| Customization: | Available |
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| Resistance: | Fixed Resistor |
| Function for Resistance: | Protective Resistor, Load Resistor, Shunt Resistor |
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1w 2w 3w 5w precision resistor 1% Tolerance metal film resistor MF resistance
Product Description
Metal film resistors have a thin metal layer as resistive element on a non-conducting body. They are amongst the most common types of axial resistors. Other film type resistors are carbon film and thick and thin film resistors. In most literature referrals to metal film, usually it is a cylindrical axial resistor. However, thin film chip resistors use the same manufacturing principle for the metal layer. The appearance of metal film resistors is similar to carbon film resistors, but their properties for stability, accuracy and reliability are considerably better.
Metal film resistors are axial resistors with a thin metal film as resistive element. The thin film is deposited on usually a ceramic body.
Construction:
The resistive element is a thin metal layer that is usually sputtered (vacuum deposition) on a cylindrical high purity ceramic core. Sometimes other techniques than sputtering are used. The deposited metal is artificially aged by keeping it for a long period at a low temperature. This results in a better accuracy of the resistor. The resistance material is often nickel chromium (NiCr), but for special applications also other alloys are used such as tin and antimony, gold with platinum and tantalum nitride. The stability and resistance are strongly dependent on the thickness of the metal film (50-250 nm). A larger thickness of the layer results in a better stability and a lower resistance value. On both ends a metal cover is pressed with the connection leads. After this, the desired resistance is achieved by cutting a spiral shaped slot in the thin metal layer. This is usually done by lasers, while in the past sandblasting and grinding techniques were used. Carbon film resistors use the same technique to trim the resistance. The resistor is covered with several coating layers that are baked individually. The coating protects against moisture and mechanical stresses and preferably has a high dielectric strength. The resistor value is marked by color code bands or with text. The metal film resistors are available with tolerances of 0.1, 0.25, 0.5, 1 and 2%. The Temperature Coefficient of Resistance is usually between 50 and 100 ppm/K.
Typical applications:
Metal film resistors are precise and functional resistors, suitable for applications on precise electronic circuits, have good characteristics for tolerance, stability and TCR. Furthermore, the resistors feature low noise properties and a high linearity because of a low voltage coefficient. Therefore, in circuits where tight tolerance, low temperature coefficient and low noise properties are important, often metal film resistors are used. Examples of applications are active filters or bridge circuits.
Reliability of metal film resistors:
For a good reliability, metal film resistors are normally operated between 20 and 80 percent of their specified power rating. Reliability is generally increased by derating 50%. However, in very specific situations, at lower than 20% of the power rating in a humid environment the reliability decreases. Compared to wirewound or carbon composition resistors, these resistors are easier damaged by voltage surges and power overloads.
Features of Savol Metal Film Fixed Resistors :
t Resistant 2000w Adjustable Wirewound Resis
Main Resistors We Produce:
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Items |
Product Name |
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1 |
Carbon Film Fixed Resistors |
|
2 |
Cement Resistors |
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3 |
Color Code Inductors |
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4 |
Gold Aluminum Housed Wirewound Resistors |
|
5 |
High Power Ceramic Tube Wirewound Resistors |
|
6 |
High Voltage Glaze Resistors |
|
7 |
Ignition Resistor |
|
8 |
Metal Film Fixed Resistors |
|
9 |
Metal Film Fuse Resistors |
|
10 |
Metal Oxide Film Fixed Resistors |
|
11 |
Metal Plate Noninductive Cement Resistors |
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12 |
Milliohm Resistors |
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13 |
Power Cabinet |
|
14 |
SMD MELF Resistors |
|
15 |
SMD Shunt Resistor |
|
16 |
SMD Wire Wound Round Resistor |
|
17 |
TO-220 Power Resistor |
|
18 |
Trapezium Aluminum Housed Wire-wound Resistors |
|
19 |
Wirewound Fixed Resistors |
|
20 |
Wirewound Fuse Resistors |
Company Profile
Established in 2006,Dongguan Savol Electronics co., LTD. is a manufacturer that specializing in R&D, Production and Sales of resistor products.
Savol Electronics produces many series resistors, such as Carbon Film Fixed Resistors, Cement Resistors, Color Code Inductors, Gold Aluminum Housed Wire wound Resistors, High Power Ceramic Tube Wire wound Resistors, High Voltage Glaze Resistors, Ignition Resistor, Metal Film Fixed Resistors, Metal Film Fuse Resistors, Metal Oxide Film Fixed Resistor, Metal Plate Non- inductive Cement Resistors, Milli ohm Resistors, Power Cabinet, SMD MELF Resistors, SMD Shunt Resistor, SMD Wire Wound Round Resistor, TO-220 Power Resistor, Trapezium Aluminum Housed Wire-wound Resistors, Wire Wound Fixed Resistors, Wire Wound Fuse Resistors, Braking Resistors ect.
Located in Shijie Town, the important town of Dongguan's electronics industry, China, our factory is close to the railway station and subway, Shenzhen Yantian port and Hong Kong port as well.
Savol Electronics has passed ISO certification and the products strictly meet the ROHS standards. The resistors we produce are widely applied in Automotive Industry, Power Supply Industry,LED Lighting, Home Appliances, Communication Equipment, Toys, Medical Equipment Industry, Charging pile field Instrumentation Industries ect. Adhere to the purpose of technological innovation, integrity management, customer satisfaction, our products are sold worldwide and we have established good cooperative relations with many valuable clients, which have been cooperating with us for more than 10 years.
Q1. What about your product quality?
A: Our company is ISO certificated and products are ROHS compliant.
Q2. How long is the quality guarantee period?
A: All Products are with one natural year's warranty.
Q3.How about the MOQ/Minimum Order Quantity?
A: For trial order, MOQ is generally subject to MPQ of our resistors or can be negotiable.Please contact us for more detail.
Q4. Can you provide samples?
A: We can provide samples with standard specifications; Free samples are also acceptable if they are in stock and freight cost should be bared by the customers. For customized products, we may need to charge a part of fee, which can be returned after orders are placed.
Q5. How long is the delivery time?
A: Normally, 3-7 working days after the payment is received. For bulk order, lead time can be negotiable.
Q6.How do you deliver the goods?
A: Goods can be shipped via UPS/DHL/TNT/EMS/FedEx/ by air or by sea or even as per requirement of customers. For the Countries & Regions where EMS cannot reach, please choose other shipping ways. We are not responsible for any accidents, delays or other issues caused by the shipping agencies.Any import fees or charges are on the buyer's account. When orders or partial orders are shipped out, an email with the shipping details will be sent.
Q7.What are the ports near you?
A: HongKong port and YanTian port ect.
Q8.How to pay?
A: We accept AliBaba Trade Assurance; Wire Transfer; T/T / Western Unio and PayPal ect. Other payment terms can also be negotiable. In a rule, we will not change our payment account halfway, in that case, please confirm clearly with our relevant personnel before arrange a payment.
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