HK UPPERBOND INDUSTRIAL LIMITED
HK UPPERBOND INDUSTRIAL LIMITED
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Molins MK9 Model Through-Hole Version Mosfet Irfz44ns For Kretek Machines
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. Transistors are one of the basic building blocks of modern electronics. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit.
Source-Drain Ratings and Characteristics
| Parameter | Typ- | Max. | |
| Is | Continuous Source Current (Body Diode) | — | 49 |
| Ism | Pulsed Source Current (Body Diode)① | — | 160 |
| VsD | Diode Forward Voltage | — | 1.3 |
| trr | Reverse Recovery Time | 63 | 95 |
| Qrr | Reverse Recovery Charge | 170 | 260 |
Pocket Transistor Radio
The first "prototype" pocket transistor radio was shown by INTERMETALL (a company founded by Herbert Mataré in 1952) at the Internationale Funkausstellung Düsseldorf between August 29, 1953 and September 6, 1953. The first "production" pocket transistor radio was the Regency TR-1, released in October 1954.
Mass Production
In the 1950s, Egyptian engineer Mohamed Atalla investigated the surface properties of silicon semiconductors at Bell Labs, where he proposed a new method of semiconductor device fabrication, coating a silicon wafer with an insulating layer of silicon oxide so that electricity could reliably penetrate to the conducting silicon below, overcoming the surface states that prevented electricity from reaching the semiconducting layer. This is known as surface passivation, a method that became critical to the semiconductor industry as it later made possible the mass-production of silicon integrated circuits.
