Electrical Resistor

Picture	Manufacturer No.	Shape	Rated Power	Description	Datasheet	Order
	FBRES-01	Disc-shaped	0.25W	Environmental protection ZOV varistor 7D561K 560V plug-in varistor		Send Order
	FBRES-02	Disc-shaped	0.25W	Blue in-line varistor diameter 7mm 07D-270K anti-surge and lightning protection varistor		Send Order
	FBRES-03	Disc-shaped	0.25W	Varistor 10D561K 560V Accuracy ±10% Overvoltage protection type resistor		Send Order
	FBRES-04	Disc-shaped	0.25W	OV full range of varistor 470V diameter 20mm 20D-471K lightning protection varistor		Send Order
	FBRES-05	Disc-shaped	0.5W	ZOV blue varistor 5D471k diameter 5mm 470V high quality varistor		Send Order
	FBRES-06	Disc-shaped	0.25W	ZOV varistor 750V diameter 7mm 7D-751K in-line surge absorber resistor		Send Order
	FBRES-07	Disc-shaped	0.5W	ZOV varistor 10D221K 220V diameter 10mm in-line resistance		Send Order
	FBRES-08	Disc-shaped	0.05W	Environmental protection lead-free ZOV varistor voltage 820V 07D-821K lightning protection in-line varistor		Send Order
	FBRES-09	Disc-shaped	0.25W	ZOV In-line Varistor Diameter 20mm 680V Environmental Protection Lightning Protection Varistor		Send Order
	FBRES-10	Disc-shaped	0.05W	ZOV plug-in varistor 5D270K 270V diameter 5mm		Send Order
	FBRES-11	Flat sheet	0.125W	Negative temperature coefficient thermistor 5D-9 diameter 9mm special sensitive resistor for induction cooker		Send Order
	FBRES-12	Flat sheet	0.125W	NTC in-line thermistor 10D-9 negative temperature thermistor, small size, high power, special for refrigerator power supply		Send Order
	FBRES-13	Flat sheet	0.125W	Plug-in thermistor 10D-7 Negative temperature coefficient diameter 7mm PTC thermistor		Send Order
	FBRES-14	Disc-shaped	0.125W	Negative temperature NTC thermistor 5D15 thermistor		Send Order
	FBRES-15	Flat sheet	0.125W	Power type NTC negative temperature coefficient thermistor diameter 5mm 20D-5 temperature sensor		Send Order
	FBRES-16	Flat sheet	0.125W	High current power NTC thermistor 10D-20 surge current suppression resistor		Send Order
	FBRES-17	Flat sheet	0.125W	NTC 20D-11 plug-in thermistor Commonly used resistance for soymilk machine to suppress surge		Send Order
	FBRES-18	Flat sheet	0.125W	Power NTC pseudo surge current 16D-15 negative temperature coefficient thermistor		Send Order
	FBRES-19	Flat sheet	0.125W	NTC 12D-7 negative temperature coefficient thermistor 12R diameter 7mm inverter welding machine maintenance		Send Order
	FBRES-20	Flat sheet	0.125W	NTC thermistor 33D-7 power type 7mm diameter protection circuit anti-surge current		Send Order
	FBRES-21	Cylindrical	1W	Color ring metal film resistance 1W 1% 1K/2K/4K3/5K1/10K/20K metal film resistance plug-in		Send Order
	FBRES-22	Cylindrical	0.25W	Metal film precision resistor 1/4W 1% 1.2K/2.2K/3.3K/4.3K/5.6K plug-in resistor		Send Order
