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Taiwan Semiconductor Corporation SK115B R5G
- Part No.:
- SK115B R5G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK115B R5G.pdf
- Description:
- DIODE SCHOTTKY 150V 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,859
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Product details
Overview
SK115B R5G from Taiwan Semiconductor is a 1 A, 150 V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, featuring 0.95 V forward voltage at 1 A and 2 mA reverse leakage at 125 °C, designed for high-efficiency DC/DC converters and industrial power adapters.
For engineers reviewing the SK115B R5G datasheet, SK115B R5G pinout, SK115B R5G application, or SK115B R5G equivalent, key selection criteria include peak reverse voltage rating, thermal derating behavior, junction-to-lead thermal resistance, cathode-band polarity marking, and moisture sensitivity level 1 compliance.
Technical Context
This discrete Schottky diode uses a single-die construction optimized for low forward voltage drop and fast switching in continuous conduction mode power supplies. Its 150 V VRRM, 30 A IFSM, and 10,000 V/µs dV/dt support robust operation in flyback and boost topologies with high dv/dt transients.
The device operates across –55 °C to +150 °C junction temperature range and exhibits 25 °C/W junction-to-lead thermal resistance. Reverse leakage remains ≤2 mA at 125 °C under full rated reverse voltage, enabling stable performance in thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - maximum repetitive reverse blocking voltage without breakdown |
| IF | 1 A - average forward current rating at case temperature ≤75 °C |
| VF | 0.95 V @ 1 A, 25 °C - low conduction loss enabling >92% efficiency in 12 V output SMPS |
| IR | 100 µA @ 150 V, 25 °C - minimal standby power loss in always-on circuits |
| IFSM | 30 A - surge capability for 8.3 ms half-sine, supporting cold-start inrush handling |
| RθJL | 25 °C/W - enables direct thermal path to PCB copper for passive cooling |
| TJ max | +150 °C - extended thermal margin for sealed or high-ambient environments |
Pinout & Package
DO-214AA (SMB) surface-mount package with molded plastic body (UL 94V-0), matte tin-plated leads, cathode indicated by band, and polarity-aligned lead geometry per JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output rail or positive bus |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents edge breakdown at rated VRRM, improving reliability under voltage transients |
| Moisture sensitivity level 1 | No bake required before reflow; compatible with standard SMT assembly lines |
| Halogen-free compound | Meets IEC 61249-2-21; supports RoHS-compliant and environmentally regulated designs |
| High surge current capability | 30 A IFSM withstands repeated line surges without degradation |
| Low thermal resistance | 25 °C/W RθJL allows ≥0.5 W dissipation with ≤12.5 °C rise above PCB temperature |
Applications
| Industrial Power Adapters | DC/DC Converter Output Rectification |
|---|---|
Use Scenario: 24 V input, 5 V/2 A isolated flyback adapter for PLC I/O modules. IC Role / Device Role / Timing Role: Output rectifier replacing fast recovery diode to reduce conduction loss and improve efficiency. Use Value: 0.95 V VF cuts rectifier loss by ~35% vs. 1.3 V Si diode, lowering thermal load on heatsink-limited enclosure. | Use Scenario: 48 V–12 V non-isolated buck converter in telecom shelf power system. IC Role / Device Role / Timing Role: Synchronous rectifier freewheeling diode in critical conduction mode (CRM) operation. Use Value: 150 V VRRM provides 2× safety margin over 48 V bus transients, eliminating need for snubber networks. |
| LED Driver Secondary Side | Automotive Body Control Module Supply |
Use Scenario: Constant-current LED driver with 36 V output for commercial signage. IC Role / Device Role / Timing Role: Secondary-side rectifier in quasi-resonant forward converter. Use Value: 2 mA IR at 125 °C ensures <10 mW standby loss, meeting Energy Star Tier 2 requirements. | Use Scenario: 12 V battery-fed BCM supplying microcontroller, CAN transceiver, and sensor bias rails. IC Role / Device Role / Timing Role: Input protection and reverse-polarity blocking diode in main 12 V supply path. Use Value: Guard ring and 150 V rating prevent failure during load-dump events up to ISO 7637-2 Pulse 5a. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS115H from Diodes Inc. | Same 150 V VRRM, 1 A IF, but VF = 0.87 V @ 1 A; SMB package with different marking layout | Slightly lower conduction loss, but higher IR (200 µA @ 25 °C) may affect ultra-low-power standby | Preferred where efficiency >0.5% gain justifies tighter IR tolerance |
| SB1150 from ON Semiconductor | 150 V VRRM, 1 A IF, VF = 0.92 V @ 1 A; DO-214AA package, MSL level 1, but TJ max = +125 °C | Limited to lower ambient or forced-air-cooled designs due to 25 °C lower max junction temperature | Acceptable for cost-sensitive consumer adapters with adequate thermal margin |
Compared with SS115H and SB1150, the SK115B R5G offers the highest junction temperature rating (+150 °C) and lowest reverse leakage at elevated temperature (2 mA @ 125 °C), making it optimal for sealed industrial enclosures and automotive under-hood auxiliary supplies.
