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

Taiwan Semiconductor Corporation S1G

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

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Part No.:: S1G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: S1G.pdf

Description:: DIODE GEN PURP 400V 1A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:3,006

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Product details

Overview

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

For engineers reviewing the S1G datasheet, S1G pinout, S1G application, or S1G equivalent, key selection criteria include repetitive peak reverse voltage (400 V), surge current rating (40 A), thermal resistance (R_θJL = 27 °C/W), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The S1G is a single-die, glass-passivated standard recovery rectifier with a 1500 ns reverse recovery time and 12 pF junction capacitance at 4.0 V reverse bias, optimized for switching-mode power supplies operating below 100 kHz.

Its absolute maximum junction temperature is 175°C, and it meets JESD201 Class 2 whisker resistance and J-STD-020 moisture sensitivity Level 1, supporting reflow soldering without preconditioning.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum repetitive reverse voltage before breakdown; defines safe operating range in flyback and boost converter output stages.
I_F	1 A continuous - Rated average forward current; determines heatsink-free operation up to ambient 75°C per derating curve.
V_F (max)	1.1 V @ 1 A, 25°C - Forward conduction loss directly impacts efficiency in low-voltage output rectification.
I_R (max)	1 µA @ 25°C - Low leakage enables stable voltage hold in high-impedance snubber networks and standby power rails.
t_rr	1500 ns - Standard recovery speed suitable for non-critical switching frequencies ≤100 kHz; not intended for high-frequency synchronous rectification.
R_θJL	27 °C/W - Junction-to-lead thermal resistance supports direct PCB copper pour heat sinking without external heatsinks under 0.5 W dissipation.

Pinout & Package

Package: DO-214AC (SMA), surface-mount, cathode-indicated by band, matte tin-plated leads, UL 94V-0 molding compound, 0.060 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry terminal	Connected to lower-potential side of circuit (e.g., transformer secondary center-tap or switch node); polarity must match schematic symbol.
Cathode	Forward current exit / reverse blocking terminal	Marked by visible band; ties to output rail or filter capacitor positive; reverse voltage applied here during off-state.

Key Features

Feature	Design Value
Glass passivated junction	Enables stable long-term reliability under humidity and thermal cycling; eliminates need for conformal coating in industrial environments.
Moisture sensitivity Level 1	Permits direct placement and reflow without baking; reduces manufacturing overhead and avoids moisture-induced popcorning.
RoHS and halogen-free compliance	Meets IEC 61249-2-21 and EU RoHS directives; supports export to EU, Japan, and other regulated markets without material declaration waivers.
Single half-sine surge rating	Withstands 40 A non-repetitive surge (8.3 ms) - sufficient for inrush limiting in offline AC-DC front-ends and motor drive freewheeling paths.

Applications

DC-DC Converter Output Rectification	Snubber Network Clamping
Use Scenario: Rectifying secondary-side output in isolated 12 V/1 A flyback converters for industrial sensors. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 1.1 V V_F minimizes conduction loss at 1 A load; 400 V V_RRM provides 2× safety margin over reflected output voltage spikes.	Use Scenario: Clamping voltage spikes across MOSFET drains in PWM-controlled solenoid drivers. IC Role / Device Role / Timing Role: Passive clamping diode absorbing inductive kickback energy during switch turn-off. Use Value: 1500 ns t_rr ensures full recovery before next switching cycle; 1 µA I_R prevents DC leakage path in high-Z RC snubbers.
Switching Mode Inverter Input Stage	Lighting Ballast Rectification
Use Scenario: Input bridge rectification in 24 V input, 400 V bus inverters for HVAC blower control. IC Role / Device Role / Timing Role: AC line rectifier feeding bulk capacitor in two-stage inverter front-end. Use Value: 40 A I_FSM handles cold-start surges; 175°C T_JMAX supports operation in enclosed enclosures with limited airflow.	Use Scenario: High-voltage rectification in LED driver EMI filters for streetlight applications. IC Role / Device Role / Timing Role: Input rectifier converting 277 V AC line to DC bus prior to PFC stage. Use Value: 400 V V_RRM exceeds 277 V RMS × √2 ≈ 392 V peak; DO-214AC package allows automated placement on high-density lighting PCBs.

DC-DC Converter Output Rectification

Snubber Network Clamping

Use Scenario: Rectifying secondary-side output in isolated 12 V/1 A flyback converters for industrial sensors.

IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 1.1 V V_F minimizes conduction loss at 1 A load; 400 V V_RRM provides 2× safety margin over reflected output voltage spikes.

