Vishay has introduced a new type of surface-mount Power Metal Strip resistors in a compact 0805 package and rated up to 1W. WSLP0805 ... 18 is designed to save space in automotive and computer applications, combining its high power-to-area ratio with extremely low resistance values (down to 0.005ohm).
The advanced structure of WSLP0805 ... 18 resistors combines solid metal nickel-chromium or manganese copper resistance elements with low TCR (<20 ppm / C). This results in high-power resistors in the 0805 package size, which maintains the excellent electrical characteristics of the Power Metal Strip structure.
The small size of the device allows it to replace larger current-sense resistors, saving space on the circuit board, which can provide consumers with smaller and lighter products.
WSLP0805… 18 consumes eight times the size of the 0805 package and is ideal for all current sensing and pulsed applications, including switches and linear power supplies, instruments, power amplifiers, and shunts in automotive electronic controls, such as engines and gearboxes , Audio electronics and climate control; DC / DC converters for servers, VRMs for notebook computers, and lithium-ion battery safety and management. To improve reliability, reducing the CTE (coefficient of thermal expansion) mismatch with the PCB reduces the possibility of solder joint cracking caused by thermal cycling.
The device uses a fully welded construction to help achieve superior electrical performance. Proprietary processing technology produces extremely low resistance values ranging from 0.005ohm to 0.01ohm with tolerances as low as ± 1%. WSLP0805 ... 18 offers extremely low inductance of 0.5ηH to 5ηH, response to 50MHz, low thermal EMF (<3μV / C), and temperature range of -65C to + 170C. The company said that lead-free (Pb) devices are RoHS-compliant and halogen-free.
