Oct 09, 2023
Murata Manufacturing Co., Ltd. is the world's leading manufacturer of electronic components. Its main product is ceramic capacitors, ranking first in the world. This article will introduce Murata capacitor products and their characteristics in detail. For information on Murata capacitor product prices, specifications, and technical manuals, you can consult Galaxy Core Technology Co., Ltd., a professional agent for Murata series products.
1. Murata Capacitor’s main products
Murata capacitors are generally divided into four categories: chip capacitors, electrolytic capacitors, trimmer capacitors, and variable capacitors.
Murata monolithic ceramic capacitors (chip capacitors)
Murata monolithic ceramic capacitors, commonly known as chip capacitors, are commonly used components that are currently used in large quantities. In terms of chip capacitors produced by Murata, there are different specifications such as NPO, X7R, Z5U, Y5V, etc. Different specifications have different uses. . The following only introduces the performance and applications of the commonly used NPO, X7R, Z5U and Y5V, as well as the ordering matters that should be paid attention to during procurement. The main difference between NPO, Just different. Therefore, when using capacitors, different capacitors should be selected according to their different functions in the circuit.
NPO capacitor: NPO is one of the most commonly used monolithic ceramic capacitors with temperature compensation characteristics. Its filling medium is composed of rubidium, samarium and some other rare oxides. NPO capacitors are among the most stable in capacitance and dielectric loss. The capacity change is 0 when the temperature is from -55℃ to +125℃. X7R capacitors: Y5V capacitor: The normal operating temperature range of Y5V is -30℃～+85℃, and the corresponding capacitance change is +22～-82%; while the normal operating temperature range of Z5U is +10℃～+85℃, the corresponding capacitance change is It is +22~-56%.
Murata Polymer Aluminum Electrolytic Capacitors
Murata polymer aluminum electrolytic capacitors feature low ESR, low impedance, and large capacity. In addition, the electrostatic capacitance has no DC bias characteristics and the temperature characteristics are also very stable. Therefore, it is very suitable for smoothing the input and output currents of various circuits, and can be used as a backup device when the load of the CPU peripheral equipment changes. This will help reduce component count and board space.
Murata Trimmer Capacitor
The working principle of Murata trimmer capacitor: Trimmer capacitor is a semi-fixed adjustable capacitor, and its electrostatic capacity can be changed freely. Generally speaking, once set, there is basically no need to change it. Compared with ordinary capacitors, trimmer capacitors have the added function of adjusting electrostatic capacity. There are three main principles: However, most of the products made use the first method.
Method 1: Change the electrode overlap area;
Method 2: Change the distance between overlapping electrodes;
Method 3: Change the relative dielectric constant of the dielectric.
Specific implementation of method one: One electrode sandwiched between the dielectric is fixed, and the other electrode is made into a variable electrode. Changes in the overlapping area of the two electrodes (opposite electrode area) can change the electrostatic capacity. Through this method, the rotation angle of the variable electrode is basically proportional, and the purpose of changing the electrostatic capacity (linear change) can be achieved. Murata's trimmer capacitor adopts the first method and has achieved more than 50% of the global market share.
Murata trimmer capacitor product series: Among the manufacturers of electronic components, Murata, the largest company in the field of trimmer capacitors, is also second to none in the industry. Its trimming capacitor product series mainly include:
TZB4 series: overall size 4.0ｘ4.5ｘ3.0mm, resin rectangular outline, SMD type ceramic trimmer capacitor. A product lineup with 8 types of capacitance values, including reflow soldering, film-coated type, and wave soldering.
TZC3 series: overall dimensions are 3.2ｘ4.5ｘ1.6ｍｍ, and the colored stator is made of SMD type ceramic trimmer capacitors. The product lineup includes five types of capacitance values, which can be easily identified by color.
TZR1 series: with dimensions of 1.5ｘ1.7ｘ0.85ｍｍ, it is the world’s smallest resin-free SMD ceramic trimmer capacitor. The product lineup has four types of electrostatic capacity values. It has a resin-free structure and excellent solder heat resistance. It can still demonstrate excellent stability after reflow soldering. Due to the small size of the product, it is difficult to produce products with high electrostatic capacity values. However, using Murata's own laminated ceramic technology, products as high as 8pF have been produced.
TZW4 series: Overall size 4.2ｘ5.2ｘ2.6ｍｍResin-free SMD ceramic trimmer capacitor. Withstand voltage up to 550VDC, suitable for high frequency circuits. In conjunction with high-frequency circuits, there are two product lineups with low capacitance values, 1.0pF and 1.5pF. Most suitable for impedance matching of transmit power amplifiers in mobile communication base stations.
