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Taiwan Semiconductor Corporation SS14LS
- Part No.:
- SS14LS
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123H
- Datasheet:
-
SS14LS.pdf
- Description:
- DIODE SCHOTTKY 40V 1A SOD123HE
- Quantity:
- Payment:
- Shipping:
Inventory:51,108
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Product details
Overview
SS14LS from Taiwan Semiconductor is a 1A, 40V Schottky barrier surface-mount rectifier in SOD-123HE package, featuring 0.55V forward voltage at 1.0A/25°C, 62pF junction capacitance, 30A peak surge current, and 125°C maximum junction temperature. It serves as a low-loss freewheeling or output rectifier in compact DC-DC converters.
For engineers reviewing the SS14LS datasheet, SS14LS pinout, SS14LS application, or SS14LS equivalent, key selection criteria include its 40V VRRM, low-profile <0.85mm height, moisture sensitivity level 1 rating, RoHS/halogen-free compliance, and suitability for high-efficiency, space-constrained power stages.
Technical Context
The SS14LS operates as a single-die, unidirectional Schottky rectifier with cathode-band polarity indication. Its low forward voltage drop minimizes conduction loss, while its 62pF junction capacitance supports high-frequency switching up to several hundred kHz without excessive capacitive loading.
Thermally, it delivers RθJA = 70°C/W and RθJC = 25°C/W, enabling reliable operation at 1A continuous current within ambient temperatures up to 85°C when mounted on standard PCB copper. The SOD-123HE package meets UL 94V-0 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum reverse blocking voltage; sets upper limit for output or flyback voltage rails |
| VF @ 1.0A, 25°C | 0.55 V - Directly reduces conduction loss and heat generation in 1A power paths |
| IFSM | 30 A - Withstands short-duration inrush or fault currents without failure |
| CJ | 62 pF - Limits high-frequency displacement current and EMI in fast-switching topologies |
| TJ max | 125 °C - Defines thermal derating boundary for sustained 1A operation in enclosed environments |
| Package | SOD-123HE - 1.95 × 1.25 mm footprint with <0.85 mm profile, optimized for automated placement |
| MSL | Level 1 (per J-STD-020) - No bake required before reflow; supports standard SMT assembly flow |
Pinout & Package
SOD-123HE is a two-terminal surface-mount package with cathode indicated by a band on the body. Terminals are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to higher-potential node (e.g., switch node or input rail) |
| Cathode | Output current exit point | Marked with band; connects to load or output capacitor; defines polarity of rectification |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.55 V @ 1A enables >92% efficiency in 5–12V DC-DC outputs at full load |
| High surge capability | 30A IFSM supports robust startup and transient handling in adapter and SMPS designs |
| Ultra-low profile | <0.85 mm height allows use in ultra-thin power modules and portable electronics |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS; suitable for green manufacturing programs |
| Moisture-safe packaging | MSL Level 1 eliminates pre-bake steps, reducing SMT line downtime and cost |
Applications
| USB-C PD Adapters | Industrial DC-DC Modules |
|---|---|
Use Scenario: Secondary-side synchronous rectification replacement in 20–65W USB-C power adapters. IC Role / Device Role / Timing Role: Discrete Schottky rectifier providing unidirectional current flow from transformer secondary to output filter. Use Value: 0.55V VF reduces conduction loss by ~18% vs. comparable 45V Schottkys, improving thermal margin at 1A output. | Use Scenario: Output rectification in isolated 12V/1A industrial DC-DC converters operating at 250kHz. IC Role / Device Role / Timing Role: Freewheeling diode clamping in flyback or forward converter secondary stage. Use Value: 62pF CJ limits capacitive switching loss and EMI generation during 250kHz transitions. |
| LED Driver Power Supplies | Automotive Body Control Modules |
Use Scenario: Input rectification in constant-current LED drivers powering streetlight or signage arrays. IC Role / Device Role / Timing Role: AC-to-DC bridge leg component converting 24VAC or rectified 36VDC input to stable DC bus. Use Value: 125°C TJ max ensures reliability under sealed-housing thermal conditions up to 85°C ambient. | Use Scenario: Reverse-polarity protection and load dump suppression in 12V automotive sub-systems. IC Role / Device Role / Timing Role: Low-loss series rectifier isolating battery feed from downstream microcontrollers and sensors. Use Value: MSL Level 1 and JESD201 Class 2 whisker resistance ensure long-term solder joint integrity in vibration-prone environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semi SS14-E3/5AT | VF = 0.55V @ 1A (same), but VRRM = 40V and package is SOD-123 (not HE variant); RθJA = 75°C/W | Slightly higher thermal resistance; less suited for ultra-thin layouts due to taller profile (~1.1mm) | Preferred where legacy SOD-123 footprint compatibility is required over height constraint |
| Vishay SS14HM3/5BT | VF = 0.52V @ 1A, VRRM = 40V, SOD-123HE package, but MSL Level 2a (requires bake if exposed >1 year) | Lower VF improves efficiency marginally, but moisture sensitivity adds process overhead | Selected when absolute lowest conduction loss is prioritized and bake infrastructure exists |
Compared with SS14LS, SS14-E3/5AT offers identical electrical specs but lacks the ultra-low profile and MSL Level 1 advantage, while SS14HM3/5BT trades 0.03V lower VF for added moisture handling complexity-making SS14LS optimal for high-volume, height-sensitive, no-bake production.
