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Taiwan Semiconductor Corporation SS310ALH
- Part No.:
- SS310ALH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SS310ALH.pdf
- Description:
- 3A, 100V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:9,238
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Product details
Overview
SS310ALH from Taiwan Semiconductor is a 3A, 100V Schottky barrier surface-mount rectifier in Thin SMA package, featuring low forward voltage (0.76 V at 3.0 A, 25°C), high surge capability (70 A IFSM), AEC-Q101 qualification, and junction temperature rating up to +150°C. It serves as a primary output rectifier in compact DC/DC converters for automotive infotainment systems.
For engineers reviewing the SS310ALH datasheet, SS310ALH pinout, SS310ALH application, or SS310ALH equivalent, key selection criteria include reverse voltage margin (100 V VRRM), thermal resistance (RθJL = 19 °C/W), junction capacitance (86 pF), and automotive-grade reliability per AEC-Q101.
Technical Context
The SS310ALH uses a single-die Schottky structure optimized for low conduction loss in medium-voltage switching applications. Its 100 V VRRM and 0.76 V VF at 3 A balance efficiency and breakdown safety margin in 48 V–60 V input DC/DC stages.
Thermal performance is defined by RθJL = 19 °C/W and RθJA = 81 °C/W on a 5 mm × 5 mm Cu pad, enabling reliable operation at full 3 A load up to +125°C ambient when mounted per recommended layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; sets upper limit for DC bus voltage in buck-derived topologies |
| IF | 3 A continuous - Rated average forward current; defines steady-state power delivery capacity |
| IFSM | 70 A (8.3 ms) - Peak non-repetitive surge current; supports cold-start inrush and transient overload |
| VF | 0.76 V @ 3.0 A, 25°C - Forward drop directly impacts conduction loss and thermal design in high-efficiency SMPS |
| CJ | 86 pF @ 1 MHz, 4 V - Junction capacitance affects switching loss and EMI in high-frequency (>300 kHz) converters |
| TJ max | +150°C - Maximum junction temperature enables operation in under-hood automotive environments |
| RθJL | 19 °C/W - Low junction-to-lead thermal resistance allows efficient heat transfer to PCB copper |
Pinout & Package
Package: Thin SMA - Surface-mount package with matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound, and cathode band polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to higher-potential node (e.g., switch node in synchronous buck); requires thermal relief pad for soldering |
| Cathode | Output current exit point | Connected to output rail; cathode band identifies terminal; must be routed with low-inductance path to minimize ringing |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| Low VF at high current | 0.63 V @ 3.0 A, 125°C - Reduces conduction loss by ~18% vs. comparable 100 V Schottkys at elevated temperature |
| Thin SMA package | Height ≤ 2.3 mm - Enables ultra-low-profile power stages in space-constrained modules like ADAS camera ECUs |
| High IFSM/IF ratio | 70 A / 3 A = 23.3 - Supports >20× overload tolerance for short-duration transients without bond-wire failure |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - Required for automotive OEM supply chain compliance |
Applications
| Automotive Infotainment Power Supply | Industrial IoT Gateway DC/DC Stage |
|---|---|
Use Scenario: 12 V–48 V input DC/DC converter powering display controller and audio DSP in head unit. IC Role / Device Role / Timing Role: Output rectifier in synchronous buck topology operating at 500 kHz. Use Value: 0.76 V VF minimizes conduction loss at 3 A load; AEC-Q101 ensures reliability over 15-year vehicle lifetime. | Use Scenario: Isolated 24 V input–3.3 V output flyback converter in edge sensor gateway. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement in quasi-resonant flyback. Use Value: 86 pF CJ reduces switching loss and EMI compared to higher-capacitance alternatives at 300–600 kHz switching. |
| LED Driver for Commercial Lighting | Telecom Base Station Auxiliary Supply |
Use Scenario: Constant-current LED driver with 36 V output using buck-boost architecture. IC Role / Device Role / Timing Role: Input rectifier handling 3 A peak current during PWM dimming transitions. Use Value: 70 A IFSM withstands repeated 10 ms surges from line transients without degradation. | Use Scenario: 48 V telecom rectified input feeding isolated auxiliary 5 V/12 V supply. IC Role / Device Role / Timing Role: Primary-side bridge rectifier in offline AC-DC front-end (with external bridge). Use Value: +150°C TJ max supports operation in sealed, fanless base station enclosures up to +85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-3EY10-M3/5BT | Same 100 V VRRM, 3 A IF, but VF = 0.79 V @ 3 A (25°C); RθJA = 90 °C/W | Slightly higher conduction loss; less suitable for thermally constrained 125°C ambient designs | Preferred where cost sensitivity outweighs 3% efficiency penalty and thermal margin is ample |
| ON Semiconductor SB3100 | 100 V VRRM, 3 A IF, VF = 0.82 V @ 3 A (25°C); not AEC-Q101 qualified | Lacks automotive qualification; junction temp limited to +125°C | Acceptable for industrial lighting or consumer adapters where automotive reliability is not required |
Compared with VS-3EY10-M3/5BT and SB3100, the SS310ALH delivers lower forward voltage, superior thermal resistance, and certified AEC-Q101 compliance-making it the optimal choice for automotive and high-reliability industrial DC/DC converters requiring long-term stability at elevated temperatures.
