My Inquiry
My Account
Taiwan Semiconductor Corporation SK315B R5G
- Part No.:
- SK315B R5G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK315B R5G.pdf
- Description:
- DIODE SCHOTTKY 150V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,934
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SK315B R5G from Taiwan Semiconductor is a 3A, 150V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, optimized for high-efficiency switching power supplies with low forward voltage (0.95 V at 3 A, 25°C) and high surge capability (70 A IFSM). It operates up to 150°C junction temperature and features guard-ring overvoltage protection.
For engineers reviewing the SK315B R5G datasheet, SK315B R5G pinout, SK315B R5G application, or SK315B R5G equivalent, key selection criteria include its 150 V VRRM rating, 0.95 V VF at rated current, 100 µA IR at 25°C, thermal resistance (RθJA = 63°C/W), and SMB package compatibility with automated SMT assembly.
Technical Context
The SK315B R5G is a single-die Schottky rectifier designed for unidirectional DC output conversion in high-frequency switching topologies. Its low forward voltage drop minimizes conduction loss, while its 10,000 V/µs dV/dt rating supports fast-switching environments such as flyback and forward converters.
It exhibits thermally robust operation with TJ max = 150°C and RθJL = 23°C/W, enabling reliable performance under sustained load in compact layouts. Reverse leakage remains ≤100 µA at 25°C and ≤2 mA at 125°C, ensuring stable blocking behavior across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - Maximum repetitive reverse voltage the device blocks without breakdown; defines usable input voltage range in AC-DC or DC-DC stages |
| IF | 3 A - Continuous average forward current; sets maximum steady-state output capability in power supply outputs |
| VF @ 3A, 25°C | 0.95 V - Forward voltage drop at rated current; directly determines conduction loss (2.85 W at 3 A) |
| IFSM | 70 A - Non-repetitive surge current handling; enables survival during cold-start or line-transient events |
| IR @ 150V, 25°C | 100 µA - Reverse leakage current; low value preserves efficiency in high-impedance bias or hold-up circuits |
| TJ max | 150°C - Maximum junction temperature; allows operation in sealed enclosures or high-ambient industrial environments |
| RθJA | 63°C/W - Junction-to-ambient thermal resistance; informs minimum PCB copper area required for thermal management |
Pinout & Package
DO-214AA (SMB) surface-mount package: molded plastic body (UL 94V-0), matte tin-plated leads, cathode indicated by band, polarity-critical for rectification function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to transformer secondary or switch node; must withstand peak inverse voltage and surge current |
| Cathode | Output terminal for forward conduction | Delivers rectified DC to filter capacitor; polarity marking ensures correct orientation on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances edge termination reliability and improves VRRM consistency across manufacturing lots |
| Moisture sensitivity level 1 | Eliminates need for baking prior to reflow; compatible with standard J-STD-020 assembly processes |
| High dV/dt rating (10,000 V/µs) | Resists false turn-on during fast voltage transients in high-frequency SMPS designs |
| Halogen-free compound | Meets IEC 61249-2-21 requirements for environmentally compliant end-product manufacturing |
| RoHS compliant | Enables global market access without restriction under EU Directive 2011/65/EU |
Applications
| AC-DC Adapters | LED Driver Outputs |
|---|---|
Use Scenario: Secondary-side rectification in 12–24 V, 30–60 W wall adapters powering consumer electronics. IC Role / Device Role / Timing Role: Unidirectional current flow converter; replaces slower PN diodes to reduce heat and improve efficiency. Use Value: 0.95 V VF lowers conduction loss by ~35% vs. comparable 1N5822, improving adapter thermal profile and no-load power. | Use Scenario: Output rectification in constant-current LED drivers for commercial lighting fixtures. IC Role / Device Role / Timing Role: Freewheeling path for inductive current during PWM dimming cycles. Use Value: 70 A IFSM handles LED string surge currents during hot-plug or fault recovery without degradation. |
| Industrial DC-DC Converters | USB-C Power Delivery Modules |
Use Scenario: Isolated 5–15 V output stage in DIN-rail mounted 24 V input converters for PLC I/O modules. IC Role / Device Role / Timing Role: Synchronous rectifier alternative where gate drive complexity is avoided. Use Value: 150°C TJ max enables operation in enclosed cabinets with ambient temperatures up to 70°C without derating. | Use Scenario: Secondary-side rectification in compact 45 W USB-C PD chargers using active clamp flyback topology. IC Role / Device Role / Timing Role: High-speed output diode supporting >100 kHz switching frequencies. Use Value: Low RθJA (63°C/W) and SMB footprint allow thermal design within tight 30 × 30 mm board area constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay SS3H15 | Same 150 V VRRM, 3 A IF, but VF = 0.82 V (typ) at 3 A; slightly lower RθJA (55°C/W) | Higher efficiency at light loads due to lower VF; tighter VF distribution across batch | Preferred when <0.1% efficiency gain justifies higher cost and dual-source qualification effort |
| ON Semiconductor SB3150 | 150 V VRRM, 3 A IF, VF = 0.92 V (max) at 3 A; same SMB package; IR = 200 µA (max) at 25°C | Higher leakage may affect standby power in energy-sensitive designs | Suitable for cost-sensitive industrial applications where 100 µA vs. 200 µA IR is not critical |
Compared with SS3H15 and SB3150, the SK315B R5G offers balanced trade-offs: moderate VF (0.95 V), industry-leading low IR (100 µA), and guaranteed 150°C operation-making it optimal for thermally constrained, medium-power industrial adapters requiring long-term reliability.
