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Taiwan Semiconductor Corporation SS15
- Part No.:
- SS15
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SS15.pdf
- Description:
- DIODE SCHOTTKY 50V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,744
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Product details
Overview
SS15 from Taiwan Semiconductor is a 1A, 50V Schottky barrier surface-mount rectifier in DO-214AC (SMA) package, optimized for high-efficiency DC/DC conversion with low forward voltage (0.75 V at 1 A, 25°C), high surge capability (40 A IFSM), and junction temperature rating up to +150°C. It serves as a primary output rectifier in compact switching power supplies.
For engineers reviewing the SS15 datasheet, SS15 pinout, SS15 application, or SS15 equivalent, key selection criteria include its 50 V VRRM rating, 0.75 V forward drop at rated current, 40 A non-repetitive surge capability, thermal resistance (RθJL = 28°C/W), and DO-214AC mechanical compatibility with automated SMT assembly lines.
Technical Context
The SS15 operates as a single-die, unidirectional Schottky rectifier with cathode-band polarity marking and no internal guard ring required for its 50 V rating-unlike higher-voltage variants (e.g., SS19–SS115) which specify guard ring explicitly. Its junction-to-lead thermal resistance of 28°C/W enables direct PCB copper pad heat sinking under continuous 1 A load.
Electrical behavior is defined by two critical operating points: VF = 0.75 V max at IF = 1 A, TJ = 25°C and VF = 0.65 V max at IF = 1 A, TJ = 100°C; reverse leakage is limited to 200 µA max at VR = 50 V, TJ = 25°C and 5 mA max at TJ = 100°C-enabling stable operation in thermally constrained adapters and monitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse voltage; sets upper limit for DC bus or output rail voltage in SMPS designs |
| IF | 1 A continuous - defines steady-state conduction capacity without derating below 125°C ambient |
| IFSM | 40 A - peak surge current handling for startup or transient overload without bond-wire failure |
| VF @ 1 A, 25°C | 0.75 V max - directly reduces conduction loss and improves efficiency in 5–12 V output stages |
| IR @ 50 V, 25°C | 200 µA max - ensures minimal standby power loss in always-on adapter applications |
| TJ max | +150°C - allows operation in sealed enclosures or high-ambient industrial environments |
| RθJL | 28°C/W - enables thermal design using only lead-frame conduction; no heatsink needed for ≤1 A at <60°C ambient |
Pinout & Package
Package: DO-214AC (SMA), surface-mount plastic case with matte tin-plated leads, J-STD-002 solderable, moisture sensitivity level 1, UL 94V-0 rated molding compound, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to transformer secondary or switch node; must withstand full IFSM during turn-on transients |
| Cathode | Output current exit point | Connected to output filter capacitor; polarity marking ensures correct orientation on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.75 V max at 1 A, 25°C - cuts conduction loss by ~30% vs. comparable silicon diodes in 5–12 V outputs |
| High surge current capability | 40 A IFSM - sustains repeated inrush events in AC/DC adapters without degradation |
| Moisture sensitivity level 1 | No bake requirement before reflow - simplifies manufacturing and reduces process cost |
| RoHS & halogen-free | Complies with IPC-1752A material declaration requirements for global OEM shipments |
| Junction temperature range | –55°C to +150°C - supports operation in automotive cabin or industrial control cabinets |
Applications
| Switching Mode Power Supply (SMPS) | AC/DC Adapter |
|---|---|
Use Scenario: Primary-side synchronous rectification in 5–12 V, 5–20 W offline flyback converters. IC Role / Device Role / Timing Role: Output rectifier replacing conventional PN diodes to reduce conduction loss and improve light-load efficiency. Use Value: Enables >88% efficiency at 25% load due to 0.75 V VF and low IR, meeting DOE VI and CoC Tier 2 standards. | Use Scenario: Secondary-side rectification in wall-plug adapters for consumer electronics. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC to USB-powered devices. Use Value: Stable 1 A output with <200 µA leakage at 50 V reverse bias ensures low no-load power draw (<30 mW). |
| Monitor Power Board | TV Backlight Supply |
Use Scenario: Auxiliary 5 V/3.3 V rail generation in LCD monitor mainboard power sections. IC Role / Device Role / Timing Role: Rectifier in isolated buck-derived auxiliary supply feeding logic and display interface ICs. Use Value: +150°C TJ rating permits placement near heat-generating DC/DC inductors without thermal derating. | Use Scenario: LED string current path in local dimming backlight drivers for mid-size TVs. IC Role / Device Role / Timing Role: Freewheeling path during PWM-controlled boost stage commutation. Use Value: 40 A IFSM handles 10× peak LED current surges during fast PWM transitions without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR150 (ON Semiconductor) | Same DO-214AC package, but 50 V VRRM and 1 A IF; VF = 0.82 V max at 1 A - 9% higher conduction loss | Higher VF increases thermal stress in space-constrained adapters; requires larger copper area for same TJ | Select when legacy qualification or second-source validation already exists for MBR150 in production |
