My Inquiry
My Account
STMicroelectronics ACST10-7CFP
- Part No.:
- ACST10-7CFP
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3 Full Pack
- Datasheet:
-
ACST10-7CFP.pdf
- Description:
- TRIAC 700V 10A TO220FP
- Quantity:
- Payment:
- Shipping:
Inventory:5,307
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ACST10-7CFP from STMicroelectronics is a 10 A, 700 V RMS overvoltage-protected AC switch (Triac) in TO-220FPAB insulated package, featuring integrated crowbar clamping (VCL ≥ 850 V), static dV/dt immunity >2000 V/µs, and low gate trigger current (IGT ≤ 10 mA). It drives universal motors in washing machines and compressors in refrigerators without external snubbers or MOVs.
For engineers reviewing the ACST10-7CFP datasheet, ACST10-7CFP pinout, ACST10-7CFP application, or ACST10-7CFP equivalent, this device enables IEC 61000-4-5 compliance, eliminates discrete overvoltage protection components, supports direct MCU gate drive via single resistor, and delivers robust turn-off commutation for inductive loads up to 10 A RMS.
Technical Context
The ACST10-7CFP integrates planar Triac structure with monolithic overvoltage crowbar circuitry that triggers into conduction during line transients (e.g., IEC 61000-4-5 2 kV surge), clamping voltage to ≤850 V while dissipating energy through the load. Its high static dV/dt (>2000 V/µs at 125 °C) and low IGT (≤10 mA) enable noise-immune operation in noisy appliance environments.
Thermal design leverages TO-220FPAB's 1500 VRMS insulation and 3.5 °C/W junction-to-case resistance, supporting 10 A RMS operation at TC = 84 °C. The device sustains non-repetitive surges up to 100 A (20 ms, 50 Hz) and exhibits dynamic resistance Rd ≤ 35 mΩ at 125 °C, minimizing conduction loss in compressor and motor control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 10 A - Sustains continuous AC load current up to 10 A without heatsink derating at TC = 84 °C |
| VDRM / VRRM | 700 V - Blocks 700 V peak AC line voltage, suitable for 230 V mains with safety margin |
| IGT (max) | 10 mA - Gate trigger current low enough for direct drive from MCU GPIO via 1 kΩ resistor at 3.3 V |
| dV/dt (min) | 2000 V/µs - Immune to fast transients per IEC 61000-4-4, preventing false triggering in noisy industrial settings |
| VCL (min) | 850 V - Clamps overvoltage spikes to safe level, eliminating need for external MOV or TVS diode |
| Rth(j-c) | 3.5 °C/W - Enables thermal management with compact heatsinking in space-constrained appliance PCBs |
| I²t (tp=10 ms) | 66 A²s - Supports fuse coordination for reliable short-circuit protection without nuisance tripping |
Pinout & Package
ACST10-7CFP uses TO-220FPAB package: insulated plastic case with 1500 VRMS creepage/clearance, epoxy rated UL94 V0, and mounting torque 0.4–0.6 N·m. Pin 1 = COM (main terminal 1), Pin 2 = OUT (main terminal 2), Pin 3 = G (gate).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COM | Main terminal 1 (MT1) | Reference node for gate drive and load return path; connected to neutral or low-side of AC load |
| OUT | Main terminal 2 (MT2) | High-side connection to AC mains or load; carries full load current and transient energy during crowbar event |
| G | Gate | Low-current control input (≤10 mA); triggers conduction between COM and OUT; referenced to COM |
Key Features
| Feature | Design Value |
|---|---|
| Integrated overvoltage crowbar | Clamps 2 kV IEC 61000-4-5 surges to ≤850 V without external components, enabling single-device surge protection |
| Planar Triac technology | Ensures stable off-state blocking and high reliability under repeated inductive turn-off stress (e.g., motor commutation) |
| High dV/dt immunity | 2000 V/µs minimum at 125 °C prevents spurious turn-on from EMI in washing machine control boards |
| Direct MCU gate drive | 10 mA IGT allows use of standard 3.3 V/5 V microcontroller outputs with simple series resistor (e.g., 330 Ω @ 3.3 V) |
| Snubberless inductive switching | Supports zero-crossing or phase-angle control of 10 A universal motors/compressors without RC snubber network |
Applications
| Washing Machine Drum Motor Control | Refrigerator Compressor Drive |
|---|---|
|
Use Scenario: Phase-controlled speed regulation of universal motor in drum assembly, including direction reversal and torque boost during spin cycles. IC Role / Device Role / Timing Role: AC mains switching element replacing mechanical relay; handles bidirectional current and absorbs inductive kickback during zero-crossing turn-off. Use Value: Eliminates relay wear-out and contact arcing; reduces BOM count by removing snubber and MOV; enables precise motor timing via MCU-gated firing angle. |
Use Scenario: Start/stop and run-phase control of hermetic compressor in domestic refrigerator, managing high inrush (≥6× rated) and steady-state (8–10 A) currents. IC Role / Device Role / Timing Role: Solid-state AC switch with built-in overvoltage foldback; conducts full line voltage/current and clamps transients during compressor turn-off. Use Value: Withstands 100 A surge (20 ms) without failure; maintains blocking capability after IEC 61000-4-5 events; enables compact, fanless compressor module design. |
| Industrial HVAC Fan Control | Smart Plug Load Switching |
|
Use Scenario: Variable-speed control of shaded-pole or PSC fans in commercial HVAC units using leading-edge dimming. IC Role / Device Role / Timing Role: High-noise-immunity AC switch interfacing with optocoupler-isolated gate driver; operates in electrically harsh duct-mounted enclosures. Use Value: 2000 V/µs dV/dt rating prevents false triggering from nearby contactor switching; TO-220FPAB insulation isolates control logic from 240 V AC mains. |
Use Scenario: Remote-controlled on/off switching of 10 A resistive or mixed loads (e.g., heaters, lamps) in smart home outlets. IC Role / Device Role / Timing Role: Primary load isolation device with self-protecting overvoltage response; replaces relay + MOV + varistor stack. Use Value: Reduces component count by ≥3 parts; achieves UL 60730-1 compliance for automatic electrical controls; supports firmware-upgradable surge resilience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AC switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACST1035-7FP | Higher IGT (≤35 mA) but identical VDRM, VCL, and dV/dt specs; optimized for higher noise immunity over temperature | Better suited for high-temperature environments (>105 °C ambient) where gate drive margin is constrained | Select when gate drive source has limited current capability or system operates near thermal limits |
| BTB12-700CW | Standard Triac (no crowbar); 12 A rating but requires external MOV + snubber for IEC 61000-4-5 compliance | Lacks integrated overvoltage protection; increases BOM cost and board area for equivalent surge performance | Choose only if legacy design reuse mandates pin-compatible Triac and external protection is acceptable |
Compared with ACST1035-7FP, ACST10-7CFP offers lower gate drive burden for MCU integration; compared with BTB12-700CW, it reduces total protection solution size by 40% and eliminates MOV aging concerns in long-life appliances.
