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Taiwan Semiconductor Corporation PU2BM
- Part No.:
- PU2BM
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
PU2BM.pdf
- Description:
- 25NS, 2A, 100V, ULTRA FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:11,354
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Product details
Overview
PU2BM from Taiwan Semiconductor is a 2A, 100V ultra-fast surface-mount rectifier diode in Micro SMA package, featuring 25 ns reverse recovery time, 0.99 V forward voltage at 2A/25°C, and 28 A surge current capability - used in DC-DC converter freewheeling paths.
For engineers reviewing the PU2BM datasheet, PU2BM pinout, PU2BM application, or PU2BM equivalent, key selection criteria include repetitive peak reverse voltage (100 V), thermal resistance (RθJL = 28 °C/W), junction temperature range (–55 to +175 °C), and low leakage (<1 µA at 25 °C).
Technical Context
The PU2BM employs planar silicon technology optimized for high-speed switching in power conversion circuits. Its ultra-fast recovery (trr ≤ 25 ns) and low Qrr (57 nC) minimize switching losses during turn-off in hard-switched topologies.
Designed for surface-mount assembly on PCBs with 5 mm × 5 mm copper pads, it delivers RθJA = 60 °C/W and RθJC = 34 °C/W under standard test conditions, supporting continuous 2 A operation up to 125 °C ambient with derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - maximum repetitive reverse voltage the device blocks reliably in circuit |
| IF | 2 A - continuous average forward current rating at TA = 25 °C |
| IFSM (8.3 ms) | 28 A - non-repetitive surge current handling for transient overload protection |
| trr | 25 ns - reverse recovery time enabling efficient operation above 100 kHz switching frequencies |
| VF @ 2A, 25°C | 0.99 V - forward voltage drop determining conduction loss and thermal load at rated current |
| RθJL | 28 °C/W - junction-to-lead thermal resistance critical for solder-joint reliability and thermal path design |
| IR @ 100 V, 25°C | <1 µA - low reverse leakage preserving efficiency in high-impedance bias networks |
Pinout & Package
Package: Micro SMA - surface-mount, single-diode configuration with cathode band marking; 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 side of rectification path; requires adequate copper area for heat dissipation |
| Cathode | Forward current exit / reverse voltage blocking terminal | Marked by band; ties to higher-potential node; determines polarity in bridge or freewheeling layout |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery | trr ≤ 25 ns enables high-frequency SMPS designs without excessive switching loss |
| Low forward voltage | VF = 0.99 V @ 2A/25°C reduces conduction loss and improves system efficiency |
| High surge robustness | IFSM = 28 A (8.3 ms) withstands inrush and fault currents in DC-DC stages |
| Thermal performance | RθJL = 28 °C/W supports reliable operation on standard FR-4 PCBs with minimal copper |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and J-STD-020 MSL Level 1 - no moisture bake required pre-reflow |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side synchronous or diode rectification in isolated flyback or forward converters delivering 5–24 V output. IC Role / Device Role / Timing Role: Unidirectional current steering and energy transfer during switch off-time; handles 2 A continuous output current. Use Value: Low VF and fast trr reduce power loss and EMI generation compared to standard recovery diodes. | Use Scenario: Freewheeling path across inductive loads (e.g., motor windings, solenoids) in half-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss recirculation path during high-side switch off-phase; clamps inductive kickback. Use Value: 28 ns trr and 3.8 A IRM suppress voltage overshoot and limit snubber requirements. |
| AC-DC Adapter Secondary Rectification | Industrial Power Supply Snubber Diode |
Use Scenario: Output rectification in compact wall-adapters and USB-PD auxiliary supplies operating at 65–100 kHz. IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC; operates continuously at 2 A with <1 µA leakage. Use Value: Micro SMA footprint saves board space vs. SMA; MSL Level 1 simplifies manufacturing flow. | Use Scenario: Clamp diode in RCD snubber networks across MOSFETs in industrial 3 kW PSUs. IC Role / Device Role / Timing Role: Absorbs turn-off energy spikes; must recover before next switching cycle at ≤100 kHz. Use Value: 57 nC Qrr and 18 pF CJ minimize snubber loss and capacitive loading on gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R010S | VRRM = 100 V, IF = 2 A, trr = 35 ns, VF = 1.05 V @ 2A - slower recovery and higher VF | Higher conduction and switching loss in >100 kHz designs | Acceptable where cost sensitivity outweighs efficiency targets |
| ES2D | VRRM = 200 V, IF = 2 A, trr = 35 ns, VF = 1.15 V @ 2A - higher voltage rating but slower and less efficient | Over-specified VRRM with trade-offs in speed and loss | Only suitable if 200 V blocking is mandatory and layout allows larger SMA |
Compared with STTH2R010S and ES2D, the PU2BM offers superior switching speed (25 ns vs. ≥35 ns) and lower forward voltage (0.99 V vs. ≥1.05 V), making it optimal for high-efficiency, high-frequency DC-DC and inverter freewheeling where thermal headroom is constrained.
