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Taiwan Semiconductor Corporation S4A R7G
- Part No.:
- S4A R7G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
S4A R7G.pdf
- Description:
- DIODE GEN PURP 50V 4A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,990
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Product details
Overview
S4A R7G from Taiwan Semiconductor is a 4A, 50V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring 1.15V max forward voltage at 4A/25°C, 100A peak surge current, and 150°C maximum junction temperature. It serves as a primary AC-to-DC conversion element in compact off-line power supplies.
For engineers reviewing the S4A R7G datasheet, S4A R7G pinout, S4A R7G application, or S4A R7G equivalent, key selection criteria include repetitive peak reverse voltage (50V), thermal resistance (13°C/W junction-to-lead), moisture sensitivity level (J-STD-020 Level 1), RoHS/halogen-free compliance, and tape-and-reel packaging for automated placement.
Technical Context
This single-die standard recovery rectifier operates with a 1500ns reverse recovery time under IF = 0.5A, IR = 1.0A, Irr = 0.25A conditions and exhibits 60pF junction capacitance at 1MHz/4V reverse bias. Its glass-passivated junction ensures stable performance across -55°C to +150°C operating range.
The device uses matte tin-plated leads compliant with J-STD-002 solderability and meets JESD 201 Class 2 whisker resistance. Polarity is marked by a cathode band, and the UL 94V-0 molding compound supports high-reliability industrial assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Avg) | 4 A - Continuous forward current rating defines maximum DC output capability in bridge or single-phase rectifier stages |
| VRRM | 50 V - Peak repetitive reverse voltage sets safe AC input voltage limit before breakdown in unidirectional conduction |
| IFSM | 100 A - 8.3ms half-sine surge rating determines robustness against line transients and inrush currents |
| VF (max) | 1.15 V @ 4A/25°C - Forward voltage drop directly impacts conduction loss and thermal design in high-current paths |
| RθJL | 13 °C/W - Junction-to-lead thermal resistance governs heat transfer efficiency to PCB copper and heatsinking structures |
| trr | 1500 ns - Reverse recovery time affects switching losses and EMI generation in higher-frequency SMPS topologies |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode-indicated polarity band; 0.210g mass; UL 94V-0 molded body; matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive input terminal during forward conduction | Connected to AC source or transformer secondary; must handle full load current and surge stress |
| Cathode | Output terminal during forward conduction; negative reference | Marked by band; ties to output capacitor or DC bus; defines voltage reference point for downstream circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable leakage current (<10 µA @ 25°C) and long-term reliability under humid or thermally cycled environments |
| J-STD-020 Level 1 moisture sensitivity | Eliminates bake requirements prior to reflow, supporting direct placement into high-volume SMT lines without handling delays |
| UL 94V-0 molding compound | Meets flame-retardant safety standards required for end equipment certifications including IEC/EN 62368-1 |
| RoHS & halogen-free compliance | Fulfills environmental regulations (IEC 61249-2-21) for global market access and sustainable manufacturing programs |
Applications
| AC-DC Adapter Power Stage | LED Driver Input Rectification |
|---|---|
Use Scenario: Converts 90–264V AC mains to unregulated DC in compact wall adapters for consumer electronics. IC Role / Device Role / Timing Role: Primary rectifier in single-phase full-wave or voltage-doubler configuration. Use Value: Low VF (1.15V max) reduces conduction loss at 4A, enabling smaller heatsinks and higher power density. | Use Scenario: Rectifies AC input in non-isolated LED drivers for commercial lighting fixtures. IC Role / Device Role / Timing Role: Front-end unidirectional current path before bulk capacitor and constant-current regulation stage. Use Value: 100A IFSM withstands lamp cold-start surges; DO-214AB footprint fits tight board space constraints. |
| Industrial SMPS Input Stage | DC-DC Converter Pre-Regulator |
Use Scenario: Used in 24V/48V industrial power supplies where ambient temperatures exceed 70°C. IC Role / Device Role / Timing Role: High-reliability rectifier in offline flyback or forward converter primary side. Use Value: 150°C TJ(max) and 13°C/W RθJL support operation without forced air cooling in sealed enclosures. | Use Scenario: Rectifies auxiliary AC winding output feeding isolated gate driver or control supply rails. IC Role / Device Role / Timing Role: Secondary-side rectifier delivering low-noise bias voltage to PWM controllers or MOSFET drivers. Use Value: 60pF CJ minimizes capacitive coupling noise into sensitive analog control circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MUR450 | Ultrafast recovery (75ns trr vs. 1500ns); VF = 1.25V @ 4A; same DO-214AB package | Better suited for high-frequency (>100kHz) converters where switching loss dominates | Select MUR450 only when trr-driven EMI or efficiency gain justifies higher VF and cost |
| Vishay VS-4EWH05 | Standard recovery (1500ns trr); VF = 1.1V @ 4A; same DO-214AB; AEC-Q101 qualified | Validated for automotive under-hood environments per AEC-Q101 stress testing | Choose VS-4EWH05 for automotive-grade designs requiring qualification evidence beyond industrial specs |
Compared with MUR450 and VS-4EWH05, the S4A R7G offers optimal balance of low VF, industrial-grade reliability, and cost-effective sourcing-ideal for general-purpose SMPS where standard recovery speed suffices and automotive qualification is not required.
