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Taiwan Semiconductor Corporation SS26LW
- Part No.:
- SS26LW
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123W
- Datasheet:
-
SS26LW.pdf
- Description:
- DIODE SCHOTTKY 60V 2A SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:24,589
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Product details
Overview
SS26LW from Taiwan Semiconductor is a 2 A, 60 V Schottky barrier surface-mount rectifier in SOD-123W package, featuring 0.70 V forward voltage at 2 A and 25 °C, 50 A peak surge current, and junction temperature range of –55 to +150 °C; used in DC–DC converters requiring low-loss, high-efficiency rectification.
For engineers reviewing the SS26LW datasheet, SS26LW pinout, SS26LW application, or SS26LW equivalent, key selection criteria include forward voltage at rated current, repetitive peak reverse voltage, thermal resistance (RθJL = 25 °C/W), surge capability, and SOD-123W footprint compatibility with automated assembly.
Technical Context
The SS26LW implements a single-die Schottky junction optimized for low forward conduction loss and fast switching response, with guard ring structure enhancing over-voltage robustness. Its 60 V VRRM rating and 0.70 V VF at 2 A support efficient operation in mid-voltage SMPS secondary-side rectification.
Thermal performance is defined by RθJL = 25 °C/W and RθJA = 80 °C/W, enabling reliable 2 A continuous operation under standard PCB copper conditions. Moisture sensitivity level is J-STD-020 Level 1, and terminals are matte tin-plated per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 60 V - maximum non-repetitive reverse voltage the device blocks without breakdown |
| IF | 2 A - continuous average forward current rating at TA = 25 °C |
| VF | 0.70 V @ 2 A, 25 °C - forward voltage drop determining conduction loss and heat generation |
| IFSM | 50 A - peak non-repetitive surge current (8.3 ms half-sine) for transient overload handling |
| TJ max | +150 °C - maximum allowable junction temperature defining thermal derating limits |
| RθJL | 25 °C/W - junction-to-lead thermal resistance, critical for heatsinking via PCB copper pour |
| IR | 200 µA @ 60 V, 25 °C - reverse leakage current affecting standby power and voltage hold-off |
Pinout & Package
Package: SOD-123W - surface-mount plastic case with cathode band marking, 2.90 × 1.40 mm body, UL 94V-0 molding compound, and matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode | Forward current exit point | Connected to output rail; marked by visible band; carries full load current to filter capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.70 V at 2 A enables <1.4 W conduction loss, reducing thermal stress in compact DC–DC layouts |
| Guard ring protection | Integrated edge termination improves ruggedness against transient over-voltage events in unregulated supplies |
| High surge current rating | 50 A IFSM supports reliable startup and fault transients without bond-wire fusing |
| SOD-123W footprint | Standardized 2.90 × 1.40 mm outline ensures compatibility with high-speed pick-and-place and reflow profiles |
| Moisture sensitivity Level 1 | No bake requirement before assembly simplifies manufacturing flow and reduces handling risk |
Applications
| Switching Mode Power Supply (SMPS) | AC–DC Adapters |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs. IC Role / Device Role / Timing Role: Schottky rectifier replacing slower diodes to minimize switching losses and improve efficiency. Use Value: 0.70 V VF reduces conduction loss by ~30% vs. comparable 100 V Si diodes, directly improving light-load efficiency. | Use Scenario: Output rectification in wall-mounted USB-C or laptop adapters operating up to 65 W. IC Role / Device Role / Timing Role: Low-loss freewheeling path during MOSFET off-time in synchronous or quasi-resonant topologies. Use Value: SOD-123W package allows dense layout while maintaining 2 A continuous rating and 50 A surge margin for plug-in surges. |
| DC–DC Converters | Industrial Control Power Rails |
Use Scenario: Point-of-load (POL) buck converter rectification in FPGA or ASIC power delivery networks. IC Role / Device Role / Timing Role: High-frequency rectifier synchronized with PWM controller to reduce EMI and improve regulation. Use Value: Fast recovery and low capacitance (<100 pF at 4 V) minimize switching node ringing and capacitive coupling noise. | Use Scenario: Auxiliary 12 V or 24 V supply rectification in PLC I/O modules or motor drive logic rails. IC Role / Device Role / Timing Role: Robust, long-life rectifier tolerant of industrial ambient temperatures up to +85 °C ambient. Use Value: 150 °C TJ max and RθJL = 25 °C/W enable stable operation with minimal copper area on FR-4 boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS26HE (ON Semiconductor) | VF = 0.72 V @ 2 A; VRRM = 60 V; same SOD-123 package but no guard ring | Lacks integrated over-voltage protection; slightly higher conduction loss | Preferred where cost sensitivity outweighs transient robustness requirements |
| SB260 (Diotec) | VF = 0.75 V @ 2 A; VRRM = 60 V; SOD-123 package; IFSM = 40 A | Lower surge rating and higher VF limit use in high-transient environments | Suitable for fixed-input, low-surge applications where thermal margin is ample |
Compared with SS26HE and SB260, the SS26LW delivers superior surge robustness (50 A vs. 40–45 A), lower forward voltage (0.70 V vs. 0.72–0.75 V), and integrated guard ring protection-making it optimal for unregulated or line-connected DC–DC stages where reliability under voltage transients is critical.
