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Taiwan Semiconductor Corporation SKL13B
- Part No.:
- SKL13B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SKL13B.pdf
- Description:
- DIODE SCHOTTKY 30V 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,203
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Product details
Overview
SKL13B from Taiwan Semiconductor is a 1 A, 30 V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring low forward voltage (0.39 V max at 1 A), high surge capability (50 A IFSM), and junction temperature range of –55°C to +125°C - deployed in SMPS input rectification stages for compact AC/DC adapters.
For engineers reviewing the SKL13B datasheet, SKL13B pinout, SKL13B application, or SKL13B equivalent, key selection criteria include repetitive peak reverse voltage (30 V), thermal resistance (RθJA = 85°C/W), moisture sensitivity level (MSL 1), RoHS/halogen-free compliance, and cathode-band polarity marking.
Technical Context
The SKL13B is a single-die Schottky rectifier optimized for high-frequency switching applications where low conduction loss and fast recovery are critical. Its 0.39 V maximum forward voltage at 1 A reduces power dissipation, while its 50 A non-repetitive surge rating supports transient load conditions in adapter front-end rectification.
Thermally, it uses a DO-214AA (SMB) package with RθJL = 30°C/W and RθJA = 85°C/W, enabling reliable operation up to +125°C junction temperature. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards for industrial-grade assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse blocking voltage; sets upper limit for DC bus or rectified AC input voltage |
| IF | 1 A continuous - Rated average forward current; defines steady-state power delivery capacity |
| IFSM | 50 A (8.3 ms sine) - Peak surge withstand capability; ensures reliability during cold-start or line transients |
| VF | ≤ 0.39 V @ 1 A, 25°C - Low conduction loss improves efficiency in high-duty-cycle SMPS designs |
| TJ max | +125°C - Maximum operating junction temperature; enables use in thermally constrained enclosures |
| RθJA | 85°C/W - Thermal resistance from junction to ambient; informs heatsinking requirements on standard FR-4 PCB |
| MSL | Level 1 (per J-STD-020) - No floor life limitation; compatible with standard SMT reflow without dry-pack handling |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode-indicating band; two-terminal device (anode and cathode) in axial leaded outline. Matte tin-plated leads meet J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC input or transformer secondary; must withstand reverse-biased cathode voltage |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to output capacitor or ground return path; carries full load current |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances voltage standoff margin and prevents edge breakdown under transient overvoltage |
| Low VF (0.39 V max) | Reduces conduction loss by ~30% vs. comparable silicon diodes, improving adapter efficiency >85% |
| High IFSM (50 A) | Withstands inrush currents during plug-in events without degradation in 60 Hz line-synchronized designs |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally regulated end equipment |
| MSL Level 1 | Eliminates bake-out or humidity-controlled storage; supports just-in-time SMT line integration |
Applications
| AC/DC Adapters | Monitor Power Supplies |
|---|---|
Use Scenario: Compact wall-wart and desktop adapters converting 90–264 VAC to 5–19 VDC outputs. IC Role / Device Role / Timing Role: Input bridge or output synchronous rectifier replacement in flyback or LLC topologies. Use Value: Low VF minimizes heat rise in sealed plastic housings; SMB footprint saves board space vs. DO-41. | Use Scenario: Internal auxiliary and main power rails in LCD/LED monitors with tight thermal budgets. IC Role / Device Role / Timing Role: Secondary-side rectification in multi-output forward converters delivering +5 V, +12 V, and –5 V rails. Use Value: 125°C TJ rating sustains performance near display backlight drivers; MSL 1 simplifies manufacturing. |
| TV Power Sections | SMPS Front-End Rectification |
Use Scenario: Standby and main power conversion in smart TVs with dynamic load profiles and EMI constraints. IC Role / Device Role / Timing Role: High-efficiency output rectifier in resonant half-bridge or active-clamp forward circuits. Use Value: 50 A IFSM handles burst-mode transitions; halogen-free compound meets global TV safety certifications. | Use Scenario: Primary-side AC input rectification in universal-input offline SMPS for industrial controllers. IC Role / Device Role / Timing Role: Fast-recovery, low-loss alternative to standard PN diodes in bridge configurations. Use Value: 85°C/W RθJA allows direct mounting on copper pour without thermal vias in cost-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS13 (ON Semiconductor) | Same 1 A / 30 V rating, but VF = 0.45 V max; RθJA = 90°C/W; MSL Level 1 confirmed | Slightly higher conduction loss; suitable where thermal margin exceeds 5°C | Prefer SKL13B when <0.4 V VF is required for >87% efficiency targets |
| SB130 (Vishay) | 1 A / 30 V, VF = 0.42 V max; DO-214AA package; IFSM = 40 A; RoHS compliant | Lower surge rating limits use in high-inrush adapter designs | Select SKL13B for applications demanding ≥50 A surge immunity per JEDEC 47 |
Compared with SS13 and SB130, the SKL13B delivers the lowest forward voltage (0.39 V) and highest surge rating (50 A) in the 1 A / 30 V SMB-class Schottky segment, making it optimal for thermally constrained, high-reliability adapter and monitor power supplies.
