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Taiwan Semiconductor Corporation SS115ALH
- Part No.:
- SS115ALH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SS115ALH.pdf
- Description:
- 1A, 150V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:4,822
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Product details
Overview
SS115ALH from Taiwan Semiconductor is a 1 A, 150 V Schottky barrier surface-mount rectifier in Thin SMA package, featuring low forward voltage (0.78 V @ 1 A, 25°C), high surge capability (30 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 SS115ALH datasheet, SS115ALH pinout, SS115ALH application, or SS115ALH equivalent, key selection criteria include reverse voltage margin (150 V VRRM), thermal resistance (RθJL = 24 °C/W), low leakage (<10 µA @ 25°C), and compatibility with automated SMT assembly on standard FR-4 PCBs.
Technical Context
The SS115ALH employs a single-die Schottky structure optimized for fast switching and minimal conduction loss in medium-voltage DC/DC topologies. Its 150 V peak reverse voltage supports 48 V bus-derived supplies while maintaining <0.72 V forward drop at 1 A and 125°C junction temperature.
Thermal performance is defined by RθJL = 24 °C/W and RθJA = 78 °C/W on a 5 mm × 5 mm Cu pad, enabling reliable operation under sustained 1 A load without forced airflow. Reverse leakage remains ≤1 mA at 125°C, supporting stable regulation in thermally constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - supports input transients up to 125% of nominal 48 V rail in automotive DC/DC designs |
| IF | 1 A continuous - rated for steady-state output current in sub-12 W isolated flyback or buck-boost converters |
| VF @ 1 A, 25°C | 0.78 V max - reduces conduction loss to ≤0.78 W per device, easing thermal management |
| IFSM (8.3 ms) | 30 A - withstands inrush and short-circuit surges without bond-wire failure |
| RθJL | 24 °C/W - enables direct heat transfer to PCB copper, limiting junction rise to ~24°C above lead temp at 1 A |
| CJ @ 1 MHz, 4 V | 34 pF - minimizes switching node ringing and EMI in >100 kHz SMPS designs |
| IR @ VR, 125°C | 1 mA max - ensures stable no-load regulation and low standby power in always-on modules |
Pinout & Package
Package: Thin SMA (DO-214AC), surface-mount, cathode indicated by band. Dimensions per TSC spec: 4.3 × 2.6 × 2.1 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current source terminal | Connected to transformer secondary or switch node; handles full forward current and surge energy |
| Cathode | Output current sink terminal | Feeds output filter capacitor and load; polarity marked by molded band; must route to low-impedance ground return |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD47 |
| Low VF at high TJ | 0.63 V @ 1 A, 125°C - maintains efficiency >85% in hot under-hood environments |
| Moisture sensitivity level 1 | No bake required before reflow - compatible with standard SMT lines without dry-pack handling |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU - suitable for green manufacturing and export compliance |
| High IFSM/IF ratio (30×) | Robustness against line transients and output shorts - eliminates need for parallel diodes in cost-sensitive designs |
Applications
| Automotive Infotainment Power Supply | Industrial IoT Sensor Node DC/DC |
|---|---|
Use Scenario: 48 V to 5 V/3.3 V conversion in head-unit display modules exposed to engine-bay temperatures. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck-boost converter operating at 250–500 kHz. Use Value: 150 V VRRM provides 3× safety margin over 48 V nominal, while 0.72 V VF @ 125°C sustains efficiency >87% at full load and +105°C ambient. | Use Scenario: Battery-powered wireless sensor node requiring ultra-low quiescent current and high light-load efficiency. IC Role / Device Role / Timing Role: Secondary-side rectifier in flyback converter with burst-mode control and variable frequency. Use Value: 10 µA reverse leakage @ 25°C minimizes no-load power draw; 34 pF capacitance reduces switching losses during light-load transitions. |
| LED Driver Secondary Rectification | Telecom Wall Adapter Output Stage |
Use Scenario: Constant-current LED driver for commercial lighting, operating from 24–48 V input with PWM dimming. IC Role / Device Role / Timing Role: Freewheeling diode in buck regulator controlling LED string current. Use Value: 30 A IFSM tolerates PWM-induced current spikes; 150 V rating accommodates 48 V input with 20% ripple and transient margin. | Use Scenario: Universal-input (90–264 V AC) wall adapter delivering 12 V/1 A to networking equipment. IC Role / Device Role / Timing Role: Output rectifier in LLC resonant converter secondary stage. Use Value: RθJL = 24 °C/W allows direct thermal coupling to PCB ground plane, eliminating heatsink in space-constrained adapters. |
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-1N5819-M3/54 | 40 V VRRM, 1 A, higher VF (0.9 V @ 1 A), no AEC-Q101 | Limited to ≤24 V systems; unsuitable for automotive 48 V architectures | Select only for cost-sensitive, non-automotive 12 V applications where 150 V margin is unnecessary |
| ON Semiconductor SB1150-T | 150 V VRRM, 1 A, similar VF (0.82 V @ 1 A), AEC-Q101 qualified, SMA package | Identical voltage/current rating and qualification; slightly higher VF increases conduction loss by ~5% | Drop-in alternative if SS115ALH lead time exceeds 12 weeks; verify layout compatibility with ON's mechanical drawing |
Compared with VS-1N5819-M3/54 and SB1150-T, the SS115ALH delivers optimal balance of 150 V robustness, 0.78 V low forward drop, and AEC-Q101 compliance-making it preferred for thermally demanding automotive and industrial DC/DC outputs where reliability and efficiency are co-prioritized.
