الوصف
TC/THG series toroidal AC step up down transformer
- Single or twin output sockets
- Double power core in toroidal form
- Primary fuse protection
- ON/OFF switch with indicator
- Optional input voltage selector
الوظائف
Two suffix families are produced on one platform: TC-D for the smaller frames and THG for the standard market, together covering 100VA to 10KVA. The transformer is designed for equipment rated at the opposite mains voltage from the supply it will be connected to, and will carry any electrical or electronic load up to its rated wattage.
| الطراز | الطاقة الاستيعابية | حجم العبوة (سم) | الكمية/الحزمة |
| TC-100D | 100W | 24×20.5×19 | 8 قطع |
| TC-200D | 200W | 24×20.5×19 | 8 قطع |
| TC-300D | 300W | 24×20.5×19 | 8 قطع |
| TC-500D | 500W | 32×17.5×26.5 | 6 قطع |
| TC-750D | 750W | 32×17.5×26.5 | 6 قطع |
| TC-1000D | 1000W | 32×17.5×26.5 | 6 قطع |
| TC-1500D | 1500W | 46×25.5×22 | 2 قطعة |
| TC-2000D | 2000W | 46×25.5×22 | 2 قطعة |
| TC-3000D | 3000W | 46×25.5×22 | 2 قطعة |
| TC-4000D | 4000W | 31.5×23.5×27 | 1 قطعة |
| TC-5000D | 5000W | 31.5×23.5×27 | 1 قطعة |
| TC-7500D | 7500W | 40×29×29 | 1 قطعة |
| TC-10000D | 10000W | 40×29×29 | 1 قطعة |
■ How to Choose This Transformer
Choose the frame from the appliance, not from the transformer. Read the input wattage on the rating plate, add up whatever will be connected at the same time, then apply a factor of 1.5 for resistive and electronic equipment, 2.5–3 for motors and pumps and up to 5 for compressors. The small TC-D frames from 100VA to 300VA suit electronics and small audio equipment; 500VA to 1000VA covers kitchen appliances and power tools; from 1500VA the transformer is usually serving a single machine or a small circuit.
Three details to confirm:
- which direction the conversion runs and what the local mains voltage actually measures;
- whether one or two output sockets are required, and to which standard;
- how the unit will be installed, since the single-bolt toroidal mounting needs a firm, flat surface.
■ Practical Notes on Toroidal Converters
Inrush current on switching a toroidal core is higher than on a laminated one, so the primary fuse should be of the correct type rather than simply matched to running current. The single mounting bolt must be firm but not over-tightened, as excessive pressure can distort the core and raise no-load current. Because stray field is very low these units can be positioned close to signal electronics without shielding, but they are sensitive to any DC offset on the supply — where the mains carries a DC component, a small series choke is worth considering.
■ Pricing, Ordering & Quality Assurance
Step Up & Step Down Transformer Price Range (100VA–10KVA)
Pricing for the DT/ST series depends on capacity, the input/output voltage combination you need, socket type, and whether a voltage selector or MCB protection is fitted. The table below gives indicative FOB levels so you can budget before requesting a firm quotation.
