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Taiwan Semiconductor Corporation US1BHM2G
- Part No.:
- US1BHM2G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
US1BHM2G.pdf
- Description:
- DIODE GEN PURP 100V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,312
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Product details
Overview
US1BHM2G from Taiwan Semiconductor is a 100 V, 1 A ultrafast surface-mount silicon rectifier diode in DO-214AC (SMA) package, featuring 50 ns reverse recovery time, 1.0 V max forward voltage at 1 A, and 30 A peak surge current - deployed in DC-DC converter output stages for high-efficiency power conversion.
For engineers reviewing the US1BHM2G datasheet, US1BHM2G pinout, US1BHM2G application, or US1BHM2G equivalent, key selection criteria include repetitive peak reverse voltage (100 V), ultrafast trr (≤50 ns), thermal resistance (RθJA = 75 °C/W), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance per IEC 61249-2-21.
Technical Context
This device is a single-die, unidirectional, planar passivated junction rectifier optimized for high-frequency switching applications. Its ultrafast recovery (trr ≤50 ns) minimizes switching losses in PWM-based topologies, while the glass-passivated chip junction ensures stable performance under thermal cycling and humidity stress.
The DO-214AC (SMA) package provides low thermal resistance (RθJL = 27 °C/W) and matte tin-plated leads compliant with J-STD-002 solderability. Polarity is marked by a cathode band; device weight is 0.060 g.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - maximum repetitive reverse voltage; defines safe blocking capability in flyback or buck output rectification |
| IF | 1 A continuous - average forward current rating at TA = 75 °C; sets baseline conduction capacity |
| IFSM | 30 A - non-repetitive surge current (8.3 ms half-sine); supports inrush and transient overload tolerance |
| trr | ≤50 ns - ultrafast reverse recovery time; reduces switching loss and EMI in >100 kHz converters |
| VF | ≤1.0 V @ 1 A, 25 °C - low forward drop improves efficiency and reduces heat generation at rated load |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; informs heatsinking requirements on standard FR-4 PCB |
| MSL | Level 1 (per J-STD-020) - unlimited floor life; no bake preconditioning required before reflow |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead 1) | Forward current entry | Connected to lower-potential node (e.g., switch node in buck, secondary winding in flyback) |
| Cathode (lead 2) | Forward current exit / reverse blocking terminal | Connected to output rail; polarity band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable leakage current (<5 µA @ 25 °C) and long-term reliability under humid operating conditions |
| Ultrafast recovery (trr ≤50 ns) | Reduces reverse recovery charge (Qrr) and associated switching losses in high-frequency SMPS |
| DO-214AC (SMA) package | Standardized footprint compatible with automated pick-and-place; supports 7,500 pcs/reel tape-and-reel handling |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for environmentally regulated industrial and consumer end equipment |
| MSL Level 1 | Eliminates pre-reflow baking steps and simplifies manufacturing flow for high-volume SMT assembly |
Applications
| DC-DC Converter Output Rectification | Snubber Network Clamping |
|---|---|
Use Scenario: Used as secondary-side rectifier in isolated 12 V/1 A buck-derived DC-DC module powering FPGA I/O banks. IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 1.0 V VF and 50 ns trr minimize conduction + switching loss, enabling >92% efficiency at full load. | Use Scenario: Placed across MOSFET drain-source in flyback primary to clamp voltage spikes during turn-off. IC Role / Device Role / Timing Role: Fast clamping diode absorbing inductive energy and limiting dv/dt stress on switching FET. Use Value: Ultrafast trr prevents reverse conduction delay that could cause secondary breakdown; 100 V VRRM matches typical clamp voltage design margins. |
| LED Driver Freewheeling Path | Switching Inverter Auxiliary Rectification |
Use Scenario: Provides freewheeling path for inductor current in constant-current LED driver with buck topology. IC Role / Device Role / Timing Role: Conducts stored inductor energy when main switch is off; blocks reverse current during switch-on phase. Use Value: Low VF reduces forward conduction loss in high-duty-cycle operation; MSL Level 1 ensures robustness in reflow-soldered LED modules. | Use Scenario: Rectifies auxiliary winding voltage in 3-phase inverter gate driver IC power supply. IC Role / Device Role / Timing Role: Converts AC from gate drive transformer into stable bias rail for isolated driver stages. Use Value: 30 A IFSM withstands startup surges; DO-214AC footprint allows compact layout near transformer without thermal crowding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R04 | VRRM = 400 V, trr = 35 ns, VF = 1.15 V @ 1 A - higher voltage rating but slower recovery than US1BHM2G | Preferred where higher blocking margin is needed (e.g., 24 V input systems with line transients) | Select STTH1R04 only if system requires >100 V reverse standoff; not drop-in due to different VRRM and thermal profile |
| MBR1100 | Schottky structure, VF = 0.85 V @ 1 A, VRRM = 100 V, but trr not specified - zero-recovery but higher leakage (IR = 500 µA @ 125 °C) | Better efficiency at light loads; unsuitable for high-temperature or high-voltage reverse-bias hold | Choose MBR1100 for <85 °C ambient and low-leakage-tolerant designs; avoid where reverse leakage must stay <150 µA at 125 °C |
Compared with STTH1R04 and MBR1100, US1BHM2G delivers optimal balance of 100 V blocking, 50 ns recovery, and low leakage (<5 µA @ 25 °C), making it preferred for cost-sensitive, thermally constrained 1 A DC-DC outputs where Schottky leakage or higher-VRRM devices introduce unnecessary trade-offs.