TZY2 series: Resin-free SMD ceramic trimmer capacitors with dimensions of 2.5ｘ3.2ｘ1.25ｍｍ. The most popular form factors for trimmer capacitors. There are 8 product lineups with various electrostatic capacity values, covering different needs from low frequency to high frequency. Resin-free structure, excellent solder heat resistance, and good stability after reflow soldering.
Murata Supercapacitor (EDLC)
Murata's supercapacitor (EDLC: Electrical Double Layer Capacitor, also known as electrical double layer capacitor) has high power density compared with traditional supercapacitor products. Although it is small in size, it can quickly and effectively respond to large energy inputs. with output. Based on the technology introduced by Australia's CAP-XX company, the material and structural design are optimized to achieve miniaturization and low ESR. It is used for battery equipment and small power supplies with limited output, and can achieve miniaturization, high power, and high performance (high output performance such as LED Flash).
Structure of Murata Supercapacitor: Supercapacitor (EDLC: Electric Double Layer Capacitor) refers to a capacitor that has no dielectric like ceramic capacitors and electrolytic capacitors. Instead, it uses the state of an electrical double layer (electric double layer) formed at the interface between a solid (electrode) and a liquid (electrolyte) to replace the dielectric.
A supercapacitor is composed of electrodes, an electrolyte (containing electrolyte salts), and a separator (to prevent contact between the positive and negative electrodes). The electrode is constructed with a current collector coated with activated carbon powder. The electrical double layer is the interface formed by the contact between each activated carbon powder and the electrolyte. When charging a supercapacitor, the positive electrode is composed of negative ions and holes, and the negative electrode is composed of negative ions and electrons arranged across the interface. This arrangement of ions and electrons (holes) is called an electrical double layer. This is formed by the physical movement of ions, so it is not accompanied by chemical reactions like in batteries. Therefore, supercapacitors have superior charge and discharge cycle characteristics. The use of activated carbon in the electrode is responsible for the expansion of the electrode surface area. There are tiny pores on the surface of activated carbon, so the surface area increases. The larger the surface area, the more electricity can be stored, so the supercapacitor achieves a very high electrostatic capacity. This is the laminated type of Murata supercapacitor
The main advantages of Murata supercapacitors:
(1) Small and ultra-thin package (LWT: 14.0mm×21.0mm×3.2mm～)
(2) Low ESR! ! High output voltage and high electrostatic capacity (DMF series example: 45mΩ, 55V, 470mF) Compared with batteries and general supercapacitors, it can achieve large current and high output input and output.
(3) Optimized charge and discharge cycle life. Since there is no charging and discharging structure accompanied by chemical reactions, it can be charged and discharged more than 100,000 times.
(4) It is suitable for high-reliability, high-confidential packaging and electrochemical systems. Compared with other supercapacitors, it strictly controls the possibility of characteristic degradation.
Murata variable capacitor
A variable capacitor changes the capacitance value by applying a voltage to the terminals. The main models of Murata variable capacitors are: LXRW19V300-020, LXRW19V600-029.
The main uses of Murata variable capacitors are:
(1) The capacitor can be variable by adjusting the tuning voltage;
(2) FeliCa (NFC) can be used as a device for frequency adjustment like a switching integrated circuit (capacitor embedded type) or a trimmer capacitor. Of course, it can be used in various other situations.
Murata variable capacitor product name meaning: For example, model: LXRW 19 V 600–020
LXRW: represents variable capacitance; 19: represents size; V: control code; 600: capacitance; 020: packaging method.
Murata Single Layer Microchip Capacitors
Features of Murata single-layer microchip capacitors: Murata single-layer microchip capacitors are made of a single-layer structure using smooth and precise ceramic materials and gold electrodes, so their reliability and frequency characteristics are excellent. Product series starting from ultra-small 0.25mm, suitable for circuit miniaturization and high-density packaging. Due to the use of gold electrodes, AuSn is used for chip bonding and gold wire is used for wire bonding. For better installation and usage performance, AuSn can be coated on one or both sides.
Purpose of Murata single-layer microchip capacitors: Murata single-layer microchip capacitors are used in various microwave integrated circuits (amplifiers, transmitters, mixers, control circuits, etc.) optical communication equipment, mobile communication equipment, and measuring instruments.
