Commonly used triode model parameters

The KG-300K needle head has a diameter of 3.0mm and is designed for normally open switches.

Here's a comprehensive overview of some commonly used transistors and their specifications: MPS2222A NPN transistor with a high-frequency amplification capability up to 75V, 0.6A, 0.625W, and a bandwidth of 300MHz. 9011 NPN transistor with high-frequency amplification at 50V, 30mA, 0.4W, and 150MHz. 9012 PNP transistor suitable for low-frequency amplification at 50V, 0.5A, 0.625W. 9013 NPN transistor for low-frequency amplification at 50V, 0.5A, 0.625W. Another variant of the 9013 NPN transistor, also for low-frequency amplification at 50V, 0.5A, 0.625W. 9014 NPN transistor with low-noise amplification at 50V, 0.1A, 0.4W, and 150MHz. 9015 PNP transistor with low-noise amplification at 50V, 0.1A, 0.4W, and 150MHz. 9018 NPN transistor for high-frequency amplification at 30V, 50mA, 0.4W, and 1GHz. 8050 NPN transistor with high-frequency amplification at 40V, 1.5A, 1W, and 100MHz. 8550 PNP transistor with high-frequency amplification at 40V, 1.5A, 1W, and 100MHz. 2N2222 NPN transistor capable of handling 4A with high-frequency amplification at 60V, 0.8A, 0.5W, and a rise time of 25/200ns with β=45. 2N2222A NPN transistor for small-signal high-frequency amplification at 75V, 0.6A, 0.625W, and 300MHz. 2N2369 NPN transistor for switching applications at 40V, 0.5A, 0.3W, and 800MHz. 2N2907 NPN transistor with universal characteristics at 60V, 0.6A, 0.4W, and rise times of 26/70ns with β=200. 2N3055 NPN power transistor for high-power amplification at 100V, 15A, 115W. 2N3440 NPN transistor for video switching at 450V, 1A, 1W, and 15MHz. 2N3773 PNP transistor for audio power amplification and switching at 160V, 16A, 150W. 2N3904 NPN transistor for general-purpose use at 60V, 0.2A, with a current gain (β) between 100 and 400. 2N3906 PNP transistor for general-purpose use at 40V, 0.2A, with a current gain (β) between 100 and 400. 2N5401 PNP transistor for video zooming at 160V, 0.6A, 0.625W, and 100MHz. 2N5551 NPN transistor for video zooming at 160V, 0.6A, 0.625W, and 100MHz. 2N5685 NPN transistor for audio amplification and switching at 60V, 50A, 300W. 2N6277 NPN transistor for amplification and switching at 180V, 50A, 250W. 2N6609 PNP transistor for audio power amplification and switching at 160V, 15A, 150W. 2N6678 NPN transistor for audio power amplification and switching at 650V, 15A, 175W, and 15MHz. 2N6718 NPN transistor for small-signal audio amplification and switching at 100V, 2A, 2W, and 50MHz. 3DA87A NPN transistor for video zooming at 100V, 0.1A, 1W. 3DG6A NPN transistor for general-purpose use at 15V, 20mA, 0.1W, and 100MHz. 3DG6B NPN transistor for general-purpose use at 20V, 20mA, 0.1W, and 150MHz. 3DG6C NPN transistor for general-purpose use at 20V, 20mA, 0.1W, and 250MHz. 3DG6D NPN transistor for general-purpose use at 30V, 20mA, 0.1W, and 150MHz. 3DG12C NPN transistor for general-purpose use at 45V, 0.3A, 0.7W, and 200MHz. 3DK2B NPN transistor for switching applications at 30V, 30mA, 0.2W. 3DK4B NPN transistor for switching applications at 40V, 0.8A, 0.7W. 3DK7C NPN transistor for switching applications at 25V, 50mA, 0.3W. 3DD15D NPN transistor for power switching at 300V, 5A, 50W. 3DD102C NPN transistor for power switching at 300V, 5A, 50W. 3522V voltage regulator tube for recording purposes. A634 PNP transistor for audio amplification and switching at 40V, 2A, 10W. A708 PNP transistor for general-purpose use at 80V, 0.7A, 0.8W. A715C PNP transistor for audio amplification and switching at 35V, 2.5A, 10W, 160MHz. A733 PNP transistor for general-purpose use at 50V, 0.1A, 180MHz. A741 PNP transistor for general-purpose use. A781 PNP transistor for switching applications at 20V, 0.2A. A928 PNP transistor for general-purpose use at 20V, 1A, 0.25W. A933 PNP transistor for general-purpose use at 50V, 0.1A, 140MHz. A940 PNP transistor for audio amplification and switching at 150V, 1.5A, 25W, 4MHz. A950 PNP transistor for general-purpose use at 30V, 0.8A, 0.6W. A966 PNP transistor for audio excitation output at 30V, 1.5A, 0.9W. A968 PNP transistor for audio power amplification and switching at 160V, 1.5A, 25W, 100MHz. A1012 PNP transistor for audio power amplification at 60V, 5A, 2W. A1013 PNP transistor for video zooming at 160V, 1A, 0.9W. A1015 PNP transistor for general-purpose use at 60V, 0.15A, 0.4W, 8MHz. A1020 PNP transistor for audio switching at 50V, 2A, 0.9W. A1123 PNP transistor for low-noise amplification at 150V, 0.05A, 0.75W. A1162 PNP transistor for general-purpose use at 50V, 0.15A, 0.15W. A1216 PNP transistor for amplification and switching at 180V, 17A, 200W, 20MHz. A1220 PNP transistor for audio power amplification and switching at 120V, 1.5A, 20W, 150MHz. A1265 PNP transistor for amplification and switching at 140V, 10A, 100W, 30MHz. A1295 PNP transistor for amplification and switching at 230V, 17A, 200W, 30MHz. A1301 PNP transistor for amplification and switching at 160V, 10A, 100W, 30MHz. These components cover a wide range of applications from general-purpose use to specialized tasks such as audio and video amplification.