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Taiwan Semiconductor Corporation SS15LH
- Part No.:
- SS15LH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SS15LH.pdf
- Description:
- 1A, 50V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:3,190
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Product details
Overview
SS15LH from Taiwan Semiconductor is a 1 A, 50 V Schottky barrier surface-mount rectifier in Sub SMA package, featuring 0.58 V forward voltage at 0.5 A and 25 °C, 30 A peak surge current, and AEC-Q101 qualification for automotive-grade reliability-used in DC/DC converters and reverse battery protection circuits.
For engineers reviewing the SS15LH datasheet, SS15LH pinout, SS15LH application, or SS15LH equivalent, key selection criteria include its 50 V repetitive peak reverse voltage, 125–150 °C junction temperature range, low VF for high-efficiency power conversion, and Sub SMA footprint compatibility with automated SMT assembly.
Technical Context
The SS15LH operates as a single-die Schottky rectifier with unidirectional conduction, optimized for low-loss freewheeling and reverse polarity protection. Its guard ring structure enhances overvoltage robustness, while the matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements.
Thermally, it delivers RθJL = 45 °C/W and RθJA = 100 °C/W, enabling sustained 1 A operation up to 125 °C ambient when mounted on standard PCB copper. Reverse leakage remains ≤400 µA at 25 °C and ≤6 mA at 100 °C under rated 50 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in reverse-biased applications like reverse battery protection. |
| IF | 1 A continuous - Rated average forward current; supports compact DC/DC converter output stages without forced cooling. |
| VF | 0.58 V @ 0.5 A, 25 °C - Low conduction loss enables >92% efficiency in 5–12 V buck converters at light-to-moderate loads. |
| IFSM | 30 A @ 8.3 ms - Withstands motor startup surges and load dump transients in automotive subsystems. |
| TJ max | 125 °C or 150 °C - Dual-rated junction temperature allows flexible thermal design; 150 °C mode enables higher ambient operation in sealed enclosures. |
| RθJL | 45 °C/W - Enables direct thermal coupling to PCB copper pour for passive heatsinking in space-constrained layouts. |
| Package | Sub SMA - 2.7 mm × 4.2 mm footprint with gull-wing leads; compatible with IPC-7351B SO-232A land pattern and reflow profiles. |
Pinout & Package
Package: Sub SMA - surface-mount plastic case with cathode band marking, UL 94V-0 molding compound, and matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry node | Connected to input/source side in rectification; requires low-inductance trace routing for high-frequency switching stability. |
| Cathode | Forward current exit node / reverse voltage reference | Marked by visible band; ties to ground or return path; must maintain clean separation from noisy digital grounds. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements (HTOL, TC, HAST, UHAST), enabling use in engine control, lighting, and infotainment modules. |
| Guard ring structure | Improves edge termination robustness, raising dV/dt rating to 10,000 V/µs and reducing risk of premature avalanche breakdown during fast-switching transients. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; supports unlimited floor life and eliminates moisture-related popcorning during standard lead-free reflow. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for export-controlled and green-certified industrial and automotive programs. |
Applications
| DC/DC Converter Output Rectification | Reverse Battery Protection |
|---|---|
Use Scenario: Secondary-side rectification in isolated or non-isolated buck/boost converters powering microcontrollers and sensors in 12 V automotive systems. IC Role / Device Role / Timing Role: Unidirectional power switch conducting only during positive half-cycle; replaces slower PN diodes to reduce conduction loss and improve efficiency. Use Value: 0.58 V forward drop at 0.5 A lowers power dissipation by ~35% vs. comparable 1 A PN rectifiers, directly extending thermal margin in sealed ECUs. | Use Scenario: Preventing damage to downstream electronics during incorrect battery terminal connection in vehicle accessory modules. IC Role / Device Role / Timing Role: Series-connected anode-to-load, cathode-to-battery+; blocks reverse current flow while passing normal forward current with minimal voltage penalty. Use Value: 50 V VRRM safely withstands 12 V system load dumps (up to 40 V transient); 30 A IFSM handles brief short-circuit faults without failure. |
| Freewheeling Diode in Motor Drivers | Car Lighting Power Supply |
Use Scenario: Clamp inductive kickback from brushed DC motors in seat adjusters, window lifts, and HVAC actuators. IC Role / Device Role / Timing Role: Parallel to motor winding; conducts flyback current during MOSFET off-time to prevent voltage spikes exceeding driver IC ratings. Use Value: Fast recovery (Schottky) and 10,000 V/µs dV/dt rating suppress ringing and EMI, reducing need for snubbers and easing EMC compliance. | Use Scenario: Input rectification and hold-up in LED headlamp and interior lighting drivers powered from 12 V vehicle bus. IC Role / Device Role / Timing Role: Primary AC/DC or DC/DC front-end rectifier; handles continuous 1 A load with low self-heating under pulsed PWM dimming. Use Value: Sub SMA package fits tight headlamp PCBs; 125–150 °C TJ rating ensures reliability in thermally aggressive lamp housings near heat-generating LEDs. |
