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Taiwan Semiconductor Corporation US1B M2G
- Part No.:
- US1B M2G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
US1B M2G.pdf
- Description:
- DIODE GEN PURP 100V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,003
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Product details
Overview
US1B M2G from Taiwan Semiconductor is a 100 V, 1 A ultrafast surface-mount 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 converters and snubber circuits for high-efficiency power conversion.
For engineers reviewing the US1B M2G datasheet, US1B M2G pinout, US1B M2G application, or US1B M2G equivalent, key selection criteria include repetitive peak reverse voltage (100 V), thermal resistance (RθJA = 75 °C/W), junction temperature range (–55 to +150 °C), moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance per IEC 61249-2-21.
Technical Context
The US1B M2G implements a single-die, glass-passivated PN junction optimized for ultrafast switching in high-frequency power supplies. Its 50 ns reverse recovery time and low 1.0 V forward voltage drop at 1 A enable reduced conduction and switching losses in flyback and forward converter topologies.
Thermally, it features a junction-to-ambient thermal resistance of 75 °C/W and junction-to-lead resistance of 27 °C/W, supporting continuous operation up to 150 °C junction temperature with appropriate PCB copper area. Polarity is marked by a cathode band on the DO-214AC (SMA) body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - maximum repetitive reverse voltage the device blocks without breakdown; defines usable input voltage headroom in rectification stage |
| IF | 1 A - average forward current rating at 75 °C ambient; sets continuous output capability in low-power SMPS |
| trr | 50 ns - ultrafast reverse recovery time; minimizes switching loss and EMI in >100 kHz converters |
| VF @ 1 A | ≤1.0 V - low forward voltage drop; reduces conduction loss and thermal stress under full load |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; requires ≥25 mm² 1-oz copper pad for safe 1 A operation at 75 °C ambient |
| IFSM | 30 A - non-repetitive peak surge current (8.3 ms half-sine); withstands inrush and transient overloads |
| MSL Level | Level 1 - no floor life limitation or bake requirement before reflow; compatible with standard SMT assembly |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded epoxy case meeting UL 94V-0; matte tin-plated leads; cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output rail or snubber network; carries full output voltage during off-state |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability and humidity resistance; eliminates need for conformal coating in industrial environments |
| Ultrafast trr = 50 ns | Enables efficient operation in 200–500 kHz switching converters without excessive ringing or loss penalties |
| Low VF ≤ 1.0 V @ 1 A | Reduces power dissipation to ≤1.0 W at full rated current, easing thermal design in space-constrained layouts |
| DO-214AC (SMA) package | Standardized footprint compatible with automated pick-and-place; supports 7,500 pcs/reel tape-and-reel delivery |
| RoHS & halogen-free | Complies with IEC 61249-2-21; meets global environmental regulations for consumer and industrial end equipment |
Applications
| DC-DC Converter Rectification | Snubber Network Diode |
|---|---|
Use Scenario: Secondary-side rectification in isolated 5–24 V, 1–5 W flyback converters powering IoT sensors and LED drivers. IC Role / Device Role / Timing Role: Unidirectional current steering and AC-to-DC conversion; operates synchronously with primary-side MOSFET switching at 65–200 kHz. Use Value: 50 ns trr prevents reverse recovery-induced voltage spikes that could overstress output capacitors or cause cross-conduction in synchronous designs. | Use Scenario: RCD snubber across MOSFET drain-source in offline SMPS to clamp voltage spikes during turn-off. IC Role / Device Role / Timing Role: Fast clamping diode that conducts only during transient voltage overshoot; must recover before next switching cycle. Use Value: 100 V VRRM and 50 ns trr ensure reliable clamping without oscillation or delayed turn-off in 65–132 kHz applications. |
| Freewheeling Diode | Lighting Driver Output Stage |
Use Scenario: Freewheeling path for inductive loads in 12–24 V automotive body electronics (e.g., solenoid drivers, relay coils). IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when inductive load is de-energized; handles brief 30 A surge pulses. Use Value: 30 A IFSM and –55 to +150 °C TJ rating support robust operation in under-hood temperature cycling. | Use Scenario: Output rectification in constant-current LED drivers for commercial downlights and street lighting modules. IC Role / Device Role / Timing Role: Converts high-frequency AC from transformer secondary into stable DC for LED string biasing. Use Value: 1.0 V VF maximizes efficiency in thermally constrained aluminum-core PCBs, directly improving lumen-per-watt performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R04 (STMicroelectronics) | VRRM = 400 V, trr = 35 ns, VF = 1.15 V @ 1 A, DO-214AC | Higher voltage rating and faster recovery, but higher forward drop increases conduction loss at 100 V systems | Select when system requires >200 V reverse margin or <40 ns trr; verify thermal derating due to higher VF |
| ES1B (ON Semiconductor) | VRRM = 100 V, trr = 35 ns, VF = 0.92 V @ 1 A, DO-214AC | Nearly identical voltage/current ratings, faster recovery and lower VF, but MSL level not specified in public datasheet | Preferred where lowest conduction loss and fastest switching are critical; confirm MSL handling if used in high-volume SMT lines |
Compared with STTH1R04 and ES1B, US1B M2G offers optimal balance of 100 V rating, 50 ns recovery, 1.0 V forward drop, and guaranteed MSL 1 handling - making it especially suitable for cost-sensitive, high-volume 100 V-class SMPS where thermal and assembly reliability are prioritized over marginal speed gains.
