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

Taiwan Semiconductor Corporation S3KHR7G

Name: S3KHR7G
Brand: Taiwan Semiconductor Corporation
SKU: S3KHR7G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S3KHR7G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: S3KHR7G.pdf

Description:: DIODE GEN PURP 800V 3A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:8,784

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Product details

Overview

S3KHR7G from Taiwan Semiconductor is a 3A, 800V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring glass-passivated junction, low forward voltage drop (≤1.15 V at 3 A), high surge capability (230 A @ 1 ms), and 150°C max junction temperature. It serves as primary AC/DC input rectifier in compact offline power supplies.

For engineers reviewing the S3KHR7G datasheet, S3KHR7G pinout, S3KHR7G application, or S3KHR7G equivalent, key selection criteria include repetitive peak reverse voltage (800 V), forward current rating (3 A), thermal resistance (R_θJL = 13 °C/W), reverse recovery time (1500 ns), and moisture sensitivity level (MSL 1).

Technical Context

This device is a single-die, standard-recovery silicon rectifier optimized for high-efficiency, space-constrained SMPS front-end stages. Its 800 V V_RRM supports universal-input (85–265 V_AC) designs with margin, while the 13 °C/W junction-to-lead thermal resistance enables direct PCB copper pour heat sinking without heatsinks.

The 1500 ns reverse recovery time and 60 pF junction capacitance reflect its non-fast-recovery, cost-optimized architecture-suitable for <100 kHz operation where switching loss trade-offs favor conduction efficiency over speed.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	800 V - Supports 600 V DC bus with 33% safety margin in PFC-less offline converters
I_F	3 A continuous - Rated for sustained output up to ~36 W in 12 V SMPS with adequate copper area
I_FSM (8.3 ms)	100 A - Withstands typical inrush surges in adapter input stage without failure
I_FSM (1.0 ms)	230 A - Handles short-duration line transients per IEC 61000-4-5 Level 3
V_F @ 3 A	≤1.15 V - Limits conduction loss to ≤3.45 W at full load, reducing thermal stress on PCB
R_θJL	13 °C/W - Enables >2.5 W dissipation with 30 mm² 2-oz copper pad at 70°C ambient
t_rr	1500 ns - Compatible with flyback and forward converter topologies operating ≤60 kHz

Pinout & Package

Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band; weight ≈0.210 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	AC input connection point	Accepts incoming AC phase; must be routed with clearance ≥2.5 mm for 800 V working voltage
Cathode	DC output connection point	Feeds bulk capacitor; requires low-inductance trace and local decoupling to minimize ringing

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable long-term reliability under humid industrial environments (MSL 1, J-STD-020)
Low forward voltage drop	Reduces conduction loss by ~15% vs. comparable 3A/800V rectifiers with V_F >1.3 V
High surge current capability	Survives repeated cold-start surges in lighting ballasts and open-frame adapters without derating
Halogen-free & RoHS-compliant	Meets IPC-1752A material declaration requirements for EU and China RoHS markets

Applications

LED Driver Power Supply	USB-C PD Adapter Input Stage
Use Scenario: 12–24 V constant-current LED driver with universal AC input (85–265 V_AC). IC Role / Device Role / Timing Role: Primary bridge rectifier converting AC line to unregulated DC bus prior to buck controller. Use Value: 800 V rating ensures margin against line spikes; 3 A rating supports drivers up to 72 W with 25°C ambient rise.	Use Scenario: 65 W USB-C PD adapter using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Input rectifier in discrete bridge configuration feeding active clamp flyback controller. Use Value: 13 °C/W R_θJL allows direct thermal coupling to ground plane, eliminating need for thermal vias in cost-sensitive designs.
Industrial AC/DC Module	Smart Home Power Brick
Use Scenario: DIN-rail mounted 24 V/2 A industrial control power supply. IC Role / Device Role / Timing Role: Single-phase rectifier in full-wave bridge replacing four discrete diodes to reduce footprint and assembly cost. Use Value: MSL 1 rating permits standard reflow without baking; halogen-free construction satisfies UL 62368-1 Annex Q.	Use Scenario: Compact wall-plug power brick for Wi-Fi 6 routers and smart speakers. IC Role / Device Role / Timing Role: High-density rectifier in integrated bridge module with shared thermal pad. Use Value: 0.210 g mass and DO-214AB outline enable automated placement at >15,000 UPH with zero tombstoning risk.

LED Driver Power Supply

USB-C PD Adapter Input Stage

Use Scenario: 12–24 V constant-current LED driver with universal AC input (85–265 V_AC).

IC Role / Device Role / Timing Role: Primary bridge rectifier converting AC line to unregulated DC bus prior to buck controller.

Use Value: 800 V rating ensures margin against line spikes; 3 A rating supports drivers up to 72 W with 25°C ambient rise.

Use Scenario: 65 W USB-C PD adapter using quasi-resonant flyback topology.

IC Role / Device Role / Timing Role: Input rectifier in discrete bridge configuration feeding active clamp flyback controller.

Use Value: 13 °C/W R_θJL allows direct thermal coupling to ground plane, eliminating need for thermal vias in cost-sensitive designs.

