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Taiwan Semiconductor Corporation S1A R3G
- Part No.:
- S1A R3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
S1A R3G.pdf
- Description:
- DIODE GEN PURP 50V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4
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Product details
Overview
S1A R3G from Taiwan Semiconductor is a 1 A, 50 V surface-mount silicon rectifier diode in DO-214AC (SMA) package, featuring glass-passivated junction, 1.1 V max forward voltage at 1 A, 1 µA max reverse leakage at 25°C, and 175°C max junction temperature - used in DC-DC converters and snubber circuits.
For engineers reviewing the S1A R3G datasheet, S1A R3G pinout, S1A R3G application, or S1A R3G equivalent, key selection factors include repetitive peak reverse voltage (50 V), surge current rating (40 A), thermal resistance (27 °C/W junction-to-lead), and RoHS/halogen-free compliance for industrial power conversion designs.
Technical Context
This device is a single-die, standard recovery rectifier with unidirectional conduction and cathode-band polarity marking. Its 1500 ns reverse recovery time and 12 pF junction capacitance reflect trade-offs between switching speed and low forward loss.
Designed for surface-mount assembly per J-STD-020 Level 1 moisture sensitivity, it supports automated placement and reflow soldering. Matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Avg) | 1 A - continuous forward current rating at TA = 75°C with adequate PCB copper area |
| VRRM | 50 V - maximum repetitive reverse voltage before breakdown; defines minimum system isolation margin |
| VF (max) | 1.1 V @ 1 A, 25°C - determines conduction loss and thermal load in high-duty-cycle operation |
| IFSM | 40 A - peak non-repetitive surge current capability for transient overload protection |
| TJ max | +175°C - enables operation in thermally constrained environments such as enclosed power supplies |
| trr | 1500 ns - limits usable switching frequency in hard-switched topologies; not suitable for >100 kHz SMPS |
| CJ | 12 pF @ 1 MHz, 4 V - contributes to EMI generation and affects snubber design in flyback converters |
Pinout & Package
Package: DO-214AC (SMA), molded epoxy case meeting UL 94V-0, cathode indicated by band, matte tin-plated leads, weight ≈ 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of AC source or switch node in rectification path |
| Cathode | Forward current exit point | Marked by band; ties to output rail or energy storage capacitor positive terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability under humidity and thermal cycling vs. epoxy-passivated alternatives |
| J-STD-020 Level 1 moisture sensitivity | Enables direct use without baking prior to reflow, reducing manufacturing overhead |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 and EU directives for environmentally restricted electronics |
| UL 94V-0 molding compound | Provides flame-retardant housing required for safety-certified power supplies |
Applications
| DC-DC Converter | Snubber Circuit |
|---|---|
Use Scenario: Secondary-side rectification in isolated buck-derived topologies with 12–24 V input and ≤5 A output. IC Role / Device Role / Timing Role: Unidirectional current steering element converting transformer AC output to regulated DC. Use Value: 1.1 V VF minimizes conduction loss at 1 A load; 40 A IFSM handles startup surges without failure. | Use Scenario: Voltage clamping across MOSFET drain-source during turn-off in flyback or forward converters. IC Role / Device Role / Timing Role: Transient energy dissipation path via reverse-biased conduction into RC network. Use Value: 50 V VRRM matches typical clamp voltage thresholds; 12 pF CJ stabilizes ringing without excessive capacitive loading. |
| Lighting Application | Switching Mode Inverter |
Use Scenario: Input bridge rectification in LED driver modules with universal AC input (85–265 VAC). IC Role / Device Role / Timing Role: Half-wave or full-wave rectifier feeding bulk capacitor in offline AC-DC stage. Use Value: 175°C TJ max allows sustained operation near heatsinked LED drivers; Level 1 MSL simplifies SMT line integration. | Use Scenario: Freewheeling path in H-bridge motor inverters for small appliances operating below 10 kHz. IC Role / Device Role / Timing Role: Inductive kickback recirculation diode during PWM dead-time intervals. Use Value: 27 °C/W RθJL enables efficient heat transfer to PCB copper; 1500 ns trr avoids commutation failure at 5–10 kHz switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor M1A | Same DO-214AC package, identical 1 A/50 V ratings, but VF = 1.05 V (typ) and trr = 1200 ns | Slightly faster recovery and lower conduction loss; preferred where efficiency >0.3% matters at 1 A | Select M1A when optimizing for minimal conduction + switching loss in compact 10–50 kHz converters |
| Vishay VS-1A50 | DO-214AC, 1 A/50 V, VF = 1.15 V (max), trr = 1800 ns, higher IR (5 µA @ 125°C) | Higher leakage and slower recovery limit use in high-temp or high-frequency snubbers | Choose VS-1A50 only if legacy qualification or dual-sourcing mandates Vishay footprint compatibility |
Compared with M1A and VS-1A50, the S1A R3G offers balanced performance: lower VF than VS-1A50 and better thermal resistance than M1A (27 vs. 30 °C/W), making it optimal for cost-sensitive, thermally constrained 1 A rectification where 1500 ns trr is acceptable.
