Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Taiwan Semiconductor Corporation 1N5402G-K

Name: 1N5402G-K
Brand: Taiwan Semiconductor Corporation
SKU: 1N5402G-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 1N5402G-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: 1N5402G-K.pdf

Description:: 3A, 200V, STANDARD RECTIFIER

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:5,095

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

1N5402G-K from Taiwan Semiconductor is a glass-passivated standard silicon rectifier diode rated for 3 A average forward current and 200 V repetitive peak reverse voltage, with 125 A surge capability and 1.0 V max forward voltage at 3 A, used in DC-DC converters and switching-mode power supplies.

For engineers reviewing the 1N5402G-K datasheet, 1N5402G-K pinout, 1N5402G-K application, or 1N5402G-K equivalent, key selection criteria include V_RRM = 200 V, I_F = 3 A, I_FSM = 125 A, V_F ≤ 1.0 V @ 3 A, and DO-201AD package compatibility with high-reliability industrial power conversion designs.

Technical Context

This single-die, axial-leaded rectifier operates across -55°C to +150°C junction temperature range and features glass-passivated junction for moisture resistance and long-term stability under thermal cycling. Its low 1.0 V forward voltage at rated current reduces conduction loss in continuous-duty power stages.

Thermal resistance of R_θJA = 45°C/W (free air) and R_θJC = 15°C/W enables effective heat dissipation in compact PCB layouts without forced airflow, while 5 µA max reverse leakage at 25°C supports efficient hold-off in high-impedance bias networks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum non-repetitive reverse voltage the device blocks reliably in circuit
I_F	3 A - Continuous average forward current rating at 75°C case temperature
I_FSM	125 A - Peak one-cycle surge current tolerance (8.3 ms half-sine), critical for inrush handling
V_F	≤1.0 V @ 3 A, 25°C - Low conduction loss enabling >85% efficiency in 12–48 V DC-DC outputs
T_J max	+150°C - Maximum junction temperature allowing operation in sealed enclosures or high-ambient environments
R_θJA	45°C/W - Thermal resistance defining temperature rise per watt in standard PCB mounting
C_J	25 pF @ 4 V - Junction capacitance limiting high-frequency switching noise and EMI in SMPS snubber paths

Pinout & Package

Package: DO-201AD molded plastic case with axial leads, cathode indicated by band, RoHS-compliant pure tin plating, UL 94V-0 rated molding compound, 1.20 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode (lead without band)	Forward current entry point	Connected to input/source side of rectification path; polarity-sensitive for correct DC output polarity
Cathode (lead with band)	Forward current exit / reverse blocking terminal	Connected to output/load side; band orientation must match PCB silkscreen for assembly verification

Key Features

Feature	Design Value
Glass-passivated junction	Prevents moisture ingress and surface degradation, extending lifetime in humid or outdoor-rated power supplies
125 A surge rating	Withstands repeated cold-start surges in AC/DC front-ends without degradation or thermal runaway
Low 1.0 V forward drop	Reduces power loss to ≤3 W at full load, minimizing heatsink requirements in space-constrained adapters
DO-201AD mechanical robustness	Supports automated insertion and wave soldering; meets JESD201 Class 1A whisker resistance for long-term reliability
RoHS & halogen-free compliance	Fulfills EU and global environmental directives without compromising thermal or electrical performance

Applications

AC/DC Front-End Rectification	DC-DC Converter Output Stage
Use Scenario: Full-wave bridge rectification of 115/230 VAC mains in offline SMPS power supplies. IC Role / Device Role / Timing Role: Discrete rectifier diode providing unidirectional current flow and voltage conversion. Use Value: 200 V V_RRM provides 2× safety margin over 100 VAC peak (141 V), ensuring reliable blocking during line transients.	Use Scenario: Secondary-side freewheeling or synchronous rectification in isolated flyback or forward converters. IC Role / Device Role / Timing Role: Standard rectifier conducting during switch off-time to maintain output current continuity. Use Value: 1.0 V V_F limits conduction loss to <3 W at 3 A, improving overall converter efficiency and reducing thermal stress on PCB traces.
Industrial Motor Drive Snubber	Renewable Energy Charge Controller
Use Scenario: Clamping inductive kickback from relay coils or small brushless motor windings. IC Role / Device Role / Timing Role: Freewheeling diode absorbing stored magnetic energy during turn-off transitions. Use Value: 125 A I_FSM handles short-duration spikes without failure, supporting robust protection in 24–48 V control circuits.	Use Scenario: Reverse-polarity protection and battery charging path isolation in solar charge controllers. IC Role / Device Role / Timing Role: Blocking diode preventing battery discharge back through PV array at night. Use Value: 5 µA max I_R at 25°C minimizes standby leakage, preserving battery capacity over extended no-sun periods.

AC/DC Front-End Rectification

DC-DC Converter Output Stage

Use Scenario: Full-wave bridge rectification of 115/230 VAC mains in offline SMPS power supplies.

IC Role / Device Role / Timing Role: Discrete rectifier diode providing unidirectional current flow and voltage conversion.