Availability
SS14LS is available at Aetrix Electronics and suitable for USB-C PD adapters, industrial DC-DC modules, and LED driver power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for SS14LS 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 power and signal conditioning markets since 1979.
The SS1xLS family targets cost-sensitive, high-volume power conversion applications where low VF, compact size, and process-ready packaging are critical-especially in consumer adapters, industrial PSUs, and automotive auxiliary supplies.
FAQ
What is the maximum repetitive peak reverse voltage rating for SS14LS?
The SS14LS has a maximum repetitive peak reverse voltage (VRRM) of 40 V, as specified in the Absolute Maximum Ratings table. This value defines the highest reverse-biased voltage the device can block continuously without breakdown. Exceeding 40 V risks irreversible avalanche failure. The SS14LS is therefore suited for 24V–36V nominal output rails where safety margins keep peak transients below this threshold.
Does SS14LS require moisture preconditioning before reflow soldering?
No, SS14LS does not require moisture preconditioning before reflow soldering. It is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH without baking. This eliminates pre-reflow bake cycles, reduces SMT line downtime, and avoids thermal stress on the die or mold compound-making SS14LS ideal for high-throughput, lead-free reflow processes.
What is the forward voltage of SS14LS at 1.0A and 125°C junction temperature?
The SS14LS forward voltage at 1.0A and 125°C junction temperature is not explicitly published in the datasheet. However, based on typical Schottky behavior and the 0.55V spec at 25°C, VF increases approximately +1.2 mV/°C, yielding ~0.67V at 125°C. For precise thermal design, engineers should consult the Fig.6 Typical Forward Characteristics curve in the SS14LS datasheet, which plots VF across temperature and current.
Can SS14LS replace SS16LS in a 60V-rated circuit?
No, SS14LS cannot replace SS16LS in a 60V-rated circuit. SS14LS has a VRRM of 40 V, while SS16LS is rated for 60 V. Using SS14LS in a 60V application risks reverse-bias breakdown during transients or ripple peaks. The SS14LS is only suitable where maximum reverse voltage remains ≤40 V. For 60V systems, SS16LS-or another 60V+ Schottky-is required to maintain reliability and safety margin.
Is SS14LS halogen-free and RoHS compliant?
Yes, SS14LS is both halogen-free and RoHS compliant. Per the manufacturer's documentation, it conforms to IEC 61249-2-21 for halogen content and meets EU Directive 2011/65/EU (RoHS 2) for restricted substances. These certifications are verified through material declarations and third-party testing, supporting environmental compliance in consumer, industrial, and medical-adjacent end equipment.
SS14LS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123H
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 400 µA @ 40 V
- Capacitance @ Vr, F:
- 80pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123HE
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS14LS FAQ
1.How can I place an order for SS14LS through Aetrix?
Please submit a Request for Quotation (RFQ) for SS14LS 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 SS14LS reliable?
The price and inventory of SS14LS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS14LS is usually 5 days.
3.What payment methods are accepted for SS14LS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS14LS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS14LS?
SS14LS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS14LS 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 SS14LS?
For technical support, including SS14LS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS14LS requirements.
6.How does Aetrix verify that SS14LS is sourced from the original manufacturer or authorized distributors?
All SS14LS 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 SS14LS meets industry standards.
7.What is the process for return or replacement of SS14LS?
All SS14LS units undergo pre-shipment inspection (PSI). If there is an issue with SS14LS, 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 SS14LS part is unused and in its original packaging.
Return procedure for SS14LS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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