Availability
US1BHM2G is available at Aetrix Electronics and suitable for DC-DC converters, snubber networks, LED drivers, and switching inverters requiring stable component supply, consistent parametric performance, and MSL Level 1 manufacturability.
Supply support for US1BHM2G 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 diodes, MOSFETs, and bipolar transistors.
The US1x series, including US1BHM2G, was designed specifically for high-efficiency, high-frequency switching power supplies - emphasizing ultrafast recovery, low forward voltage, and robust surface-mount packaging for automated manufacturing.
FAQ
What is the maximum junction temperature rating for US1BHM2G?
The US1BHM2G has a maximum junction temperature (TJ) rating of +150 °C, with a storage temperature range of −55 °C to +150 °C. This rating enables reliable operation in industrial and automotive under-hood environments when mounted on PCBs with adequate copper pour and airflow. Thermal derating begins above 75 °C ambient, per the forward current derating curve in the US1A–US1M datasheet.
Is US1BHM2G RoHS and halogen-free compliant?
Yes, US1BHM2G is fully RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002. These qualifications make US1BHM2G suitable for consumer, industrial, and medical-grade equipment where environmental compliance is mandatory.
What does the 'HM2G' suffix in US1BHM2G indicate?
The 'HM2G' suffix in US1BHM2G denotes Taiwan Semiconductor's internal packaging and marking variant: 'H' indicates DO-214AC (SMA) package, 'M2' specifies tape-and-reel packing (7,500 pcs/reel), and 'G' signifies green (halogen-free) compound. This matches the ordering code convention defined in the US1A–US1M datasheet Version N2102.
Can US1BHM2G replace US1B in existing designs?
Yes, US1BHM2G is a direct replacement for US1B - both share identical electrical specifications (VRRM = 100 V, trr ≤50 ns, VF ≤1.0 V), DO-214AC package, and MSL Level 1. The 'HM2G' suffix reflects updated halogen-free material and tape-and-reel packaging; no layout or schematic changes are required when migrating to US1BHM2G.
What is the reverse leakage current specification for US1BHM2G at elevated temperature?
At TJ = 125 °C and rated VR, US1BHM2G exhibits a maximum reverse leakage current (IR) of 150 µA, per the electrical specifications table. At 25 °C, IR is ≤5 µA. This low, well-characterized leakage supports stable operation in high-temperature DC-DC outputs and snubbers where thermal runaway must be avoided.
US1BHM2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 100 V
- Capacitance @ Vr, F:
- 15pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1BHM2G FAQ
1.How can I place an order for US1BHM2G through Aetrix?
Please submit a Request for Quotation (RFQ) for US1BHM2G 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 US1BHM2G reliable?
The price and inventory of US1BHM2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1BHM2G is usually 5 days.
3.What payment methods are accepted for US1BHM2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1BHM2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1BHM2G?
US1BHM2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1BHM2G 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 US1BHM2G?
For technical support, including US1BHM2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1BHM2G requirements.
6.How does Aetrix verify that US1BHM2G is sourced from the original manufacturer or authorized distributors?
All US1BHM2G 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 US1BHM2G meets industry standards.
7.What is the process for return or replacement of US1BHM2G?
All US1BHM2G units undergo pre-shipment inspection (PSI). If there is an issue with US1BHM2G, 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 US1BHM2G part is unused and in its original packaging.
Return procedure for US1BHM2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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