| SB150 (Vishay) | DO-214AC, 50 V, 1 A; VF = 0.72 V typ at 1 A, 25°C - slightly lower than SS15's 0.75 V max, but IR = 500 µA max at 50 V | Higher leakage may raise no-load power in energy-sensitive IoT adapters; acceptable in TV/monitor where standby is less critical | Prefer for applications prioritizing ultra-low VF over leakage, provided IR margin is verified in final design |
Compared with MBR150 and SB150, the SS15 delivers a balanced trade-off: lower VF than MBR150 for better efficiency, and lower IR than SB150 for tighter standby compliance-making it optimal for new-design adapters and SMPS targeting both efficiency and no-load performance.
Availability
SS15 is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and monitor power boards requiring stable component supply across high-volume production cycles.
Supply support for SS15 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 rectifiers, TVS diodes, and MOSFETs since 1979.
The SS15 belongs to TSC's SS1x Schottky rectifier family, engineered specifically for cost-sensitive, high-efficiency secondary-side rectification in consumer and industrial power supplies where thermal robustness and SMT manufacturability are critical.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for SS15?
The SS15 has a VRRM rating of 50 V, meaning it can safely block up to 50 V of reverse voltage repeatedly without breakdown. This value is confirmed in the Absolute Maximum Ratings table of the R2305 datasheet revision and applies strictly to the SS15 variant-not the entire SS1x series. Exceeding this voltage risks irreversible avalanche failure.
What is the forward voltage (VF) of SS15 at 1 A and 25°C?
The SS15 exhibits a maximum forward voltage of 0.75 V at 1 A and 25°C, per the Electrical Specifications table. This is measured under pulsed conditions (PW = 0.3 ms) and represents the worst-case conduction loss for thermal design. At 100°C junction temperature, VF drops to 0.65 V max, reflecting the negative temperature coefficient typical of Schottky diodes.
Is SS15 RoHS compliant and halogen-free?
Yes, the SS15 is RoHS compliant and halogen-free, as explicitly stated in the FEATURES section of the R2305 datasheet. These attributes are verified per JEDEC J-STD-609 and meet IPC-1752A reporting requirements, enabling use in EU, Japan, and North American markets without material declaration exceptions.
What package does SS15 use, and is it compatible with standard SMA footprints?
The SS15 uses the DO-214AC (SMA) package, with mechanical dimensions matching JEDEC DO-214AC Issue D. Its outline-including 4.60 mm body length, 2.83 mm width, and 2.30 mm height-is identical to industry-standard SMA footprints, ensuring full compatibility with existing stencil apertures and pick-and-place tooling calibrated for SMA components.
What is the peak forward surge current (IFSM) rating for SS15?
The SS15 is rated for a peak forward surge current (IFSM) of 40 A, tested per 8.3 ms single half-sine wave per JESD22-A112. This rating applies at TA = 25°C and assumes no prior heating; real-world surge capability decreases with rising junction temperature, so thermal design must ensure TJ remains ≤125°C during repeated surges.
SS15 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 750 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS15 FAQ
1.How can I place an order for SS15 through Aetrix?
Please submit a Request for Quotation (RFQ) for SS15 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 SS15 reliable?
The price and inventory of SS15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS15 is usually 5 days.
3.What payment methods are accepted for SS15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS15?
SS15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS15 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 SS15?
For technical support, including SS15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS15 requirements.
6.How does Aetrix verify that SS15 is sourced from the original manufacturer or authorized distributors?
All SS15 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 SS15 meets industry standards.
7.What is the process for return or replacement of SS15?
All SS15 units undergo pre-shipment inspection (PSI). If there is an issue with SS15, 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 SS15 part is unused and in its original packaging.
Return procedure for SS15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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