American Style Variac 500VA Variable Transformer

This is our American-style variable transformer — what most people call a variac. Turn the dial, and the output moves smoothly from 0 to 260V, holding anywhere in between. It’s the tool labs, repair shops and testing benches reach for when they need dial-in voltage, not fixed voltage.

Key Specifications

Why Choose This Model

Not all variacs are built the same, and the cheap ones fail exactly when you need them. Here is what you are actually getting with this one:

• Real copper winding, real carbon brush. The adjustable output comes from a wound copper toroid and a sliding brush — the classic variac design that has proven itself for decades, not a hacked dimmer circuit.
• Smooth, continuous control. Turn the dial and output moves from 0 to 260V without steps. You can hold it at any voltage in between, which is exactly what testing work needs.
• Readable analog voltmeter. No guesswork — the dial shows your actual output voltage as you adjust.
• Built to sit on a bench for years. Overload protection, fuse and natural-air cooling. No fan noise, no overheating worries on normal duty.
• Factory-backed. 12-month warranty and a Yueqing factory that answers within 24 hours — plus OEM branding from 10 pcs if you resell.

What It Can Do for You

We sell these to labs, repair shops and small manufacturers, and the use cases are remarkably consistent:

• Equipment testing. Feed a device a gradually increasing voltage and watch when it starts acting up — the standard way to test power supplies, motors and electronics.
• Repair benches. Simulate undervoltage and overvoltage conditions to reproduce a customer’s fault before you fix it.
• Universities and training labs. Demonstrate AC voltage control safely and visibly for students.
• Light manufacturing. Dial down mains voltage for heaters, lamps and small motors that need a specific input.

One honest note: a variac is a manual adjustment tool, not an automatic voltage stabilizer. It will not correct a fluctuating mains supply on its own — if you need that, tell us what you are protecting and we will point you to the right gear instead of selling you the wrong one.

Questions Customers Ask Us

Can I use it as a voltage stabilizer?
No — a variac gives you manual, adjustable output. It holds the voltage you set, but it won’t react to mains fluctuations. For automatic regulation you need a stabilizer, which is a different product.

What can a 500VA variac run?
It depends on your load: from small soldering irons and test instruments up to bench equipment drawing around 500VA. If your load is higher, size up.

110V or 220V input?
220V is standard; 110V input is available on request. Tell us your local mains voltage when ordering.

Can I get a digital meter?
Yes — digital display is available as an option instead of the analog dial.

Do you offer OEM?
Yes, your brand on the unit and carton from 10 pcs.

More from This Range

Need a different capacity? The full variac lineup:

See all options: Variable Transformers

Ordering Notes

220V input is standard; 110V input is available on request. If you need a different adjustment range or a digital meter instead of the analog dial, tell us and we’ll build it. These units ship worldwide with 15–25 days production.

Questions about this model? Send an inquiry (sales@wilmall.com) or WhatsApp +86 19730226757 — we reply within 24 hours. Custom capacity and voltages available, MOQ from 10 pcs.

Frequently asked questions