Description
Application
The product is special auto transformer which is connected in different forms.Its output voltage can be regulated smoothly and continuously from zero to the maximum value.The provision of and indication meter is made for the models TDGC2J 0.5, 1, 2, 3, 5KVA.AI models find popular application in industries,agriculture and scientific researches,and are particularly suited to serve as ancillary facilities for such equipment as various machine tools,transistor curve tracers,projecting TV sets,and analytical instruments in petroleum industry,etc.
Output Current
| Model | Phase | Frequency(Hz) | Input voltage(V) | Cutput voltage(V) | Max.Output current(A) | Size/Package(cm) | Qty |
| TDGC2J-0.5KVA | 1 | 50/60 | 110 | 0-130 | 5 | 52×20×34 | 4 |
| TDGC2J-1KVA | 9 | 41.5×24×43 | 2 | ||||
| TDGC2J-2KVA | 18 | 41.5×24×43 | 2 | ||||
| TDGC2J-3KVA | 27 | 66.5×26×49.5 | 2 | ||||
| TDGC2J-5KVA | 45 | 33×28×30 | 1 |
Typical applications for the TDGC2J Variac
Where buyers actually put this frame — matched to the markets and duty cycles we ship into.
- Laboratory bench testingSweep a device from 0 to 250V to find its operating window.
- Motor and fan speed controlVoltage-based speed trim on shaded-pole and small universal motors.
- Heater and oven controlStepless power adjustment for drying, curing and heat-treatment rigs.
- Transformer and relay testingPick-off voltages for turns-ratio and pick-up/drop-out checks.
- Ageing and burn-in racksContinuous adjustable supply for batch soak testing.
- Lighting dimming in studiosResistive lamp dimming without the harmonics of a triac dimmer.
Full specification — TDGC2J series variable autotransformer (Variac)
Every rating below is what we build to at the factory. Confirm your voltage combination and country standard when you enquire.
| Model range | TDGC2J-0.5kVA to TDGC2J-5kVA (pointer-dial and digital variants) |
|---|---|
| Rated capacity | 0.5kVA to 5kVA |
| Number of phases | Single phase |
| Input voltage | 220VAC standard (110V and other voltages to order) |
| Output voltage | 0 to 250VAC continuously adjustable |
| Frequency | 50 / 60 Hz |
| Winding | Single-layer copper winding on a toroidal core, carbon brush tap |
| Duty | Intermittent; derate above 60% of rated output for continuous use |
| Protection | Fuse on input; over-current protection to order |
| Cooling | Natural air convection |
| Mounting | Bench case or panel-mount frame |
| Compliance | CE, RoHS; produced under ISO 9001 quality system |
| Warranty | 12 months from delivery date |
A Variac gives no isolation from the mains — add an isolation transformer where the load must float.
Download & documentation
Send these to your engineering or procurement team before you shortlist a supplier.
- Download the TDGC2J Variac datasheet (PDF)0.5kVA – 5kVA · ratings, protection, applications and ordering data
- Packing & carton quantitiesModel-by-model carton size and pcs per carton for freight costing
- Request the routine test reportPer-unit test sheet, CE / RoHS declaration and ISO 9001 reference, sent as PDF
Get a firm quotation in one working day
Tell us four things and we can quote without a second round of questions:
- Input voltage and output voltage (and the country standard)
- Required capacity in VA or the load list in watts
- Quantity for the first order and the annual volume
- Whether you need OEM branding, a custom socket or a non-standard voltage
Engineering reply, not a sales auto-responder. Samples of 1-2 pcs available for verified buyers.
Talk to the factory directly
- WhatsApp+86 156 5876 3197
- Emailsales@johsuntech.com
- Phone+86-15658763197
- Response timeWithin 24 hours, Mon-Sat
Related pages
FAQ
Can a Variac be left at a fixed output all day?
Not at nameplate rating. The carbon brush contact is rated for intermittent operation, so a Variac holding a fixed output for hours should be derated to roughly 60% of its rating, or replaced with a fixed-ratio transformer plus a tap changer.
Does a variable transformer isolate the load?
No. A Variac is an autotransformer: input and output share the winding, so a fault can put line voltage on the load. Add an isolation transformer wherever the equipment under test must float or where an operator could touch the circuit.
Can I use it on 60Hz and on 110V?
Yes. The winding works on 50Hz or 60Hz within its voltage rating, and 110V input versions are built to order. Confirm the input voltage and frequency when you enquire so the winding and brush position are set up correctly.
Request Quote
Tell us your specifications, quantity, or application scenario and we will reply with a tailored quote.