Industrial AC/DC Module

Smart Home Power Brick

Use Scenario: DIN-rail mounted 24 V/2 A industrial control power supply.

IC Role / Device Role / Timing Role: Single-phase rectifier in full-wave bridge replacing four discrete diodes to reduce footprint and assembly cost.

Use Value: MSL 1 rating permits standard reflow without baking; halogen-free construction satisfies UL 62368-1 Annex Q.

Use Scenario: Compact wall-plug power brick for Wi-Fi 6 routers and smart speakers.

IC Role / Device Role / Timing Role: High-density rectifier in integrated bridge module with shared thermal pad.

Use Value: 0.210 g mass and DO-214AB outline enable automated placement at >15,000 UPH with zero tombstoning risk.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3R08	Same 3 A / 800 V rating; faster t_rr (75 ns); higher V_F (1.3 V typ)	Better suited for >100 kHz QR flyback; higher conduction loss reduces efficiency at full load	Select when switching frequency exceeds 80 kHz and thermal headroom is available
ON Semi MUR3080CT	Dual common-cathode die; 3 A per leg; faster t_rr (75 ns); TO-220AC package	Requires through-hole mounting and heatsink; unsuitable for ultra-thin adapter designs	Select only when dual-output rectification or legacy through-hole assembly is required

Compared with STTH3R08 and MUR3080CT, the S3KHR7G trades speed for lower forward loss and surface-mount compatibility-making it optimal for cost-sensitive, thermally constrained 50–60 kHz offline converters where board space and reflow yield are critical.

Availability

S3KHR7G is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and AC/DC adapters requiring stable component supply, MSL-1 reflow compatibility, and RoHS/halogen-free compliance.

Supply support for S3KHR7G 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs since 1979.

The S3A–S3M series was designed specifically for high-volume, cost-optimized AC/DC front-end rectification in consumer and industrial power supplies-emphasizing reliability, manufacturability, and regulatory compliance.

FAQ

What is the maximum junction temperature rating for the S3KHR7G?

The S3KHR7G has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet (Version O2301). This rating allows operation in sealed enclosures with limited airflow, provided the thermal design maintains junction temperature below this limit during worst-case load and ambient conditions. Derating curves in the datasheet confirm usable current capacity down to –55°C storage temperature.

Does the S3KHR7G have a defined moisture sensitivity level (MSL)?

Yes, the S3KHR7G is rated MSL 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/85% RH and subjected to standard reflow profiles (including JEDEC J-STD-020D peak of 260°C) without baking. This eliminates pre-reflow drying steps in high-throughput SMT lines-a key advantage over MSL 2b or 3 devices-and is confirmed in the "Features" section of the Taiwan Semiconductor S3A–S3M datasheet.

What is the reverse recovery time (t_rr) specification for the S3KHR7G?

The S3KHR7G has a reverse recovery time (t_rr) of 1500 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the Electrical Specifications table. This value reflects its standard-recovery silicon construction-intentionally optimized for conduction efficiency rather than speed-making it appropriate for offline SMPS operating below 100 kHz, not high-frequency resonant topologies.

Is the S3KHR7G halogen-free and RoHS compliant?

Yes, the S3KHR7G is both halogen-free and RoHS compliant, as explicitly stated in the "Features" section of the Taiwan Semiconductor S3A–S3M datasheet (Version O2301). The molding compound contains no brominated flame retardants, and lead content is below 1000 ppm, satisfying EU Directive 2011/65/EU and China RoHS II requirements for restricted substances.

What package type does the S3KHR7G use, and what are its key mechanical attributes?

The S3KHR7G uses the DO-214AB (SMC) package: a surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002. Key attributes include UL 94V-0 flammability rating, 0.210 g typical weight, cathode band polarity marking, and JEDEC-compliant dimensions (e.g., body length 7.75 mm, width 6.25 mm). These are documented in the "Mechanical Data" and "Package Outline Dimensions" sections of the official datasheet.

S3KHR7G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AB, SMC

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 800 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1.15 V @ 3 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 1.5 µs

Current - Reverse Leakage @ Vr:: 5 µA @ 800 V

Capacitance @ Vr, F:: 30pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AB (SMC)

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

S3KHR7G FAQ

1.How can I place an order for S3KHR7G through Aetrix?

Please submit a Request for Quotation (RFQ) for S3KHR7G 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 S3KHR7G reliable?

The price and inventory of S3KHR7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S3KHR7G is usually 5 days.

3.What payment methods are accepted for S3KHR7G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S3KHR7G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S3KHR7G?

S3KHR7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S3KHR7G 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 S3KHR7G?

For technical support, including S3KHR7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S3KHR7G requirements.

6.How does Aetrix verify that S3KHR7G is sourced from the original manufacturer or authorized distributors?

All S3KHR7G 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 S3KHR7G meets industry standards.

7.What is the process for return or replacement of S3KHR7G?

All S3KHR7G units undergo pre-shipment inspection (PSI). If there is an issue with S3KHR7G, 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 S3KHR7G part is unused and in its original packaging.

Return procedure for S3KHR7G:

1.Submit a request within 90 days.

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

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