This series of small capacity transformers adopts high-quality cold-rolled silicon steel sheets, high-purity oxygen free copper wires, flame-retardant insulation materials, and is suitable for 50/60Hz power frequency. It fully complies with international authoritative standards and industry specifications, and has core advantages such as small size, light weight, low loss, low noise, good heat dissipation, and comprehensive safety protection. It can meet the voltage conversion needs of household, commercial, and industrial small loads and is suitable for power supply adaptation scenarios of various electrical equipment.
Product Parameter
|
Model |
ST-50VA (Home Mini) |
ST-100VA (Office Commercial) |
ST-200VA (Precision Equipment) |
ST-500VA (industrial small model) |
|
Rated capacity |
50VA |
100VA |
200VA |
500VA |
|
Input voltage (optional) |
AC 220V/110V 50/60Hz |
AC 220V/110V 50/60Hz |
AC 220V/110V 50/60Hz |
AC 220V/380V/110V 50/60Hz |
|
Output voltage (optional) |
AC 12V/24V/36V/110V |
AC 12V/24V/36V/110V/220V |
AC 12V/24V/36V/110V/220V (precise voltage regulation) |
AC 24V/36V/110V/220V/380V (industrial grade voltage regulator) |
|
Rated current (output) |
4.17A(12V)/2.08A(24V)/1.39A(36V) |
8.33A(12V)/4.17A(24V)/2.78A(36V) |
16.67A(12V)/8.33A(24V)/5.56A(36V) |
20.83A(12V)/20.83A(24V)/13.89A(36V) |
|
core material |
High quality cold-rolled silicon steel sheet (0.35mm) |
High quality cold-rolled silicon steel sheet (0.35mm) |
High permeability cold-rolled silicon steel sheet (0.30mm) |
High permeability cold-rolled silicon steel sheet (0.30mm) |
|
Winding material |
High purity oxygen free copper wire (enameled insulation) |
High purity oxygen free copper wire (enameled insulation) |
High purity oxygen free copper wire (multi-layer insulation, precision winding) |
High purity oxygen free copper wire (multi-layer insulation, industrial grade winding) |
|
no-load loss |
≤3W |
≤5W |
≤8W |
≤15W |
|
load loss |
≤15W |
≤25W |
≤45W |
≤100W |
|
Transformer efficiency |
≥92% |
≥93% |
≥94% |
≥95% |
|
operating noise |
≤ 30dB (silent operation) |
≤ 32dB (silent operation) |
≤ 35dB (silent operation) |
≤ 40dB (low-noise operation) |
|
Body dimensions (length x width x height) |
120×80×100mm |
150×100×120mm |
180×120×150mm |
250×180×200mm |
|
body weight |
1.2kg |
2.5kg |
4.8kg |
10.5kg |
|
Operating Temperature |
-20℃~45℃ |
-20℃~45℃ |
-25℃~45℃ |
-25℃~50℃ |
|
Protection level |
IP40 (dustproof) |
IP40 (dustproof) |
IP42 (dustproof/splash proof) |
IP54 (dustproof/splash proof/light impact proof) |
|
insulation class |
Grade B (temperature resistance of 130 ℃) |
Grade B (temperature resistance of 130 ℃) |
F-grade (temperature resistance 155 ℃) |
F-grade (temperature resistance 155 ℃) |
Note: The above are standard parameters, and the input/output voltage can be customized according to user needs; Losses and efficiency may fluctuate slightly due to operating loads and environmental temperature; The actual product shall prevail.
Product feature and application
Adopting a compact structural design, with a minimum volume of only 120 × 80 × 100mm and a weight as low as 1.2kg, it does not require too much installation space and can be directly placed in narrow areas such as desktops, cabinets, and wall corners; Some models are equipped with wall mounted mounting holes, supporting desktop placement and wall mounted installation, suitable for installation needs in various scenarios such as homes, offices, computer rooms, industrial workshops, etc., with convenient and labor-saving handling and installation.
Efficient and low consumption operation, energy-saving and environmentally friendly
Using high-quality cold-rolled silicon steel core and high-purity oxygen free copper wire winding, with high magnetic permeability and good conductivity, effectively reducing no-load loss and load loss, the transformation efficiency is as high as 92%~95%, far superior to ordinary small capacity transformers; Low energy consumption and minimal heat generation during operation, which not only saves electricity consumption but also reduces heat dissipation pressure, in line with the concept of energy conservation and environmental protection. Long term use can reduce electricity costs.
The core components adopt high-precision processing technology, with precise winding of the windings, tight fit of the iron core, low magnetic circuit loss, and the ability to achieve precise voltage conversion. The output voltage stability is high, and the fluctuation error is ≤± 2%; Suitable for 50/60Hz power frequency, with low output waveform distortion and no harmonic interference, it can safely supply power to high quality loads such as precision instruments, medical equipment, communication equipment, etc., avoiding equipment failures caused by unstable voltage.