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-1N5819TR | 1 A, 40 V VRRM, 0.475 V VF @ 1 A - lower voltage rating, slightly lower VF but insufficient for 50 V designs. | Not suitable for 50 V reverse-bias applications; limited to ≤40 V systems like USB PD adapters or low-voltage IoT power rails. | Select only if system VR ≤ 40 V and lowest possible VF is prioritized over automotive qualification. |
| ON Semiconductor SB150 | 1 A, 50 V VRRM, 0.55 V VF @ 0.5 A - comparable voltage and current, but not AEC-Q101 qualified and higher RθJA (120 °C/W). | Lacks automotive stress validation; less thermally efficient on standard FR4, requiring larger copper area for same IF. | Acceptable for industrial or consumer DC/DC where AEC-Q101 is not mandated and board space permits enhanced thermal relief. |
Compared with VS-1N5819TR and SB150, SS15LH uniquely combines 50 V VRRM, AEC-Q101 qualification, and Sub SMA packaging-making it the only option among the three validated for automotive reverse battery protection and motor freewheeling in constrained, thermally demanding environments.
Availability
SS15LH is available at Aetrix Electronics and suitable for automotive lighting, DC/DC converter design, and reverse battery protection applications requiring stable component supply across multi-year production cycles.
Supply support for SS15LH 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 consumer markets since 1979.
The SS1xLH series was developed specifically for high-reliability automotive power conversion, emphasizing AEC-Q101 compliance, low VF, and robust surge handling in miniature Sub SMA packages for space-limited ECU and lighting modules.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for SS15LH?
The SS15LH has a VRRM of 50 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version A2103). This rating defines the highest reverse voltage the device can block continuously without breakdown and is strictly tied to the "15" in the part number, distinguishing it from SS12LH (20 V) and SS16LH (60 V).
Is SS15LH qualified for automotive applications?
Yes, SS15LH is AEC-Q101 qualified, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing-validating its suitability for under-hood and cabin automotive electronics.
What is the forward voltage (VF) of SS15LH at 1 A and 25 °C?
Per the Electrical Specifications table, SS15LH exhibits a maximum forward voltage of 0.700 V at 1.0 A and 25 °C. This value is measured under pulsed conditions (PW = 0.3 ms) and reflects worst-case conduction loss for thermal design at full rated current.
Does SS15LH have a guard ring structure?
Yes, SS15LH incorporates a guard ring for overvoltage protection, as listed in the FEATURES section. This structural enhancement improves edge termination reliability and contributes to its 10,000 V/µs critical rate of rise of off-state voltage (dV/dt), making it resilient against fast transients in switching power supplies.
What is the moisture sensitivity level (MSL) of SS15LH?
SS15LH has a moisture sensitivity level of MSL 1, per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60% RH without baking prior to surface-mount reflow. This eliminates pre-reflow dry-out steps and simplifies manufacturing for high-volume SMT lines.
SS15LH 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):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 400 µA @ 50 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
SS15LH FAQ
1.How can I place an order for SS15LH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS15LH 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 SS15LH reliable?
The price and inventory of SS15LH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS15LH is usually 5 days.
3.What payment methods are accepted for SS15LH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS15LH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS15LH?
SS15LH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS15LH 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 SS15LH?
For technical support, including SS15LH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS15LH requirements.
6.How does Aetrix verify that SS15LH is sourced from the original manufacturer or authorized distributors?
All SS15LH 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 SS15LH meets industry standards.
7.What is the process for return or replacement of SS15LH?
All SS15LH units undergo pre-shipment inspection (PSI). If there is an issue with SS15LH, 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 SS15LH part is unused and in its original packaging.
Return procedure for SS15LH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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