solder alloy
71Die casting — An engine block with aluminium and magnesium die castings. Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mold cavity. The mold cavity is created using two hardened tool steel dies… …
72Thermal management of high power LED — With the coming of energy saving era, high power light emitting diodes (LEDs) are promising to replace other technologies such as incandescent and fluorescent bulbs in signaling, solid state lighting, and vehicle headlight applications due to… …
73Quad-flat no-leads package — 28 pin QFN, upside down to show contacts and thermal/ground pad Flat no leads packages such as QFN (quad flat no leads) and DFN (dual flat no leads) physically and electrically connect integrated circuits to printed circuit boards. Flat no leads …
74fusible metal — noun an alloy with a low melting point and used as solder and in safety plugs and sprinkler fuses • Hypernyms: ↑alloy, ↑metal * * * noun or fusible alloy : a metal or alloy (as of bismuth, lead, and tin or of these three metals and cadmium or… …
75Transistor — For other uses, see Transistor (disambiguation). Assorted discrete transistors. Packages in order from top to bottom: TO 3, TO 126, TO 92, SOT 23 A transistor is a semiconductor device used to amplify and switch electronic signals and power. It… …
76Wood's metal — Wood s metal, also known as Lipowitz s alloy or by the commercial names cerrobend, bendalloy, pewtalloy or MCP 158, is a eutectic, fusible alloy with a melting point of approximately 70 °C (158 °F). It is a eutectic alloy of… …
77Bismuth — (pronEng|ˈbɪzməθ) is a chemical element that has the symbol Bi and atomic number 83. This heavy, brittle, white crystalline trivalent poor metal has a pink tinge and chemically resembles arsenic and antimony. Of all the metals, it is the most… …
78Lead — (pronEng|ˈlɛd) is a main group element with a symbol Pb ( la. plumbum). Lead has the atomic number 82. Lead is a soft, malleable poor metal, also considered to be one of the heavy metals. Lead has a bluish white color when freshly cut, but… …
79Water pipe — For the various smoking devices, see hookah or bong. For other uses, see pipe. [ thumb|200px|A system of copper water tubes used in a radiator heating system.] Water pipes are pipes or tubes, frequently made of polyvinyl chloride (PVC/uPVC),… …
80Fuse (electrical) — A miniature time delay fuse used to protect electronic equipment, rated 0.3 amperes at 250 volts. 1.25 inches (about 32 mm) long …