Availability
SK115B R5G is available at Aetrix Electronics and suitable for industrial power adapters, DC/DC converter output rectification, and LED driver secondary-side applications requiring stable component supply and long-term manufacturing continuity.
Supply support for SK115B R5G 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 SK1xxB series targets high-reliability, cost-optimized Schottky rectification in space-constrained AC/DC and DC/DC power stages, emphasizing thermal robustness, MSL-1 manufacturability, and wide operating temperature range.
FAQ
What is the maximum junction temperature rating for the SK115B R5G?
The SK115B R5G has a maximum junction temperature (TJ) rating of +150 °C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet revision M2212. This allows operation in sealed enclosures or high-ambient environments where thermal dissipation is limited. The SK115B R5G maintains specified electrical parameters up to this limit when derated per the forward current derating curve.
Does the SK115B R5G have a guard ring structure?
Yes, the SK115B R5G incorporates a guard ring design explicitly stated in its features list to enhance overvoltage protection and prevent edge breakdown at rated VRRM. This structural feature improves reliability during transient voltage events such as load dump or inductive switching spikes, and is confirmed in the "Features" section of the Taiwan Semiconductor SK12B–SK115B datasheet.
What is the forward voltage of the SK115B R5G at 1 A and 25 °C?
The forward voltage (VF) of the SK115B R5G is 0.95 V at 1 A and 25 °C, as specified in the Electrical Specifications table under "Forward voltage(1)" for SK115B. This value is measured using a 0.3 ms pulse test and reflects typical conduction loss under nominal operating conditions. The SK115B R5G's VF increases slightly at higher junction temperatures.
Is the SK115B R5G compliant with RoHS and halogen-free standards?
Yes, the SK115B R5G is RoHS compliant and halogen-free per IEC 61249-2-21, as documented in the "Features" section of the official Taiwan Semiconductor datasheet. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated for solderability per J-STD-002. These certifications are integral to the SK115B R5G's qualification for environmentally regulated industrial and consumer products.
What is the moisture sensitivity level (MSL) of the SK115B R5G?
The SK115B R5G has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions (<30 °C / 60% RH) without baking prior to reflow soldering. This MSL rating is confirmed in the "Features" section and simplifies SMT assembly logistics. The SK115B R5G's MSL Level 1 eliminates time-sensitive floor life constraints common in higher-level discrete packages.
SK115B R5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 150 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 150 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK115B R5G FAQ
1.How can I place an order for SK115B R5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK115B R5G 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 SK115B R5G reliable?
The price and inventory of SK115B R5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK115B R5G is usually 5 days.
3.What payment methods are accepted for SK115B R5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK115B R5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK115B R5G?
SK115B R5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK115B R5G 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 SK115B R5G?
For technical support, including SK115B R5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK115B R5G requirements.
6.How does Aetrix verify that SK115B R5G is sourced from the original manufacturer or authorized distributors?
All SK115B R5G 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 SK115B R5G meets industry standards.
7.What is the process for return or replacement of SK115B R5G?
All SK115B R5G units undergo pre-shipment inspection (PSI). If there is an issue with SK115B R5G, 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 SK115B R5G part is unused and in its original packaging.
Return procedure for SK115B R5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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