T835T-8FPB STMicroelectronics Triac A (Transistor Outline, Vertical) In Stock
The T835T-8FPB is a snubberless TRIAC from STMicroelectronics rated at 8 A RMS current, 800 V repetition peak off-state voltage (VRRM), and 35 mA gate trigger current. Packaged in a TO-220AB through-hole package, it is designed for AC power switching in consumer and industrial applications.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- T835T-8FPB Datasheet PDF
- Category
- Triac A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8 A RMS on-state current with snubberless turn-off technology
- 800 V VRRM and 900 V VRSM voltage ratings for robust AC line operation
- 35 mA gate trigger current enabling direct microcontroller or optocoupler drive
- TO-220AB through-hole package for easy heat-sinking and board mounting
- Designed for phase-control and full-wave switching in 50/60 Hz AC mains applications
Applications
The T835T-8FPB is well suited for household appliance motor control, lighting dimmers, and heating element regulation operating from 230 V AC mains. Its snubberless design simplifies the surrounding circuit by eliminating the RC snubber network typically required for inductive loads. Industrial soft-start modules, fan speed controllers, and pump control systems also benefit from its robust voltage and current ratings.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for T835T-8FPB:
Frequently Asked Questions
Can the T835T-8FPB directly switch an inductive load such as a washing-machine motor without an RC snubber?
Yes. The T835T-8FPB uses STMicroelectronics snubberless technology, allowing it to commutate reliably on inductive loads at 8 A RMS and up to 800 V VRRM without requiring an external RC snubber network. This reduces BOM count and PCB area.
What gate drive current does the T835T-8FPB require, and can a standard optocoupler supply it?
The T835T-8FPB has a gate trigger current (IGT) of 35 mA. Many dedicated TRIAC-driver optocouplers, such as those rated to 50 mA or 100 mA output, can satisfy this requirement directly, simplifying isolation circuitry in mains-connected designs.
How does the T835T-8FPB's 800 V VRRM rating relate to safe operation on a 230 V AC line?
A 230 V RMS AC supply has a peak voltage of approximately 325 V. The 800 V VRRM rating provides more than 2x safety margin above the peak, and the 900 V VRSM rating accommodates transient overvoltages, making the device well suited for European 230 V mains applications.
Is the TO-220AB package of the T835T-8FPB compatible with standard heat sinks used in appliance control boards?
Yes. The TO-220AB package is an industry-standard through-hole outline with a mounting hole for a screw-attached heat sink. With 3 pins on a 2.54 mm pitch and a metal tab for thermal contact, it fits widely available clip-on or bolt-on heat sinks rated for junction-to-case thermal resistance.
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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.
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