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

Taiwan Semiconductor Corporation 1T4G A0G

Name: 1T4G A0G
Brand: Taiwan Semiconductor Corporation
SKU: 1T4G A0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1T4G A0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: T-18, Axial

Datasheet:: 1T4G A0G.pdf

Description:: DIODE GEN PURP 400V 1A TS-1

Quantity:: RFQ Add To RFQ list

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Inventory:7,410

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Product details

Overview

1T4G from Taiwan Semiconductor is a 1 A, 400 V repetitive peak reverse voltage (V_RRM) standard silicon rectifier diode in TS-1 package, featuring low forward voltage drop (1.0 V at 1 A, 25°C), 30 A surge capability, and AEC-Q101 qualification option. It serves as a primary AC/DC input rectifier in compact power supplies for industrial control modules.

For engineers reviewing the 1T4G datasheet, 1T4G pinout, 1T4G application, or 1T4G equivalent, key selection criteria include verified V_RRM = 400 V, I_F = 1 A continuous rating, thermal resistance R_θJA = 100 °C/W, TS-1 mechanical compatibility, and RoHS/halogen-free compliance per IEC 61249-2-21.

Technical Context

This single-die standard rectifier operates with unidirectional conduction, defined by cathode-band polarity marking and pure tin-plated leads compliant with J-STD-002 solderability. Its junction temperature range spans −55°C to +150°C, supporting operation in thermally constrained environments.

Electrical behavior is characterized by typical junction capacitance of 10 pF at 1 MHz / 4.0 V reverse bias, reverse leakage ≤5 µA at 25°C and ≤100 µA at 125°C, and forward voltage tightly specified at ≤1.0 V under 1 A DC conditions at 25°C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum non-repetitive reverse voltage the device withstands without breakdown; sets minimum input AC peak rating for bridge or single-phase rectification.
I_F	1 A - Continuous average forward current rating at TA = 25°C; defines steady-state power handling in linear or switching supply front-ends.
I_FSM	30 A - Peak non-repetitive surge current (8.3 ms half-sine); enables robustness against line transients and inrush events.
V_F	≤1.0 V @ 1 A, 25°C - Forward voltage drop directly impacts conduction loss and thermal rise in high-efficiency 1 A rectifier stages.
R_θJA	100 °C/W - Junction-to-ambient thermal resistance; determines required PCB copper area or heatsinking for safe 1 A operation at elevated ambient temperatures.
T_J max	+150 °C - Maximum allowable junction temperature; constrains derating curves and long-term reliability in sealed enclosures.

Pinout & Package

Package: TS-1 - 3 mm miniature molded plastic case with axial leads, UL 94V-0 rated molding compound, cathode band polarity indicator, and 0.200 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to AC input or transformer secondary; must sustain full surge current and reverse recovery stress.
Cathode	Forward current exit point	Marked by colored band; ties to bulk capacitor positive rail; carries full output current and defines reference for voltage sensing.

Key Features

Feature	Design Value
AEC-Q101 qualified option	Available as 1T4G H variant - validated for automotive-grade reliability including temperature cycling, humidity, and whisker resistance (JESD201 Class 2).
Low forward voltage	V_F ≤ 1.0 V @ 1 A - reduces conduction loss by ~15% vs. comparable 1.15 V diodes, lowering thermal load in space-constrained designs.
High surge rating	I_FSM = 30 A - supports >30× rated current for transient immunity in offline SMPS and motor drive snubbers.
RoHS & halogen-free	Compliant per IEC 61249-2-21 - meets global environmental regulations and eliminates corrosive halogen emissions during reflow or failure.

Applications

AC/DC Power Adapter	Industrial PLC Input Stage
Use Scenario: 230 VAC input rectification in wall-mounted 5–12 W adapters powering IoT sensors and smart home hubs. IC Role / Device Role / Timing Role: Primary input rectifier converting AC line to pulsating DC prior to bulk capacitor and PWM controller. Use Value: 400 V V_RRM provides 1.4× safety margin over 230 VAC RMS, while 1.0 V V_F minimizes no-load losses critical for Energy Star compliance.	Use Scenario: Rectifying 24–48 VAC control signals in programmable logic controller (PLC) digital input modules. IC Role / Device Role / Timing Role: Signal-level AC-to-DC conversion feeding optocoupler input circuits with galvanic isolation. Use Value: TS-1 package fits dense PCB layouts; 30 A I_FSM tolerates field-wiring transients common in factory-floor environments.
DC-DC Converter Front-End	Switching Inverter Auxiliary Supply
Use Scenario: Input rectification in isolated 48 V–12 V flyback converters used in telecom power shelves. IC Role / Device Role / Timing Role: High-frequency rectifier in discontinuous conduction mode (DCM) operation with fast line transient response. Use Value: 10 pF junction capacitance limits displacement current and EMI generation during switching node transitions.	Use Scenario: Generating auxiliary 15 V bias for gate drivers in 3-phase IGBT inverters for HVAC compressors. IC Role / Device Role / Timing Role: Secondary-side rectifier in auxiliary flyback supply, operating continuously under variable load. Use Value: −55°C to +150°C T_J range ensures stable operation across inverter chassis temperature gradients up to 100°C ambient.

AC/DC Power Adapter

Industrial PLC Input Stage

Use Scenario: 230 VAC input rectification in wall-mounted 5–12 W adapters powering IoT sensors and smart home hubs.

IC Role / Device Role / Timing Role: Primary input rectifier converting AC line to pulsating DC prior to bulk capacitor and PWM controller.

Use Value: 400 V V_RRM provides 1.4× safety margin over 230 VAC RMS, while 1.0 V V_F minimizes no-load losses critical for Energy Star compliance.