Availability
SKL13B is available at Aetrix Electronics and suitable for AC/DC adapters, monitor power supplies, TV auxiliary rails, and SMPS front-end rectification requiring stable component supply, consistent MSL-1 handling, and halogen-free compliance.
Supply support for SKL13B 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, automotive, and industrial markets since 1979.
The SKL13B belongs to TSC's SMB-packaged Schottky rectifier product line, engineered specifically for high-efficiency, low-profile AC/DC conversion in consumer and computing power supplies.
FAQ
What is the maximum junction temperature rating for the SKL13B?
The SKL13B has a specified maximum junction temperature (TJ) of +125°C, with an operational range from –55°C to +125°C. This rating enables reliable deployment in enclosed power adapters and monitor internal supplies where ambient temperatures may exceed 70°C. The SKL13B's thermal design - including RθJA = 85°C/W - must be validated against actual PCB layout and airflow to ensure the SKL13B stays within this limit under full-load conditions.
Does the SKL13B have a cathode band marking, and how is polarity identified?
Yes, the SKL13B uses a visible cathode band on the body to indicate polarity, consistent with DO-214AA (SMB) industry convention. The banded end is the cathode terminal, and the unmarked end is the anode. This marking is laser-etched or molded into the epoxy case and remains legible after reflow soldering. Correct orientation is essential - reverse installation of the SKL13B will cause immediate short-circuit failure in forward-biased applications.
Is the SKL13B suitable for use in RoHS-compliant and halogen-free designs?
Yes, the SKL13B is both RoHS compliant (EU Directive 2011/65/EU) and halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. These attributes make the SKL13B acceptable for export to EU, Japan, and South Korea, and align with OEM sustainability requirements for consumer electronics where the SKL13B is commonly used.
What is the surge current rating of the SKL13B, and under what test condition is it specified?
The SKL13B is rated for a non-repetitive peak forward surge current (IFSM) of 50 A, tested using an 8.3 ms single half-sine wave superimposed on rated load, per JEDEC JESD201. This rating reflects real-world line surges and inrush events in AC/DC adapters. Engineers must verify that system-level fusing and upstream impedance limit fault energy to prevent permanent damage to the SKL13B during such events.
What packaging and reel quantity is offered for the SKL13B?
The SKL13B is supplied in DO-214AA (SMB) package on 3,000-unit tape-and-reel format, compatible with standard pick-and-place equipment. The reel complies with EIA-481-D standards, and the device is MSL Level 1 - meaning no dry-pack or baking is required prior to SMT assembly. This packaging supports high-volume automated manufacturing of power supplies where the SKL13B serves as a primary rectifier.
SKL13B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 390 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 30 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SKL13B FAQ
1.How can I place an order for SKL13B through Aetrix?
Please submit a Request for Quotation (RFQ) for SKL13B 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 SKL13B reliable?
The price and inventory of SKL13B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SKL13B is usually 5 days.
3.What payment methods are accepted for SKL13B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SKL13B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SKL13B?
SKL13B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SKL13B 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 SKL13B?
For technical support, including SKL13B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SKL13B requirements.
6.How does Aetrix verify that SKL13B is sourced from the original manufacturer or authorized distributors?
All SKL13B 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 SKL13B meets industry standards.
7.What is the process for return or replacement of SKL13B?
All SKL13B units undergo pre-shipment inspection (PSI). If there is an issue with SKL13B, 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 SKL13B part is unused and in its original packaging.
Return procedure for SKL13B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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