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

Taiwan Semiconductor Corporation S1GM

Name: S1GM
Brand: Taiwan Semiconductor Corporation
SKU: S1GM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1GM

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: 2-SMD, Flat Leads

Datasheet:: S1GM.pdf

Description:: DIODE GEN PURP 400V 1A MICRO SMA

Quantity:: RFQ Add To RFQ list

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Inventory:11,769

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Product details

Overview

S1GM from Taiwan Semiconductor is a 1A, 400V standard surface-mount silicon rectifier diode in Micro SMA package, featuring 1.10V max forward voltage at 1A/25°C, 20A surge rating, and 780ns reverse recovery time-used in DC-DC converters and switching-mode inverters.

For engineers reviewing the S1GM datasheet, S1GM pinout, S1GM application, or S1GM equivalent, key selection criteria include repetitive peak reverse voltage (400V), thermal resistance (R_θJL = 30°C/W), junction temperature range (–55°C to +175°C), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The S1GM is a single-die, glass-passivated standard rectifier optimized for automated placement and high-reliability surface-mount operation. Its 400V V_RRM, 1A continuous forward current, and 780ns trr support efficient unidirectional conduction in medium-frequency switching topologies.

Thermal performance is defined by R_θJL = 30°C/W and R_θJA = 110°C/W, with moisture sensitivity level 1 per J-STD-020 and matte tin-plated leads compliant with J-STD-002 solderability requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in DC-DC flyback or boost stages
I_F	1 A - Continuous forward current rating; defines steady-state power handling capability
I_FSM	20 A - Non-repetitive surge current (8.3ms half-sine); supports inrush and transient overload tolerance
V_F	≤1.10 V @ 1A, 25°C - Low conduction loss improves efficiency in compact power supplies
t_rr	780 ns - Reverse recovery time; impacts switching losses and EMI in 50–200 kHz SMPS designs
T_J max	+175°C - Maximum junction temperature; enables high-ambient operation without derating in enclosed enclosures
C_J	5 pF @ 1MHz, 4V - Junction capacitance affects high-frequency noise coupling and snubber design

Pinout & Package

Package: Micro SMA - Surface-mount, single-anode/single-cathode configuration with cathode band polarity marking; UL 94V-0 molding compound; weight ≈ 0.006 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of circuit; must withstand full I_F and I_FSM stress
Cathode	Forward current exit point / reverse-blocking terminal	Marked by band; carries full V_RRM during off-state; critical for layout creepage/clearance

Key Features

Feature	Design Value
Glass passivated chip junction	Enhances long-term reliability and humidity resistance in industrial environments without hermetic sealing
Moisture sensitivity level 1	Eliminates bake requirement prior to reflow; compatible with standard SMT assembly lines
RoHS and halogen-free compliance	Meets IEC 61249-2-21 and EU RoHS directives for environmentally regulated end equipment
Matte tin-plated leads	Ensures consistent solder wetting and intermetallic formation per J-STD-002 Class 2 whisker testing

Applications

DC-DC Converter	Switching Inverter
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24V outputs. IC Role / Device Role / Timing Role: Unidirectional current steering device converting high-frequency AC from transformer secondary to regulated DC. Use Value: 1.10V V_F minimizes conduction loss at 1A load; 780ns t_rr limits switching loss in 100 kHz designs.	Use Scenario: Output rectification in solar microinverters or UPS inverters operating at 50–120 kHz. IC Role / Device Role / Timing Role: High-reliability freewheeling and output rectification under repetitive surge conditions. Use Value: 20A I_FSM handles line transients; 175°C T_Jmax sustains operation in thermally constrained heatsinkless layouts.
Industrial Power Supply	AC-DC Adapter
Use Scenario: Input bridge or auxiliary supply rectification in programmable logic controllers and motor drives. IC Role / Device Role / Timing Role: General-purpose rectifier supporting continuous 1A loads with robust thermal margin. Use Value: R_θJL = 30°C/W enables direct PCB copper pour heat sinking; –55°C to +175°C rating ensures field longevity.	Use Scenario: Primary-side or bias supply rectification in wall-mounted AC-DC adapters rated ≤15W. IC Role / Device Role / Timing Role: Cost-optimized, space-constrained rectifier meeting safety and efficiency standards. Use Value: Micro SMA footprint saves board area vs. DO-214AC; halogen-free/UL 94V-0 compliance satisfies regional safety certifications.

DC-DC Converter

Switching Inverter

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24V outputs.

IC Role / Device Role / Timing Role: Unidirectional current steering device converting high-frequency AC from transformer secondary to regulated DC.

Use Value: 1.10V V_F minimizes conduction loss at 1A load; 780ns t_rr limits switching loss in 100 kHz designs.

Use Scenario: Output rectification in solar microinverters or UPS inverters operating at 50–120 kHz.

