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

Taiwan Semiconductor Corporation SK310BHR5G

Name: SK310BHR5G
Brand: Taiwan Semiconductor Corporation
SKU: SK310BHR5G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SK310BHR5G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: SK310BHR5G.pdf

Description:: DIODE SCHOTTKY 100V 3A DO214AA

Quantity:: RFQ Add To RFQ list

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Inventory:8,686

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Product details

Overview

SK310BHR5G from Taiwan Semiconductor is a 100 V, 3 A Schottky barrier rectifier in DO-214AA (SMB) package, featuring low forward voltage (0.95 V at 3 A, 25°C), high surge current capability (70 A), and AEC-Q101 qualification for automotive-grade reliability. It serves as a freewheeling or reverse-battery protection diode in DC/DC converters and car lighting systems.

For engineers reviewing the SK310BHR5G datasheet, SK310BHR5G pinout, SK310BHR5G application, or SK310BHR5G equivalent, key selection criteria include its 100 V repetitive peak reverse voltage, 0.95 V forward drop at rated current, 70 A IFSM rating, junction temperature range up to +150°C, and DO-214AA mechanical compatibility with automated SMT assembly.

Technical Context

This discrete Schottky diode uses a single-die construction optimized for low-loss operation in high-frequency switching applications. Its guard ring structure provides overvoltage protection, and the matte tin-plated leads meet J-STD-002 solderability requirements.

The device operates across a junction temperature range of –55°C to +150°C, with thermal resistance R_θJL = 23°C/W and R_θJA = 63°C/W. Reverse leakage is specified at ≤100 µA at 25°C and ≤2 mA at 125°C under rated V_RRM.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum non-repetitive reverse blocking voltage; defines safe operating limit in reverse-biased conditions
I_F	3 A - Continuous forward current rating; determines steady-state power dissipation and heatsink sizing
I_FSM	70 A - Peak surge current (8.3 ms half-sine); supports transient load dump and inductive kick handling
V_F	0.95 V max @ 3 A, 25°C - Low conduction loss improves efficiency in high-current, low-voltage DC/DC stages
T_J max	+150°C - Extended junction temperature rating enables operation in under-hood automotive environments
R_θJL	23°C/W - Junction-to-lead thermal resistance; informs PCB copper area and thermal pad design for lead-frame heat extraction

Pinout & Package

Package: DO-214AA (SMB), surface-mount plastic case with cathode band polarity indicator, 0.100 g typical weight, UL 94V-0 molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., ground or switch node) in freewheeling path
Cathode	Forward current exit / reverse-blocking terminal	Marked by band; connects to higher-potential rail (e.g., input or inductor output)

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including HTOL, TC, and HAST
Guard ring structure	Enhances ruggedness against transient overvoltage events without external snubbers
Moisture sensitivity level 1	Zero bake requirement before reflow; compatible with standard SMT assembly lines
Halogen-free & RoHS compliant	Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing

Applications

DC/DC Converter Output Rectification	Reverse Battery Protection
Use Scenario: Used on secondary side of synchronous or non-synchronous buck converters in automotive body control modules. IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during high-side switch off-time. Use Value: 0.95 V V_F reduces conduction loss vs. silicon diodes, improving converter efficiency by ~2–3% at 3 A loads.	Use Scenario: Placed in series with vehicle battery feed to prevent damage from accidental reverse connection during jump-start or service. IC Role / Device Role / Timing Role: Unidirectional current valve blocking reverse polarity while conducting normal forward current. Use Value: 70 A I_FSM withstands momentary reverse-connect surges; 100 V V_RRM exceeds 24 V system transients.
Automotive LED Lighting Driver	Freewheeling Diode in Solenoid Drivers
Use Scenario: Integrated into constant-current LED driver circuits for headlamps and DRLs where thermal space is constrained. IC Role / Device Role / Timing Role: Output rectifier and current-path stabilizer in boost or buck-boost topologies. Use Value: +150°C T_J max allows operation near hot LED heatsinks; SMB footprint fits compact lamp housings.	Use Scenario: Mounted across 12 V solenoid coils (e.g., fuel injectors, transmission shift actuators) to suppress inductive kick. IC Role / Device Role / Timing Role: Clamp diode diverting stored magnetic energy back into the coil during de-energization. Use Value: 23°C/W R_θJL enables rapid heat transfer to PCB copper, sustaining repeated 70 A surge pulses without thermal runaway.

DC/DC Converter Output Rectification

Reverse Battery Protection

Use Scenario: Used on secondary side of synchronous or non-synchronous buck converters in automotive body control modules.

IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during high-side switch off-time.

Use Value: 0.95 V V_F reduces conduction loss vs. silicon diodes, improving converter efficiency by ~2–3% at 3 A loads.

Use Scenario: Placed in series with vehicle battery feed to prevent damage from accidental reverse connection during jump-start or service.

IC Role / Device Role / Timing Role: Unidirectional current valve blocking reverse polarity while conducting normal forward current.

Use Value: 70 A I_FSM withstands momentary reverse-connect surges; 100 V V_RRM exceeds 24 V system transients.

Automotive LED Lighting Driver

Freewheeling Diode in Solenoid Drivers

Use Scenario: Integrated into constant-current LED driver circuits for headlamps and DRLs where thermal space is constrained.

IC Role / Device Role / Timing Role: Output rectifier and current-path stabilizer in boost or buck-boost topologies.

