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 > Bridge Rectifiers

Taiwan Semiconductor Corporation TS4K40-A

Name: TS4K40-A
Brand: Taiwan Semiconductor Corporation
SKU: TS4K40-A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TS4K40-A

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Bridge Rectifiers

Package:: 4-SIP, TS4K

Datasheet:: TS4K40-A.pdf

Description:: BRIDGE RECT 1PHASE 400V 4A TS4K

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,165

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

Product details

Overview

TS4K40-A from Taiwan Semiconductor is a 4A, 400V standard quad bridge rectifier with glass-passivated junctions, UL Recognized (E-326243), RoHS- and halogen-free compliant, designed for high-reliability AC/DC conversion in compact PCB layouts.

For engineers reviewing the TS4K40-A datasheet, TS4K40-A pinout, TS4K40-A application, or TS4K40-A equivalent, key selection criteria include its 400V repetitive peak reverse voltage (V_RRM), 120A surge capability (I_FSM), 7°C/W junction-to-lead thermal resistance, and TS4K package compatibility with standard 2"×3" aluminum heatsinks.

Technical Context

The TS4K40-A integrates four silicon diodes in a single-phase full-wave bridge configuration, rated for continuous 4A average forward current (I_F) at 150°C junction temperature. Its glass-passivated chip junction ensures stable reverse leakage (<10 µA at 25°C) and robust surge handling (120A I_FSM, 60 A²s I²t rating).

Thermal performance is defined with R_θJL = 7°C/W and R_θJC = 6°C/W when mounted on a 2"×3"×0.25" Al heatsink. Forward voltage is specified at 1.0 V max per diode at 2A/25°C, dropping to 0.9 V at 125°C - critical for efficiency in SMPS and lighting applications.

Key Specifications

Parameter	Value and Actual Design Meaning
I_F	4 A average forward current - supports sustained power delivery in 20–60W adapter and lighting designs
V_RRM	400 V repetitive peak reverse voltage - enables use in 230VAC mains-input circuits with safety margin
I_FSM	120 A surge current (8.3 ms half-sine) - withstands inrush transients in switching power supplies
R_θJL	7 °C/W junction-to-lead thermal resistance - allows direct PCB copper pour heat spreading without forced airflow
V_F @ 2A/25°C	≤1.0 V forward voltage per diode - limits conduction loss to <2W at full load in bridge configuration
I_R @ 25°C	≤10 µA reverse leakage per diode - ensures low standby power in offline SMPS standby modes

Pinout & Package

Package: TS4K - molded plastic case meeting UL 94V-0, matte tin-plated leads, 4.10 g weight, polarity marked on top surface.

Pin/Terminal	Circuit Role	Design Meaning
AC1	Input terminal (anode of D1 / cathode of D2)	One AC input node of full-wave bridge - connects to transformer secondary or line filter output
AC2	Input terminal (cathode of D1 / anode of D2)	Second AC input node - completes bridge AC input pair; symmetrical layout supports bidirectional mounting
+ (Anode common)	DC positive output	Internal connection point of D1 and D3 anodes - delivers rectified positive rail to bulk capacitor
– (Cathode common)	DC negative output / ground reference	Internal connection point of D2 and D4 cathodes - serves as return path and system ground reference

Key Features

Feature	Design Value
Glass-passivated chip junction	Enables stable long-term reverse leakage (<10 µA at 25°C) and immunity to humidity-induced degradation in industrial environments
UL Recognized File # E-326243	Validates compliance with UL 60747-4 for discrete semiconductors - required for end-product safety certification in North America
RoHS & halogen-free (IEC 61249-2-21)	Meets global environmental regulations and eliminates corrosive halogen emissions during PCB reflow or fire events
150°C maximum junction temperature	Supports operation in enclosed, thermally constrained enclosures such as LED drivers and wall adapters without derating below 4A

Applications

Switching Mode Power Supply (SMPS)	AC/DC Adapters
Use Scenario: Primary-side rectification in 24–48W offline flyback converters with universal AC input (85–265VAC). IC Role / Device Role / Timing Role: Quad bridge rectifier converting AC line to pulsating DC for bulk capacitor charging and PWM controller supply. Use Value: 400V V_RRM provides 2× safety margin over 265VAC peak (375V), while 120A I_FSM absorbs transformer reset spikes without failure.	Use Scenario: Compact wall-mounted USB-C PD adapters requiring high reliability and low no-load power. IC Role / Device Role / Timing Role: Input-stage bridge rectifier delivering DC bus to PFC or quasi-resonant controller IC. Use Value: ≤10 µA reverse leakage at 25°C minimizes standby power draw; UL recognition accelerates end-product listing.
LED Lighting Drivers	Industrial Control Power Supplies
Use Scenario: Constant-current LED drivers for commercial troffer and panel lights operating from 230VAC mains. IC Role / Device Role / Timing Role: Mains rectification stage feeding buck or buck-boost DC/DC converter. Use Value: 150°C T_JMAX and 7°C/W R_θJL allow operation in sealed luminaires without active cooling.	Use Scenario: Auxiliary power supply in PLC I/O modules and motor drive control boards exposed to ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Isolated auxiliary rectifier providing +12V/5V rails for logic and gate drivers. Use Value: Glass passivation prevents parameter drift under thermal cycling and humidity stress typical in factory-floor environments.

Switching Mode Power Supply (SMPS)

AC/DC Adapters

Use Scenario: Primary-side rectification in 24–48W offline flyback converters with universal AC input (85–265VAC).

IC Role / Device Role / Timing Role: Quad bridge rectifier converting AC line to pulsating DC for bulk capacitor charging and PWM controller supply.

