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Taiwan Semiconductor Corporation SS25L
- Part No.:
- SS25L
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SS25L.pdf
- Description:
- 2A, 50V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:4,743
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Product details
Overview
SS25L from Taiwan Semiconductor is a 2 A, 50 V Schottky barrier surface-mount rectifier in Sub SMA package, featuring 0.70 V forward voltage at 2 A and 10 mA reverse current at 100°C, optimized for high-efficiency DC-DC converters and switching power supplies.
For engineers reviewing the SS25L datasheet, SS25L pinout, SS25L application, or SS25L equivalent, key selection criteria include its 50 V repetitive peak reverse voltage, 50 A surge rating, 17 °C/W junction-to-lead thermal resistance, and compatibility with automated SMT assembly per J-STD-002.
Technical Context
The SS25L employs a single-die Schottky structure with guard ring overvoltage protection and matte tin-plated leads meeting JESD 201 Class 2 whisker requirements. Its 125°C maximum junction temperature and level-1 moisture sensitivity support reflow-compatible manufacturing.
Designed for low-loss unidirectional conduction, the SS25L delivers 0.70 V forward drop at rated 2 A load and maintains ≤10 mA reverse leakage up to 100°C - enabling stable operation in thermally constrained SMPS secondary-side rectification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum non-repetitive reverse blocking capability without breakdown |
| IF | 2 A - Continuous average forward current rating at TL = 75°C |
| IFSM | 50 A - Peak surge current tolerance for 8.3 ms half-sine waveform |
| VF @ 2 A, 25°C | 0.70 V - Low conduction loss enabling >90% efficiency in 5–12 V output DC-DC stages |
| IR @ 50 V, 100°C | 10 mA - Controlled leakage ensures minimal standby power loss in high-temp environments |
| RθJL | 17 °C/W - Enables direct thermal coupling to PCB copper for passive heatsinking |
| Package | Sub SMA - Compact 2.7 × 4.2 mm outline compatible with standard SMA land patterns |
Pinout & Package
Sub SMA package: 2-terminal surface-mount device with cathode band marking; lead finish is matte tin, solderable per J-STD-002; polarity indicated by visible cathode band on molded body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., transformer secondary center-tap or ground return) |
| Cathode | Forward current exit / reverse-blocking terminal | Connected to output rail; cathode band identifies this terminal visually and on PCB silkscreen |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents edge breakdown under transient overvoltage, improving reliability in flyback snubber circuits |
| Level-1 moisture sensitivity | Eliminates bake requirement prior to reflow, reducing production cycle time and cost |
| UL 94V-0 molding compound | Meets flame-retardancy requirements for enclosed power adapters and industrial enclosures |
| JESD 201 Class 2 whisker resistance | Ensures long-term solder joint integrity in automotive and telecom applications with thermal cycling |
Applications
| Server VRM Output Rectification | Laptop Adapter Secondary Side |
|---|---|
Use Scenario: High-frequency synchronous rectification replacement in 12 V → 1.2 V server voltage regulator modules. IC Role / Device Role / Timing Role: Discrete Schottky rectifier providing unidirectional current path with minimal conduction loss. Use Value: 0.70 V VF reduces power dissipation by ~15% vs. comparable 60 V parts, lowering thermal load on compact VRM PCBs. | Use Scenario: Secondary-side rectification in 19 V input, 5–20 V output USB-C PD adapters. IC Role / Device Role / Timing Role: Main output rectifier handling continuous 2 A load with intermittent 50 A surge during startup. Use Value: 50 A IFSM withstands inrush surges from large output capacitors without degradation. |
| Industrial DC-DC Converter | LED Driver Power Stage |
Use Scenario: Isolated 24 V input to 5/12 V dual-output converter in programmable logic controllers. IC Role / Device Role / Timing Role: Primary output rectifier operating continuously at 85°C ambient with 100% duty cycle. Use Value: 10 mA IR at 100°C prevents thermal runaway and maintains regulation stability under full-load thermal stress. | Use Scenario: Constant-current LED string supply with PWM dimming and 50 kHz switching frequency. IC Role / Device Role / Timing Role: Freewheeling diode in buck-derived LED driver topology. Use Value: 17 °C/W RθJL allows direct thermal transfer to metal-core PCB, eliminating need for external heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS25A (ON Semiconductor) | Same 50 V VRRM, 2 A IF, but VF = 0.55 V @ 2 A; Sub SMA package with identical footprint | Lower forward drop improves efficiency in battery-powered systems with tight thermal budgets | Select SS25A when <0.6 V VF is required; verify layout compatibility via mechanical drawing revision |
| SB250 (Vishay) | 50 V VRRM, 2 A IF, VF = 0.72 V @ 2 A; SMA package (slightly larger than Sub SMA), 75 °C/W RθJA | Higher thermal resistance requires additional copper pour or airflow; suitable for lower-power adapters | Choose SB250 only if existing SMA land pattern must be reused; derate IF to 1.6 A at 75°C ambient |
Compared with SS25A and SB250, the SS25L offers balanced trade-offs: higher VF than SS25A but tighter thermal performance than SB250, making it optimal for space-constrained 2 A SMPS where Sub SMA footprint and 17 °C/W RθJL are critical.
