WF5NC8

1733 Reader's Spreads pg1-203:document 1/27/09 4:19 PM Page 183 WF thermal fuse built-in resistors EU features • Marking: Ceramic body with alpha/numeric marking • Products with lead-free terminations meet EU RoHS requirements. Pb located in glass material, electrode and resistor element is exempt per Annex 1, exemption 5 of EU directive 2005/95/EC dimensions and construction W D Ceramic Case Cement H Type WF5N WF7N WF10N 4.5+2 -1 P ød W D Dimensions inches (mm) H P d (R. Lead) d (Fuse Lead) Thermal Fuse Resistor 1.00±.059 +.079 .512±.039 .354±.039 (25.5±1.5) .197 -.039 +2 ) (13.0±1.0) (9.0±1.0) 1.52±.059 (5 -1 (38.5±1.5) +.079 .630±.039 .472±.039 1.38±.059 .295 -.039 +2 (16.0±1.0) (12±1.0) (35±1.5) (7.5 -1 ) .031 (0.8) 2A: 0.6 10A: 1.0 Lead Wire ordering information New Part # WF Type 5N Style 5N 7N 10N C Terminal Surface Temperature C: SnCu 8 Thermal Fuse Symbol See table below G Resistor Material G: Glass core wire wound S: Metal oxide film 100 Nominal Resistance 3 digits K Resistance Tolerance J: ±5% K: ±10% applications and ratings Thermal Fuse Symbol 8 10 12 14 32 33 34 35 Thermal Fuse Thermal Current Cut-off Temp. Rating 129±2 (STD) 152±2 +3 188 -1 +1 226 -3 110±2 126±2 130±2 (STD) +3 146 -2 Voltage Rating 5N 1.6 1.6 2.0 2.0 1.2 1.4 1.6 1.6 Power Rating (W) 7N 2.0 2.0 2.4 2.4 1.4 1.6 2.0 2.0 10N 2.5 2.5 3.5 3.5 –– –– –– –– Resistance Range/Material Resistance Tolerance Maximum Working Voltage Maximum Overload Voltage G: Glass S: Metal G: Glass S: Metal Core Oxide Core Oxide Wirewound Film Wirewound Film 10A 250V 2A 1 - 100 (E24) 110 - 10k J: ±5% (E24) K: ±10% J: ±5% E= √ P • R √ P • R • 6.25 E= * Other combination of thermal cut-off temperatures and resistance values are available on request Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 1/06/09 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 185 circuit protection 1733 Reader's Spreads pg1-203:document 1/27/09 4:20 PM Page 184 WF thermal fuse built-in resistors environmental applications Derating Curve 100 Percent Rated Power (%) Temp. Symbol 100 Percent Rated Power (%) Temp. Symbol 80 60 10˚ 80 60 40 20 0 33˚ 32˚ -25 -20 25 20 35˚ 34˚ P Temperature Rise (deg) circuit protection 40 20 8˚ 14˚ 12˚ 133 147 140 160 0 -25 -20 0 25 20 75 40 60 80 89 100 100 120 0 40 60 68 75 91 95 105 80 100 120 140 160 Ambient Temperature (˚C) Ambient Temperature (˚C) Temperature Rise 200 5N 150 7N 100 10N 50 Measuring Point 2 4 6 8 Load Power (W) For resistors operated at an ambient temperature of 25°C or above, a power rating shall be deleted in accordance with the above rating curves. 0 Performance Characteristics Parameter Resistance T.C.R. Overload (Short Time) Resistance to Soldering Heat Moisture Resistance Load Life Requirement Limit Typical Within specified — tolerance ±250 x 10-6/K (G) — ±300 x 10-6/K (S) ±2% ±1% ±5% ±5% ±1.8% ±0.9% ±4.5% ±4.5% Test Method 25°C +25°C/-55°C and +25°C/+125°C Rated voltage x 6.25 for 5 seconds 350°C ± 10°C, 3.5 seconds 40°C, 90% - 95% RH, 500 hours, No load Rated voltage, 25°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 5/13/08 186 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com