POWER METAL FIXED RESISTOR 功率型金屬膜電阻器 Structure 結構 Derating Curve 功率下降曲線 Type 規格 Max Working Voltage 最大工作電壓 Max overload 最大負載電壓 Dielectric Withstanding Voltage 絕緣電壓 Operating Temperature Range 溫度範圍 PMR1WSSS 500V 600V 350V -55℃~+275℃ PMR2WS PMR3WS Type 規格 D (mm) L (mm) d (max) H (mm) Resistance Range 阻值範圍 PMR1WSSS 2.5 (Max) 7.5 (Max) 0.54±0.05 28±3.0 ±1%: 22 Ω ~ 470KΩ ±5%: 22 Ω ~ 470KΩ PMR2WS 4.0 (Max) 11.0 (Max) 0.70±0.05 ±1%: 3.9 Ω ~ 100KΩ ±5%: 3.9 Ω ~ 100KΩ PMR3WS 5.5 (Max) 16.0 (Max) Characteristic 特性 Test Item 測試項目 Standard 標準 Temperature coefficient 溫度係數 3.9Ω ~100K Ω = ±350 PPM/℃ 470K Ω = ±700 PPM/℃ Short time overload 短時間過負荷 ΔR/R ≤ ±(2.0%+0.05Ω) Solder ability 焊接能力 Min. 95% coverage Resistance to soldering heat 焊接熱耐性 ΔR/R ≤ ±(1.0%+0.05Ω) Temperature cycling 溫度週期變化 Terminal strength 端腳強度 No evidence of mechanical damage 無機械破損痕跡 Test Item 測試項目 Standard 標準 Load Life in humidity 濕度壽命 Less than 100KΩ ΔR/R ≤ ±5.0% 100KΩ or more ΔR/R ≤ ± 10.0% Load Life 負載壽命 Pulse overload 脈衝過負荷 ΔR/R ≤ ±(5.0%+0.05Ω) Resistance to solvent 電阻耐溶劑 No deterioration of protective coating and markings 無皮層脫離痕跡 Dielectric withstanding voltage 絕緣電壓 No evidence of flashover, mechanical damage, arcing or insulation breakdown 無電弧, 機械, 損傷, 擊穿或絕緣體破損痕跡