WEE Technology Company Limited - WEE are Capacitors Specialist
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WEE Technology Company Limited - WEE are Capacitors Specialist
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WEE Technology Company Limited - WEE are Capacitors Specialist
What are the differences between carbon film resistance and metal film resistance
1. The carbon film resistance has a negative temperature coefficient, while the metal film resistance has a small positive temperature coefficient;
2. Carbon film resistance is an ordinary resistance, and its accuracy is generally not very high, while metal film resistance has higher accuracy than carbon film resistance. However, due to the improvement of current technology, this method is sometimes not very desirable;
3. The appearance of carbon film resistors is mostly khaki or pink, while the appearance of metal film resistors is mostly blue;
4. By looking at the color of the protective paint, the black protective film is carbon film resistance, while the bright white protective film is metal film resistance.
What are the characteristics of carbon film resistance and metal film resistance
1、 Carbon film resistance
For the carbon film resistance, it uses carbon to precipitate on the magnetic rod or porcelain tube, and at the same time forms a layer of crystalline carbon film on its surface. By changing the thickness of the carbon film and changing the degree of the carbon film resistance by grooving, the required resistance value is finally obtained. Finally, the surface is coated with epoxy resin to strengthen the sealing. The appearance color is basically earthy yellow, but there are also other colors, such as pink.
The color ring is composed of four rings. The resistance range is 1 Ω~10M Ω. The rated power is 0.125W, 0.25W, 0.5W, 1W, etc. The accuracy range is ± 10%, ± 5%, ± 2%. This resistance is generally large and is often used in low-cost products, such as power supply products and chargers. This type of resistance is not recommended for starting resistance, because the impact resistance is relatively defective.
2、 Metal film resistance
As for the metal film resistor, it is formed by vacuum evaporation or infiltration on the ceramic pipe rack to form a layer of metal film, which is attached to the surface of white ceramics. It is cut to adjust the resistance value to obtain a more precise resistor. This resistor has high precision, small volume, good stability and high cost. It is usually used in wireless electronic equipment, especially in occasions with higher precision requirements. Its appearance color is mostly blue.
WEE Technology Company Limited - WEE are Capacitors Specialist
Industry's lower cost and deliver from stock.
Exceptional long term stability.
Exceeds carton comp MIL-R-11 performance
Standard tolerance: ±2%, ±5%
Variety of packing: Bulk , strip pack. 26mm and 52mm tape and reel, cut and formed
https://www.weetcap.com/Resistors/WEET-CR-Sereis-Carbon-Film-Resistor.html
Featuring consistency and stably-controlled, these carbon film resistors with reasonable prices are widely and largely be used in the electronic, electrical and information industries.
This resistor is a ceramic bar tightly coated with a carbon film which is composed of carbon separately from organic compound through the treatment of high temperature vacuum.
After the carbon coated bar is connected with proper joint and engraved with grooves, its surface is finished with epoxy resin so that the bar is enclosed with a protective film.
Application: all kinds of customer devices.
WEE Technology Company Limited - WEE are Capacitors Specialist
WEET MF Series Metal Film Precision Resistor Features
High precision and low temperature coefficient
Resistance Tolerance: ±0.1%, ±0.25%, ±0.5%, ±1%, ±0.05%,±0.01%,
T.C.R/℃: ±5ppm/℃,±10ppm/℃,±15ppm/℃,±25ppm/℃,±50ppm/℃,±100ppm/℃
Mainly used in the industries of precision instruments, electronic measurement.
https://www.weetcap.com/Resistors/WEET-MF-Series-Metal-Film-Precision-Resistor.html
| WEET MF Series Metal Film Precision Resistor Description | |
| Resistor MF1/4W 2KΩ ±0.05% 25ppm TR | Resistor MF1/8W 2KΩ ±0.05% 25ppm TR |
| Resistor MF1/4W 49.9Ω ±0.1% 25ppm TR | Resistor MF1/8W 49.9Ω ±0.1% 25ppm TR |
| Resistor MF1/4W 1.8KΩ ±0.1% 25ppm TR | Resistor MF1/8W 1.8KΩ ±0.1% 25ppm TR |
| Resistor MF1/4W 10Ω ±0.5% 25ppm TR | Resistor MF1/8W 10Ω ±0.5% 25ppm TR |
| Resistor MF1/4W 100Ω ±1% 25ppm TR | Resistor MF1/8W 100Ω ±1% 25ppm TR |
| Resistor MF1/4W 10KΩ ±0.5% 25ppm TR | Resistor MF1/8W 10KΩ ±0.5% 25ppm TR |
| Resistor MF1/4W 110KΩ ±0.5% 25ppm TR | Resistor MF1/8W 110KΩ ±0.5% 25ppm TR |
| Resistor MF1/4W 121Ω ±0.5% 25ppm TR | Resistor MF1/8W 121Ω ±0.5% 25ppm TR |
| Resistor MF1/4W 143KΩ ±0.5% 25ppm TR | Resistor MF1/8W 143KΩ ±0.5% 25ppm TR |
| Resistor MF1/4W 180Ω ±0.1% 25ppm TR | Resistor MF1/8W 180Ω ±0.1% 25ppm TR |
| Resistor MF1/4W 180Ω ±0.5% 25ppm TR | Resistor MF1/8W 180Ω ±0.5% 25ppm TR |
| Resistor MF1/4W 22.1KΩ ±0.5% 25ppm TR | Resistor MF1/8W 22.1KΩ ±0.5% 25ppm TR |
| Resistor MF1/4W 5.1KΩ ±0.1% 25ppm TR | Resistor MF1/8W 5.1KΩ ±0.1% 25ppm TR |
| Resistor MF1/4W 100Ω ±5% 25ppm TR | Resistor MF1/8W 100Ω ±5% 25ppm TR |
| Resistor MF1/4W 180KΩ ±5% 25ppm TR | Resistor MF1/8W 180KΩ ±5% 25ppm TR |
| Resistor MF1/4W 24Ω ±5% 25ppm TR | Resistor MF1/8W 24Ω ±5% 25ppm TR |
WEE Technology Company Limited - WEE are Capacitors Specialist
WEET SQP Series Audio Grade 20W Axial Cement Ceramic Resistor
Available in 5, 10 and 20 watt versions
Affordable and reliable
Easy to apply on PCB crossovers
High temperature tolerance and resistant to humidity and shock
Small in dimensions, excellent in stability with high tolerance for temperature, humidity and shock
Completely insulated making them highly suitable for PCB crossover application
In the high values the winding cores are replaced by high power handling film
Instant overload capacity, low noise figure and low annual shift in resistance value
Max overload voltage is 2 times of max. working voltage
Power handling film means that decreasing the resistance values compared to models with wound resistance wire.
