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Taiwan Semiconductor Corporation SS310LH
- Part No.:
- SS310LH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SS310LH.pdf
- Description:
- 3A, 100V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:7,753
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Product details
Overview
SS310LH from Taiwan Semiconductor is a 100 V, 3 A surface-mount Schottky barrier rectifier in Sub SMA package, featuring 0.85 V forward voltage at 3 A and 100 µA reverse leakage at 25°C, designed for high-efficiency DC/DC converters and automotive reverse battery protection.
For engineers reviewing the SS310LH datasheet, SS310LH pinout, SS310LH application, or SS310LH equivalent, key selection criteria include peak reverse voltage (100 V), surge current rating (80 A), junction temperature range (–55°C to +150°C), thermal resistance (RθJA = 60°C/W), and AEC-Q101 qualification for automotive reliability.
Technical Context
The SS310LH employs a single-die Schottky structure with guard ring overvoltage protection and matte tin-plated leads compliant with J-STD-002 solderability. Its 100 V VRRM and 0.85 V VF at 3 A enable low-loss operation in high-frequency switching topologies.
Thermal performance is defined by RθJC = 30°C/W and RθJA = 60°C/W, supporting continuous 3 A conduction up to 125°C ambient when mounted on standard PCB copper. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in reverse-biased applications like freewheeling or reverse polarity protection. |
| IF | 3 A - Continuous forward current rating; determines steady-state power delivery capability in DC/DC output stages. |
| IFSM | 80 A - Non-repetitive peak surge current (8.3 ms half-sine); supports transient load dumps and inrush events without failure. |
| VF @ 3 A, 25°C | 0.85 V - Forward voltage drop; directly impacts conduction loss (Pcond ≈ 2.55 W) and thermal design in high-current paths. |
| IR @ 100 V, 25°C | 100 µA - Reverse leakage current; low value minimizes standby power loss in battery-critical systems like car lighting. |
| TJ Range | –55°C to +150°C - Extended junction temperature range enables use in under-hood automotive environments without derating. |
| RθJA | 60°C/W - Junction-to-ambient thermal resistance; used to calculate temperature rise (ΔT = Pdiss × 60) for PCB layout thermal management. |
Pinout & Package
Package: Sub SMA - Surface-mount plastic package with cathode band marking, UL 94V-0 molding compound, and matte tin-plated leads. Dimensions conform to standard Sub SMA outline (length: 4.3 mm, width: 2.6 mm, height: 2.2 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter); requires adequate copper pour for thermal dissipation. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to higher-potential rail (e.g., output capacitor positive); critical for polarity-sensitive reverse battery protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in production car electronics without additional qualification. |
| Guard ring structure | Enhances edge termination robustness against voltage transients and localized field crowding-improves long-term stability in noisy 12 V/24 V battery systems. |
| Moisture sensitivity level 1 | No bake requirement prior to reflow; compatible with standard SMT assembly lines without process modification or dry pack handling. |
| High IFSM/IF ratio (26.7×) | Supports >25× overload margin during cold-crank or jump-start events-reduces need for external surge clamping in starter motor circuits. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives-ensures compliance for global automotive OEM supply chains and end-of-life recycling. |
Applications
| Automotive Reverse Battery Protection | DC/DC Converter Output Rectification |
|---|---|
Use Scenario: Installed between vehicle battery and ECU power input to block reverse polarity connection during service or jump-start errors. IC Role / Device Role / Timing Role: Unidirectional current valve preventing destructive reverse current flow into sensitive downstream circuitry. Use Value: 100 V VRRM withstands load dump transients; 0.85 V VF limits voltage drop and heat generation during normal 12 V operation. | Use Scenario: Used as secondary-side rectifier in 300 kHz synchronous buck converter powering ADAS camera modules. IC Role / Device Role / Timing Role: High-frequency unidirectional conduction path replacing MOSFET synchronous rectification where gate drive complexity is undesirable. Use Value: Low 0.85 V forward drop reduces conduction loss vs. silicon diodes; 80 A IFSM handles startup surges without derating. |
| Freewheeling Diode in BLDC Motor Drivers | Car Interior Lighting Power Supply |
Use Scenario: Placed across motor phase windings in 3-phase inverter to provide current recirculation path during PWM off-time. IC Role / Device Role / Timing Role: Fast-recovery freewheeling element minimizing voltage spikes and electromagnetic interference during switching transitions. Use Value: Schottky architecture ensures near-zero reverse recovery time; 100 µA IR at 25°C prevents leakage-induced dimming in low-power LED strings. | Use Scenario: Integrated into constant-current LED driver for dome lights and map lamps powered from 12 V vehicle bus. IC Role / Device Role / Timing Role: Input polarity protection and output rectification in isolated flyback or non-isolated buck-boost topology. Use Value: AEC-Q101 qualification ensures lifetime reliability in thermally cycled cabin environments; Sub SMA footprint allows compact board layout. |
