01TRANSFORMERS & REGULATORS
Precision Control for High Power
A compact black unit sits quietly on the workbench, its aluminum fins catching the light. It is the kind of tool that earns its place through steady, reliable performance rather than flashy aesthetics.
This SCR voltage regulator allows you to fine-tune output from zero to full power. It suits engineers, hobbyists and industrial users who need smooth control over heating elements, lamps or motors without the hassle of frequent switching.
02MATERIALS
Built with FR-4 and Aluminum
The internal circuitry rests on an FR-4 high-temperature PCB, chosen for its ability to withstand sustained heat loads. An imported thyristor chip handles the core regulation task, while precision high-voltage resistors and capacitors ensure stable output. The exterior shell is cast aluminum, providing both structural rigidity and a pathway for thermal management.
PRACTICAL DETAILS
Compact Size and Mounting Options
Measuring 115 by 100 by 83 millimetres, the main unit weighs just 459 grams. Its small footprint makes it suitable for mounting on equipment panels or keeping portable on a workshop bench. Integrated mounting holes allow for secure installation, while the package carton measures 180 by 100 by 115 millimetres, making storage straightforward.
PROTECTION
Safeguarding the Internal Components
To protect the sensitive SCR during operation, the unit includes a peak voltage absorption circuit. Multiple protection layers help safeguard the electronics against electrical spikes, contributing to longer service life. An independent power switch provides quick access to cut power completely, adding a layer of safety when adjusting settings or troubleshooting.
AT A GLANCE
The key points
- Stepless adjustment from 0 to 220V AC
- Handles up to 4000W resistive load
- FR-4 high-temperature circuit board
- Aluminum fins dissipate heat efficiently
- Compact 115 x 100 x 83 mm body
Product Description
High-power SCR (triac) AC voltage regulator designed for smooth, stepless control of voltage, heating temperature, lamp brightness, and motor speed. Built with an FR-4 high-temperature PCB, imported thyristor chip, and full aluminum heat-dissipation fins for stable performance. Features an independent power switch for safer operation and quick power cut-off. Ideal for DIY and industrial applications where reliable AC 220V to 0–220V adjustment is needed.
Key Features
- Stepless AC control
- Adjust output from 0–220V AC to fine-tune speed/heat/light without frequent on-off cycling.
- 4000W max (resistive load)
- Suitable for high-power resistive devices; for inductive loads, recommended capacity is about 1/3 of resistive.
- Efficient cooling & durable build
- Aluminum housing with conductive aluminum fins supports heat dissipation for steadier operation.
- Upgraded electronics
- FR-4 heat-resistant circuit board, precision high-voltage resistors, and high-voltage capacitors for stable regulation.
- Protection & stability
- Peak voltage absorption circuit and multiple protections help safeguard the SCR during operation.
- Practical installation
- Compact body with mounting holes; portable for workshop benches, equipment panels, and DIY test setups.
Specifications
- Product Type
- SCR (Triac) AC Voltage Regulator
- Model
- NHT-4000W
- Input Voltage
- AC 220V
- Output Voltage
- AC 0–220V (adjustable)
- Maximum Power
- 4000W (resistive load)
- Rated Current
- 9A
- Maximum Current
- 18A
- Material
- Aluminum
- Color
- Black
- Main Unit Size
- 115 x 100 x 83 mm (4.53 x 3.94 x 3.27 in)
- Item Weight
- 459 g (1.01 lb)
- Package Size
- 180 x 100 x 115 mm (7.09 x 3.94 x 4.53 in)
- Package Weight
- 522 g (1.15 lb)
- Output Type
- AC Output (Not DC)
Usage
Use for stepless control of many heating and lighting applications such as rice cookers, water heaters, tungsten lamps, and heating wires, as well as some small motors (observe inductive-load limits). Important: metal enclosure should be safely grounded; this unit outputs AC only. Great for workshops, DIY electronics benches, and industrial equipment where smooth voltage regulation is required.
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