Availability
S1A R3G is available at Aetrix Electronics and suitable for DC-DC converters, lighting drivers, and snubber circuits requiring stable component supply, consistent DO-214AC packaging, and RoHS-compliant manufacturing.
Supply support for S1A R3G 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 S1A R3G belongs to TSC's S1x series of general-purpose surface-mount rectifiers, engineered for cost-effective, reliable AC/DC front-end and secondary-side rectification in consumer, industrial, and lighting power supplies.
FAQ
What is the maximum junction temperature rating for the S1A R3G?
The S1A R3G has a maximum junction temperature (TJ max) of +175°C, allowing operation in thermally demanding environments such as enclosed LED drivers or high-density DC-DC modules. This rating is validated under specified thermal conditions and must be maintained using appropriate PCB copper area and airflow. The S1A R3G's 27 °C/W junction-to-lead thermal resistance supports effective heat transfer to the board.
Does the S1A R3G have a defined pinout or terminal configuration?
Yes, the S1A R3G uses a two-terminal DO-214AC (SMA) package with anode and cathode terminals. The cathode is marked by a visible band on the body; the anode is the unmarked end. No internal circuitry or additional pins exist - the S1A R3G is a passive two-terminal rectifier diode. Its terminal roles are fixed and non-configurable.
Is the S1A R3G suitable for high-frequency switching applications?
No, the S1A R3G is not recommended for high-frequency switching above 50 kHz due to its 1500 ns reverse recovery time (trr), which causes increased switching losses and potential voltage overshoot. It is optimized for line-frequency rectification and low-to-moderate frequency (<20 kHz) snubber or freewheeling use. For high-frequency designs, consider fast recovery or Schottky alternatives instead of the S1A R3G.
What packaging and moisture sensitivity level does the S1A R3G have?
The S1A R3G is supplied in DO-214AC (SMA) package on 7,500-piece tape-and-reel format and complies with J-STD-020 Moisture Sensitivity Level 1 - meaning it can be stored indefinitely at ambient conditions and placed directly into reflow without pre-baking. This simplifies SMT line integration and reduces handling risk compared to higher MSL devices.
How does the S1A R3G compare to other S1x series variants like S1M?
The S1A R3G shares the same DO-214AC package and thermal characteristics as the S1x family but differs in rated voltage: S1A R3G is 50 V VRRM, while S1M is 1000 V. All variants share identical IF (1 A), IFSM (30–40 A), and TJ max (175°C), but VF, IR, and trr vary slightly across voltage grades. The S1A R3G is specifically selected for low-voltage rectification where 50 V isolation suffices.
S1A R3G 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):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 1.5 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 50 V
- Capacitance @ Vr, F:
- 12pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 175°C
S1A R3G FAQ
1.How can I place an order for S1A R3G through Aetrix?
Please submit a Request for Quotation (RFQ) for S1A R3G 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 S1A R3G reliable?
The price and inventory of S1A R3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1A R3G is usually 5 days.
3.What payment methods are accepted for S1A R3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1A R3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1A R3G?
S1A R3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1A R3G 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 S1A R3G?
For technical support, including S1A R3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1A R3G requirements.
6.How does Aetrix verify that S1A R3G is sourced from the original manufacturer or authorized distributors?
All S1A R3G 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 S1A R3G meets industry standards.
7.What is the process for return or replacement of S1A R3G?
All S1A R3G units undergo pre-shipment inspection (PSI). If there is an issue with S1A R3G, 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 S1A R3G part is unused and in its original packaging.
Return procedure for S1A R3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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