Optimize the design of the iron core structure, using low-noise silicon steel sheets and shock-absorbing gaskets to reduce the noise generated by iron core vibration; The winding is evenly wound to avoid electromagnetic noise, and the operating noise is as low as 30-40 dB, which is equivalent to the noise of daily conversations and library environments. It does not affect the normal order of sensitive scenes such as home rest, office work, medical treatment, etc.
The iron core is made of high-quality cold-rolled silicon steel sheets, which have stable magnetic properties, low losses, and oxidation resistance; The winding adopts high-purity oxygen free copper wire, which has strong conductivity, low resistance, and corrosion resistance; The shell is made of ABS flame-retardant material (household version)/cold-rolled steel plate (industrial version), which is resistant to drop, wear, and high temperature; The insulation level reaches B/F level, with a temperature resistance of 130 ℃~155 ℃, and can operate stably for a long time, with a service life of more than 10 years.
It can be used in various scenarios.
1. Outdoor camping/RV travel
Suitable for outdoor camping, RV travel, self driving trips and other scenarios
2. Home emergency/power outage backup
Suitable for emergency scenarios such as power outages and sudden disasters in households
3. Field assignments/outdoor live broadcasts
Suitable for outdoor exploration, outdoor construction, outdoor live streaming, film and television shooting and other scenarios without mains power coverage
4. Outdoor event/activity guarantee
Suitable for temporary scenes such as outdoor events, outdoor performances, exhibitions, etc
Production details
① Core: Made of high-quality cold-rolled silicon steel sheets ranging from 0.30 to 0.35mm, which are cut and laminated with high precision. They have high magnetic permeability and low losses, effectively reducing electromagnetic losses and heat generation; Install shock-absorbing gaskets between the iron core and the shell to reduce vibration noise and ensure silent operation.
② Winding: Made of high-purity oxygen free copper wire, with excellent conductivity, low resistance, and low loss; Adopting multi-layer enamel insulation material, with strong insulation performance and good temperature resistance; The winding is evenly and tightly wound, with an error controlled within ± 1%, ensuring precise and stable voltage conversion and avoiding electromagnetic interference.
③ Shell: The household/commercial model is made of ABS flame-retardant material, which is lightweight, corrosion-resistant, and has good insulation properties; The industrial version is made of cold-rolled steel plate, which has been treated with acid washing and spraying, and is resistant to falling, wear, and high temperature; The shell is reserved with heat dissipation holes, and the heat dissipation channels are reasonable to ensure that the equipment runs for a long time without overheating risk.
④ Terminal block: High quality copper terminal block is used, with strong conductivity, good contact, and not easily oxidized; Equipped with insulation protection cover to prevent electric shock accidents, firmly wired to avoid loose connections and poor contact.
Product Certification
Small Capacity Transformer relies on high-quality core components, strict quality control system, and precise processing technology. It has passed multiple international authoritative certifications and industry certifications, with complete qualifications and guaranteed quality
FAQ
Q: Can small capacity transformers convert DC voltage?
A: It's not possible. This series of small capacity transformers are power frequency AC transformers, only suitable for AC voltage conversion and cannot convert DC voltage. If it is necessary to convert DC voltage, equipment such as rectifiers and inverters should be used to convert the DC voltage into AC voltage, and then the transformer can be used for transformation, or a DC converter can be directly selected.
Q: How to choose a transformer with appropriate capacity? Do we need to reserve a margin?
A: The selection of capacity should be based on the total power of the load, and it is recommended to reserve a margin of 20% to 30% to avoid overload. ① Calculate the total power of the load: add up the power of all devices that need to be powered (unit: W); ② Choose transformer capacity: Transformer capacity (VA) ≥ total load power (W) × (1+20%~30%). Example: The total power of the load is 80W, with a 20% margin reserved. A transformer with a capacity of ≥ 96VA should be selected, and the recommended model is 100VA. Reserved margin can avoid overload caused by peak power during equipment startup and extend the service life of transformers.
Q: Is it normal for the transformer to generate heat during operation? How to dissipate heat?
A: Slight heating during operation is a normal phenomenon and poses no safety risks. A small amount of loss is generated during the operation of the transformer core and winding, which is converted into heat. During normal operation, the shell temperature does not exceed 60 ℃. The device has optimized its heat dissipation design: ① The shell is reserved with louver style heat dissipation holes to form a natural ventilation heat dissipation channel; ② The core components are tightly fitted, and heat is quickly conducted to the outer shell; ③ Industrial models are equipped with heat sinks to enhance heat dissipation efficiency. Attention: Avoid stacking debris around the transformer, keep the heat dissipation holes unobstructed, and do not cover the transformer casing to prevent heat accumulation.
Q: Can imported electrical appliances (110V) use 220V mains power through this transformer?
A: Okay. Just select the model with an input voltage of 220V and an output voltage of 110V. Attention during use: ① Confirm that the rated voltage of imported electrical appliances is 110V and the rated power does not exceed the rated capacity of the transformer; ② When wiring, ensure that the input/output terminals correspond correctly and do not connect them in reverse; ③ Only applicable to AC electrical appliances, DC imported appliances require additional rectification equipment. It is recommended to choose a transformer with a power 20% to 30% higher than the electrical appliance to ensure stable operation.
Packing & Shipping
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