WEE Technology Company Limited - WEE are Capacitors Specialist
Carbon Film Resistor Structure
Carbon film resistor is a kind of film resistor. It is a resistor formed by depositing a layer of carbon film on the ceramic skeleton from the crystalline carbon decomposed by hydrocarbons under high temperature and vacuum. The resistance is controlled by controlling the thickness of the carbon film and etching the film. The external surface of the resistor is generally coated with green or orange protective paint.
https://www.weetcap.com/Resistors/WEET-CR-Sereis-Carbon-Film-Resistor.html
WEE Technology Company Limited - WEE are Capacitors Specialist
Metal film resistor is a resistor that sprays a metal film onto a ceramic substrate and then cuts it into a spiral. SMD metal film precision resistor (full English name: Metal Film Precision Resistor), that is, metal film resistor is also called wafer resistor in China due to its cylindrical shape without leads. The length, thickness and width of the metal helix determine the precise resistance value. Metal film resistors provide more accurate resistance values than other types of film resistors (carbon film resistors). Like carbon film resistors, metal film resistors are little affected by temperature changes and aging. They also make little noise inside. In terms of overall performance, metal film resistor is the best type, followed by carbon film resistor, followed by carbon composite resistor.
https://www.weetcap.com/pdf/WEET-MF-Sereis-Metal-Film-Precision-Resistor.pdf
WEE Technology Company Limited - WEE are Capacitors Specialist
Wire wound resistors are made by winding the resistance wire non-corrosive, heat-proof and humidity-proof material.
Delivery from stock in bulk taped, and strip pack.
Exceptional long-term stabiligy
Standard tolerance：± 1%, ± 2%, ± 5%
https://www.weetcap.com/Resistors/WEET-KNP-KNS-Series-Wire-Wound-Resistor.html
| Power Rating 70℃ | KNP-1/2W | KNP-1W | KNP-2W | KNP-3W | KNP-4W | KNP-5W | KNP-7W | KNP-8W | KNP-10W |
| Series Number | KNS-1W | KNS-2W | KNS-3W | KNS-4W | KNS-5W | KNS-7W | KNS-10W | - | - |
| Operating Temp. Range | -55℃~ +155℃ | ||||||||
| Dielectric Withstanding Voltage(AC) | 500V | 500V | 500V | 500V | 500V | 500V | 500V | 800V | 1000V |
| Value Range ±5% | 0.1Ω-300Ω | 0.1Ω-499Ω | 0.1Ω-1.5KΩ | 0.1Ω-1.5KΩ | 0.1Ω-1.5KΩ | 0.5Ω-3KΩ | 0.5Ω-3KΩ | 1Ω-3KΩ | 1Ω-3KΩ |
| Temp. Coefficient (by Type) | ±350ppm/℃ | ||||||||
WEET Hand Made Cement Ceramic Resisotrs SQM SQP and SQZ Non-Flammable and Heat Resistant Audio Grade
WEE Technology Company Limited - WEE are Capacitors Specialist
Cement ceramic resistor is a resistor sealed with refractory mud (commonly known as cement, actually not cement).
The outer side of the cement resistance is mainly made of ceramic materials (generally divided into high alumina porcelain and feldspar porcelain).
Cement Resistors Characteristic:
1. Shock resistance, moisture resistance, heat resistance, good heat dissipation, low price and other characteristics.
2. Fully insulated, suitable for printed circuit boards.
3. The wire is wound on the porcelain rod and then the joint is welded to make the accurate resistance value and prolong the service life.
4. The high resistance value is made of metal oxide film (MO) instead of winding.
5. Excellent heat resistance, low resistance temperature coefficient, linear change.
6. Resistance to short-time overload, low noise, resistance value has no change over the years.
7. Good explosion-proof performance and protection.
https://www.musicaps.com/product/WEET-SQM-Series-Radial-Cement-Ceramic-Resistor.html
