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

Taiwan Semiconductor Corporation S4B R7G

Name: S4B R7G
Brand: Taiwan Semiconductor Corporation
SKU: S4B R7G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S4B R7G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: S4B R7G.pdf

Description:: DIODE GEN PURP 100V 4A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:8,461

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Product details

Overview

S4B R7G from Taiwan Semiconductor is a 4A, 100V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring glass-passivated junction, 100A peak surge current capability, 1.15V max forward voltage at 4A, and 10µA max reverse leakage at 25°C - used in AC/DC front-end rectification for compact switching power supplies.

For engineers reviewing the S4B R7G datasheet, S4B R7G pinout, S4B R7G application, or S4B R7G equivalent, key selection criteria include V_RRM = 100V, I_F = 4A, t_rr = 1500ns, thermal resistance R_θJL = 13°C/W, and RoHS/halogen-free compliance for industrial adapter and lighting converter designs.

Technical Context

This single-die standard recovery rectifier operates with a repetitive peak reverse voltage of 100V and supports continuous forward current up to 4A at T_L ≤ 118°C. Its 1500ns reverse recovery time and 60pF junction capacitance reflect trade-offs favoring surge robustness over high-frequency switching efficiency.

The DO-214AB (SMC) package delivers low thermal resistance (R_θJL = 13°C/W) and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards. Cathode polarity is marked by a visible band on the molded body.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum non-repetitive reverse voltage the device blocks without breakdown
I_F	4 A - Continuous average forward current rating at specified lead temperature
I_FSM	100 A - Peak non-repetitive surge current survivable for 8.3ms half-sine wave
V_F (max)	1.15 V @ 4A, 25°C - Forward conduction loss impacting thermal design and efficiency
I_R (max)	10 µA @ 100V, 25°C - Reverse leakage determining off-state power loss and system standby consumption
t_rr	1500 ns - Recovery delay affecting switching losses and EMI in hard-switched topologies
R_θJL	13 °C/W - Junction-to-lead thermal resistance enabling direct heatsinking via PCB copper

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to AC input or transformer secondary; requires adequate copper area for thermal dissipation
Cathode	Forward current exit point	Marked by band; ties to output rail or bulk capacitor positive; defines polarity in bridge or discrete rectifier layout

Key Features

Feature	Design Value
Glass passivated junction	Enables stable long-term reliability under humidity and thermal cycling in unsealed adapter enclosures
Moisture sensitivity level 1	Eliminates bake requirements before reflow, supporting standard SMT assembly without special handling
UL 94V-0 molding compound	Meets flame-retardancy requirements for Class II power supplies and LED drivers
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally regulated end equipment

Applications

AC/DC Adapter Rectification	LED Driver Input Stage
Use Scenario: Converts 100–240V AC mains to DC bus in compact wall-plug adapters rated ≤60W. IC Role / Device Role / Timing Role: Primary-side unidirectional current switch performing full-wave or half-wave rectification. Use Value: 100A surge rating withstands cold-start inrush; 1.15V V_F limits conduction loss at 4A output current.	Use Scenario: Rectifies AC input prior to buck or flyback controller in commercial LED troffer and panel drivers. IC Role / Device Role / Timing Role: Discrete high-current rectifier in offline non-isolated or isolated AC/DC front-end stage. Use Value: DO-214AB footprint enables dense PCB layout; 150°C T_J_MAX supports operation in thermally constrained luminaire housings.
Industrial SMPS Input Stage	DC-DC Converter Pre-Regulator
Use Scenario: Front-end rectification in 24V/48V industrial power modules powering PLC I/O or sensors. IC Role / Device Role / Timing Role: Standard recovery diode in bridge configuration delivering stable DC bus under variable load transients. Use Value: 13°C/W R_θJL allows direct thermal coupling to metal-core PCB, reducing need for external heatsinks.	Use Scenario: Input rectification for isolated DC-DC modules converting 48V telecom input to 12V/5V intermediate bus. IC Role / Device Role / Timing Role: Off-line rectifier feeding bulk capacitor in high-efficiency, low-noise telecom power architecture. Use Value: 10µA reverse leakage at 25°C minimizes standby power draw; halogen-free construction satisfies IPC-1752a reporting.

AC/DC Adapter Rectification

LED Driver Input Stage

Use Scenario: Converts 100–240V AC mains to DC bus in compact wall-plug adapters rated ≤60W.

IC Role / Device Role / Timing Role: Primary-side unidirectional current switch performing full-wave or half-wave rectification.

Use Value: 100A surge rating withstands cold-start inrush; 1.15V V_F limits conduction loss at 4A output current.

Use Scenario: Rectifies AC input prior to buck or flyback controller in commercial LED troffer and panel drivers.

IC Role / Device Role / Timing Role: Discrete high-current rectifier in offline non-isolated or isolated AC/DC front-end stage.

Use Value: DO-214AB footprint enables dense PCB layout; 150°C T_J_MAX supports operation in thermally constrained luminaire housings.

Industrial SMPS Input Stage

DC-DC Converter Pre-Regulator

Use Scenario: Front-end rectification in 24V/48V industrial power modules powering PLC I/O or sensors.