Availability
SK315B R5G is available at Aetrix Electronics and suitable for AC-DC adapters, LED driver outputs, industrial DC-DC converters, and USB-C power delivery modules requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for SK315B 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, specializing in power rectifiers, TVS devices, and MOSFETs since 1979.
The SK3xB series-including SK315B R5G-is engineered specifically for high-efficiency, surface-mount secondary-side rectification in cost-sensitive yet thermally demanding power conversion systems.
FAQ
What is the maximum junction temperature rating for the SK315B R5G?
The SK315B R5G has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet P2212. This allows uninterrupted operation in enclosed industrial environments where ambient temperatures reach 70°C and PCB copper area is limited. The SK315B R5G maintains full electrical specifications up to this limit, unlike lower-grade variants rated only to 125°C.
Does the SK315B R5G have a halogen-free construction?
Yes, the SK315B R5G uses halogen-free molding compound compliant with IEC 61249-2-21, as explicitly stated in the "Features" section of the Taiwan Semiconductor SK32B–SK320B datasheet (P2212). This ensures compliance with environmental directives for consumer and industrial end equipment without compromising mechanical robustness or flame retardancy (UL 94V-0).
What is the forward voltage of the SK315B R5G at 3 A and 25°C?
The forward voltage (VF) of the SK315B R5G is 0.95 V maximum at IF = 3 A and TJ = 25°C, per the "ELECTRICAL SPECIFICATIONS" table in the official datasheet. This value is measured under pulsed conditions (PW = 0.3 ms) and defines worst-case conduction loss (2.85 W) for thermal design. Typical VF is lower, but system-level margining must use the max spec.
Is the SK315B R5G suitable for automated SMT placement?
Yes, the SK315B R5G is explicitly optimized for automated placement, as noted in the "FEATURES" list of the Taiwan Semiconductor datasheet. Its DO-214AA (SMB) package meets J-STD-002 solderability standards, has matte tin-plated leads, and carries moisture sensitivity level 1-eliminating pre-bake requirements and ensuring high first-pass yield in high-volume reflow lines.
What is the reverse leakage current of the SK315B R5G at 150 V and 125°C?
At VR = 150 V and TJ = 125°C, the reverse leakage current (IR) of the SK315B R5G is 2 mA maximum, per the "ELECTRICAL SPECIFICATIONS" table in the official P2212 datasheet. This value is critical for standby power budgeting in energy-efficient adapters and confirms stable blocking behavior even near thermal limits.
SK315B 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):
- 3A
- 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
SK315B R5G FAQ
1.How can I place an order for SK315B R5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK315B 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 SK315B R5G reliable?
The price and inventory of SK315B R5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK315B R5G is usually 5 days.
3.What payment methods are accepted for SK315B R5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK315B R5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK315B R5G?
SK315B R5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK315B 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 SK315B R5G?
For technical support, including SK315B R5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK315B R5G requirements.
6.How does Aetrix verify that SK315B R5G is sourced from the original manufacturer or authorized distributors?
All SK315B 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 SK315B R5G meets industry standards.
7.What is the process for return or replacement of SK315B R5G?
All SK315B R5G units undergo pre-shipment inspection (PSI). If there is an issue with SK315B 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 SK315B R5G part is unused and in its original packaging.
Return procedure for SK315B R5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SK315B R5G Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