Murata's high heat-resistant film capacitors for automotive use
Film capacitors currently widely used in automotive applications generally guarantee temperatures below 105°C. Although high heat-resistant film capacitors have been available for a long time, there are concerns that the self-recovery function is difficult to operate under high temperatures and short-circuit failure may occur.
Murata's high heat-resistant film capacitors (FH series) can be used continuously at 125°C. In addition, it has a self-recovery function in high-temperature areas, making it ideal for smoothing applications in converters for eco-friendly vehicles and inverters for motor drives that require high-temperature guarantees. Murata's high heat-resistant automotive film capacitors are used in smoothing capacitors for hybrid vehicles and electric vehicles that require high heat resistance and safety requirements, as well as in converters for motor drives and converters.
2. Product name representation of Murata capacitors
Product model: GRM 18 8 R7 1C 225 K E15 D, including:
GRM: stands for tin-plated electrode product (ordinary chip ceramic capacitor). The commonly used Murata capacitors are GRM ordinary chip ceramic capacitors and GNM ordinary chip arrays.
18: Indicates the size (length*width) (1.6*0.8mm). The common domestic size is (length*width) 1.6*0.8mm (unit is mm). The internationally accepted size representation is inch 0603 (unit is inch). Murata's commonly used codes are 03, 15, 18, 21, 31, 32, 42, 43, 55, etc.
8: Indicates thickness (T) (0.8mm). Commonly used Murata codes for thickness include 5, 6, 8, 9, B, C, E, etc. The specific corresponding values are as follows: 5-0.5mm; 6-0.6mm; 8- 0.8mm; 9-0.9mm; B-1.25mm; C-1.6mm; E-2.5mm.
R7: Indicates material (X7R). Commonly used material Murata codes include 5C, R6, R7, F5, etc. The specific corresponding values are as follows: 5C-COG/NPO/CH; R6-X5R; R7-X7R; F5-Y5V.
1C: Indicates rated voltage (DC16V). Commonly used voltages Murata indicates include 0J, 1A, 1C, 1E, 1H, etc. The corresponding values are as follows: 0J-6.3V; 1A-10V; 1C-16V; 1E-25V; 1H-50V.
225: Indicates electrostatic capacity (22UF), expressed by 3 alphanumeric characters, and the unit is picofarad (pF). The first and second digits are significant digits, and the third digit represents the number of 0s after the significant digit. When there is a decimal point, it is represented by a capital letter "R". At this time, all numbers are significant digits. For example: R50 means 0.50, which is 0.5pF; 1R0 means 1.0pF; 101 means 100pF (that is, the first two digits of 10 are significant digits, the third digit of 1 is the first 10 significant digits, and the last 0 is 1, that is, 100pF ).
K: Indicates the allowable deviation of electrostatic capacity, which is also commonly referred to as gear level and accuracy (+-10%). Commonly used gear levels include B, C, D, J, K, M, and Z. The specific corresponding values are as follows: B=+ -0.1pF; C=+-0.25pF; D=+-0.5pF; J=+-5%; K=+-10%; M=+-20%; Z=+80,-20% normal 5C material The accuracy of materials can reach B, C, D and J levels; the accuracy of R6 and R7 materials can reach K and M levels; the accuracy of F5 materials can reach Z level.
E15: Individual specification code (ignorable, not important)
D: Packaging method (180mm diameter paper tape, tape and reel), commonly used packaging methods are L, D, B, etc. The specific methods are as follows: L means 180mm diameter embossed tape (plastic) tape and reel; D means 180mm diameter Packed in paper tapes and reels; B means packed in bulk bags.
3. Market Performance of Murata Capacitors
Murata capacitors are widely used in electronic and electrical products such as mobile phones, Bluetooth headsets, cars, speakers, IC modules, LCD screens, USB flash drives, remote controls, digital modules, electric toys, etc., from household appliances used in daily life to products that require We have absolute stability in all electronic equipment around the world, including automobiles, aerospace equipment, pacemakers and other implanted medical equipment, and we have trade relationships with factories around the world. Murata's sales of multilayer ceramic capacitors are expanding to nearly 9 trillion units. 9 trillion 0603 series (1.6×0.8mm) capacitors placed side by side can circle the sun and moon approximately 18 times. Murata Capacitors will be active in more and more fields. In addition, as environmentally friendly cars have become mainstream recently and automotive electronic control has further developed, the demand for capacitors has also increased sharply. In the future, Murata will continue to strive to promote the development of high functionality, miniaturization and stable quality.
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