	FBRES-23	Cylindrical	3W	3W metal film resistor 1% 1K/2K/3K/4K3/5K1/10K/30K/43K in-line resistor metal film		Send Order
	FBRES-24	Cylindrical	2W	2W metal film resistor 1% 1R/2R/3R/4R3/5R6/6R2/10R/20R color ring metal film resistor		Send Order
	FBRES-25	Cylindrical	0.5W	Metal film plug-in resistance 1/2W 0.5W accuracy 1% 120R/200R/300R/430R/750R		Send Order
	FBRES-26	Cylindrical	3W	3W metal film resistor 1% 30R/43R/51R/62R/82R/200R five-color ring metal film resistor		Send Order
	FBRES-27	Cylindrical	5W	5W carbon film resistor bulk 5% 1R/2R/3R/4R3/5R6/7R5/10R/20R four-color ring carbon film resistor		Send Order
	FBRES-28	Cylindrical	5W	Carbon film resistor 5W bulk 5% 1K/2K/3K/5K1/6K2/20K/30K/43K in-line color ring resistor		Send Order
	FBRES-29	Cylindrical	2W	2W carbon film resistor 5% 1R-10M full range of resistance		Send Order
	FBRES-30	Cylindrical	0.25W	Carbon film resistor 1/4W accuracy 5% 1R-10M bulk braided carbon film resistor total resistance		Send Order
	FBRES-31	Cylindrical	3W	Carbon film resistor 3W accuracy 5% 1R-5.1M bulk taping supply Oxide film resistor		Send Order
	FBRES-32	Cylindrical	0.5W	1/2W carbon film resistor 5% 1R-4.7M full range of resistance		Send Order
	FBRES-33	Cylindrical	1W	Carbon film resistor 1W accuracy 5% 0.1R-10M in-line color ring carbon film resistor		Send Order
	FBRES-34	Cylindrical	0.125W	Carbon film resistor 1/8W 1/6W accuracy 5% 1R-4.7M total resistance		Send Order
	FBRES-35	Trapezoidal	100W	500W total resistance value inverter brake brake resistance trapezoidal aluminum shell resistance		Send Order
	FBRES-36	Trapezoidal	600-1000W	600W-10000W Trapezoidal aluminum alloy case inverter brake brake resistance		Send Order
	FBRES-37	Tube	10-300W	Inverter ripple brake brake resistance 10W-300W green painted power resistance		Send Order
	FBRES-38	Tube	400-6000W	Ripple load brake variable frequency brake resistor 400W-6000W high power winding resistor		Send Order
	FBRES-39	Cylindrical	0.25W	Negative temperature temperature measurement type 20K ±5% B value 3950 small blackhead thermistor		Send Order
	FBRES-40	Disc-shaped	0.05W	Glass-sealed thermistor 50KR ±1% B value 3950 electric fan for microwave oven		Send Order
	FBRES-41	Cylindrical	0.25W	Temperature sensor probe 68KE ±5% B value 3950K thermistor		Send Order
	FBRES-42	Disc-shaped	/	Varistor 25D821K diameter 25 10% surge suppressor lightning protection resistance 820V		Send Order
	FBRES-43	Disc-shaped	/	20mm diameter plug-in varistor ZOV 20D-241K surge absorber		Send Order
	FBRES-44	Flat sheet	1W	Zov zinc oxide varistor 05D-561K in-line varistor lightning protection		Send Order
	FBRES-45	Disc-shaped	/	In-line ZOV varistor diameter 7mm 07D-680K 68V anti-surge lightning protection varistor		Send Order