IC Role / Device Role / Timing Role: Standard recovery diode in bridge configuration delivering stable DC bus under variable load transients.

Use Value: 13°C/W R_θJL allows direct thermal coupling to metal-core PCB, reducing need for external heatsinks.

Use Scenario: Input rectification for isolated DC-DC modules converting 48V telecom input to 12V/5V intermediate bus.

IC Role / Device Role / Timing Role: Off-line rectifier feeding bulk capacitor in high-efficiency, low-noise telecom power architecture.

Use Value: 10µA reverse leakage at 25°C minimizes standby power draw; halogen-free construction satisfies IPC-1752a reporting.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH4L06D	V_RRM = 600V, I_F = 4A, t_rr = 65ns, DO-214AB	Ultrafast recovery enables higher-frequency SMPS (>100kHz); lower V_F (1.05V) reduces conduction loss	Select when designing for >100kHz operation or tighter thermal constraints; not drop-in due to different V_RRM and recovery behavior
SB4100	V_RRM = 100V, I_F = 4A, t_rr = 250ns, DO-214AA (SMB)	Shorter recovery time improves light-load efficiency; smaller SMB package reduces board area but raises R_θJA	Prefer for space-constrained designs where 250ns t_rr suffices and thermal margin allows higher R_θJA

Compared with STTH4L06D and SB4100, the S4B R7G prioritizes cost-effective surge robustness and manufacturability over speed or miniaturization - making it optimal for 50/60Hz line-frequency rectification in cost-sensitive, thermally tolerant applications.

Availability

S4B R7G is available at Aetrix Electronics and suitable for AC/DC adapters, LED lighting drivers, industrial SMPS units, and telecom DC-DC pre-regulators requiring stable component supply across production lifecycles.

Supply support for S4B R7G 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, automotive, and industrial markets since 1979.

The S4A–S4M series was developed specifically for high-reliability, high-surge-capability AC/DC rectification in cost-sensitive consumer and industrial power supplies - emphasizing ruggedness, process consistency, and JEDEC-compliant packaging.

FAQ

What is the maximum junction temperature rating for the S4B R7G?

The S4B R7G has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet. This rating applies under steady-state conditions with proper thermal management. Derating curves confirm usable current capacity down to –55°C ambient. The S4B R7G must be operated within this thermal envelope to ensure long-term reliability and avoid parametric shift.

Does the S4B R7G meet RoHS and halogen-free requirements?

Yes, the S4B R7G is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the "Features" section of the Taiwan Semiconductor datasheet. The molding compound contains no brominated or chlorinated flame retardants, and lead content is below 1000 ppm. This makes the S4B R7G suitable for export to EU, China, and other regulated markets requiring full substance compliance documentation.

What is the reverse recovery time (t_rr) of the S4B R7G and how is it measured?

The S4B R7G has a reverse recovery time (t_rr) of 1500 ns, measured under conditions of I_F = 0.5A, I_R = 1.0A, and I_rr = 0.25A, per the Electrical Specifications table. This value reflects its standard recovery behavior - appropriate for line-frequency rectification but not optimized for high-frequency synchronous rectification. The S4B R7G's t_rr is confirmed in Figure 6 of the official datasheet.

Is the S4B R7G pin-compatible with other devices in the S4x family?

Yes, all S4x devices including the S4B R7G share identical DO-214AB (SMC) package dimensions, pinout, and thermal pad layout - enabling direct substitution within the same voltage grade group when board space and thermal design allow. However, V_RRM varies across the family (e.g., S4A = 50V, S4M = 1000V), so electrical validation is required before interchanging S4B R7G with other S4x variants.

What does the 'R7G' suffix in S4B R7G indicate?

The 'R7G' suffix in S4B R7G denotes Taiwan Semiconductor's internal date code and factory marking: 'R7' corresponds to week 7 of year 2023, and 'G' identifies the fabrication facility. This marking appears on the device body per the "Marking Diagram" page of the datasheet and does not affect electrical specifications. The core device remains the S4B - a 100V, 4A rectifier - regardless of R7G or other date-code suffixes.

S4B R7G 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):: 100 V

Current - Average Rectified (Io):: 4A

Voltage - Forward (Vf) (Max) @ If:: 1.15 V @ 4 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 10 µA @ 100 V

Capacitance @ Vr, F:: 60pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

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

S4B R7G FAQ

1.How can I place an order for S4B R7G through Aetrix?

Please submit a Request for Quotation (RFQ) for S4B R7G 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 S4B R7G reliable?

The price and inventory of S4B R7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S4B R7G is usually 5 days.

3.What payment methods are accepted for S4B R7G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S4B R7G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S4B R7G?

S4B R7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S4B R7G 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 S4B R7G?

For technical support, including S4B R7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S4B R7G requirements.

6.How does Aetrix verify that S4B R7G is sourced from the original manufacturer or authorized distributors?

All S4B R7G 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 S4B R7G meets industry standards.

7.What is the process for return or replacement of S4B R7G?

All S4B R7G units undergo pre-shipment inspection (PSI). If there is an issue with S4B R7G, 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 S4B R7G part is unused and in its original packaging.

Return procedure for S4B R7G:

1.Submit a request within 90 days.

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

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