Use Value: 200 V V_RRM provides 2× safety margin over 100 VAC peak (141 V), ensuring reliable blocking during line transients.

Use Scenario: Secondary-side freewheeling or synchronous rectification in isolated flyback or forward converters.

IC Role / Device Role / Timing Role: Standard rectifier conducting during switch off-time to maintain output current continuity.

Use Value: 1.0 V V_F limits conduction loss to <3 W at 3 A, improving overall converter efficiency and reducing thermal stress on PCB traces.

Industrial Motor Drive Snubber

Renewable Energy Charge Controller

Use Scenario: Clamping inductive kickback from relay coils or small brushless motor windings.

IC Role / Device Role / Timing Role: Freewheeling diode absorbing stored magnetic energy during turn-off transitions.

Use Value: 125 A I_FSM handles short-duration spikes without failure, supporting robust protection in 24–48 V control circuits.

Use Scenario: Reverse-polarity protection and battery charging path isolation in solar charge controllers.

IC Role / Device Role / Timing Role: Blocking diode preventing battery discharge back through PV array at night.

Use Value: 5 µA max I_R at 25°C minimizes standby leakage, preserving battery capacity over extended no-sun periods.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5402RLG (ON Semiconductor)	V_F = 1.2 V max @ 3 A; same V_RRM, I_F, I_FSM, DO-201AD	Slightly higher conduction loss; identical surge and thermal specs	Preferred where legacy ON Semi sourcing or dual-sourcing is required
STTH3L02 (STMicroelectronics)	Fast recovery (t_rr ≈ 50 ns); V_F = 1.15 V; V_RRM = 200 V; I_F = 3 A; DO-201AD	Better high-frequency switching performance but higher cost and V_F	Select when reducing switching losses in >50 kHz topologies outweighs cost and efficiency trade-offs

Compared with 1N5402G-K, the 1N5402RLG offers identical ratings but higher forward voltage, while STTH3L02 adds fast recovery at increased V_F and cost-making 1N5402G-K optimal for cost-sensitive, <50 kHz general-purpose rectification where low V_F and proven reliability are primary.

Availability

1N5402G-K is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and general-purpose power supply designs requiring stable component supply, long-lifecycle support, and RoHS-compliant discrete rectifiers.

Supply support for 1N5402G-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 industrial, computing, and consumer markets since 1979.

The 1N540xG-K series is part of TSC's standard rectifier product line, engineered for high-reliability, cost-effective AC/DC and DC/DC power conversion in industrial and commercial equipment.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the 1N5402G-K?

The 1N5402G-K has a V_RRM of 200 V, verified in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2105). This rating defines the highest reverse voltage the diode can block repeatedly without breakdown, making it suitable for 100 VAC-derived circuits with adequate safety margin. Exceeding this value risks irreversible avalanche failure.

What is the forward voltage (V_F) specification for the 1N5402G-K at rated current?

The 1N5402G-K exhibits a maximum forward voltage of 1.0 V at 3 A and 25°C junction temperature, per the Electrical Specifications table. This low V_F directly reduces conduction losses in power stages-e.g., yielding ≤3 W dissipation at full load-supporting thermally constrained designs without active cooling.

Is the 1N5402G-K compatible with lead-free reflow and wave soldering processes?

Yes, the 1N5402G-K features pure tin-plated leads compliant with J-STD-002 for solderability and meets JEDEC JESD201 Class 1A whisker testing. Its DO-201AD package withstands standard lead-free reflow profiles (peak ≤260°C) and wave soldering, supporting modern RoHS-compliant manufacturing without derating.

Does the 1N5402G-K have a specified junction-to-case thermal resistance?

Yes, the 1N5402G-K has a junction-to-case thermal resistance (R_θJC) of 15°C/W, documented in the Thermal Performance section. This value enables accurate thermal modeling when mounted to heatsinks or metal-core PCBs, distinguishing it from ambient-based R_θJA = 45°C/W used for free-air calculations.

What marking code identifies the 1N5402G-K on the device body?

The 1N5402G-K is marked "1N5402G" on the device body, as confirmed in the Marking Diagram and Absolute Maximum Ratings table. The "G" suffix denotes green (halogen-free) molding compound, and the cathode is identified by a distinct band adjacent to the marking-critical for correct orientation during manual or automated assembly.

1N5402G-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):: 200 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 @ 200 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

1N5402G-K FAQ

1.How can I place an order for 1N5402G-K through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5402G-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 1N5402G-K reliable?

The price and inventory of 1N5402G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5402G-K is usually 5 days.

3.What payment methods are accepted for 1N5402G-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5402G-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5402G-K?

1N5402G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5402G-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 1N5402G-K?

For technical support, including 1N5402G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5402G-K requirements.

6.How does Aetrix verify that 1N5402G-K is sourced from the original manufacturer or authorized distributors?

All 1N5402G-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 1N5402G-K meets industry standards.

7.What is the process for return or replacement of 1N5402G-K?

All 1N5402G-K units undergo pre-shipment inspection (PSI). If there is an issue with 1N5402G-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 1N5402G-K part is unused and in its original packaging.

Return procedure for 1N5402G-K:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…