Use Value: +150°C T_J max allows operation near hot LED heatsinks; SMB footprint fits compact lamp housings.

Use Scenario: Mounted across 12 V solenoid coils (e.g., fuel injectors, transmission shift actuators) to suppress inductive kick.

IC Role / Device Role / Timing Role: Clamp diode diverting stored magnetic energy back into the coil during de-energization.

Use Value: 23°C/W R_θJL enables rapid heat transfer to PCB copper, sustaining repeated 70 A surge pulses without thermal runaway.

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 ON Semiconductor	Same 100 V V_RRM, 3 A I_F, DO-214AA package; V_F = 0.85 V max @ 3 A - 0.10 V lower than SK310BHR5G	Slightly better efficiency in continuous conduction mode; identical AEC-Q101 qualification	Prefer when minimizing forward loss is critical and layout allows same SMB footprint
SB3100 from Vishay	100 V V_RRM, 3 A I_F, DO-214AA; V_F = 0.82 V max @ 3 A; I_FSM = 80 A - 10 A higher surge rating	Better surge margin for high-energy inductive loads; no AEC-Q101 documentation confirmed	Select for industrial solenoid drivers where automotive qualification is not required

Compared with SS310H and SB3100, SK310BHR5G offers verified AEC-Q101 compliance and tighter thermal resistance (23°C/W vs. typical 25–28°C/W), making it preferred for thermally constrained automotive modules where qualification traceability is mandatory.

Availability

SK310BHR5G is available at Aetrix Electronics and suitable for automotive lighting, DC/DC converter design, and reverse-battery protection circuits requiring stable component supply and long-term production continuity.

Supply support for SK310BHR5G 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 automotive, industrial, and consumer markets since 1979.

The SK3xBH series was developed specifically for high-reliability automotive power conversion, emphasizing low V_F, robust surge handling, and AEC-Q101-compliant process control across voltage grades from 20 V to 200 V.

FAQ

What is the maximum junction temperature rating for SK310BHR5G?

The SK310BHR5G has a maximum junction temperature (T_J) rating of +150°C, validated per AEC-Q101 stress testing. This allows reliable operation in under-hood automotive environments where ambient temperatures exceed 105°C. The device's thermal resistance R_θJL = 23°C/W ensures efficient heat transfer to the PCB, supporting sustained 3 A forward current at elevated temperatures. Always verify board-level thermal design using the SK310BHR5G derating curves.

Is SK310BHR5G suitable for reverse battery protection in 24 V commercial vehicles?

Yes, SK310BHR5G is suitable for reverse battery protection in 24 V systems. Its 100 V V_RRM comfortably exceeds ISO 7637-2 pulse 5a (load dump) peaks up to 60 V and accounts for margin. With 70 A I_FSM, it handles momentary reverse-connect surges. The AEC-Q101 qualification confirms robustness against automotive environmental stresses, and the DO-214AA package supports high-current PCB traces required for starter motor-level fault currents.

What is the forward voltage drop of SK310BHR5G at 3 A and 100°C junction temperature?

The SK310BHR5G datasheet specifies V_F ≤ 0.95 V max at 3 A and 25°C. While no exact value is given at 100°C, Schottky diodes typically exhibit slight V_F reduction with rising temperature - expected to be ~0.88–0.92 V at 100°C. For precise thermal modeling, use the SK310BHR5G forward characteristics curve (Fig.10 in TSC document B2212) which shows V_F vs. I_F at multiple T_J points.

Does SK310BHR5G have a halogen-free and RoHS-compliant construction?

Yes, SK310BHR5G is both halogen-free per IEC 61249-2-21 and RoHS compliant per EU Directive 2011/65/EU. The molding compound is UL 94V-0 rated, and terminals are matte tin plated per J-STD-002. These material specifications are explicitly stated in the TSC SK32BH–SK320BH datasheet Version B2212, page 1, under "Features" and "Mechanical Data."

What packaging format is used for SK310BHR5G, and how many units are per reel?

SK310BHR5G is supplied in tape-and-reel packaging per the DO-214AA (SMB) outline, with 3,000 units per reel. This format is optimized for high-speed pick-and-place assembly. The "R5G" suffix in the part number denotes this standard reel configuration. Reel dimensions and orientation follow EIA-481 standards, and the cathode band is consistently positioned per the marking diagram in the TSC datasheet.

SK310BHR5G 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:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

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

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

SK310BHR5G FAQ

1.How can I place an order for SK310BHR5G through Aetrix?

Please submit a Request for Quotation (RFQ) for SK310BHR5G 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 SK310BHR5G reliable?

The price and inventory of SK310BHR5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK310BHR5G is usually 5 days.

3.What payment methods are accepted for SK310BHR5G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK310BHR5G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SK310BHR5G?

SK310BHR5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SK310BHR5G 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 SK310BHR5G?

For technical support, including SK310BHR5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK310BHR5G requirements.

6.How does Aetrix verify that SK310BHR5G is sourced from the original manufacturer or authorized distributors?

All SK310BHR5G 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 SK310BHR5G meets industry standards.

7.What is the process for return or replacement of SK310BHR5G?

All SK310BHR5G units undergo pre-shipment inspection (PSI). If there is an issue with SK310BHR5G, 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 SK310BHR5G part is unused and in its original packaging.

Return procedure for SK310BHR5G:

1.Submit a request within 90 days.

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

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