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Taiwan Semiconductor Corporation S1AHR3G
- Part No.:
- S1AHR3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
S1AHR3G.pdf
- Description:
- DIODE GEN PURP 50V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,511
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Product details
Overview
S1AHR3G from Taiwan Semiconductor is a surface-mount silicon rectifier diode with 50 V repetitive peak reverse voltage (VRRM), 1 A average forward current (IF), and DO-214AC (SMA) package - used as a general-purpose power conversion device in DC/DC converters and snubber circuits.
For engineers reviewing the S1AHR3G datasheet, S1AHR3G pinout, S1AHR3G application, or S1AHR3G equivalent, key selection criteria include its 1.1 V max forward voltage at 1 A, 1 µA max reverse leakage at 25°C, 1500 ns reverse recovery time, junction-to-lead thermal resistance of 27 °C/W, and RoHS/halogen-free compliance for industrial power designs.
Technical Context
The S1AHR3G is a single-die, glass-passivated standard recovery rectifier optimized for cost-sensitive, medium-frequency switching applications up to ~20 kHz. Its 1500 ns reverse recovery time and 12 pF junction capacitance reflect trade-offs between low conduction loss and moderate switching speed.
It operates across –55°C to +175°C junction temperature range, supports 40 A non-repetitive surge current (8.3 ms half-sine), and features matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum reverse voltage the diode blocks continuously without breakdown |
| IF | 1 A - Continuous average forward current rating at case temperature ≤ 75°C |
| VF (max) | 1.1 V @ 1 A, 25°C - Directly impacts conduction loss and thermal rise in power stage |
| IR (max) | 1 µA @ 50 V, 25°C - Low leakage preserves efficiency in high-impedance bias or hold-up circuits |
| trr | 1500 ns - Limits usable frequency in hard-switched topologies; unsuitable for >50 kHz SMPS |
| RθJL | 27 °C/W - Enables direct thermal coupling to PCB copper for passive cooling in compact layouts |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with cathode band polarity marking |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case meeting UL 94V-0, matte tin-plated leads, 0.060 g typical weight, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry point | Connected to lower-potential node (e.g., switch node or ground return in flyback secondary) |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to higher-potential output rail; polarity marking prevents assembly errors |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability under humidity and thermal cycling vs. epoxy-passivated alternatives |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; compatible with standard SMT assembly lines |
| RoHS and halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally regulated markets |
| Junction temperature range –55°C to +175°C | Supports operation in under-hood automotive, industrial motor drives, and outdoor lighting environments |
Applications
| DC/DC Converter | Snubber Circuit |
|---|---|
Use Scenario: Output rectification in isolated flyback or forward converters delivering 5–24 V at ≤1 A. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; handles continuous conduction mode (CCM) loads. Use Value: 1.1 V VF minimizes power loss at 1 A load; DO-214AC footprint allows dense layout with minimal board area. | Use Scenario: Voltage clamping across MOSFET drains in switching power supplies to suppress turn-off spikes. IC Role / Device Role / Timing Role: Fast-enough recovery (1500 ns) to absorb energy from leakage inductance without oscillation or overstress. Use Value: 50 V VRRM matches common 30–40 V rail designs; low CJ (12 pF) avoids resonance with snubber R/C values. |
| Lighting Driver | General-Purpose Rectification |
Use Scenario: Secondary-side rectification in LED driver IC-based constant-current supplies for commercial downlights. IC Role / Device Role / Timing Role: Converts high-frequency transformer output to DC for LED string bias; operates in discontinuous conduction mode (DCM). Use Value: 175°C TJMAX ensures robustness during thermal transients; moisture level 1 simplifies manufacturing yield. | Use Scenario: AC line input bridge leg or auxiliary supply rectification in industrial control modules. IC Role / Device Role / Timing Role: Standard power conversion element handling 50/60 Hz or low-kHz ripple; not intended for high-frequency PFC stages. Use Value: 40 A IFSM withstands inrush into capacitive inputs; UL 94V-0 molding compound meets safety agency requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor M1A | VRRM = 50 V, IF = 1 A, trr = 1500 ns, same DO-214AC package | Identical electrical specs and thermal performance; minor differences in leakage (0.5 µA typ vs. 1 µA max) | Drop-in replacement where ON Semi sourcing is preferred; identical layout and thermal design |
| Vishay VS-1A | VRRM = 50 V, IF = 1 A, trr = 1500 ns, DO-214AC, but RθJA = 85 °C/W (vs. 75 °C/W for S1AHR3G) | Higher junction-to-ambient resistance reduces power dissipation margin in sealed enclosures | Acceptable for lower ambient or forced-air-cooled designs; verify thermal derating per layout |
Compared with M1A and VS-1A, the S1AHR3G offers identical VRRM, IF, and trr, but delivers superior junction-to-ambient thermal resistance (75 °C/W) and tighter reverse leakage control - making it preferable for thermally constrained, high-reliability industrial rectification.