Availability
S4A R7G is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and AC-DC adapters requiring stable component supply, J-STD-020 Level 1 handling, and RoHS-compliant manufacturing.
Supply support for S4A R7G 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and ISO/TS 16949-certified production.
The S4A R7G belongs to TSC's S4x series of surface-mount standard recovery rectifiers, engineered for cost-sensitive, high-volume AC-DC conversion in industrial and consumer power systems.
FAQ
What is the maximum junction temperature rating for the S4A R7G?
The S4A R7G has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table. This allows reliable operation in enclosed power supplies with limited airflow. Thermal design must ensure junction temperature remains below this limit under worst-case load and ambient conditions. The S4A R7G's 13°C/W junction-to-lead thermal resistance supports effective heat transfer to PCB copper when mounted per recommended pad layout.
Does the S4A R7G meet RoHS and halogen-free requirements?
Yes, the S4A R7G is RoHS compliant and halogen-free per IEC 61249-2-21. These environmental qualifications are confirmed in the official Taiwan Semiconductor datasheet revision K2102. The S4A R7G uses lead-free matte tin plating on terminals and halogen-free molding compound, enabling compliance with EU WEEE, China RoHS, and JEITA EG0202 standards for global market deployment.
What is the reverse recovery time (trr) specification for the S4A R7G?
The S4A R7G has a reverse recovery time (trr) of 1500 ns, measured under IF = 0.5A, IR = 1.0A, and Irr = 0.25A conditions. This value is specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. As a standard recovery rectifier, the S4A R7G is intended for line-frequency and low-to-moderate switching frequency applications-not ultrafast topologies. Designers should verify EMI and loss implications of this trr in their specific S4A R7G implementation.
Is the S4A R7G suitable for automated SMT assembly?
Yes, the S4A R7G is optimized for automated placement: it carries J-STD-020 Moisture Sensitivity Level 1 (no baking required), features matte tin-plated leads compliant with J-STD-002 solderability, and uses a DO-214AB (SMC) package with standardized tape-and-reel packaging (3,000 units per reel). The S4A R7G's consistent marking and polarity band further support vision-based pick-and-place accuracy in high-throughput SMT lines.
What does the "R7G" suffix indicate in S4A R7G?
The "R7G" suffix in S4A R7G denotes Taiwan Semiconductor's internal date code and factory marking: "R7" corresponds to week 7 of year 2023, and "G" identifies the fabrication facility. This is distinct from the electrical rating-the core device is the S4A (50V VRRM). The S4A R7G shares identical electrical, thermal, and mechanical specifications with all S4A-marked units; the suffix reflects traceability, not functional differentiation.
S4A R7G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.15 V @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 50 V
- Capacitance @ Vr, F:
- 60pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S4A R7G FAQ
1.How can I place an order for S4A R7G through Aetrix?
Please submit a Request for Quotation (RFQ) for S4A R7G 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 S4A R7G reliable?
The price and inventory of S4A R7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S4A R7G is usually 5 days.
3.What payment methods are accepted for S4A R7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S4A R7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S4A R7G?
S4A R7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S4A R7G 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 S4A R7G?
For technical support, including S4A R7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S4A R7G requirements.
6.How does Aetrix verify that S4A R7G is sourced from the original manufacturer or authorized distributors?
All S4A R7G 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 S4A R7G meets industry standards.
7.What is the process for return or replacement of S4A R7G?
All S4A R7G units undergo pre-shipment inspection (PSI). If there is an issue with S4A R7G, 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 S4A R7G part is unused and in its original packaging.
Return procedure for S4A R7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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