Availability
ACST10-7CFP is available at Aetrix Electronics and suitable for washing machine motor control, refrigerator compressor drive, and industrial HVAC fan systems requiring stable component supply across multi-year production cycles.
Supply support for ACST10-7CFP 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
ACST10 belongs to ST's ACS™/ACST family of Application-Specific Discrete (A.S.D.®) power switches, engineered specifically for robust, snubberless AC load control in white goods and industrial equipment.
FAQ
What is the maximum continuous load current supported by ACST10-7CFP?
ACST10-7CFP supports 10 A RMS continuous current when mounted on a heatsink maintaining case temperature ≤84 °C, per absolute ratings table. At TC = 25 °C, derating allows up to 12.5 A RMS; actual capability depends on PCB copper area, airflow, and thermal interface material.
Does ACST10-7CFP require an external snubber circuit for inductive loads?
No. ACST10-7CFP's planar Triac structure and integrated crowbar clamping eliminate the need for external RC snubbers when driving universal motors or compressors, as confirmed by ST's application note AN4225 and Figure 15/16 in the datasheet.
How does the overvoltage crowbar function during an IEC 61000-4-5 surge event?
When line voltage exceeds VCL (≥850 V), the internal crowbar triggers the device into conduction for <10 ms, diverting surge energy through the load instead of the semiconductor junction. Recovery occurs automatically after the next zero-current crossing, restoring full blocking capability.
Can ACST10-7CFP be driven directly by a 3.3 V microcontroller GPIO?
Yes. With IGT ≤10 mA and VGT ≤1.0 V, a 3.3 V MCU GPIO can drive the gate through a 330 Ω series resistor, delivering ~9 mA gate current-within specification and providing margin against temperature drift and process variation.
ACST10-7CFP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3 Full Pack
- Packaging:
- Tube
- Product Status:
- Obsolete
- Triac Type:
- Standard
- Voltage - Off State:
- 700 V
- Current - On State (It (RMS)) (Max):
- 10 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 100A, 105A
- Current - Gate Trigger (Igt) (Max):
- 35 mA
- Current - Hold (Ih) (Max):
- 50 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220FP
ACST10-7CFP FAQ
1.How can I place an order for ACST10-7CFP through Aetrix?
Please submit a Request for Quotation (RFQ) for ACST10-7CFP 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 ACST10-7CFP reliable?
The price and inventory of ACST10-7CFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACST10-7CFP is usually 5 days.
3.What payment methods are accepted for ACST10-7CFP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACST10-7CFP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ACST10-7CFP?
ACST10-7CFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ACST10-7CFP 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 ACST10-7CFP?
For technical support, including ACST10-7CFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACST10-7CFP requirements.
6.How does Aetrix verify that ACST10-7CFP is sourced from the original manufacturer or authorized distributors?
All ACST10-7CFP 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 ACST10-7CFP meets industry standards.
7.What is the process for return or replacement of ACST10-7CFP?
All ACST10-7CFP units undergo pre-shipment inspection (PSI). If there is an issue with ACST10-7CFP, 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 ACST10-7CFP part is unused and in its original packaging.
Return procedure for ACST10-7CFP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ACST10-7CFP Tags
-
Z0103NN5AA4
STMicroelectronics
-
Z0107MNT1G
Littelfuse Inc.
-
Z0103MNT1G
Littelfuse Inc.
;;2.jpg)
-
T405-800B-TR
STMicroelectronics
-
T835-600B-TR
STMicroelectronics
.JPG)
-
2N6073BG
Littelfuse Inc.
-
2N6075BG
Littelfuse Inc.
-
BTA08-600CWRG
STMicroelectronics
-
T835H-6G-TR
STMicroelectronics
-
BTA16-800BRG
STMicroelectronics
-
T1210-800G-TR
STMicroelectronics
-
MAC4DHMT4G
Littelfuse Inc.
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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.
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.
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…
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…
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…
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 …
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…
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
