leaded resISTORS Biased Humidity Type Carbon Film Resistors Normal & Miniature Style [ CFN Series ] FEATURES Power Rating 1/6W, 1/4W, 1/2W, 1W, 2W, 3W Resistance Tolerance ±2%, ±5% T.C.R. see Table 1 DERATING CURVE For resistors operated in ambient temperatures above 70°C, power rating must be derated in accordance with the curve below. INTRODUCTION The CFN Series Carbon Film Biased Humidity Resistors are manufactured by coating a homogeneous film of pure carbon on high grade ceramic rods. After a helical groove has been cut in the resistive layer, tinned connecting leads of electrolytic copper are welded to the end-caps. The resistors are coated with a specialized tan lacquer. Its processes and controls ensure the product is impervious to moisture. Rated Load (%) 70 155 °C 100 80 60 40 20 20 40 60 80 100 120 140 160 Ambient Temperature (°C) TABLE 1 TEMPERATURE COEFFICIENT STYLE Max. Value of Temp. Coefficient ppm/°C under 100K Ω 100K Ω - 1M Ω 1M Ω - 10M Ω CFN100,CFN200,CFN2WS,CFN3WS ±350 -500 -1,500 CFN-12, CFN-25, CFN-50, CFN25S, CFN50S, CFN1WS -700 -1,500 +350 / -500 DIMENSIONS Unit: mm STYLE ød H L øD DIMENSION Normal Miniature L øD H ød CFN-12 CFN25S 3.4±0.3 1.9±0.2 28±2.0 0.45±0.05 CFN-25 CFN50S 6.3±0.5 2.4±0.2 28±2.0 0.55±0.05 CFN-50 CFN1WS 9.0±0.5 3.3±0.3 26±2.0 0.55±0.05 CFN100 CFN2WS 11.5±1.0 4.5±0.5 35±2.0 0.8±0.05 CFN200 CFN3WS 15.5±1.0 5.0±0.5 33±2.0 0.8±0.05 41 Note: ELECTRICAL CHARACTERISTICS STYLE CFN-12 CFN25S CFN-25 CFN50S CFN-50 CFN1WS CFN100 Power Rating at 70°C 1/6W 1/4W 1/2W Maximum Working Voltage 150V 200V 250V 300V 350V 400V 500V Maximum Overload Voltage 300V 400V 500V 600V 700V 800V 1,000V Voltage Proof 300V 400V 500V 700V 1,000V Resistance Range 1 Ω - 10M Ω & 0 Ω for E24 series value Operating Temp. Range -55°C to +155°C Temperature Coefficient see Table 1 1W CFN2WS CFN200 CFN3WS 2W 3W Note: Special value is available on request ENVIRONMENTAL CHARACTERISTICS PERFORMANCE TEST TEST METHOD Short Time Overload IEC 60115-1 4.13 2.5 times RCWV for 5 Sec. ±0.75%+0.05 Ω Voltage Proof IEC 60115-1 4.7 in V-block for 60 Sec., test voltage by type No breakdown or flashover Temperature Coefficient IEC 60115-1 4.8 -55°C to +155°C By type Insulation Resistance IEC 60115-1 4.6 in V-block for 60 Sec. >1,000M Solderability IEC 60115-1 4.17 235±5°C for 3±0.5 Sec. 95% Min. coverage Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 5±0.5 Min. with ultrasonic No deterioration of coatings and markings Robustness of Terminations IEC 60115-1 4.16 Direct load for 10 Sec. in the direction of the terminal leads ≥2.5kg (24.5N) Periodic-pulse Overload IEC 60115-1 4.39 4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off) ±1.0%+0.05 Ω Damp Heat Steady State IEC 60115-1 4.24 40±2°C, 90-95% RH for 56 days, loaded with 0.1 times RCWV ±3%+0.05 Ω Endurance at 70°C IEC 60115-1 4.25 70±2°C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off) ±3%+0.05 Ω Temperature Cycling IEC 60115-1 4.19 -55°C Room Temp. +155°C Room Temp. (5 cycles) ±1%+0.05 Ω Resistance to Soldering Heat IEC 60115-1 4.18 260±3°C for 10±1 Sec., immersed to a point 3±0.5mm from the body ±1%+0.05 Ω Note: Rated Continuous Working Voltage (RCWV) = APPRAISE Power Rating x Resistance Value