ACST4-7CH

$0.83

Description：TRIAC 700V 4A IPAK
Series：-

SKU:fdbe7a5249b1 Category: TRIACs Brand: STMicroelectronics

Consult the customer manager about the wholesale price.

consultation hotline：86-132-6715-2157

email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.

Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.

Product introduction

Product Detailed Parameters

Description：TRIAC 700V 4A IPAK
Series：-
Mfr：STMicroelectronics
Package：Tube,Tube
Triac Type：Standard
Voltage - Off State：700 V
Current - On State (It (RMS)) (Max)：4:00 AM
Voltage - Gate Trigger (Vgt) (Max)：1.1 V
Current - Non Rep. Surge 50, 60Hz (Itsm)：30A, 33A
Current - Gate Trigger (Igt) (Max)：25 mA
Current - Hold (Ih) (Max)：35 mA
Configuration：Single
Operating Temperature：-30°C ~ 125°C (TJ)
Mounting Type：Through Hole
Package / Case：TO-251-3 Long Leads, IPak, TO-251AB
Supplier Device Package：IPAK
Grade：-
Qualification：-

Download product information

ACST4-7CH

Overview

The ACST4-7CH is a single-phase AC power switch from STMicroelectronics, utilizing ASD™ technology to integrate a Triac structure with an internal high-voltage clamping device. This component is designed for home appliances and industrial systems, driving loads up to 4 A RMS. It features a repetitive peak off-state voltage of 700 V and withstands line transients per IEC 61000-4-5 standards. The 'C' suffix indicates a gate triggering current (IGT) maximum of 25 mA, while the 'H' suffix denotes a specific package variant within the DPAK family.

Feature Summary

Integrates a Triac structure with an internal overvoltage crowbar protection device to absorb inductive turn-off energy.
Interfaces directly with microcontrollers without requiring external logic level shifting components.
Eliminates the need for external snubber circuits when switching highly inductive loads.
Provides high noise immunity and robust performance against AC line transients.

Applications

Spray pump control in dishwashers
Fan drive in air-conditioning units
AC static switching in appliance control systems

Procurement Notes

Verify the exact physical dimensions and pinout configuration for the 'H' package designation, as standard datasheets primarily detail the 'B' (DPAK) and 'FP' (TO-220FPAB) variants. Confirm that the 'C' suffix corresponds to the specified 25 mA maximum gate trigger current requirements for your controller interface.

Selection Notes

Select this component for applications requiring direct microcontroller interfacing and simplified bill of materials due to integrated transient suppression. Ensure the thermal design accommodates the junction-to-case resistance for the specific load current and ambient temperature conditions expected in the final assembly.

Part Context

This device belongs to the ACST series of AC power switches built on Application Specific Discrete (ASD) technology. It serves as a compact alternative to discrete Triacs combined with varistors or RC snubbers, offering a unified solution for switching low-power resistive and inductive loads in mains-powered equipment.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing PCB footprints if considering alternatives from other manufacturers.

FAQ

Does the ACST4-7CH require an external snubber circuit?

No, thanks to its thermal and turn-off commutation performances, it can drive inductive loads up to 4 A without additional snubber circuits.

How does the ACST4 handle AC line transients?

It sustains voltage spikes up to 2 kV above the peak line voltage by clamping low-energy spikes or breaking over under high-energy shocks, complying with IEC 61000-4-5 standards.