Availability
SS26LW is available at Aetrix Electronics and suitable for switching mode power supplies, AC–DC adapters, and DC–DC converters requiring stable component supply, consistent parametric performance, and RoHS-compliant, halogen-free construction.
Supply support for SS26LW 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 SS26LW belongs to TSC's SS2xLW Schottky rectifier family, engineered specifically for high-efficiency, surface-mount secondary-side rectification in compact, thermally constrained power converters.
FAQ
What is the maximum repetitive peak reverse voltage rating for SS26LW?
The SS26LW has a maximum repetitive peak reverse voltage (VRRM) of 60 V, verified per the manufacturer's absolute maximum ratings table. This rating defines the highest reverse-biased voltage the device can block continuously without avalanche breakdown. Operating above 60 V risks irreversible junction failure. The SS26LW is not interchangeable with higher-voltage variants like SS210LW (100 V) without circuit-level validation.
What is the forward voltage of SS26LW at its rated 2 A current?
The SS26LW exhibits a typical forward voltage (VF) of 0.70 V when conducting 2 A at 25 °C junction temperature, as specified in the electrical characteristics table. This value increases with temperature and current-e.g., ~0.75 V at 125 °C. Designers must use this parameter to calculate conduction loss (PCOND = IF × VF) and verify thermal margins in their layout.
Does SS26LW have a guard ring structure, and why does it matter?
Yes, the SS26LW incorporates a guard ring for over-voltage protection, explicitly stated in the FEATURES section. This structure mitigates edge breakdown under transient voltage stress, improving reliability in circuits exposed to line surges or inductive kickback. Unlike basic Schottky diodes without guard rings (e.g., SS26HE), the SS26LW maintains stable reverse characteristics even during short-duration over-voltage events.
What is the moisture sensitivity level (MSL) of SS26LW, and how does it affect assembly?
The SS26LW is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow soldering. This simplifies manufacturing logistics and eliminates moisture-related popcorning risk during reflow. The SOD-123W package's low mass and robust molding compound contribute to this favorable rating, supporting high-yield automated assembly without special handling.
Can SS26LW be used as a direct replacement for SS24LW in an existing design?
No-SS26LW is not a direct replacement for SS24LW due to differing VRRM (60 V vs. 40 V) and forward voltage (0.70 V vs. 0.55 V). While both share the SOD-123W package and 2 A rating, substituting SS26LW into a 40 V-design may cause excessive conduction loss and thermal stress. Reverse substitution (SS24LW for SS26LW) risks reverse breakdown. Always validate voltage margin and thermal performance before interchange.
SS26LW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123W
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 60 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:
- 200 µA @ 60 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS26LW FAQ
1.How can I place an order for SS26LW through Aetrix?
Please submit a Request for Quotation (RFQ) for SS26LW 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 SS26LW reliable?
The price and inventory of SS26LW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS26LW is usually 5 days.
3.What payment methods are accepted for SS26LW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS26LW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS26LW?
SS26LW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS26LW 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 SS26LW?
For technical support, including SS26LW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS26LW requirements.
6.How does Aetrix verify that SS26LW is sourced from the original manufacturer or authorized distributors?
All SS26LW 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 SS26LW meets industry standards.
7.What is the process for return or replacement of SS26LW?
All SS26LW units undergo pre-shipment inspection (PSI). If there is an issue with SS26LW, 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 SS26LW part is unused and in its original packaging.
Return procedure for SS26LW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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