Use Value: 400V V_RRM provides 2× safety margin over 265VAC peak (375V), while 120A I_FSM absorbs transformer reset spikes without failure.

Use Scenario: Compact wall-mounted USB-C PD adapters requiring high reliability and low no-load power.

IC Role / Device Role / Timing Role: Input-stage bridge rectifier delivering DC bus to PFC or quasi-resonant controller IC.

Use Value: ≤10 µA reverse leakage at 25°C minimizes standby power draw; UL recognition accelerates end-product listing.

LED Lighting Drivers

Industrial Control Power Supplies

Use Scenario: Constant-current LED drivers for commercial troffer and panel lights operating from 230VAC mains.

IC Role / Device Role / Timing Role: Mains rectification stage feeding buck or buck-boost DC/DC converter.

Use Value: 150°C T_JMAX and 7°C/W R_θJL allow operation in sealed luminaires without active cooling.

Use Scenario: Auxiliary power supply in PLC I/O modules and motor drive control boards exposed to ambient temperatures up to 70°C.

IC Role / Device Role / Timing Role: Isolated auxiliary rectifier providing +12V/5V rails for logic and gate drivers.

Use Value: Glass passivation prevents parameter drift under thermal cycling and humidity stress typical in factory-floor environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
GBU4K (ON Semiconductor)	Same 4A/400V rating, GBU package (larger footprint, higher R_θJA = 30°C/W)	Requires larger PCB area and additional heatsinking for equivalent thermal performance	Preferred where legacy GBU footprint compatibility is required and board space permits
GBU4J (Vishay)	Identical electrical specs but lower I_FSM (100A vs. 120A) and no UL recognition	Not suitable for safety-certified end products requiring UL file validation	Select only for cost-sensitive, non-certified internal power rails with lower surge exposure

Compared with GBU4K and GBU4J, the TS4K40-A delivers superior thermal efficiency (R_θJL = 7°C/W), mandatory UL recognition for global safety compliance, and higher surge tolerance - making it optimal for certified, space-constrained, and thermally demanding AC/DC front-ends.

Availability

TS4K40-A is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and LED lighting drivers requiring stable component supply, consistent parametric performance, and full regulatory documentation support.

Supply support for TS4K40-A 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 power, automotive, and industrial markets since 1979.

The TS4K series was developed specifically for high-efficiency, high-reliability AC/DC front-end rectification in compact, thermally constrained applications - emphasizing UL recognition, halogen-free compliance, and robust surge survivability.

FAQ

What is the maximum junction temperature rating for the TS4K40-A?

The TS4K40-A has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official datasheet. This rating allows continuous 4A operation in ambient temperatures up to 70°C when mounted on a 2"×3" aluminum heatsink. The TS4K40-A must not be operated beyond this limit to ensure long-term reliability and avoid thermal runaway.

Does the TS4K40-A have UL recognition, and what is the file number?

Yes, the TS4K40-A is UL Recognized under File # E-326243, confirming compliance with UL 60747-4 for discrete semiconductors. This certification is explicitly stated in the product features and ordering documentation. Engineers specifying the TS4K40-A for end products targeting North American markets can rely on this file number for safety agency submissions without additional qualification testing.

What is the forward voltage drop of the TS4K40-A at rated current?

The TS4K40-A exhibits a maximum forward voltage (V_F) of 1.0 V per diode at I_F = 2A and T_J = 25°C, measured under pulsed conditions (PW = 0.3ms). At elevated junction temperature (125°C), V_F drops to 0.9 V - a characteristic of silicon diodes that improves conduction efficiency in thermally loaded systems using the TS4K40-A.

Is the TS4K40-A compatible with lead-free reflow soldering processes?

Yes, the TS4K40-A features matte tin-plated leads qualified per J-STD-002 for solderability, and its TS4K package uses UL 94V-0 molding compound compatible with standard lead-free reflow profiles (peak temperature ≤260°C). The device's 150°C T_JMAX and thermal resistance values remain valid under these conditions when board-level thermal design is maintained.

How does the TS4K40-A differ from the TS4K60-A and TS4K80-A variants?

The TS4K40-A, TS4K60-A, and TS4K80-A share identical package (TS4K), current rating (4A I_F), thermal performance (R_θJL = 7°C/W), and construction - differing only in repetitive peak reverse voltage (V_RRM): 400V, 600V, and 800V respectively. The TS4K40-A marking code is "TS4K40", and its use is optimized for 230VAC-derived inputs where 400V provides sufficient safety margin without over-specifying voltage rating.

TS4K40-A Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: 4-SIP, TS4K

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

Diode Type:: Single Phase

Technology:: Standard

Voltage - Peak Reverse (Max):: 400 V

Current - Average Rectified (Io):: 4 A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 2 A

Current - Reverse Leakage @ Vr:: 10 µA @ 400 V

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TS4K

TS4K40-A FAQ

1.How can I place an order for TS4K40-A through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4K40-A 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 TS4K40-A reliable?

The price and inventory of TS4K40-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4K40-A is usually 5 days.

3.What payment methods are accepted for TS4K40-A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4K40-A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4K40-A?

TS4K40-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4K40-A 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 TS4K40-A?

For technical support, including TS4K40-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4K40-A requirements.

6.How does Aetrix verify that TS4K40-A is sourced from the original manufacturer or authorized distributors?

All TS4K40-A 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 TS4K40-A meets industry standards.

7.What is the process for return or replacement of TS4K40-A?

All TS4K40-A units undergo pre-shipment inspection (PSI). If there is an issue with TS4K40-A, 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 TS4K40-A part is unused and in its original packaging.

Return procedure for TS4K40-A:

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…