Availability
SS310ALH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial IoT gateways, and commercial LED drivers requiring stable component supply across multi-year production cycles.
Supply support for SS310ALH 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 automotive, industrial, and computing markets since 1979.
The SS310ALH belongs to TSC's AEC-Q101-qualified Schottky rectifier family, engineered specifically for high-efficiency, high-reliability DC/DC conversion in automotive and harsh-environment industrial applications.
FAQ
What is the maximum junction temperature rating for the SS310ALH?
The SS310ALH has a maximum junction temperature (TJ) rating of +150°C, verified per AEC-Q101 stress testing. This allows sustained operation in under-hood automotive environments and sealed industrial enclosures. Derating curves in the datasheet confirm 3 A continuous current is maintainable up to +125°C ambient when mounted on a 5 mm × 5 mm Cu pad. The SS310ALH must not exceed this limit to ensure long-term reliability and parametric stability.
Is the SS310ALH pin-compatible with other parts in the SS3xALH series?
Yes-the SS310ALH shares identical Thin SMA package dimensions, lead finish, polarity marking (cathode band), and mechanical footprint with SS34ALH through SS320ALH. All variants use the same anode/cathode terminal configuration and mounting recommendations. However, electrical parameters-including VRRM, VF, and IR-vary by voltage grade, so direct substitution requires verification of reverse voltage margin and thermal performance in the target circuit.
Does the SS310ALH meet automotive qualification standards?
Yes, the SS310ALH is explicitly qualified to AEC-Q101 Rev D for discrete semiconductors. Testing includes HTGB, HTRB, temperature cycling, ESD (HBM ≥ 2 kV), and mechanical robustness per JESD201 Class 2 whisker resistance. This qualification is documented in Taiwan Semiconductor's official certification report and applies specifically to the SS310ALH lot release, not inferred from family-level data.
What is the typical junction capacitance of the SS310ALH and how does it affect high-frequency operation?
The SS310ALH exhibits a typical junction capacitance (CJ) of 86 pF measured at 1 MHz and 4 V reverse bias. This value directly influences switching loss and EMI generation in converters operating above 300 kHz. Lower CJ versus higher-voltage variants (e.g., SS320ALH at 54 pF) reflects optimized die geometry-enabling faster recovery and reduced capacitive turn-on loss in high-frequency synchronous rectification stages.
How does the forward voltage of the SS310ALH change with temperature and current?
The SS310ALH forward voltage decreases with rising junction temperature: at 3.0 A, VF drops from 0.76 V at 25°C to 0.63 V at 125°C. This negative temperature coefficient improves thermal stability in parallel configurations. At fixed temperature, VF increases linearly with current-reaching 0.88 V (max) at 3.0 A and 25°C. These values are measured per JEDEC JESD24-11 pulse conditions and define conduction loss boundaries for thermal modeling of the SS310ALH.
SS310ALH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 880 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 100 V
- Capacitance @ Vr, F:
- 54pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Thin SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS310ALH FAQ
1.How can I place an order for SS310ALH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS310ALH 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 SS310ALH reliable?
The price and inventory of SS310ALH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS310ALH is usually 5 days.
3.What payment methods are accepted for SS310ALH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS310ALH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS310ALH?
SS310ALH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS310ALH 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 SS310ALH?
For technical support, including SS310ALH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS310ALH requirements.
6.How does Aetrix verify that SS310ALH is sourced from the original manufacturer or authorized distributors?
All SS310ALH 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 SS310ALH meets industry standards.
7.What is the process for return or replacement of SS310ALH?
All SS310ALH units undergo pre-shipment inspection (PSI). If there is an issue with SS310ALH, 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 SS310ALH part is unused and in its original packaging.
Return procedure for SS310ALH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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