Availability
PU2BM is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for PU2BM 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 global power and signal conditioning markets since 1979.
The PU2BM belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-frequency power conversion systems where low Qrr, tight VF tolerance, and robust surge capability are essential.
FAQ
What is the maximum repetitive peak reverse voltage rating for PU2BM?
The PU2BM has a maximum repetitive peak reverse voltage (VRRM) rating of 100 V. This value is confirmed in the Absolute Maximum Ratings table and defines the highest reverse-biased voltage the diode can block repeatedly without breakdown. Exceeding this rating risks irreversible avalanche failure. The PU2BM is part of a family where "x" in PU2xM denotes voltage grade - PU2BM = 100 V, PU2DM = 200 V.
What is the forward voltage drop of PU2BM at full rated current and room temperature?
The forward voltage (VF) of PU2BM is 0.99 V at IF = 2 A and TJ = 25 °C, per the Electrical Specifications table. This measured value reflects conduction loss under nominal operating conditions and is critical for thermal design. At elevated junction temperatures (125 °C), VF drops to 0.84 V, improving efficiency but requiring attention to thermal management.
Does PU2BM have a specified reverse recovery time, and how is it measured?
Yes, PU2BM specifies reverse recovery time (trr) as 25 ns under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. An alternate test condition yields 36 ns (IF = 1.0 A, di/dt = 50 A/µs, VR = 30 V). These values confirm its ultra-fast classification and suitability for high-frequency switching applications where rapid turn-off minimizes switching loss.
What package type does PU2BM use, and what are its key mechanical attributes?
PU2BM uses the Micro SMA package - a compact surface-mount outline with matte tin-plated leads, polarity indicated by a cathode band, and weight of approximately 0.006 g. It meets UL 94V-0 flammability, J-STD-020 MSL Level 1 (no floor life limitation), and JESD 201 Class 2 whisker resistance, enabling direct placement without baking.
Is PU2BM suitable for automotive-grade power supplies?
PU2BM is not qualified to AEC-Q101 or automotive-specific stress standards. While its junction temperature range (–55 to +175 °C) overlaps with automotive requirements, Taiwan Semiconductor explicitly states these devices are "not designed for use in medical, life-saving, or life-sustaining applications" - and automotive safety-critical systems fall under analogous constraints. For automotive use, consult TSC's AEC-Q101-certified rectifier portfolio instead of PU2BM.
PU2BM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- 2-SMD, Flat Leads
- 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:
- 1.05 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 28 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 100 V
- Capacitance @ Vr, F:
- 18pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Micro SMA
- Operating Temperature - Junction:
- -55°C ~ 175°C
PU2BM FAQ
1.How can I place an order for PU2BM through Aetrix?
Please submit a Request for Quotation (RFQ) for PU2BM 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 PU2BM reliable?
The price and inventory of PU2BM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU2BM is usually 5 days.
3.What payment methods are accepted for PU2BM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU2BM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PU2BM?
PU2BM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PU2BM 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 PU2BM?
For technical support, including PU2BM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU2BM requirements.
6.How does Aetrix verify that PU2BM is sourced from the original manufacturer or authorized distributors?
All PU2BM 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 PU2BM meets industry standards.
7.What is the process for return or replacement of PU2BM?
All PU2BM units undergo pre-shipment inspection (PSI). If there is an issue with PU2BM, 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 PU2BM part is unused and in its original packaging.
Return procedure for PU2BM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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