperature industrial enclosures. Derating curves confirm usable current capacity down to 0A at 175°C ambient when mounted on specified heatsink - essential for thermal design validation of the PUAD4BH.
Is PUAD4BH pin-compatible with PUAD4DH?
No, PUAD4BH and PUAD4DH are not pin-compatible replacements - they share identical ThinDPAK package and pinout, but differ in VRRM (100V vs. 200V) and associated electrical parameters. While mechanical mounting is identical, substituting PUAD4BH for PUAD4DH in a 200V design risks catastrophic failure. The PUAD4BH must only be used in circuits where peak reverse voltage remains ≤100V.
Does PUAD4BH require moisture preconditioning before reflow?
No, PUAD4BH has Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without baking or dry-pack handling. This eliminates process steps and cost in high-volume SMT lines - a confirmed feature documented in the mechanical data section of the PUAD4BH datasheet.
What is the reverse recovery charge (Qrr) of PUAD4BH and why does it matter?
The PUAD4BH specifies Qrr = 42nC at rated conditions. This parameter quantifies stored charge cleared during turn-off, directly impacting switching loss and voltage overshoot in hard-switched converters. In designs using the PUAD4BH with fast-switching MOSFETs, this low Qrr reduces EMI generation and improves efficiency versus diodes with >100nC Qrr.
Can PUAD4BH be used in place of a Schottky diode in 100V applications?
PUAD4BH is not a Schottky diode - it is a planar ultra-fast silicon rectifier with 0.85V VF and 25ns trr. While it offers lower leakage than Schottkys at high temperature, its forward voltage is higher. Use PUAD4BH where low Qrr and AEC-Q101 compliance outweigh VF penalty - e.g., in snubbers or high-TJ environments where Schottky leakage would degrade regulation.
PUAD4BH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 920 mV @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 25 ns
- Current - Reverse Leakage @ Vr:
- 2 µA @ 100 V
- Capacitance @ Vr, F:
- 77pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- ThinDPAK
- Operating Temperature - Junction:
- -55°C ~ 175°C
PUAD4BH FAQ
1.How can I place an order for PUAD4BH through Aetrix?
Please submit a Request for Quotation (RFQ) for PUAD4BH 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 PUAD4BH reliable?
The price and inventory of PUAD4BH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PUAD4BH is usually 5 days.
3.What payment methods are accepted for PUAD4BH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PUAD4BH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PUAD4BH?
PUAD4BH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PUAD4BH 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 PUAD4BH?
For technical support, including PUAD4BH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PUAD4BH requirements.
6.How does Aetrix verify that PUAD4BH is sourced from the original manufacturer or authorized distributors?
All PUAD4BH 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 PUAD4BH meets industry standards.
7.What is the process for return or replacement of PUAD4BH?
All PUAD4BH units undergo pre-shipment inspection (PSI). If there is an issue with PUAD4BH, 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 PUAD4BH part is unused and in its original packaging.
Return procedure for PUAD4BH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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