Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation SK310B R5G

Name: SK310B R5G
Brand: Taiwan Semiconductor Corporation
SKU: SK310B R5G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SK310B R5G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: SK310B R5G.pdf

Description:: DIODE SCHOTTKY 100V 3A DO214AA

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SK310B R5G from Taiwan Semiconductor is a 3A, 100V Schottky barrier 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), high surge current capability (70 A), and junction temperature up to +150°C. It serves as a primary output rectifier in AC/DC adapters and DC/DC converters.

For engineers reviewing the SK310B R5G datasheet, SK310B R5G pinout, SK310B R5G application, or SK310B R5G equivalent, key selection criteria include its 100 V repetitive peak reverse voltage, 0.95 V forward voltage at rated current, 100 µA max reverse leakage at 25°C, thermal resistance (R_θJL = 23°C/W), and DO-214AA mechanical compatibility with automated SMT assembly.

Technical Context

The SK310B R5G implements a single-die Schottky junction with guard ring overvoltage protection, enabling robust operation under transient voltage stress. Its 10,000 V/µs critical rate of rise of off-state voltage supports fast-switching topologies without spurious turn-on.

Designed for surface-mount use, it features matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Moisture sensitivity level is rated at Level 1 per J-STD-020 - no floor life limitation or bake requirement prior to reflow.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - maximum non-repetitive reverse blocking voltage; defines safe operating limit in flyback or forward converter secondary-side applications
I_F	3 A - continuous average forward current at T_L = 75°C; determines steady-state power delivery capacity
V_F	0.95 V max at I_F = 3 A, T_J = 25°C - directly reduces conduction loss and improves system efficiency vs. silicon diodes
I_R	100 µA max at V_R = 100 V, T_J = 25°C - low leakage preserves light-load efficiency and minimizes standby power
I_FSM	70 A - peak non-repetitive surge current (8.3 ms half-sine); withstands inrush and fault transients in SMPS outputs
T_J max	+150°C - extended junction temperature rating enables higher ambient operation or reduced heatsinking in compact designs
R_θJL	23°C/W - low junction-to-lead thermal resistance allows effective heat transfer to PCB copper, supporting high-power density layouts

Pinout & Package

Package: DO-214AA (SMB), surface-mount plastic case with cathode band marking; dimensions: 4.60 × 3.30 × 2.20 mm (L × W × H); weight ≈ 0.100 g; UL 94V-0 rated molding compound.

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 path)
Cathode	Forward current exit point	Connected to output rail; polarity marked by visible band on body - critical for correct orientation in layout

Key Features

Feature	Design Value
Guard ring structure	Enhances ruggedness against voltage transients and edge breakdown, improving reliability in unregulated or loosely clamped circuits
Low V_F (0.95 V)	Reduces conduction loss by ~40% versus comparable 100 V silicon rectifiers, directly increasing converter efficiency at full load
High I_FSM (70 A)	Supports robust startup and short-circuit tolerance without derating in 3 A-rated power rails
Moisture sensitivity Level 1	Eliminates pre-reflow baking and floor-life tracking, simplifying manufacturing logistics and reducing handling cost
Halogen-free & RoHS compliant	Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - required for commercial and industrial end-equipment compliance

Applications

AC/DC Adapters	LED Drivers
Use Scenario: 12–24 V output, 30–60 W offline flyback adapter for consumer electronics. IC Role / Device Role / Timing Role: Secondary-side synchronous rectification replacement; functions as uncontrolled output rectifier. Use Value: 0.95 V V_F lowers output conduction loss, enabling >88% efficiency at full load without active control circuitry.	Use Scenario: Constant-current LED driver for architectural or street lighting with 36 V string voltage. IC Role / Device Role / Timing Role: Output rectifier in isolated forward or LLC resonant converter stage. Use Value: 70 A I_FSM handles LED inrush during cold-start; 150°C T_J rating sustains operation in enclosed, thermally constrained fixtures.
Industrial DC/DC Converters	USB PD Power Delivery Modules
Use Scenario: 5 V/3 A or 12 V/2.5 A isolated DC/DC module for PLC I/O modules. IC Role / Device Role / Timing Role: Primary output rectifier in fixed-frequency forward converter. Use Value: DO-214AA footprint enables compact layout; 23°C/W R_θJL allows direct thermal coupling to 2 oz copper pour for passive cooling.	Use Scenario: Secondary-side rectification in 45 W USB PD 3.0 adapter with variable 5–20 V output. IC Role / Device Role / Timing Role: Fixed-voltage rectifier across multiple output taps (e.g., 9 V, 15 V, 20 V). Use Value: 100 V V_RRM safely covers worst-case reflected voltage at 20 V output with margin; 100 µA I_R maintains low standby power < 30 mW.

AC/DC Adapters

LED Drivers

Use Scenario: 12–24 V output, 30–60 W offline flyback adapter for consumer electronics.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectification replacement; functions as uncontrolled output rectifier.

Use Value: 0.95 V V_F lowers output conduction loss, enabling >88% efficiency at full load without active control circuitry.

Use Scenario: Constant-current LED driver for architectural or street lighting with 36 V string voltage.

IC Role / Device Role / Timing Role: Output rectifier in isolated forward or LLC resonant converter stage.

Use Value: 70 A I_FSM handles LED inrush during cold-start; 150°C T_J rating sustains operation in enclosed, thermally constrained fixtures.

