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

Taiwan Semiconductor Corporation 1N5408G-K

Name: 1N5408G-K
Brand: Taiwan Semiconductor Corporation
SKU: 1N5408G-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5408G-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: 1N5408G-K.pdf

Description:: 3A, 1000V, STANDARD RECTIFIER

Quantity:: RFQ Add To RFQ list

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Inventory:3,027

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Product details

Overview

1N5408G-K from Taiwan Semiconductor is a 1000V, 3A standard silicon rectifier diode in DO-201AD package, featuring glass-passivated junction, 125A surge capability, and 1.0V max forward voltage at 3A/25°C. It serves as the primary AC-to-DC conversion element in high-voltage power supplies and switching inverters.

For engineers reviewing the 1N5408G-K datasheet, 1N5408G-K pinout, 1N5408G-K application, or 1N5408G-K equivalent, key selection criteria include peak reverse voltage rating (1000V), thermal resistance (R_θJA = 45°C/W), junction temperature range (–55°C to +150°C), and RoHS/halogen-free compliance for industrial power designs.

Technical Context

This single-die, axial-leaded rectifier operates in unidirectional conduction mode with cathode-banded polarity marking. Its glass-passivated junction ensures stable reverse leakage (<5 µA at 25°C, <100 µA at 125°C) and robust surge tolerance (125A I_FSM, 8.3ms half-sine).

Thermally, it delivers R_θJC = 15°C/W and R_θJA = 45°C/W in DO-201AD package, enabling reliable operation up to 150°C junction temperature under continuous 3A DC forward current with appropriate PCB copper area.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - Maximum repetitive reverse voltage before breakdown; defines safe AC input handling in 700V RMS circuits
I_F	3 A - Continuous average forward current; sets minimum heatsinking requirement for sustained DC output
I_FSM	125 A - Non-repetitive surge current; supports inrush tolerance during cold-start of SMPS and motor drives
V_F	1.0 V max @ 3A/25°C - Forward voltage drop directly determines conduction loss (3W max at full load)
T_J max	+150 °C - Maximum junction temperature; enables operation in sealed enclosures or high-ambient environments
R_θJA	45 °C/W - Junction-to-ambient thermal resistance; requires ≥2.5 cm² 2-oz copper pad for full 3A derating at 70°C ambient

Pinout & Package

DO-201AD package: axial-leaded, molded epoxy case with cathode band marking; lead finish: pure tin, J-STD-002 solderable; UL 94V-0 rated compound; weight ≈1.20 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Forward current entry point	Connected to AC source or transformer secondary; must withstand full surge current path
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to output filter capacitor; polarity marking prevents reverse installation in PCB layout

Key Features

Feature	Design Value
Glass-passivated junction	Eliminates moisture-induced degradation and improves long-term reliability in humid environments
125A surge rating (8.3ms)	Withstands transformer inrush and capacitor charging spikes without failure in offline SMPS
RoHS & halogen-free (IEC 61249-2-21)	Meets global environmental compliance for industrial and consumer power supply manufacturing
Low V_F (1.0V max)	Reduces conduction losses by ~15% vs. legacy 1N54xx variants, improving efficiency in 3A-class supplies

Applications

AC/DC Front-End Rectification	Switching Inverter Output Stage
Use Scenario: Converting 600–800V AC line input to DC bus in industrial power supplies and UPS systems. IC Role / Device Role / Timing Role: Primary rectifying element in voltage-doubler or bridge configuration; handles full line current and transient surges. Use Value: 1000V V_RRM provides 30% margin over 700V RMS line, ensuring safety and longevity under overvoltage transients.	Use Scenario: Freewheeling and clamping in three-phase motor drive inverters operating up to 690V AC line. IC Role / Device Role / Timing Role: Anti-parallel freewheeling diode across IGBTs; conducts reactive energy during PWM dead-time. Use Value: 125A I_FSM and low V_F minimize switching losses and prevent thermal runaway during regenerative braking.
DC-DC Converter Input Stage	High-Voltage Battery Charger Input
Use Scenario: Input rectification in isolated flyback or forward converters accepting 400–600V DC input (e.g., telecom rectifiers). IC Role / Device Role / Timing Role: Unidirectional current gate between HV DC bus and transformer primary; blocks reverse recovery current. Use Value: Low junction capacitance (25 pF) reduces EMI generation during fast voltage transitions in high-frequency SMPS.	Use Scenario: AC input rectification in 800V battery chargers for EV infrastructure and energy storage systems. IC Role / Device Role / Timing Role: First-stage rectifier in dual-stage PFC + LLC topology; interfaces with EMI filter and bulk capacitor. Use Value: 150°C T_J max and 45°C/W R_θJA allow operation in compact, fanless enclosures with minimal thermal derating.

AC/DC Front-End Rectification

Switching Inverter Output Stage

Use Scenario: Converting 600–800V AC line input to DC bus in industrial power supplies and UPS systems.

IC Role / Device Role / Timing Role: Primary rectifying element in voltage-doubler or bridge configuration; handles full line current and transient surges.

Use Value: 1000V V_RRM provides 30% margin over 700V RMS line, ensuring safety and longevity under overvoltage transients.

Use Scenario: Freewheeling and clamping in three-phase motor drive inverters operating up to 690V AC line.

