47 K Ω 1/4 W 47 K metal film resistor 47 kΩ 0.25 W 50 Pieces

Product Specifications

• Brand: DSSRQI
• Type: Permanent Resistor
• Condition: New
• Technology: Metal film
• Rating: 47Kohm 1 / 4w
• Mounting type: Through hole
• Resistance: 47kohm
• Resistance tolerance: 1%
• Rated Power: 1 / 4w
• Temperature coefficient: ± 100PPM / ° C
• Operating temperature: -55 ° C ~ 155 ° C
• Color: Blue
• Included in this package: 50 Pieces of Resistors

NGN 970.00

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Metal film resistors essentials

As the name implies, metal film resistors use a thin film of a metal piece to give the resistive component. These resistors give a brilliant level of efficiency and are presently one of the favored sorts for axial leaded resistors.

Albeit generally utilized for axial leaded parts, surface mount resistor likewise utilize a similar fundamental innovation, however on a rectangular flat piece instead of a round and hollow body. However the term metal film resistor regularly alludes to the axial leaded part as opposed to the surface mount gadget as this is ordinarily alluded to as a surface mount resistor.

How they are manufactured

Metal film resistors are made as fixed resistance leaded resistors, despite the fact that as already stated in the above paragraph, a similar essential innovation is utilized for surface mount resistors.  Ceramic bar is used as the base for the resistor. This bar is of high quality so contaminants don't contaminates the metal and cause ageing thereby leading to a change in the resistance value or rating later in the life of the resistor.

A thin layer of a metal or resistance material is stored onto the bar utilizing a technological method known as vacuum deposition. Examples of metals used include but not limited to Nickel chromium, or once in a while tin, antimony, tantalum nitride or even gold with antimony might be utilized.

The thickness of the resistive metal film inside the ceramic rod is commonly around 50 to 250 nanometer (nm). The resistance value is a function of the thickness of the metal film. The thickness represents the resistance, the thicker layers giving lower resistance. The thickness likewise influences the stability of the device - thicker layers give a superior long stability figure.

To make the required resistance a helical cut is made in the metal film, viably stretching the metallic conductor and furthermore making the conduction path smaller. Along these lines the resistance is expanded. This is for the most part done utilizing lasers to make extremely precise cutting of the metal film. Once the fundamental component is made, caps are pushed onto the closures to interface with the conductor so wire connections can be done.

Once the above steps are complete, the entire resistor is secured with defensive layers and are baked. These give insurance against mechanical harm and dampness or contaminant entrance. They likewise have a high electrical quality, giving protection from the outside.

Metal film resistor qualities 

The metal film resistors are of different specifications. Common specifications may include:

• Tolerance ranges available: 0.1, 0.25, 0.5, 1 and 2%.
• Temperature coefficient of resistance: 50 and 100 ppm/°C
• Maximum operating temperature: 250 - 300°C