Industrial DC/DC Converters

USB PD Power Delivery Modules

Use Scenario: 5 V/3 A or 12 V/2.5 A isolated DC/DC module for PLC I/O modules.

IC Role / Device Role / Timing Role: Primary output rectifier in fixed-frequency forward converter.

Use Value: DO-214AA footprint enables compact layout; 23°C/W R_θJL allows direct thermal coupling to 2 oz copper pour for passive cooling.

Use Scenario: Secondary-side rectification in 45 W USB PD 3.0 adapter with variable 5–20 V output.

IC Role / Device Role / Timing Role: Fixed-voltage rectifier across multiple output taps (e.g., 9 V, 15 V, 20 V).

Use Value: 100 V V_RRM safely covers worst-case reflected voltage at 20 V output with margin; 100 µA I_R maintains low standby power < 30 mW.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS310H from Diodes Inc.	Same V_RRM (100 V), slightly higher V_F (0.98 V typ), identical DO-214AA package and 3 A rating	Higher IR (200 µA @ 25°C) may impact ultra-low-power standby performance	Preferred where Diodes Inc. supply chain alignment or dual-sourcing is required
SB3100 from ON Semiconductor	Same V_RRM and I_F, but V_F = 0.85 V max (at 3 A, 25°C); R_θJA = 65°C/W vs. SK310B R5G's 63°C/W	Better conduction efficiency but slightly lower thermal margin in high-density layouts	Selected when minimizing full-load losses is prioritized over surge robustness (IFSM = 50 A only)

Compared with SS310H and SB3100, the SK310B R5G offers superior surge immunity (70 A vs. 50–60 A), tighter reverse leakage (100 µA vs. 200 µA), and a guard ring for enhanced voltage ruggedness - making it optimal for cost-sensitive, high-reliability industrial adapters and converters where transient resilience matters.

Availability

SK310B R5G is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and industrial DC/DC converters requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for SK310B 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 SK3xB series belongs to TSC's high-reliability Schottky rectifier product line, engineered specifically for efficiency-critical, high-volume power conversion applications including consumer adapters, lighting systems, and industrial power supplies.

FAQ

What is the maximum junction temperature rating for the SK310B R5G?

The SK310B R5G has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet P2212. This allows reliable operation in thermally demanding environments such as enclosed LED drivers or industrial DC/DC modules where ambient temperatures exceed 85°C. The SK310B R5G must be mounted on adequate copper area to maintain T_J ≤ 150°C under full load.

Does the SK310B R5G have a halogen-free and RoHS-compliant construction?

Yes, the SK310B R5G is both halogen-free per IEC 61249-2-21 and RoHS compliant per EU Directive 2011/65/EU, as confirmed in the "Features" section of the Taiwan Semiconductor SK32B–SK320B datasheet (P2212). The molding compound, lead finish (matte tin), and internal die attach materials meet these environmental requirements without performance trade-offs.

What is the forward voltage drop of the SK310B R5G at 3 A and 25°C?

The SK310B R5G exhibits a maximum forward voltage (V_F) of 0.95 V at I_F = 3 A and T_J = 25°C, as specified in the "ELECTRICAL SPECIFICATIONS" table of the Taiwan Semiconductor datasheet P2212. This value is measured under pulse conditions (PW = 0.3 ms) and represents the upper limit for design margining - typical units measure ~0.82 V under the same conditions.

Is the SK310B R5G suitable for automated SMT placement?

Yes, the SK310B R5G is explicitly designed for automated placement, as stated in its "FEATURES" list. Its DO-214AA (SMB) package has standardized dimensions, matte tin-plated leads compliant with J-STD-002, and moisture sensitivity Level 1 - eliminating bake requirements and ensuring compatibility with high-speed pick-and-place equipment and standard reflow profiles.

What is the repetitive peak reverse voltage (V_RRM) of the SK310B R5G?

The SK310B R5G has a repetitive peak reverse voltage (V_RRM) of 100 V, as defined in the "ABSOLUTE MAXIMUM RATINGS" table of the Taiwan Semiconductor SK32B–SK320B datasheet (P2212). This rating applies across the full operating temperature range and ensures safe blocking capability in circuits where reflected voltages or ringing peaks remain below 100 V.

SK310B 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):: 100 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 850 mV @ 3 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 100 µA @ 100 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMB)

Operating Temperature - Junction:: -55°C ~ 150°C

SK310B R5G FAQ

1.How can I place an order for SK310B R5G through Aetrix?

Please submit a Request for Quotation (RFQ) for SK310B 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 SK310B R5G reliable?

The price and inventory of SK310B R5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK310B R5G is usually 5 days.

3.What payment methods are accepted for SK310B R5G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK310B R5G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SK310B R5G?

SK310B R5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SK310B 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 SK310B R5G?

For technical support, including SK310B R5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK310B R5G requirements.

6.How does Aetrix verify that SK310B R5G is sourced from the original manufacturer or authorized distributors?

All SK310B 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 SK310B R5G meets industry standards.

7.What is the process for return or replacement of SK310B R5G?

All SK310B R5G units undergo pre-shipment inspection (PSI). If there is an issue with SK310B 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 SK310B R5G part is unused and in its original packaging.

Return procedure for SK310B R5G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

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, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…