The RSKN1216 is a current-sensing resistor formed with a square-hole body and four terminals, produced by electron-beam welding pure copper terminals to a low-TCR resistor body. The resistor body is available in manganese copper or Karma alloy. A full-metal construction, together with pickling and passivation of the metal surface, gives the part resistance to vulcanization and strong weather resistance, while the 4-terminal arrangement supports accurate current sensing. The part carries ultra-low thermal EMF and ultra-low parasitic inductance, giving it a fast response suited to high-frequency AC current detection as well as DC sensing, and each unit is laser marked with its value.
The RSKN1216 spans five value and material combinations. In manganese copper, values of 0.3mΩ, 0.5mΩ and 1mΩ carry rated power of 10W, 9W and 7W respectively. In Karma, values of 2mΩ and 2.5mΩ both carry a rated power of 5W. All values share a temperature coefficient of resistance of ±75ppm/°C, and tolerance is available in ±0.5%, ±1% or ±5% across the range. All variants share a parasitic inductance below 3nH, a thermal EMF of less than 1μV/°C over 0-100°C, and an operating temperature range of -55°C to +170°C. Rated power follows a derating curve that holds 100% of rated power up to 70°C ambient before linearly reducing to zero at 170°C.
Physically, the RSKN1216 measures 4.1mm (-0.3mm tolerance) in length, 3.1mm (-0.35mm tolerance) in width and 1.9mm (-0.35mm tolerance) in height, with a terminal dimension A of 2.7±0.1mm and further terminal features B, C, D and E of 0.5±0.1mm, 0.8+0.3mm, 0.1mm and 0.6+0.15mm respectively. The part is qualified to IEC60115-1 test methods covering temperature coefficient of resistance, solderability, short-time overload, resistance to soldering heat, high-temperature and humidity exposure, high-temperature storage, low-temperature load, temperature cycling and load life, and is AEC-Q200 qualified and RoHS compliant. Parts are supplied on 7-inch reels for 12mm tape, in quantities of 1,000 pieces per reel.
