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Taiwan Semiconductor Corporation SS12HM2G
- Part No.:
- SS12HM2G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SS12HM2G.pdf
- Description:
- DIODE SCHOTTKY 20V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,399
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Product details
Overview
SS12HM2G 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, 40 A peak surge current, and -55°C to +125°C junction temperature range. It serves as a low-loss freewheeling or output rectifier in compact DC/DC converters and AC/DC adapters.
For engineers reviewing the SS12HM2G datasheet, SS12HM2G pinout, SS12HM2G application, or SS12HM2G equivalent, key selection criteria include its 20 V repetitive peak reverse voltage, 28 °C/W junction-to-lead thermal resistance, RoHS-compliant halogen-free construction, and J-STD-020 Level 1 moisture sensitivity rating for high-yield SMT assembly.
Technical Context
This Schottky rectifier uses a single-die silicon structure with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its low 0.50 V forward drop at rated current minimizes conduction loss in high-frequency switching topologies.
The device exhibits 200 µA maximum reverse leakage at 20 V and 25°C, 6 mA at 100°C, and maintains stable operation up to 125°C junction temperature. Thermal performance is characterized by 28 °C/W RθJL and 88 °C/W RθJA, supporting reliable power handling in constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Current (IF) | 1 A continuous - supports standard 1A-output DC/DC stages without derating at ambient ≤50°C |
| Peak Reverse Voltage (VRRM) | 20 V - suitable for 12V-input buck converters and low-voltage OR-ing applications |
| Forward Voltage (VF) | 0.50 V max @ 1A, 25°C - reduces power loss to ≤0.5 W per diode in high-efficiency designs |
| Peak Surge Current (IFSM) | 40 A @ 8.3 ms - withstands cold-start inrush and transient overloads in adapter circuits |
| Junction Temperature Range | -55°C to +125°C - enables deployment in industrial ambient environments without forced cooling |
| Thermal Resistance (RθJL) | 28 °C/W - allows direct heat transfer to PCB copper, simplifying thermal design |
| Moisture Sensitivity Level | J-STD-020 Level 1 - zero bake requirement before reflow, compatible with standard SMT lines |
Pinout & Package
Package: DO-214AC (SMA), surface-mount plastic case with cathode band polarity indicator, 0.060 g weight, UL 94V-0 molding compound, and JESD 201 Class 2 whisker-resistant terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to switch node or transformer secondary in flyback/buck topologies |
| Cathode | Current exit point under forward bias | Connected to output rail or ground return path; marked by visible band on body |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents premature edge breakdown at 20 V VRRM, improving reliability in voltage-transient-prone SMPS inputs |
| Low forward voltage | 0.50 V max at 1A/25°C - directly lowers conduction loss by ~30% vs. comparable 1A fast recovery diodes |
| High surge capability | 40 A non-repetitive peak - sustains repeated cold-start events in wall adapters without degradation |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive - required for CE-marked consumer electronics |
| Level 1 MSL rating | No floor life limitation or pre-bake needed - eliminates production delays in high-volume SMT assembly |
Applications
| Switching Mode Power Supply (SMPS) | AC/DC Adapter |
|---|---|
Use Scenario: Secondary-side rectification in 12V/1A isolated flyback converter. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time to maintain output current continuity. Use Value: 0.50 V VF limits conduction loss to 0.5 W, enabling >88% efficiency at full load without heatsinking. | Use Scenario: Output rectification in compact 5V/1A USB-C adapter. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC to downstream USB-PD controller. Use Value: DO-214AC footprint and Level 1 MSL enable direct placement on dense 2-layer PCBs with no process overhead. |
| Monitor Power Board | TV Standby Supply |
Use Scenario: Auxiliary 3.3V rail generation from main 12V bus in LCD monitor power section. IC Role / Device Role / Timing Role: Low-loss synchronous rectifier replacement in self-oscillating buck converter. Use Value: 28 °C/W RθJL allows thermal coupling to ground plane, maintaining <90°C junction temp at 70°C ambient. | Use Scenario: 5V standby output rectification in LED TV auxiliary power supply. IC Role / Device Role / Timing Role: High-reliability output diode operating continuously at light load with minimal leakage. Use Value: 200 µA max reverse leakage at 25°C ensures <1 mW standby dissipation, meeting Energy Star Tier 2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor SS12H | VF = 0.52 V max @ 1A/25°C; same 20 V VRRM, DO-214AC package | Identical thermal and electrical envelope; minor VF variance has negligible impact on 1A designs | Drop-in substitute where ON Semi sourcing is preferred; identical footprint and ratings |
| Vishay VS-1SQ02HM3/85A | 20 V VRRM, 1 A IF, but VF = 0.45 V typ @ 1A/25°C; SMA package, AEC-Q200 qualified | Lower typical VF improves efficiency marginally; AEC-Q200 adds automotive qualification not required for consumer use | Preferred for automotive-adjacent designs requiring stress-tested reliability; otherwise over-specified for adapter use |
Compared with SS12H and VS-1SQ02HM3/85A, the SS12HM2G offers identical 20 V/1 A ratings and DO-214AC packaging, with a balanced VF–leakage trade-off optimized for cost-sensitive consumer power supplies where AEC-Q200 is unnecessary.
