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

Taiwan Semiconductor Corporation S1G R3G

Name: S1G R3G
Brand: Taiwan Semiconductor Corporation
SKU: S1G R3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1G R3G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: S1G R3G.pdf

Description:: DIODE GEN PURP 400V 1A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:3,881

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Product details

Overview

S1G R3G from Taiwan Semiconductor is a 1 A, 400 V surface-mount silicon rectifier diode in DO-214AC (SMA) package, featuring glass-passivated junction, 1.1 V max forward voltage at 1 A, 1 µA max reverse leakage at 25°C, and 1500 ns reverse recovery time - used in DC-DC converters and snubber circuits.

For engineers reviewing the S1G R3G datasheet, S1G R3G pinout, S1G R3G application, or S1G R3G equivalent, key selection criteria include repetitive peak reverse voltage (400 V), thermal resistance (R_θJL = 27 °C/W), moisture sensitivity level (MSL 1), RoHS/halogen-free compliance, and DO-214AC mechanical compatibility with automated placement.

Technical Context

This standard recovery rectifier uses a single-die silicon PN junction with glass passivation for enhanced reliability and humidity resistance. Its 1500 ns reverse recovery time and 1.1 V forward voltage reflect trade-offs optimized for cost-sensitive switching-mode power supplies rather than high-frequency or ultra-fast applications.

The device operates across –55°C to +175°C junction temperature range and supports 40 A non-repetitive surge current (8.3 ms half-sine). Thermal performance is defined by 27 °C/W junction-to-lead resistance, enabling direct PCB copper pad heat sinking without additional heatsinking in moderate-power designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - maximum repetitive reverse blocking voltage; defines safe operating limit in DC-DC flyback or buck converter output stage
I_F	1 A continuous - average forward current rating at 75°C ambient; determines minimum trace width and copper area needed
V_F	≤1.1 V @ 1 A, 25°C - forward drop directly impacts conduction loss and thermal rise in power path
I_R	≤1 µA @ 25°C - low leakage enables stable voltage hold in high-impedance snubber or sample-and-hold circuits
t_rr	1500 ns - recovery speed suitable for ≤100 kHz switching; not recommended for >200 kHz PFC or resonant topologies
R_θJL	27 °C/W - junction-to-lead thermal resistance allows direct thermal coupling to PCB copper; critical for derating above 75°C ambient
Package	DO-214AC (SMA) - industry-standard surface-mount outline with cathode band polarity marking and MSL 1 handling

Pinout & Package

DO-214AC (SMA) package: molded epoxy case meeting UL 94V-0, matte tin-plated leads, 0.060 g weight, cathode indicated by band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck, transformer secondary in flyback)
Cathode	Forward current exit / reverse blocking terminal	Marked by band; connects to output rail or snubber capacitor positive; must withstand full V_RRM

Key Features

Feature	Design Value
Glass passivated junction	Enables stable long-term operation under humid conditions and prevents corrosion-induced parameter drift
MSL 1 rating	Allows unlimited floor life and reflow without baking; compatible with standard SMT assembly lines
RoHS & halogen-free	Meets IEC 61249-2-21 and EU RoHS directives; supports environmentally compliant industrial and consumer end products
Low VF and high IFSM	1.1 V forward drop minimizes conduction loss; 40 A surge rating handles startup transients in SMPS without derating

Applications

DC–DC Converter Output Rectification	Snubber Network Diode
Use Scenario: Used as output rectifier in isolated flyback or forward converters delivering up to 12 W at 100 kHz switching frequency. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; blocks reverse voltage during MOSFET off-time. Use Value: 400 V V_RRM safely handles reflected primary spikes; 1.1 V V_F limits conduction loss at 1 A load.	Use Scenario: Placed across switching FET or transformer winding to absorb turn-off energy in low-cost flyback or ZVS circuits. IC Role / Device Role / Timing Role: Clamping diode conducting only during transient voltage overshoot; requires fast enough recovery to avoid latch-up. Use Value: 1500 ns t_rr ensures clean clamping without oscillation; 1 µA I_R avoids DC loading of snubber RC network.
Lighting Ballast Circuit	General-Purpose AC/DC Bridge Input
Use Scenario: Integrated into LED driver input stage for constant-current regulation in commercial LED troffer fixtures. IC Role / Device Role / Timing Role: Half-wave rectifier feeding bulk capacitor; operates continuously at line frequency with thermal cycling. Use Value: 175°C T_JMAX supports high ambient temperatures inside enclosed luminaires; DO-214AC footprint simplifies layout.	Use Scenario: One leg of a four-diode bridge rectifier in universal-input offline SMPS (85–265 VAC). IC Role / Device Role / Timing Role: Conducts during positive half-cycle of AC input; blocks during negative half-cycle. Use Value: 400 V V_RRM provides margin over 265 VAC × √2 ≈ 375 V peak; MSL 1 enables direct use in high-volume manufacturing.

DC–DC Converter Output Rectification

Snubber Network Diode

Use Scenario: Used as output rectifier in isolated flyback or forward converters delivering up to 12 W at 100 kHz switching frequency.

IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; blocks reverse voltage during MOSFET off-time.

Use Value: 400 V V_RRM safely handles reflected primary spikes; 1.1 V V_F limits conduction loss at 1 A load.

Use Scenario: Placed across switching FET or transformer winding to absorb turn-off energy in low-cost flyback or ZVS circuits.

IC Role / Device Role / Timing Role: Clamping diode conducting only during transient voltage overshoot; requires fast enough recovery to avoid latch-up.

Use Value: 1500 ns t_rr ensures clean clamping without oscillation; 1 µA I_R avoids DC loading of snubber RC network.

