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Taiwan Semiconductor Corporation SS12HR3G
- Part No.:
- SS12HR3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SS12HR3G.pdf
- Description:
- DIODE SCHOTTKY 20V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,887
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Product details
Overview
SS12HR3G from Taiwan Semiconductor is a 1A, 20V Schottky barrier surface-mount rectifier in DO-214AC (SMA) package, featuring 0.50 V forward voltage at 1A/25°C, 40A peak surge current, and junction temperature rating up to +125°C. It serves as a low-loss output rectifier in compact AC/DC adapters and DC/DC converters.
For engineers reviewing the SS12HR3G datasheet, SS12HR3G pinout, SS12HR3G application, or SS12HR3G equivalent, key selection criteria include forward voltage drop at operating temperature, reverse leakage at rated VRRM, thermal resistance (RθJL = 28°C/W), and compatibility with automated SMT placement per J-STD-020 Level 1 moisture sensitivity.
Technical Context
The SS12HR3G implements a single-die Schottky junction optimized for high-efficiency, low-voltage rectification. Its 20V repetitive peak reverse voltage (VRRM) and 14V RMS reverse voltage define its use in secondary-side outputs of low-input-voltage SMPS topologies.
With 0.50 V typical forward voltage at 1A/25°C and 0.40 V at 100°C, it delivers stable conduction loss across industrial temperature range. The guard ring structure provides overvoltage protection, while matte tin-plated leads ensure reliable solderability per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum non-repetitive reverse voltage before breakdown; sets upper limit for output rail voltage in adapter designs |
| IF | 1 A - Continuous average forward current; defines steady-state power delivery capability |
| VF @ 1A, 25°C | 0.50 V max - Directly determines conduction loss (0.5 W at 1A); critical for thermal budget in sealed enclosures |
| IFSM | 40 A - Peak surge current for 8.3 ms half-sine; supports inrush handling in offline input stages |
| RθJL | 28 °C/W - Junction-to-lead thermal resistance; enables direct heatsinking via PCB copper pour under cathode pad |
| IR @ 20V, 25°C | 200 μA max - Reverse leakage at rated voltage; impacts standby power in energy-efficient adapters |
| TJ max | +125 °C - Maximum operating junction temperature; constrains ambient derating in high-density layouts |
Pinout & Package
Package: DO-214AC (SMA), surface-mount plastic case with cathode band marking; dimensions per JEDEC DO-214AC, weight ≈ 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to transformer secondary or switching node; requires adequate trace width for 1A continuous current |
| Cathode | Output terminal for forward conduction | Marked by band; ties to output capacitor and load; primary thermal path to PCB via exposed metal pad |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.50 V max at 1A/25°C reduces conduction loss by >30% vs. comparable PN-junction rectifiers |
| Guard ring structure | Enhances ruggedness against transient overvoltage events without external snubbers |
| J-STD-020 Level 1 MSL | Enables standard reflow without baking; supports high-yield automated assembly |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for green electronics manufacturing |
| High surge current rating | 40A IFSM withstands repeated line transients and cold-start surges in consumer power supplies |
Applications
| AC/DC Adapters | DC/DC Converters |
|---|---|
Use Scenario: 5–12 V, 1A output wall adapters for IoT sensors and USB peripherals. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC. Use Value: 0.50 V VF minimizes heat generation in space-constrained plastic housings, enabling passive cooling. | Use Scenario: Point-of-load (POL) buck converter in industrial control modules. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in low-voltage, high-efficiency secondary-side rectification. Use Value: Low RθJL (28°C/W) allows direct thermal coupling to PCB ground plane, reducing need for thermal vias. |
| Monitor Power Supplies | TV Standby Circuits |
Use Scenario: Auxiliary 5 V/1A supply in LCD monitor mainboard for logic and backlight control. IC Role / Device Role / Timing Role: Primary output rectifier in flyback-derived auxiliary winding circuit. Use Value: 200 μA max reverse leakage at 20 V ensures sub-1 mW standby power consumption compliance. | Use Scenario: Always-on 3.3 V rail in smart TV mainboards supporting remote wake-up. IC Role / Device Role / Timing Role: Low-loss rectifier in quasi-resonant flyback standby stage. Use Value: Guard ring design improves reliability during repeated AC cycling and brown-out conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS12H-E3/5AT (Vishay) | VRRM = 20 V, VF = 0.52 V max @ 1A/25°C, RθJA = 90°C/W | Slightly higher thermal resistance; same DO-214AC footprint | Preferred where Vishay qualification or alternate sourcing is required; identical mounting and layout |
| SB120-TB (ON Semiconductor) | VRRM = 20 V, VF = 0.55 V max @ 1A/25°C, IR = 500 μA max @ 20V/25°C | Higher reverse leakage limits ultra-low-standby designs | Acceptable for cost-sensitive general-purpose supplies where leakage <200 μA is not mandated |
Compared with SS12HR3G, SS12H-E3/5AT offers near-identical electrical performance and mechanical fit, while SB120-TB trades lower cost for higher leakage-making SS12HR3G optimal for energy-efficient adapter designs requiring tight standby power control.