• What is a Resistor and What is its Circuit Symbol?

  A resistor is an electrical component that restricts the flow of electrical current in a circuit. The analogy often used to explain its operation is to consider current as water flowing in a hosepipe; a resistor can be considered as a constriction in the pipe that limits the flow of water.
  
  Most people will be familiar with Ohm’s law: V=IR. V is the voltage across a resistor, I is the current flowing in the resistor, and R is the resistance. This is the equation that connects current, voltage and resistance and is the basis of working with resistors (and other passive components).
  
  At a microscopic level, resistors are made from a variety of materials that are conductors, but not perfect ones, so the ability for electrons to flow is impeded by the atomic structure of the materials chosen. By varying the conductor’s characteristics such as the material’s conductivity, the surface area and the lengths of the material used, it is possible to control the resistance to the desired accuracy. Resistance is measured in Ohms, and the symbol for the unit is Ω.

  
  

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  Standard for Resistance Value
  The resistors we choose in circuit design follow certain standards, mainly for the convenience of production and design. We cannot randomly select a resistor, such as 5.28 Ω.
  It's not that we can't produce it, but doing so will lead to scattered market demand and a tendency towards customization, making it impossible to manufacture and supply in large quantities.
  Therefore, the international IEC has established a standard for resistance values and tolerances.
  
  Pay attention to the following three points
  Different precision resistors correspond to different precision series. The E12 series typically has a 10% accuracy, the E24 series has 2% and 5% accuracy, the E96 series has 1% accuracy, and the E192 series has 0.1%, 0.25%, and 0.5% accuracy.
  The numbers in the series name represent how many standard resistance values the series has, usually multiples of 6. For example, the E12 series has 12 different resistance values, and the E192 series has 192 different resistance values. The resistance values of each series are approximately a proportional sequence, with a common ratio to the power of 10 and a cardinality of 10 Ω. For example, the common ratio of E12 series is 10 to the power of 12, while the common ratio of E96 series is 10 to the power of 96.
  Those interested can count according to the above table to determine if the above pattern is true.
  

• Resistance marking

  The most commonly selected resistors in our design are surface mount resistors with precision of 5% and 1%. Generally, resistors with 0603 and above will have corresponding resistance values marked in their packaging. We can first understand the significance of these markings.

  
  

  E24 series (5% accuracy)

  For resistance values greater than 10 Ω, a 3-digit number is usually used to represent the resistance value. The first two represent the base of the resistance value, and the last digit represents the power of multiplying by 10.

  
  

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• China Leading industry of Resistors Components

  FBelec is a leading manufacturer of Resistors and electronic component, has more than 25 years of experience. Our superior production capabilities, strict quality management system, and after sales service help you create an impact in your target market.Precision resistor, military standard, high precision low temperature coefficient, corrosion resistance, wear resistance, high temperature resistance ISO9001 management system complies with RoHS EU directive, high performance and low price, suitable for precision electronic instruments and meters, etc

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• For example, marking 100 represents 10 Ω instead of 100 Ω, and 472 represents 4.7k Ω. Less than 10 Ω is usually represented by R as the decimal point, for example, 2R0 represents 2 Ω.

  
  

  E96 series (1% accuracy)

  The E96 series is usually represented by two digits followed by a letter. The two digits represent the resistance value of the E96 series, and the letter represents the power of multiplying by 10, where Y represents -1, X represents 0, A represents 1, B represents 2, C represents 3, and so on.

  We need to mention marking the resistance meter here. I took a screenshot for distance measurement:

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  For example, 47C, counting from the table to 47 resistance values, is 30.1. C represents multiplying by 10 to the power of 3, which is 30.1k Ω.

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  The above is the way to identify the resistance value of surface mount resistors. For resistors packaged with axial leads, also known as direct insertion resistors, they use the color ring on the resistor to identify the resistance value. Therefore, we also call them color ring resistors. At present, except for some high-power areas that require the use of color ring resistors, with the continuous increase of circuit density, color ring resistors are rarely seen on the market.

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  Selection of Resistors
  Selection, in simple terms, refers to extracting key parameters based on the device specifications and determining whether they meet the requirements of the application.
  Firstly, we need to choose the type of resistor based on the application scenario. For common consumer miniaturized products, we will definitely focus on thick film resistors and metal film resistors, which are mainly chip resistors.
  If our resistors are used for current sensing, remember to choose alloy resistors and select the power based on the maximum current and continuous current. Currently, this type of alloy resistor can achieve a level of 5W.
  Secondly, the selection of all resistors requires calculating the power of the resistor based on the current, in order to lock the package, and there must be a derating design.
  Packaging is not only determined by power, but many scenarios are also related to our product. For example, if our product needs maintenance, we should choose resistors with larger packaging.
  Finally, don't forget the withstand voltage of the resistor. Don't think that the resistor doesn't have a withstand voltage. If the circuit involves a voltage of 220V or even higher, you can't just connect a 1MR 0402 resistor in series in the middle of the high voltage and think it's okay. Be sure to pay attention to the withstand voltage of the small package resistor.