| الطراز | الطاقة الاستيعابية | Input / Output Voltage | تطبيق نموذجي | Indicative FOB Price (per pc)* |
|---|---|---|---|---|
| ST/DT-100 | 100VA | 110V ↔ 220V selectable | Small electronics, chargers, control circuits | US$ 10–15 |
| ST/DT-200 | 200VA | 110V ↔ 220V selectable | Bench instruments, small appliances | US$ 11–16 |
| ST/DT-300 | 300VA | 110V ↔ 220V selectable | Audio equipment, laboratory benches | US$ 12-18 |
| ST/DT-500 | 500 فولت أمبير | 110V ↔ 220V selectable | Refrigeration units, printers, POS systems | US$ 12-20 |
| ST/DT-1000 | 1000 فولت أمبير | 110V ↔ 220V selectable | Power tools, kitchen equipment, single machines | US$ 21-30 |
| ST/DT-1500 | 1500 فولت أمبير | 110V ↔ 220V selectable | Motor-driven machines, imported appliances | US$ 23-35 |
| ST/DT-2000 | 2000 فولت أمبير | 110V ↔ 220V selectable | Compressors, welders, multi-outlet benches | US$ 25-37 |
| ST/DT-3000 | 3000 فولت أمبير | 110V ↔ 220V selectable | Small production lines, test rigs | US$ 33-43 |
| ST/DT-5000 | 5000 فولت أمبير | 110V ↔ 220V selectable | HVAC, industrial machinery | US$ 52-62 |
| ST/DT-7500 | 7500VA | 110V ↔ 220V selectable | Heavy workshop loads | US$ 75-87 |
| ST/DT-10000 | 10000 فولت أمبير | 110V ↔ 220V selectable | CNC equipment, whole-panel supply | US$ 85-112 |
* Indicative FOB Ningbo/Shanghai, standard configuration, based on 50 pcs per size. Not a formal offer — final price depends on your voltage combination, socket standard, enclosure and order quantity.
- The efficiency of the DT/ST series is 80%. For equipment with motors or compressors, the starting current will multiply — always reserve adequate power margin.
- Pure resistive / electronic loads: choose a transformer with capacity ≥ 1.5× the equipment rated power.
- Inductive loads such as motors and compressors: choose a transformer with capacity ≥ 2.5–3× the equipment rated power.
- This table is for reference only. Confirm the final solution according to the rated power and duty cycle shown on your equipment nameplate.
MOQ, Lead Time & Ordering Information
| Minimum Order Quantity (MOQ) | 1 PC for standard DT models. Smaller trial orders can be discussed for first-time buyers. |
|---|---|
| Custom / OEM orders | 50 PCS for custom voltage, custom socket layout, branded front panel or non-standard capacity. |
| Sample | 1-2 pcs sample available for verified buyers. Sample lead time 3-5 working days. |
| المهلة الزمنية | 10-20 working days for standard models after order confirmation and deposit; 15-25 working days for OEM or custom configurations. |
| التعبئة | Export carton with foam. 1/2/6 pcs per carton – see the packing table above. |
| Payment terms | 100% TT IN ADVANCE FOR RETAIL/SAMPLE; 30% TT IN ADVANCE AS DEPOSIT, THE BALANCE BEFORE SHIPMENT. |
| Shipping | FOB Ningbo. CIF and door-to-door available on request. |
| الضمان | 12 MONTHS FROM DELIVERY DATE |
Certifications & Quality Assurance
DT/ST series step up and step down transformers are produced under our ISO 9001 quality management system, and every unit is 100% function-tested before packing.
CE Certified | RoHS Compliant | IEC Tested | ISO 9001 | EMC Tested | 12-Month Warranty
Certificates and routine test reports can be issued as PDF on request, for customs clearance, tender submissions or distributor onboarding.
■ FAQ
Which frame should I pick for a 1.5kW appliance?
1,500W of resistive load suits a 2000VA frame or larger. If the appliance has a motor or compressor, apply the surge factor first — a 1,500W compressor would call for a 5000VA frame.
Is the TC-D the same product as the THG?
They share the winding technology, the double power core and the fuse philosophy. The difference is the enclosure size, which is why the two families are catalogued separately.
Will the transformer run continuously?
Yes, within rating. For 24/7 duty we advise loading to no more than 80 % of the nameplate figure, and derating further if the unit is installed inside a panel rather than in free air.
Which sockets can be supplied?
US, UK, EU Schuko, Australian, South African and universal layouts are all produced. The standard is fitted during assembly, so it must be specified on the order.
طلب عرض أسعار
أخبرنا بالمواصفات أو الكمية أو سيناريو الاستخدام، وسنرد عليك بعرض أسعار مخصص.