Availability
SS25L is available at Aetrix Electronics and suitable for switching mode power supplies, DC-DC converters, and AC-DC adapters requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for SS25L 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 management and industrial markets since 1979.
The SS25L belongs to TSC's SS2xL Schottky rectifier family, engineered specifically for high-efficiency, surface-mount secondary-side rectification in compact, high-density power conversion systems.
FAQ
What is the maximum junction temperature rating for the SS25L?
The SS25L has a maximum junction temperature (TJ) of +125°C, as specified in the Absolute Maximum Ratings table. This rating applies under steady-state conditions with proper thermal management using the Sub SMA package's 17 °C/W junction-to-lead thermal resistance. Operation beyond 125°C risks irreversible degradation of the Schottky junction. The SS25L datasheet confirms this limit across all SS2xL variants including SS25L.
Does the SS25L have a halogen-free construction?
Yes, the SS25L is halogen-free in accordance with IEC 61249-2-21, as explicitly stated in the FEATURES section of the official Taiwan Semiconductor datasheet. The molding compound contains no bromine, chlorine, or other regulated halogens, supporting compliance with environmental directives for consumer and industrial electronics. This specification applies directly to the SS25L and all SS2xL series devices.
What is the reverse leakage current of the SS25L at 50 V and 100°C?
The SS25L exhibits a maximum reverse leakage current (IR) of 10 mA at 50 V reverse voltage and 100°C junction temperature, per the ELECTRICAL SPECIFICATIONS table. This value is confirmed for SS25L and SS26L in the "SS25L SS26L" column under the IR row. It reflects worst-case behavior under sustained thermal stress and is critical for standby power budgeting in energy-efficient designs using SS25L.
Is the SS25L compatible with lead-free reflow soldering profiles?
Yes, the SS25L supports lead-free reflow soldering per J-STD-002, enabled by its matte tin-plated leads and level-1 moisture sensitivity rating. The Sub SMA package withstands peak temperatures up to 260°C for 10 seconds without delamination or parametric shift. Taiwan Semiconductor's documentation confirms SS25L's qualification for standard Pb-free reflow, making it suitable for modern SMT lines processing SS25L.
How does the SS25L's forward voltage compare to the SS24L and SS26L?
The SS25L has a typical forward voltage (VF) of 0.70 V at 2 A and 25°C, matching the SS26L and differing from the SS24L (0.50 V). This reflects the trade-off between higher reverse voltage rating (50 V for SS25L vs. 40 V for SS24L) and increased barrier height. All three share identical Sub SMA packaging and thermal specs, but SS25L's VF is confirmed in the datasheet's "SS25L SS26L" column - a key differentiator when selecting among SS2xL variants like SS25L.
SS25L 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):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 400 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
- Operating Temperature - Junction:
- -55°C ~ 125°C
SS25L FAQ
1.How can I place an order for SS25L through Aetrix?
Please submit a Request for Quotation (RFQ) for SS25L 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 SS25L reliable?
The price and inventory of SS25L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS25L is usually 5 days.
3.What payment methods are accepted for SS25L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS25L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS25L?
SS25L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS25L 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 SS25L?
For technical support, including SS25L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS25L requirements.
6.How does Aetrix verify that SS25L is sourced from the original manufacturer or authorized distributors?
All SS25L 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 SS25L meets industry standards.
7.What is the process for return or replacement of SS25L?
All SS25L units undergo pre-shipment inspection (PSI). If there is an issue with SS25L, 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 SS25L part is unused and in its original packaging.
Return procedure for SS25L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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