Use Scenario: Clamping voltage spikes across MOSFET drains in PWM-controlled solenoid drivers.

IC Role / Device Role / Timing Role: Passive clamping diode absorbing inductive kickback energy during switch turn-off.

Use Value: 1500 ns t_rr ensures full recovery before next switching cycle; 1 µA I_R prevents DC leakage path in high-Z RC snubbers.

Switching Mode Inverter Input Stage

Lighting Ballast Rectification

Use Scenario: Input bridge rectification in 24 V input, 400 V bus inverters for HVAC blower control.

IC Role / Device Role / Timing Role: AC line rectifier feeding bulk capacitor in two-stage inverter front-end.

Use Value: 40 A I_FSM handles cold-start surges; 175°C T_JMAX supports operation in enclosed enclosures with limited airflow.

Use Scenario: High-voltage rectification in LED driver EMI filters for streetlight applications.

IC Role / Device Role / Timing Role: Input rectifier converting 277 V AC line to DC bus prior to PFC stage.

Use Value: 400 V V_RRM exceeds 277 V RMS × √2 ≈ 392 V peak; DO-214AC package allows automated placement on high-density lighting PCBs.

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), same V_RRM/I_F, higher V_F (1.3 V)	Better suited for >100 kHz SMPS where switching loss dominates; less optimal for cost-sensitive 50–100 kHz designs.	Select MUR140 only when t_rr reduction justifies higher conduction loss and cost premium.
Vishay VS-1N4007TR	General-purpose 1 A/1000 V rectifier, slower (t_rr > 2000 ns), higher V_F (1.1 V typ but wider tolerance), axial leaded DO-41	Not surface-mount; requires through-hole assembly and manual rework; unsuitable for automated production.	VS-1N4007TR is a legacy alternative only for prototyping or repair; not recommended for new SMT designs.

Compared with MUR140 and VS-1N4007TR, the S1G delivers optimal balance of cost, manufacturability, and performance for mid-frequency switching applications-offering verified SMT compatibility, tighter V_F control, and superior thermal resistance without ultrafast complexity or through-hole constraints.

Availability

S1G is available at Aetrix Electronics and suitable for DC-DC converters, snubber networks, and lighting ballasts requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.

Supply support for S1G 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 industrial and consumer markets since 1979.

The S1G 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 repetitive peak reverse voltage rating for the S1G?

The S1G has a maximum repetitive peak reverse voltage (V_RRM) of 400 V, as specified in the Absolute Maximum Ratings table of the Taiwan Semiconductor S2102 datasheet. This rating defines the highest reverse voltage the S1G can block continuously without breakdown under normal operating conditions and is critical for selecting appropriate safety margins in power supply designs.

Does the S1G meet RoHS and halogen-free requirements?

Yes, the S1G is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the official Taiwan Semiconductor documentation. These certifications apply to the S1G as part of the S1A–S1M family and are verified for the DO-214AC (SMA) package configuration shipped by Aetrix Electronics.

What is the reverse recovery time (t_rr) of the S1G, and how does it affect circuit performance?

The S1G has a reverse recovery time (t_rr) of 1500 ns under specified test conditions (I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A). This standard recovery speed makes the S1G suitable for switching frequencies up to approximately 100 kHz; using it in higher-frequency topologies may increase switching losses and EMI compared to ultrafast alternatives like the MUR140.

Can the S1G be used in place of the S1J or S1K in a design?

No-the S1G is rated for 400 V V_RRM, while the S1J and S1K are rated for 600 V and 800 V respectively. Substituting the S1G for either would violate voltage safety margins and risk catastrophic failure under transient overvoltage conditions. Always match the exact V_RRM requirement of the application when selecting among the S1A–S1M series, including the S1G.

What is the thermal resistance from junction to lead (R_θJL) for the S1G, and why does it matter?

The S1G has a junction-to-lead thermal resistance (R_θJL) of 27 °C/W, as confirmed in the Thermal Performance section of the S2102 datasheet. This value indicates how effectively heat transfers from the silicon die to the PCB copper via the leads-enabling accurate thermal design for heatsink-free operation up to ~0.5 W power dissipation in typical layouts with adequate copper area.

S1G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

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 FAQ

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

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

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

3.What payment methods are accepted for S1G?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1G?

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

Once your S1G 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?

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

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

All S1G 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 meets industry standards.

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

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

Return procedure for S1G:

1.Submit a request within 90 days.

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

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