IC Role / Device Role / Timing Role: High-reliability freewheeling and output rectification under repetitive surge conditions.

Use Value: 20A I_FSM handles line transients; 175°C T_Jmax sustains operation in thermally constrained heatsinkless layouts.

Industrial Power Supply

AC-DC Adapter

Use Scenario: Input bridge or auxiliary supply rectification in programmable logic controllers and motor drives.

IC Role / Device Role / Timing Role: General-purpose rectifier supporting continuous 1A loads with robust thermal margin.

Use Value: R_θJL = 30°C/W enables direct PCB copper pour heat sinking; –55°C to +175°C rating ensures field longevity.

Use Scenario: Primary-side or bias supply rectification in wall-mounted AC-DC adapters rated ≤15W.

IC Role / Device Role / Timing Role: Cost-optimized, space-constrained rectifier meeting safety and efficiency standards.

Use Value: Micro SMA footprint saves board area vs. DO-214AC; halogen-free/UL 94V-0 compliance satisfies regional safety certifications.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR140	400V V_RRM, 1A I_F, 50ns t_rr, DO-41 package	Ultrafast recovery enables higher-frequency operation but requires through-hole mounting	Select when <50ns t_rr is mandatory and board real estate allows axial leaded components
Vishay VS-1EWH04-M3	400V V_RRM, 1A I_F, 1.15V V_F, SMA package, AEC-Q200 qualified	Automotive-grade qualification adds cost; identical footprint but higher V_F	Select for automotive or mission-critical industrial use where AEC-Q200 validation is required

Compared with MUR140 and VS-1EWH04-M3, the S1GM offers the lowest forward voltage among Micro SMA-standard rectifiers at 1.10V, optimal for thermally constrained consumer and industrial SMPS where surface-mount automation and RoHS/halogen-free compliance are mandatory.

Availability

S1GM is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and industrial power supplies requiring stable component supply, tape-and-reel packaging (12,000 pcs/reel), and consistent Micro SMA form factor across production lots.

Supply support for S1GM 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, computing, and consumer markets since 1979.

The S1GM belongs to TSC's standard rectifier product line, designed specifically for cost-sensitive, high-volume surface-mount power conversion applications demanding reliability, automated assembly compatibility, and regulatory compliance.

FAQ

What is the maximum junction temperature rating for the S1GM?

The S1GM has a maximum junction temperature (T_J) rating of +175°C, enabling reliable operation in high-ambient environments such as enclosed industrial power supplies or thermally dense PCB layouts. This rating is validated per absolute maximum ratings in the official Taiwan Semiconductor datasheet revision I2103 and supports extended lifetime under continuous 1A forward current at elevated temperatures.

Does the S1GM have a specified reverse recovery time, and how is it measured?

Yes, the S1GM has a typical reverse recovery time (t_rr) of 780 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, per the official Taiwan Semiconductor datasheet. This parameter directly influences switching losses and EMI generation in 50–200 kHz power converter designs using the S1GM.

Is the S1GM RoHS and halogen-free compliant?

Yes, the S1GM is fully RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the Taiwan Semiconductor product documentation. These compliance attributes make the S1GM suitable for export to EU, China, and other regulated markets requiring environmental substance restrictions.

What is the marking code printed on the S1GM device body?

Each S1GM device is marked with the code "A5" on its package body, as specified in the Absolute Maximum Ratings table of the Taiwan Semiconductor datasheet. This marking distinguishes it from the S1JM variant (marked "A7") and confirms its 400V V_RRM rating.

What is the thermal resistance from junction to lead (R_θJL) for the S1GM?

The S1GM has a typical junction-to-lead thermal resistance (R_θJL) of 30°C/W, enabling effective heat transfer from the die to the PCB copper via the cathode/anode leads. This value is critical for estimating temperature rise under 1A DC load and informs pad layout and copper pour design for the S1GM in thermal-aware power supply layouts.

S1GM Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: 2-SMD, Flat Leads

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):: 780 ns

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

Capacitance @ Vr, F:: 5pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Micro SMA

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

S1GM FAQ

1.How can I place an order for S1GM through Aetrix?

Please submit a Request for Quotation (RFQ) for S1GM 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 S1GM reliable?

The price and inventory of S1GM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1GM is usually 5 days.

3.What payment methods are accepted for S1GM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1GM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1GM?

S1GM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1GM 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 S1GM?

For technical support, including S1GM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1GM requirements.

6.How does Aetrix verify that S1GM is sourced from the original manufacturer or authorized distributors?

All S1GM 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 S1GM meets industry standards.

7.What is the process for return or replacement of S1GM?

All S1GM units undergo pre-shipment inspection (PSI). If there is an issue with S1GM, 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 S1GM part is unused and in its original packaging.

Return procedure for S1GM:

1.Submit a request within 90 days.

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

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