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Taiwan Semiconductor Corporation S2MAF-T
- Part No.:
- S2MAF-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
S2MAF-T.pdf
- Description:
- 2A, 1000V, STANDARD RECOVERY REC
- Quantity:
- Payment:
- Shipping:
Inventory:6,481
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Product details
Overview
S2MAF-T from Taiwan Semiconductor is a 1000 V, 2 A standard surface-mount silicon rectifier diode in SMAF package, featuring glass-passivated junction, low reverse leakage (≤5 µA at 25°C), and 150°C max junction temperature - used in DC-DC converters and switching-mode inverters.
For engineers reviewing the S2MAF-T datasheet, S2MAF-T pinout, S2MAF-T application, or S2MAF-T equivalent, key selection criteria include repetitive peak reverse voltage (1000 V), forward current rating (2 A), thermal resistance (RθJL = 15 °C/W), and RoHS/halogen-free compliance for industrial power conversion designs.
Technical Context
This single-die standard rectifier operates with a maximum junction temperature of 150°C and exhibits low forward voltage drop (0.95 V typ. at 2 A, 25°C; 0.85 V typ. at 2 A, 125°C). Its glass-passivated chip junction ensures stable reverse characteristics under thermal stress.
The device supports surge currents up to 50 A (8.3 ms half-sine) and 130 A (1.0 ms), with junction-to-lead thermal resistance of 15 °C/W on a 5 mm × 5 mm copper pad - enabling reliable operation in compact, high-density PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports input stages in 800 V-class AC/DC front-ends and high-voltage DC-DC isolation barriers |
| IF | 2 A continuous - suitable for medium-power SMPS outputs and auxiliary rail rectification |
| IFSM (8.3 ms) | 50 A - withstands inrush and transient surges in offline switchers without derating |
| VF @ 2 A, 25°C | 0.95 V (typ), 1.10 V (max) - minimizes conduction loss and thermal rise in 12–48 V output stages |
| RθJL | 15 °C/W - enables direct thermal coupling to PCB copper, reducing need for heatsinks in space-constrained designs |
| IR @ VR, 25°C | ≤5 µA - ensures low standby power loss in battery-backed or energy-sensitive systems |
| Junction Temp Range | −55°C to +150°C - qualified for extended-temperature industrial and automotive under-hood environments |
Pinout & Package
Package: SMAF - surface-mount, single-anode/single-cathode configuration with matte tin-plated leads, polarity indicated by cathode band, UL 94V-0 molding compound, and JESD201 Class 1 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode (K) | Forward current exit / reverse-blocking terminal | Connected to output rail; cathode band marks this terminal for automated optical inspection and placement |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability and moisture resistance without hermetic sealing - critical for humid-environment deployments |
| Moisture sensitivity level 1 | Eliminates bake requirements before reflow, supporting standard SMT assembly lines without process modification |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS Directive - required for CE-marked industrial and consumer power supplies |
| Low RθJL (15 °C/W) | Enables >1.5 W power dissipation on standard FR-4 with 5 mm × 5 mm Cu pad - avoids thermal vias or external heatsinks |
| 130 A surge rating (1.0 ms) | Provides robustness against short-duration line transients and capacitor-charging spikes in unregulated inputs |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Input Stage |
|---|---|
Use Scenario: Secondary-side synchronous or diode rectification in isolated 24–48 V output DC-DC converters operating at 100–500 kHz. IC Role / Device Role / Timing Role: Unidirectional current path with low forward loss and minimal reverse recovery charge. Use Value: 0.95 V VF at 2 A reduces conduction loss by ~15% vs. legacy 1.1 V diodes, improving efficiency in 50–100 W modules. | Use Scenario: Input bridge rectification in 3-phase or single-phase motor drive inverters handling 400–800 V DC bus. IC Role / Device Role / Timing Role: High-voltage AC-to-DC conversion with surge immunity during grid transients. Use Value: 1000 V VRRM and 130 A IFSM (1 ms) allow direct use in 690 VAC industrial mains interfaces without series stacking. |
| General-Purpose Power Supply Front-End | Industrial Auxiliary Power Rail |
Use Scenario: Bulk rectification in off-line SMPS for PLCs, HMIs, and programmable logic controllers with universal AC input. IC Role / Device Role / Timing Role: Main AC input rectifier delivering 2 A average current into bulk capacitor. Use Value: 150°C TJMAX and −55°C to +150°C storage range support operation in unventilated enclosures across global ambient conditions. | Use Scenario: Isolated auxiliary supply (e.g., 12 V/2 A) powering gate drivers, sensors, and communication ICs in motor control boards. IC Role / Device Role / Timing Role: Compact, low-leakage rectifier feeding linear or buck regulator input. Use Value: ≤5 µA reverse leakage at 25°C limits no-load power draw, extending standby time in always-on industrial nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R06S | 600 V VRRM, same IF (2 A), higher VF (1.15 V max @ 2 A), TO-277 package | Limited to ≤600 V AC input systems; requires larger footprint and manual soldering | Select when 600 V rating suffices and through-hole assembly is preferred |
| MBR2100F | 1000 V VRRM, but Schottky construction → zero reverse recovery, higher IR (100 µA @ 25°C), 1.7 V VF | Better for high-frequency switching but unsuitable where low leakage or low VF is critical | Choose only if ultra-fast recovery is mandatory and leakage tolerance allows ≥100 µA |
Compared with STTH2R06S and MBR2100F, the S2MAF-T uniquely balances 1000 V capability, low 0.95 V forward drop, and ultra-low 5 µA leakage - making it optimal for high-efficiency, high-reliability industrial SMPS where thermal margin and standby loss are constrained.
