ACST1635T-8FP STMicroelectronics Diode (Transistor Outline, Vertical) In Stock
The STMicroelectronics ACST1635T-8FP is a high-power TRIAC rated at 800 V and 16 A (RMS) with a 147 A surge current capability. It is housed in a 3-pin TO-220FPAB fully insulated package, designed for robust AC power control in industrial and appliance applications.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- ACST1635T-8FP Datasheet PDF
- Category
- Diode
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ACST1635T-8FP?
- 800 V off-state voltage rating (VDRM/VRRM)
- 16 A RMS on-state current capacity
- 147 A peak surge current (ITSM)
- 3-pin TO-220FPAB fully insulated (isolated tab) package
- Bidirectional AC switching for direct line-voltage control
- Suitable for 8 ms gate trigger pulse control
What is ACST1635T-8FP used for?
The ACST1635T-8FP is designed for AC power control in home appliances such as washing machines, dishwashers, and motor speed controllers where bidirectional switching of 230 V mains is required. Its 16 A continuous rating and 800 V blocking voltage make it suitable for industrial heating control, lighting dimmers, and soft-start circuits. The fully insulated TO-220FPAB package simplifies thermal management by allowing direct mounting to a heat sink without an isolation pad.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the ACST1635T-8FP datasheet?
ACST1635T-8FP Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ACST1635T-8FP?
Compatible alternatives and drop-in replacements for ACST1635T-8FP:
Frequently Asked Questions
What is the maximum repetitive off-state voltage and RMS on-state current of the ACST1635T-8FP?
The ACST1635T-8FP is rated for 800 V maximum repetitive off-state voltage and 16 A RMS on-state current, making it well-suited for switching 230 V AC mains loads such as motor windings, heating elements, and lamp ballasts in residential and light industrial equipment.
How does the ACST1635T-8FP's fully insulated TO-220FPAB package simplify PCB and thermal design?
The TO-220FPAB package features a fully insulated (isolated) mounting tab, eliminating the need for a separate mica or polymer isolation washer between the device and a grounded heat sink. This reduces assembly steps, lowers thermal resistance to the heatsink, and improves mechanical reliability in high-current 16 A AC switching applications.
Can the ACST1635T-8FP handle short-circuit surge currents in a motor soft-start circuit?
Yes, the ACST1635T-8FP can withstand a non-repetitive peak surge current of 147 A for one half-cycle (8.3 ms at 60 Hz), which provides adequate margin for the inrush currents typical of motor starting, transformer energisation, and capacitive load turn-on events in industrial soft-start applications.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”
You May Also Like
824013
Würth Elektronik
Diode
RGF1B-E3/67A
Vishay
Diode
1SS184,LF
Toshiba
Diode
1SS181,LF
Toshiba
Diode
CDDFN10-3324P
Bourns
Diode
RF1005TF6S
ROHM Semiconductor
Diode
XZTNI54W
SunLED
Diode
BAS 3010A-03W E6327
Infineon
Diode
5.0SMDJ22A
LITTELFUSE
Diode
5.0SMDJ24A
LITTELFUSE
Diode
SKL34
Diotec
Diode
BAV99SH6327XTSA1
Infineon
Diode
BAV99S
Taiwan Semiconductor
Diode
IDP30E120
Infineon
Diode
IDW100E60
Infineon
Diode
BAS3010B03WE6327HTSA1
Infineon
Diode
1N4148W-G3-08
Vishay
Diode
1N4148WS-7-F
Diodes Inc.
Diode
SMV2019-079LF
Skyworks
Diode
SLK34
Diotec
Diode
SK310A-LTP
Micro Commercial Components (MCC)
Diode
ES1J-LTP
Micro Commercial Components (MCC)
Diode
SBYV28-100-E3/73
Vishay
Diode
BYV28-150-TR
Vishay
Diode