What is the SMD resistor?
SMD resistors on a circuit board from a USB memory stick. SMD stands for Surface Mounted Device. An SMD is any electronic component that is made to use with SMT, or Surface Mount Technology.
SMT (surface mount technology) component placement systems, commonly called pick-and-place machines or P&Ps, are robotic machines which are used to place surface-mount devices (SMDs) onto a printed circuit board (PCB).
- surface-mount device
- Through-hole technology (tht), also spelled "thru-hole", refers to the mounting scheme used for electronic components that involves the use of leads on the components that are inserted into holes drilled in printed circuit boards (PCB) and soldered to pads on the opposite side either by manual assembly (hand placement)
Acronym Definition SMT Study Management Team (NIH) SMT Seismic MicroTechnology (software company) SMT Santé-Mentale-Travail (French: Mind-Health-Labor; Canada) SMT Smart Manufacturing Technology (est. 2002; UK)
The purpose of this guide is to introduce SMD (Surface Mount Device) hand soldering. The guide is organized into different methods. Each method is used specifically for a group of SMD components.
- Dip soldering is a small-scale soldering process by which electronic components are soldered to a printed circuit board (PCB) to form an electronic assembly. The solder wets to the exposed metallic areas of the board (those not protected with solder mask), creating a reliable mechanical and electrical connection.
- There is no proper soldering iron temperature just for a given type of solder - the iron temperature should be set for both the component and the solder. When soldering surface mount components, a small tip and 600F (315C) should be sufficient to quickly solder the joint well without overheating the component.
- The typical reflow temperature range for Pb-Free (Sn/Ag) solder is 240-250°C with 40-80 seconds over 220°C. It should be noted that the recommended Sn/Pb reflow temperature range are less critical, and that minor deviations in temperature of equipment and components generally do not create soldering problems.
Updated: 16th October 2019