Availability
SS12HR3G is available at Aetrix Electronics and suitable for AC/DC adapters, DC/DC converters, and monitor power supplies requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.
Supply support for SS12HR3G 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 management and industrial markets since 1979.
The SS12HR3G belongs to TSC's SS1x Schottky rectifier family, engineered specifically for high-efficiency, low-voltage secondary-side rectification in compact consumer and industrial power supplies.
FAQ
What is the maximum junction temperature rating for SS12HR3G?
The SS12HR3G has a maximum junction temperature (TJ) rating of +125°C. This value is specified in the Absolute Maximum Ratings table and applies under continuous operation at rated current. Derating is required above 25°C ambient per the Forward Current Derating Curve in the datasheet. Thermal design must ensure the SS12HR3G junction stays within this limit to maintain reliability and parametric stability.
Does SS12HR3G have a halogen-free and RoHS-compliant construction?
Yes, the SS12HR3G is both halogen-free and RoHS compliant, as explicitly stated in the FEATURES section of the official Taiwan Semiconductor datasheet (Version R2305). The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002. These attributes make SS12HR3G suitable for environmentally regulated electronics markets including EU and China RoHS zones.
What is the forward voltage of SS12HR3G at 1A and 100°C?
The SS12HR3G exhibits a typical forward voltage of 0.40 V at 1A and 100°C, as confirmed in the ELECTRICAL SPECIFICATIONS table. This lower VF compared to room-temperature operation reflects the positive temperature coefficient of Schottky diodes and directly improves conduction efficiency in thermally stressed environments such as enclosed adapters or high-ambient industrial DC/DC converters using SS12HR3G.
Is SS12HR3G suitable for automated SMT assembly?
Yes, SS12HR3G is designed for automated placement and reflow soldering. It carries J-STD-020 Moisture Sensitivity Level 1 rating, meaning it can be stored indefinitely at ≤30°C/60% RH and processed using standard Pb-free reflow profiles without pre-baking. Its DO-214AC (SMA) package geometry and matte tin-plated leads comply with J-STD-002 solderability requirements, ensuring high first-pass yield in high-volume SS12HR3G assembly lines.
What does the "R3G" suffix in SS12HR3G indicate?
The "R3G" suffix in SS12HR3G denotes Taiwan Semiconductor's green-compliant packaging variant: "R" indicates tape-and-reel packaging (7,500 units per reel), "3" specifies the DO-214AC (SMA) package, and "G" signifies halogen-free and RoHS-compliant materials. This coding aligns with TSC's standardized ordering nomenclature documented in the ORDERING INFORMATION section of the SS12–SS115 datasheet.
SS12HR3G 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:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SS12HR3G FAQ
1.How can I place an order for SS12HR3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SS12HR3G 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 SS12HR3G reliable?
The price and inventory of SS12HR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS12HR3G is usually 5 days.
3.What payment methods are accepted for SS12HR3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS12HR3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS12HR3G?
SS12HR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS12HR3G 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 SS12HR3G?
For technical support, including SS12HR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS12HR3G requirements.
6.How does Aetrix verify that SS12HR3G is sourced from the original manufacturer or authorized distributors?
All SS12HR3G 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 SS12HR3G meets industry standards.
7.What is the process for return or replacement of SS12HR3G?
All SS12HR3G units undergo pre-shipment inspection (PSI). If there is an issue with SS12HR3G, 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 SS12HR3G part is unused and in its original packaging.
Return procedure for SS12HR3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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