Product
Brand
Articles
Tools
UTMEL
We are the professional distributor of electronic components, providing a large variety of products to save you a lot of time, effort, and cost with our efficient self-customized service. careful order preparation fast delivery service
Sort by
What are Varactor Diodes?24 November 2025
Varactor Diodes, also known as "variable reactance diodes", are made using the characteristic that the junction capacitance varies with the applied voltage when the PN junction is reverse biased. When the reverse bias voltage increases, the junction capacitance decreases, on the contrary, the junction capacitance increases.
What are Wire Wound Resistors?19 January 2026
Wire wound resistors are a type of fixed resistors. Wire-wound resistors are constructed with resistance wires wound on an insulating frame. The resistance wire is generally made of nickel-chromium, manganese-copper alloys with a certain resistivity.
What is an Accelerometer Sensor?20 April 2021
An accelerometer sensor is a sensor that can measure acceleration. It is usually composed of masses, dampers, elastic components, sensitive components, and adaptive circuits. In the process of acceleration, the sensor obtains the acceleration value by using Newton's second law, measuring the inertial force on the mass block. According to the different sensitive components of the sensor, common accelerometer sensors include capacitive, inductive, strain gauge, piezoresistive, piezoelectric and so on.
What is a Thyristor?11 December 2020
Thyristor, also known as silicon controlled rectifier (SCR), can control its conduction through a signal, but cannot control its turn-off, so it is called a semi-controlled device. The name thyristor often refers specifically to a basic type of thyristor, but broadly speaking, thyristors also include many derivative devices, such as Tri-Electrode AC switch (TRIAC), Fast Switching Thyristor (FST), Reverse-Conducting Thyristor (RCT) and Light-Triggered Thyristor (LTT).
Basic Introduction to Hall Effect Sensors13 November 2025
The Hall effect sensor is a magnetic field sensor made according to the Hall effect. The Hall effect is a type of magnetoelectric effect. This phenomenon was discovered by Hall (A.H. Hall, 1855-1938) in 1879 when he studied the conductive mechanism of metals.
AC Contactor: What is Self-Locking?01 March 2022
AC contactors often use three arc extinguishing methods: double-break electric arc extinguishing, longitudinal seam arc extinguishing and grid arc extinguishing. It is used to eliminate the arc generated by the moving and static contacts during the opening and closing process.This article mainly introduce the principle of AC Contactor self-locking.
What is a 555 Timer?09 April 2025
555 Timer is an integrated circuit chip that is often used for timers, pulse generators, and oscillating circuits. 555 can be used as a delay device, a trigger, or a starting resonator element in a circuit.
What is NAND Flash?04 November 2021
NAND Flash is a better storage device than hard disk drives and is particularly evident in low-volume applications up to 4GB. As the quest continues for lower power consumption, lighter weight, and better performance, NAND is proving to be very attractive. Its development goal is to reduce the cost per bit of storage and increase storage capacity.
What is CPLD (Complex Programmable Logic Device)?15 October 2025
CPLD uses CMOS EPROM, EEPROM, flash memory, and SRAM programming technology, thus constituting a programmable logic device with high density, high speed, and low power consumption. They are relatively large in scale and complex in structure and belong to the range of large-scale integrated circuits.
Introduction to BAW Filter25 September 2021
BAW filters are low-cost, small RF filters that can be utilized in a variety of applications up to 6 GHz.
Battery Charger IC Guide16 February 2022
The core component of the charger is the charger IC, also known as the battery charger IC. It plays a vital role in the charging process. The battery charger IC is mainly responsible for converting AC power into DC power to match the electronic devices, so as to achieve the purpose of delivering energy to electronic devices.
An Overview of SD Card12 April 2021
The SD (Secure Digital) card is a new generation of memory devices based on semiconductor flash memory. Due to its small size, data transmission speed, hot-swap, and other excellent features, it is widely used in portable devices, such as digital cameras, tablets, and multimedia players, etc.