Technical features 1. High content ceramic ceramic rod and heat-resistant nickel alloy resistance wire are used. 2. It has excellent short-time anti pulse voltage (current) characteristics 3. Accuracy: ± 2%, ± 5%, ± 10% 4. It is coated and packaged with color ring marks 5. Working temperature range: - 55 ℃~+155 ℃ 6 Temperature coefficient: generally ± 350PPM/℃ (the test temperature is 25 ℃～+85 ℃) KNP series technical parameters Model Rated power (70 ℃) Size (mm) Resistance range D ± 1.0L ± 1.0d ± 0.05H ± 3 Normal size KNP-1/2W1/2W3.59.50.50280.1 Ω~50 Ω KNP-1W1W4.511.50.65280.1 Ω~100 Ω KNP-2W5.515.50.70280.1 Ω~500 Ω KNP-3W3W6.517.50.70280.1 Ω~1K Ω KNP-5W8.525.00.75280.1 Ω~1K Ω Miniaturized size KNP-1W-S1W3.59.50.50280.1 Ω~100 Ω KNP-2W-S2W4.511.50.65280.1 Ω~500 Ω KNP-3W-S3W5.550.70280.1 Ω. 1 Ω~1K Ω KNP-5W-S5W6.517.50.70280.1 Ω~1K Requirements for main periodic inspection items and methods of Ω power reduction curve Requirements for inspection items Method Overload for a short time without visible damage, with clear signs Δ R ≤± (2.0% R+0.05 Ω) The applied voltage shall be 1.5 times the maximum working voltage for 5 seconds. The insulation resistance is ≥ 1000M Ω, the measuring voltage is 500V, the welding heat resistance is no visible damage for 1 minute, and the marks are clear, Δ R ≤± (1.0% R+0.05 Ω) 260 ℃± 5 ℃ 10 ± 1s Solderability Bath temperature: 255 ± 5 ℃ Solder coating, immersion time 2S, pin surface S ≥ 95% temperature impact, no visible damage, clear marks, Δ R ≤± (2.0% R+0.05 Ω) - 65 ℃/+155 ℃, continuous circulation for 5 times, no visible damage, clear signs, Δ R ≤± (2.0% R+0.05 Ω) - 10 ℃～+65 ℃, RH ＞ 90%, cycle for 240h, rated power life, no visible damage, clear signs, Δ R ≤± (5.0% R+0.05 Ω) The applied voltage shall be the rated voltage or the limit voltage of the element: 1.5 hours on/0.5 hours off, 70 ℃, 1000 hours applicable standard