IC Role / Device Role / Timing Role: Anti-parallel freewheeling diode across IGBTs; conducts reactive energy during PWM dead-time.

Use Value: 125A I_FSM and low V_F minimize switching losses and prevent thermal runaway during regenerative braking.

DC-DC Converter Input Stage

High-Voltage Battery Charger Input

Use Scenario: Input rectification in isolated flyback or forward converters accepting 400–600V DC input (e.g., telecom rectifiers).

IC Role / Device Role / Timing Role: Unidirectional current gate between HV DC bus and transformer primary; blocks reverse recovery current.

Use Value: Low junction capacitance (25 pF) reduces EMI generation during fast voltage transitions in high-frequency SMPS.

Use Scenario: AC input rectification in 800V battery chargers for EV infrastructure and energy storage systems.

IC Role / Device Role / Timing Role: First-stage rectifier in dual-stage PFC + LLC topology; interfaces with EMI filter and bulk capacitor.

Use Value: 150°C T_J max and 45°C/W R_θJA allow operation in compact, fanless enclosures with minimal thermal derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06S	600V V_RRM, 3A, TO-220AC package, faster recovery (t_rr = 50 ns)	Lower voltage rating; unsuitable for 1000V line applications but better for high-frequency PFC stages	Select when higher switching speed and lower EMI are prioritized over peak voltage rating
ON Semi MUR460	600V V_RRM, 4A, ultrafast recovery (t_rr = 50 ns), DO-201AD	Higher current rating but lower voltage; not interchangeable in 1000V designs without circuit redesign	Choose for 400–600V SMPS where reduced reverse recovery loss justifies trade-off in V_RRM

Compared with STTH3L06S and MUR460, the 1N5408G-K uniquely supports 1000V reverse blocking in DO-201AD while maintaining cost-effective standard recovery performance-making it optimal for rugged, line-frequency rectification where voltage margin outweighs speed requirements.

Availability

1N5408G-K is available at Aetrix Electronics and suitable for industrial power supplies, EV charging infrastructure, and high-voltage DC-DC converters requiring stable component supply and long-lifecycle availability.

Supply support for 1N5408G-K 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 power electronics markets since 1979.

The 1N540xG-K series is part of TSC's standard rectifier product line, engineered specifically for high-reliability, high-voltage AC/DC front-end conversion in cost-sensitive yet thermally demanding applications.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the 1N5408G-K?

The 1N5408G-K has a V_RRM rating of 1000 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2105). This value defines its safe operating limit under repetitive reverse-bias conditions and distinguishes it from lower-voltage variants like the 1N5406G-K (800 V) and 1N5407G-K (1000 V is exclusive to 1N5408G-K in this family). The 1N5408G-K must not be used in circuits exceeding this voltage without additional protection.

Does the 1N5408G-K have a specified forward voltage (V_F) at full rated current?

Yes-the 1N5408G-K has a maximum forward voltage of 1.0 V at I_F = 3 A and T_J = 25°C, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents worst-case conduction loss. At elevated junction temperatures or higher currents, V_F may increase slightly, but remains within design margins for 3A continuous operation when thermal management is applied.

Is the 1N5408G-K RoHS and halogen-free compliant?

Yes-the 1N5408G-K meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. The "G" suffix denotes green compound, and the "-K" suffix indicates tape-and-reel packaging. These compliance attributes are verified for the exact 1N5408G-K ordering code and apply to all units shipped under this part number.

What is the surge current rating (I_FSM) of the 1N5408G-K, and how is it tested?

The 1N5408G-K is rated for 125 A non-repetitive forward surge current (I_FSM) under an 8.3 ms single half-sine wave condition, as specified in the Absolute Maximum Ratings table. This test simulates worst-case inrush events such as capacitor charging or transformer energization. The rating assumes no more than one such event per cycle and requires adequate cooling between surges to avoid cumulative thermal stress on the 1N5408G-K junction.

What package type and marking does the 1N5408G-K use?

The 1N5408G-K uses the DO-201AD package: axial-leaded, epoxy-molded, with cathode polarity indicated by a distinct band. Its marking code is "1N5408G", printed on the body, followed by date and factory codes. The "-K" suffix denotes 1,250-piece tape-and-reel packaging per the Ordering Information table-distinct from the "A0G" ammo box variant. Lead finish is pure tin, qualified to J-STD-002 for solderability.

1N5408G-K Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 5 µA @ 1000 V

Capacitance @ Vr, F:: 25pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

1N5408G-K FAQ

1.How can I place an order for 1N5408G-K through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5408G-K 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 1N5408G-K reliable?

The price and inventory of 1N5408G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5408G-K is usually 5 days.

3.What payment methods are accepted for 1N5408G-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5408G-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5408G-K?

1N5408G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5408G-K 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 1N5408G-K?

For technical support, including 1N5408G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5408G-K requirements.

6.How does Aetrix verify that 1N5408G-K is sourced from the original manufacturer or authorized distributors?

All 1N5408G-K 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 1N5408G-K meets industry standards.

7.What is the process for return or replacement of 1N5408G-K?

All 1N5408G-K units undergo pre-shipment inspection (PSI). If there is an issue with 1N5408G-K, 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 1N5408G-K part is unused and in its original packaging.

Return procedure for 1N5408G-K:

1.Submit a request within 90 days.

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

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