Lighting Ballast Circuit

General-Purpose AC/DC Bridge Input

Use Scenario: Integrated into LED driver input stage for constant-current regulation in commercial LED troffer fixtures.

IC Role / Device Role / Timing Role: Half-wave rectifier feeding bulk capacitor; operates continuously at line frequency with thermal cycling.

Use Value: 175°C T_JMAX supports high ambient temperatures inside enclosed luminaires; DO-214AC footprint simplifies layout.

Use Scenario: One leg of a four-diode bridge rectifier in universal-input offline SMPS (85–265 VAC).

IC Role / Device Role / Timing Role: Conducts during positive half-cycle of AC input; blocks during negative half-cycle.

Use Value: 400 V V_RRM provides margin over 265 VAC × √2 ≈ 375 V peak; MSL 1 enables direct use in high-volume manufacturing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR140	Ultrafast recovery (t_rr = 50 ns), higher V_F (1.3 V), same DO-214AC package	Better suited for >200 kHz PFC stages; higher conduction loss at 1 A	Select when faster switching or reduced ringing is required despite higher V_F
Vishay VS-1N4007-M3/54	Standard recovery (t_rr > 2000 ns), 1000 V V_RRM, DO-41 through-hole package	Higher voltage margin but incompatible mounting; unsuitable for automated SMT lines	Choose only for through-hole prototyping or legacy repair where DO-214AC is unavailable

Compared with MUR140 and VS-1N4007-M3/54, the S1G R3G offers optimal balance of cost, manufacturability (MSL 1, DO-214AC), and performance for ≤100 kHz industrial power supplies - neither over-specified nor compromised on thermal or environmental robustness.

Availability

S1G R3G is available at Aetrix Electronics and suitable for DC–DC converters, lighting ballasts, snubber networks, and general-purpose AC/DC rectification requiring stable component supply across production lifecycles.

Supply support for S1G R3G 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 industrial, computing, and consumer markets since 1979.

The S1G R3G belongs to TSC's S1A–S1M standard recovery rectifier family, designed specifically for cost-effective, high-reliability AC/DC and DC/DC power conversion in space-constrained surface-mount applications.

FAQ

What is the maximum junction temperature rating for the S1G R3G?

The S1G R3G has a maximum junction temperature (T_JMAX) of +175°C, allowing reliable operation in high-ambient environments such as enclosed LED drivers or industrial power supplies. This rating is validated per JEDEC JESD22-A108 and supports derating curves up to 175°C without parameter shift beyond specification limits. The S1G R3G maintains stable V_F and I_R performance across its full –55°C to +175°C operating range.

Is the S1G R3G suitable for use in a 200 kHz switching power supply?

No - the S1G R3G has a reverse recovery time (t_rr) of 1500 ns, making it appropriate for ≤100 kHz applications like flyback or forward converters. At 200 kHz, its slow recovery causes excessive switching loss and potential voltage overshoot. For 200 kHz designs, consider ultrafast alternatives like MUR140 (50 ns t_rr). The S1G R3G is optimized for cost-sensitive, thermally robust operation-not high-frequency efficiency.

Does the S1G R3G have a halogen-free construction?

Yes, the S1G R3G is halogen-free in accordance with IEC 61249-2-21 and fully RoHS-compliant. Its molding compound contains no brominated or chlorinated flame retardants, and the matte tin-plated leads meet J-STD-002 solderability requirements. This makes the S1G R3G suitable for environmentally regulated end equipment including EU medical peripherals and industrial control panels.

What does the "R3G" suffix indicate in S1G R3G?

The "R3G" suffix is Taiwan Semiconductor's internal reel and packaging code indicating 7,500 units per tape-and-reel shipment in DO-214AC (SMA) package. It does not denote electrical variation - all S1G devices share identical V_RRM = 400 V, I_F = 1 A, and thermal specifications. The base part number remains S1G; R3G identifies the logistics format, not a functional variant of the S1G R3G.

Can the S1G R3G replace a 1N4007 in an existing design?

The S1G R3G can replace a 1N4007 only if the PCB uses DO-214AC (SMA) footprint and the circuit operates ≤100 kHz. While both are 1 A, 1000 V-rated rectifiers, the 1N4007 is DO-41 through-hole with 1000 V V_RRM and >2000 ns t_rr. The S1G R3G offers superior MSL 1 handling and surface-mount compatibility but lower V_RRM (400 V). Verify voltage stress margins before substituting the S1G R3G in place of 1N4007.

S1G R3G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 1 A

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

Reverse Recovery Time (trr):: 1.5 µs

Current - Reverse Leakage @ Vr:: 1 µA @ 400 V

Capacitance @ Vr, F:: 12pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

Operating Temperature - Junction:: -55°C ~ 175°C

S1G R3G FAQ

1.How can I place an order for S1G R3G through Aetrix?

Please submit a Request for Quotation (RFQ) for S1G R3G 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 S1G R3G reliable?

The price and inventory of S1G R3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1G R3G is usually 5 days.

3.What payment methods are accepted for S1G R3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1G R3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1G R3G?

S1G R3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1G R3G 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 S1G R3G?

For technical support, including S1G R3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1G R3G requirements.

6.How does Aetrix verify that S1G R3G is sourced from the original manufacturer or authorized distributors?

All S1G R3G 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 S1G R3G meets industry standards.

7.What is the process for return or replacement of S1G R3G?

All S1G R3G units undergo pre-shipment inspection (PSI). If there is an issue with S1G R3G, 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 S1G R3G part is unused and in its original packaging.

Return procedure for S1G R3G:

1.Submit a request within 90 days.

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

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