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-3EYH01-M3/5AT | Same Sub SMA package, 100 V VRRM, but higher VF (0.92 V @ 3 A) and lower IFSM (60 A). | Limited surge margin in load-dump-prone automotive modules; less suitable for high-peak-current freewheeling. | Prefer SS310LH where lower conduction loss and higher surge tolerance are required. |
| ON Semiconductor SB3100 | Identical 100 V/3 A rating, but rated only to +125°C TJ and not AEC-Q101 qualified. | Not approved for automotive under-hood use; acceptable for industrial DC/DC where qualification is not mandated. | Select SS310LH for automotive production; SB3100 may reduce cost in non-automotive designs. |
Compared with VS-3EYH01-M3/5AT and SB3100, the SS310LH delivers superior thermal margin (150°C TJ), lower forward loss, and certified automotive reliability-making it the preferred choice for safety-critical or high-temperature vehicle subsystems.
Availability
SS310LH is available at Aetrix Electronics and suitable for automotive reverse battery protection, DC/DC converter output rectification, and freewheeling diode applications requiring stable component supply and AEC-Q101 compliance.
Supply support for SS310LH 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, specializing in power devices, rectifiers, and protection components.
The SS310LH belongs to TSC's SS3xLH Schottky rectifier family, engineered specifically for high-efficiency, high-reliability automotive and industrial power conversion where low VF, robust surge capability, and extended temperature operation are essential.
FAQ
What is the maximum junction temperature rating for the SS310LH?
The SS310LH has a maximum junction temperature (TJ) rating of +150°C, verified per AEC-Q101 stress testing. This allows operation in high-ambient under-hood automotive environments without thermal derating below 3 A continuous current, provided PCB thermal design maintains RθJA ≤ 60°C/W. The SS310LH datasheet specifies this limit across all operating conditions.
Is the SS310LH pin-compatible with other parts in the SS3xLH series?
Yes, the SS310LH shares identical Sub SMA package dimensions, pinout, and mounting footprint with SS34LH and SS36LH. All variants use anode/cathode terminals in the same physical orientation and marking (cathode band), enabling direct PCB layout reuse across the family when voltage rating changes are acceptable.
Does the SS310LH require special handling during reflow soldering?
No-the SS310LH is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and placed directly into standard lead-free reflow profiles without baking. Its matte tin-plated leads meet J-STD-002 solderability requirements, ensuring reliable wetting in automated SMT lines.
What is the reverse leakage current specification for the SS310LH at elevated temperature?
At 100 V reverse bias and +125°C junction temperature, the SS310LH exhibits a maximum reverse leakage current (IR) of 5 mA, as specified in the electrical characteristics table. This value is critical for low-power automotive modules where standby current must remain below microamp thresholds; the SS310LH's 100 µA at 25°C supports tight system-level leakage budgets.
How does the guard ring feature improve reliability in automotive applications?
The guard ring in the SS310LH enhances edge termination robustness against localized electric field concentration during voltage transients such as load dump or ISO 7637-2 pulses. By distributing stress away from the active junction periphery, it prevents premature avalanche breakdown and extends operational life in harsh 12 V/24 V battery systems-directly contributing to the SS310LH's AEC-Q101 qualification.
SS310LH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 850 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS310LH FAQ
1.How can I place an order for SS310LH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS310LH 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 SS310LH reliable?
The price and inventory of SS310LH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS310LH is usually 5 days.
3.What payment methods are accepted for SS310LH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS310LH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS310LH?
SS310LH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS310LH 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 SS310LH?
For technical support, including SS310LH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS310LH requirements.
6.How does Aetrix verify that SS310LH is sourced from the original manufacturer or authorized distributors?
All SS310LH 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 SS310LH meets industry standards.
7.What is the process for return or replacement of SS310LH?
All SS310LH units undergo pre-shipment inspection (PSI). If there is an issue with SS310LH, 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 SS310LH part is unused and in its original packaging.
Return procedure for SS310LH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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