Availability
S2MAF-T is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and general-purpose power supplies requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.
Supply support for S2MAF-T 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 devices, and MOSFETs for industrial and computing markets.
The S2MAF-T belongs to TSC's S2xAx-T family of standard rectifiers designed specifically for cost-sensitive, high-volume industrial power conversion - emphasizing thermal robustness, assembly compatibility, and long-term parametric stability.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for the S2MAF-T?
The S2MAF-T has a maximum repetitive peak reverse voltage (VRRM) of 1000 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version B2103). This rating applies under standard test conditions (TA = 25°C) and defines the highest reverse voltage the device can block continuously without breakdown. The S2MAF-T is the highest-voltage variant in the S2DAF-T to S2MAF-T series.
Does the S2MAF-T have a glass-passivated junction, and why does it matter?
Yes, the S2MAF-T features a glass-passivated chip junction, explicitly listed under FEATURES in the Taiwan Semiconductor documentation. This passivation layer improves long-term reliability by protecting the silicon surface from moisture, contaminants, and mechanical stress - directly contributing to its J-STD-020 moisture sensitivity level 1 rating and stable reverse leakage performance over time and temperature.
What is the forward voltage (VF) of the S2MAF-T at 2 A and 125°C?
The forward voltage (VF) of the S2MAF-T is 0.85 V (typical) and 0.96 V (maximum) at 2 A and 125°C, per the Electrical Specifications table. This reduced VF at elevated temperature reflects the inherent negative temperature coefficient of silicon PN junctions and confirms stable conduction performance in thermally stressed environments such as enclosed power supplies or motor drives.
Is the S2MAF-T RoHS and halogen-free compliant?
Yes, the S2MAF-T is RoHS compliant and halogen-free according to IEC 61249-2-21, as stated in the FEATURES section of the Taiwan Semiconductor datasheet. This compliance is verified through material declarations and testing, ensuring suitability for export-controlled and environmentally regulated applications including CE-marked industrial equipment and consumer power adapters.
What is the thermal resistance from junction to lead (RθJL) for the S2MAF-T, and how is it measured?
The junction-to-lead thermal resistance (RθJL) of the S2MAF-T is 15 °C/W, measured with the device mounted on a standard 5 mm × 5 mm copper pad PCB per JEDEC test conditions. This value quantifies heat transfer efficiency from the die to the PCB copper via the leads, enabling accurate thermal design without additional heatsinking in many medium-power applications using the S2MAF-T.
S2MAF-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 2 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 11pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAF
- Operating Temperature - Junction:
- -55°C ~ 150°C
S2MAF-T FAQ
1.How can I place an order for S2MAF-T through Aetrix?
Please submit a Request for Quotation (RFQ) for S2MAF-T 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 S2MAF-T reliable?
The price and inventory of S2MAF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2MAF-T is usually 5 days.
3.What payment methods are accepted for S2MAF-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2MAF-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2MAF-T?
S2MAF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2MAF-T 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 S2MAF-T?
For technical support, including S2MAF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2MAF-T requirements.
6.How does Aetrix verify that S2MAF-T is sourced from the original manufacturer or authorized distributors?
All S2MAF-T 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 S2MAF-T meets industry standards.
7.What is the process for return or replacement of S2MAF-T?
All S2MAF-T units undergo pre-shipment inspection (PSI). If there is an issue with S2MAF-T, 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 S2MAF-T part is unused and in its original packaging.
Return procedure for S2MAF-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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