Availability
SS115ALH is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial IoT sensor nodes, and telecom wall adapters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SS115ALH 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, protection components, and optoelectronics since 1979.
The SS115ALH belongs to TSC's AEC-Q101-qualified Thin SMA Schottky rectifier family, engineered specifically for high-efficiency, high-reliability DC/DC conversion in automotive and industrial environments where thermal resilience and surge immunity are critical.
FAQ
What is the maximum junction temperature rating for the SS115ALH?
The SS115ALH has a maximum junction temperature (TJ) rating of +150°C, validated per AEC-Q101 stress testing. This allows continuous operation at full 1 A load in ambient temperatures up to +105°C when mounted on a 5 mm × 5 mm Cu pad, as specified in the thermal performance section of the TSC datasheet revision B2103.
Is the SS115ALH suitable for automotive applications?
Yes, the SS115ALH is AEC-Q101 qualified and explicitly designed for automotive use. Its qualification covers temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing-making it appropriate for under-hood and infotainment power supplies where reliability at elevated temperatures is mandatory.
What is the reverse leakage current of the SS115ALH at 125°C?
The SS115ALH exhibits a maximum reverse leakage current (IR) of 1 mA at rated VRRM = 150 V and junction temperature of 125°C. This value is confirmed in the Electrical Specifications table on page 2 of the TSC datasheet (version B2103) and supports stable regulation in high-temperature, low-power standby modes.
Does the SS115ALH have halogen-free and RoHS-compliant construction?
Yes, the SS115ALH meets both RoHS Directive 2011/65/EU and IEC 61249-2-21 halogen-free requirements. The molding compound, lead finish, and internal materials are certified halogen-free, and the device carries full RoHS compliance documentation from Taiwan Semiconductor for export and environmental compliance reporting.
What is the marking code printed on the SS115ALH package?
The SS115ALH is marked with "115ALH" on the device body, as shown in the Marking Diagram on page 7 of the TSC datasheet. This 5-character code identifies the voltage rating (115 = 150 V), product series (ALH), and distinguishes it from other variants like SS110ALH (100 V) and SS120ALH (200 V).
SS115ALH 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):
- 150 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 150 V
- Capacitance @ Vr, F:
- 34pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Thin SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS115ALH FAQ
1.How can I place an order for SS115ALH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS115ALH 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 SS115ALH reliable?
The price and inventory of SS115ALH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS115ALH is usually 5 days.
3.What payment methods are accepted for SS115ALH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS115ALH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS115ALH?
SS115ALH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS115ALH 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 SS115ALH?
For technical support, including SS115ALH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS115ALH requirements.
6.How does Aetrix verify that SS115ALH is sourced from the original manufacturer or authorized distributors?
All SS115ALH 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 SS115ALH meets industry standards.
7.What is the process for return or replacement of SS115ALH?
All SS115ALH units undergo pre-shipment inspection (PSI). If there is an issue with SS115ALH, 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 SS115ALH part is unused and in its original packaging.
Return procedure for SS115ALH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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