☑ How To Read Thick Film Resistors

They are easily integrated into a heatsinkable package for high wattage application. The resistive value of the resistor is controlled by increasing the desired thickness of the deposited film giving them the names of either thick film resistors or thin film resistors.

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By comparison thick film resistors can be up to 1000 times thicker usually around 100 microns.

How to read thick film resistors. Thick film resistors when first manufactured had tolerances of 5 but standard tolerances have improved to 2 or 1 in the last few decades. In most literature referrals to metal film usually it is a cylindrical axial resistor. Filter by click and drag or ctrl click to select multiple items.

Metal film resistors have a thin metal layer as resistive element on a non conducting body. Thick film chip resistors are made of a thick film resistive layer printed onto a ceramic substrate. A 40 kelvin 70 0f temperature change can change the resistance by 1.

Thin film resistors are made by sputtering a method of vacuum deposition the resistive material onto an insulating substrate. The resistive element is protected by an epoxy overcoat layer. Other film type resistors are carbon film and thick and thin film resistors.

Thick film resistors are produced by firing a special paste onto the substrate. They are amongst the most common types of axial resistors. Thin film is more accurate has a better temperature coefficient and is more stable.

The paste is a mixture of glass and metal oxides. The thick film resistive layer is a mixture of metal oxides. Click the buttons to sort and filter the table.

Surface mount chip resistors have electroplated tin sn outer terminations for board soldering. The resistive element of thick films is 1000 times thicker than thin films but the principal difference is how the film is applied to the cylinder axial resistors or the surface smd resistors. Sort toggles between ascending descending and off.

The principle difference between thick and thin film resistors is the thickness of this resistive layer with thin films possessing a thickness of around 01 microns. Thin film resistors have a metallic film that is vacuum deposited on an insulating substrate. High values can be obtained and high voltage can be applied to thick film products with little change in resistance value.

We offer over 20 different series in thick film construction. On a custom job it is possible to use multiple pastes with widely varying sheet resistivity so that almost any resistance value can be accommodated each in nearly the same small area. Thick film parts can be chosen based on mounting application and voltage range.

Once deposited a laser is used to cut a high precision spiral helix groove type pattern into this film. All 430 rows shown. Sheet resistance of thick film resistors can be much higher than thin films from 20 ohms per square up to 500k ohms per square.

Temperature coefficients of thick film resistors are high typically 200 or 250 ppmk.

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