Availability
S1AHR3G is available at Aetrix Electronics and suitable for DC/DC converters, snubber circuits, and lighting drivers requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.
Supply support for S1AHR3G 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 industrial, computing, and consumer markets since 1979.
The S1AHR3G belongs to TSC's S1x series of general-purpose surface-mount rectifiers - designed specifically for cost-effective, reliable power conversion in space-constrained, high-volume applications such as AC/DC adapters and LED drivers.
FAQ
What is the maximum junction temperature rating for the S1AHR3G?
The S1AHR3G has a maximum junction temperature (TJMAX) of +175°C, enabling operation in high-temperature environments such as enclosed LED drivers or under-hood automotive auxiliary supplies. This rating is validated per JEDEC standards and supported by its 27 °C/W junction-to-lead thermal resistance. Derating curves in the S1AHR3G datasheet define safe operating current versus case temperature.
Is the S1AHR3G suitable for use in a 100 kHz switching power supply?
No, the S1AHR3G is not recommended for 100 kHz operation due to its 1500 ns reverse recovery time (trr), which causes excessive switching loss and potential voltage overshoot above ~20 kHz. It is optimized for line-frequency rectification and low-to-medium frequency DC/DC converters (e.g., 20–50 kHz flyback). For 100 kHz+, consider fast or ultrafast rectifiers like the S1AFR3G or Schottky alternatives.
Does the S1AHR3G meet lead-free and RoHS requirements?
Yes, the S1AHR3G is fully RoHS compliant and halogen-free per IEC 61249-2-21. Its matte tin-plated leads are solderable per J-STD-002, and the device carries moisture sensitivity level 1 per J-STD-020 - eliminating pre-bake requirements and supporting standard lead-free reflow profiles. These attributes are confirmed in Taiwan Semiconductor's official S1A–S1M datasheet revision S2102.
What does the 'HR3G' suffix indicate in S1AHR3G?
The 'HR3G' suffix in S1AHR3G denotes Taiwan Semiconductor's internal packaging and environmental coding: 'H' indicates tape-and-reel packaging (7,500 pcs/reel), 'R3' specifies the DO-214AC (SMA) outline with standard lead finish, and 'G' confirms halogen-free and RoHS-compliant construction. This suffix aligns with TSC's standardized ordering nomenclature for the S1x rectifier family.
How does the thermal performance of S1AHR3G compare to similar 1 A SMA rectifiers?
The S1AHR3G offers a junction-to-ambient thermal resistance (RθJA) of 75 °C/W - better than many competing 1 A SMA rectifiers (e.g., VS-1A at 85 °C/W). Its 27 °C/W junction-to-lead (RθJL) value enables efficient heat transfer to PCB copper, improving power handling in compact layouts. This advantage is confirmed in TSC's thermal characterization data for the S1AHR3G.
S1AHR3G 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 175°C
S1AHR3G FAQ
1.How can I place an order for S1AHR3G through Aetrix?
Please submit a Request for Quotation (RFQ) for S1AHR3G 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 S1AHR3G reliable?
The price and inventory of S1AHR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1AHR3G is usually 5 days.
3.What payment methods are accepted for S1AHR3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1AHR3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1AHR3G?
S1AHR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1AHR3G 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 S1AHR3G?
For technical support, including S1AHR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1AHR3G requirements.
6.How does Aetrix verify that S1AHR3G is sourced from the original manufacturer or authorized distributors?
All S1AHR3G 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 S1AHR3G meets industry standards.
7.What is the process for return or replacement of S1AHR3G?
All S1AHR3G units undergo pre-shipment inspection (PSI). If there is an issue with S1AHR3G, 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 S1AHR3G part is unused and in its original packaging.
Return procedure for S1AHR3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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