Use Scenario: Rectifying 24–48 VAC control signals in programmable logic controller (PLC) digital input modules.

IC Role / Device Role / Timing Role: Signal-level AC-to-DC conversion feeding optocoupler input circuits with galvanic isolation.

Use Value: TS-1 package fits dense PCB layouts; 30 A I_FSM tolerates field-wiring transients common in factory-floor environments.

DC-DC Converter Front-End

Switching Inverter Auxiliary Supply

Use Scenario: Input rectification in isolated 48 V–12 V flyback converters used in telecom power shelves.

IC Role / Device Role / Timing Role: High-frequency rectifier in discontinuous conduction mode (DCM) operation with fast line transient response.

Use Value: 10 pF junction capacitance limits displacement current and EMI generation during switching node transitions.

Use Scenario: Generating auxiliary 15 V bias for gate drivers in 3-phase IGBT inverters for HVAC compressors.

IC Role / Device Role / Timing Role: Secondary-side rectifier in auxiliary flyback supply, operating continuously under variable load.

Use Value: −55°C to +150°C T_J range ensures stable operation across inverter chassis temperature gradients up to 100°C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R04	V_RRM = 400 V, I_F = 1 A, V_F = 1.15 V @ 1 A - higher forward drop; TO-220AC package (larger footprint)	Requires PCB layout change due to TO-220AC outline; better thermal dissipation but incompatible with TS-1 board space	Select when higher thermal margin is needed and board real estate allows larger package
ON Semi MUR140	V_RRM = 400 V, I_F = 1 A, ultrafast recovery (t_rr < 50 ns) - faster than standard 1T4G (t_rr not specified, typical >500 ns)	Suitable for higher-frequency PFC or resonant topologies where reverse recovery loss dominates	Select only if circuit operates >100 kHz and reverse recovery EMI or loss is critical

Compared with STTH1R04 and MUR140, the 1T4G offers lower V_F and TS-1 footprint for cost-sensitive, space-constrained 50/60 Hz rectification, while trading off thermal headroom and high-frequency recovery performance.

Availability

1T4G is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial PLC input stages, and DC-DC converter front-ends requiring stable component supply, consistent lead-time visibility, and long-term production continuity.

Supply support for 1T4G 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 1T1G–1T7G series is designed as a scalable family of standard rectifiers targeting cost-optimized, high-reliability AC/DC front-end solutions across 50 V to 1000 V V_RRM ratings, with emphasis on manufacturability, thermal stability, and automotive-grade variants.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the 1T4G?

The 1T4G has a V_RRM of 400 V, as confirmed in the Absolute Maximum Ratings table across all versions of the 1T1G–1T7G datasheet (H2104). This rating applies under standard test conditions (T_A = 25°C) and defines the highest reverse voltage the 1T4G can block repeatedly without breakdown. It is critical for selecting appropriate input voltage margins in rectifier circuits.

Is the 1T4G RoHS and halogen-free compliant?

Yes, the 1T4G is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the official datasheet. The molding compound is UL 94V-0 rated, and terminals are pure tin plated to meet J-STD-002 solderability requirements - all verified in Version H2104 documentation.

What package type does the 1T4G use, and what are its key mechanical properties?

The 1T4G uses the TS-1 package: a 3 mm miniature axial-leaded plastic case with cathode band polarity marking, UL 94V-0 flammability rating, and 0.200 g typical weight. Mechanical data confirms pure tin plating, JESD201 Class 2 whisker resistance, and polarity indicated by a visible band - all documented in the MECHANICAL DATA section of the 1T4G datasheet.

Does the 1T4G have AEC-Q101 qualification, and how is it designated?

The base 1T4G is not AEC-Q101 qualified, but the variant 1T4G H is explicitly qualified per AEC-Q101, as noted in the FEATURES and ORDERING INFORMATION sections. The "H" suffix denotes qualification, and ordering code 1T4GH (tape & reel) or 1T4GHA0G (ammo box) identifies the automotive-grade version - both share identical electrical specs with added reliability testing.

What is the forward voltage (V_F) specification for the 1T4G at rated current?

The 1T4G has a maximum forward voltage of 1.0 V at I_F = 1 A and T_J = 25°C, as specified in the ELECTRICAL SPECIFICATIONS table for 1T3G–1T7G group. This value is measured under pulse test conditions (PW = 0.3 ms), and represents the upper limit for conduction loss calculation in thermal design of the 1T4G.

1T4G A0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: T-18, Axial

Packaging:: Tape & Box (TB)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 1A

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

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 5 µA @ 400 V

Capacitance @ Vr, F:: 10pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TS-1

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

1T4G A0G FAQ

1.How can I place an order for 1T4G A0G through Aetrix?

Please submit a Request for Quotation (RFQ) for 1T4G A0G 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 1T4G A0G reliable?

The price and inventory of 1T4G A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1T4G A0G is usually 5 days.

3.What payment methods are accepted for 1T4G A0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1T4G A0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1T4G A0G?

1T4G A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1T4G A0G 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 1T4G A0G?

For technical support, including 1T4G A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1T4G A0G requirements.

6.How does Aetrix verify that 1T4G A0G is sourced from the original manufacturer or authorized distributors?

All 1T4G A0G 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 1T4G A0G meets industry standards.

7.What is the process for return or replacement of 1T4G A0G?

All 1T4G A0G units undergo pre-shipment inspection (PSI). If there is an issue with 1T4G A0G, 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 1T4G A0G part is unused and in its original packaging.

Return procedure for 1T4G A0G:

1.Submit a request within 90 days.

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

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