Availability
SS12HM2G is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and monitor power boards requiring stable component supply across extended production cycles.
Supply support for SS12HM2G 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 Company (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 consumer markets.
The SS12HM2G belongs to TSC's SS1x Schottky rectifier family, engineered specifically for high-efficiency, low-profile AC/DC and DC/DC conversion in space-constrained consumer electronics.
FAQ
What is the maximum junction temperature rating for SS12HM2G?
The SS12HM2G has a maximum junction temperature (TJ) of +125°C, with operational capability from -55°C to +125°C. This rating is confirmed in the Absolute Maximum Ratings table of the official TSC datasheet (Version R2305, Page 2). The SS12HM2G must be thermally managed-using PCB copper area or thermal vias-to ensure junction temperature remains within this limit under full-load conditions.
Does SS12HM2G have a halogen-free and RoHS-compliant construction?
Yes, the SS12HM2G is both halogen-free and RoHS-compliant, as explicitly stated in the FEATURES section of the TSC datasheet (Version R2305, Page 1). The molding compound meets UL 94V-0 flammability standards, and the matte tin-plated leads satisfy J-STD-002 solderability requirements-making SS12HM2G suitable for CE-marked and eco-regulated consumer electronics.
What is the forward voltage specification for SS12HM2G at 1A and 100°C junction temperature?
At 1A forward current and 100°C junction temperature, the SS12HM2G exhibits a typical forward voltage of 0.40 V, with no maximum specified in the Electrical Specifications table (Page 2, Version R2305). This lower VF at elevated temperature reflects the positive temperature coefficient of Schottky diodes and supports stable operation in thermally demanding adapter or monitor power sections.
Is SS12HM2G suitable for automated SMT placement without moisture sensitivity concerns?
Yes, the SS12HM2G carries J-STD-020 Moisture Sensitivity Level 1, meaning it has unlimited floor life and requires no baking prior to reflow soldering. This is documented in the FEATURES list (Page 1, Version R2305) and verified in the Mechanical Data section-enabling seamless integration into high-speed pick-and-place lines without process interruption or yield risk.
What is the peak reverse leakage current of SS12HM2G at 125°C?
The SS12HM2G has no specified reverse leakage (IR) value at 125°C in the published datasheet (Version R2305, Page 2); only values at 25°C (≤200 µA), 100°C (≤6 mA), and 150°C (≤2 mA for higher-voltage variants) are provided. For worst-case design at 125°C, engineers should interpolate conservatively between 100°C and 150°C data or consult TSC application engineering for characterization reports.
SS12HM2G 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
SS12HM2G FAQ
1.How can I place an order for SS12HM2G through Aetrix?
Please submit a Request for Quotation (RFQ) for SS12HM2G 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 SS12HM2G reliable?
The price and inventory of SS12HM2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS12HM2G is usually 5 days.
3.What payment methods are accepted for SS12HM2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS12HM2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS12HM2G?
SS12HM2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS12HM2G 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 SS12HM2G?
For technical support, including SS12HM2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS12HM2G requirements.
6.How does Aetrix verify that SS12HM2G is sourced from the original manufacturer or authorized distributors?
All SS12HM2G 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 SS12HM2G meets industry standards.
7.What is the process for return or replacement of SS12HM2G?
All SS12HM2G units undergo pre-shipment inspection (PSI). If there is an issue with SS12HM2G, 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 SS12HM2G part is unused and in its original packaging.
Return procedure for SS12HM2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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