Passive Components Savol Direct Supply 2ws 0.33r 1% Metal Film Resistor

Min.Order: 1,000

Product origin: Dongguan, Guangdong, China

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US$ 0.026 ~ 0.05

Description

Savol 2WS 1% 0.33ohm Metal Film Precison Fixed Resistor

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 :

High stability.
Low noise, Low temp.coefficient.
Precision characteristics.
Can Offering Non-inductive.
Major Parameters
Resistance Range:0.1Ω~100MΩ
Rated Power:1/6W~5W
Tolerance : ±0.01%, ±1% ,±2% ,±5%
Temperature Coefficient: ±5 PPM/ºC ~ ±300PPM/ºC.

1. What about your product quality?

Our company had passed ISO certificates and with ROHS standards.

2. How long is the quality guarantee period?

Our quality can be assurance,One year warranty.

3.How about the MOQ/Minimum Order Quantity?

For your trial order ,MOQ can accept be ordered according to by MPQ or can be negotiate.Please contact us for more detail.

4.Can you provide samples?

We can provide samples, common specifications, if there is stock, we can also provide free samples, but the customer needs to pay the freight cost. For customized products, we need to charge a part of the fee. After customers place orders, we can return a part of the sample fee according to the situation.

5.How long is the delivery time?

Normally,3-7 working days after the payment received. For big bulk order, need be negotiate.2.How do you deliver the goods?

6.How do you deliver the goods?

We can ship to you by UPS/DHL/TNT/EMS/FedEx/ by sea or others,Choose by clients. For the Countries & Regions where EMS cannot deliver, please choose other shipping ways. We are not responsible for any accidents, delays or other issues caused by the forwarder. Any import fees or charges are on the buyer's account. When orders or partial orders ship, an email with the shipping details will be sent.

7.What are the ports near you?

HongKong port and YanTian port are near from us.

8.How to pay?

We accept AliBaba Trade Assurance / Wire Transfer or T/T / Western Union / PayPal or can be negotiable if other payment method need. By the way, we won't change our payment account number halfway. Please confirm clear with our relevant personnel before arrange payment.

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