Availability
US1B M2G is available at Aetrix Electronics and suitable for DC-DC converters, snubber networks, freewheeling circuits, and LED lighting drivers requiring stable component supply, consistent parametric performance, and full traceability.
Supply support for US1B M2G 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 industrial, computing, and consumer markets since 1979.
The US1x series was designed specifically for high-efficiency, high-frequency rectification in compact power supplies - emphasizing ultrafast recovery, low forward voltage, and robust SMT manufacturability in the DO-214AC package.
FAQ
What is the maximum junction temperature rating for US1B M2G?
The US1B M2G has a maximum junction temperature (TJ) of +150 °C and a minimum of –55 °C. This wide operating range allows deployment in automotive under-hood modules and industrial control units exposed to thermal cycling. Derating curves in the official datasheet specify allowable average forward current versus ambient temperature, and US1B M2G maintains full 1 A rating up to 75 °C ambient with adequate PCB copper area.
Is US1B M2G RoHS and halogen-free compliant?
Yes, US1B M2G is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. This compliance enables use in consumer electronics sold in EU, Japan, and China markets without additional substance declarations or exemptions.
What does the 'M2G' suffix indicate in US1B M2G?
The 'M2G' suffix in US1B M2G denotes Taiwan Semiconductor's internal packaging and environmental code: 'M' indicates DO-214AC (SMA) package, '2' specifies tape-and-reel packing (7,500 pcs/reel), and 'G' confirms green (halogen-free) compound. It is not a functional variant - all electrical parameters match the base US1B specification defined in datasheet version N2102.
Can US1B M2G replace US1A or US1D in existing designs?
US1B M2G is not a direct replacement for US1A (50 V) or US1D (200 V) due to differing VRRM ratings. Substituting US1B M2G for US1A risks overvoltage failure in 50 V systems; using it in place of US1D may compromise safety margin in 200 V applications. Always verify reverse voltage stress margins and thermal performance before interchanging US1x variants.
What is the reverse recovery time (trr) test condition for US1B M2G?
The reverse recovery time of 50 ns for US1B M2G is measured under the condition: IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A, at TA = 25 °C. This standardized test reflects real-world switching behavior in hard-commutated converters. The value is a maximum limit - typical units measure ~35–45 ns - and remains stable across the –55 to +125 °C junction temperature range.
US1B M2G 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1B M2G FAQ
1.How can I place an order for US1B M2G through Aetrix?
Please submit a Request for Quotation (RFQ) for US1B M2G 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 US1B M2G reliable?
The price and inventory of US1B M2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1B M2G is usually 5 days.
3.What payment methods are accepted for US1B M2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1B M2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1B M2G?
US1B M2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1B M2G 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 US1B M2G?
For technical support, including US1B M2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1B M2G requirements.
6.How does Aetrix verify that US1B M2G is sourced from the original manufacturer or authorized distributors?
All US1B M2G 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 US1B M2G meets industry standards.
7.What is the process for return or replacement of US1B M2G?
All US1B M2G units undergo pre-shipment inspection (PSI). If there is an issue with US1B M2G, 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 US1B M2G part is unused and in its original packaging.
Return procedure for US1B M2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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