AP851 50 Watts TO-220 High Power Resistors A high power TO-220 style resistor package designed for high frequency emitter circuits in switching power supplies. Also used in voltage regulation and low energy pulse loading. 50 Watts at 25C case temperature on heat sink Single screw mounting to heat sink Moulded case for proctection and easy to mount Non-inductive design Electrically isolated case RoHS Compliant Characteristics Power rating: 2.25 Watts in free air Operating voltage: 420V max Dielectric strength: 1800Vac Insulation resistance: 10G min Temperature coefficient: As specified, referenced to 25C, R taken at +105C Short time overload: R 0.3%, 2 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds Load life: R 1.0%, 2000 hours at rated power Damp heat with load: R 0.5%, 40 2C, 90 - 95% R.H max working voltage for 1000 hours with 1.5 hours ON and 0.5 hours OFF Solderability: 90% min coverage, 245 5C for 3 seconds Thermal shock: R 0.3%, -65C - 150C, 100 cycles Terminal strength: R 0.2%, 2.4 N Vibration and high frequency: R 0.2%, 20g peak Electrical Specifications Derating Curve Resistance Available Tolerance & Pref. Available TCR Value Range Value Ranges 100 R1 - 1R J (5%) K (10%) Not specified 80 1R02 - 3R 300ppm/C F (1%) , J (5%) , 60 100ppm/C K (10%) 3R01 - 10R 200ppm/C 40 50ppm/C 20 D (0.5%) F (1%) J 10R2 - 10K 100ppm/C (5%) K (10%) 0 200ppm/C 0 25 50 75 100 125 150 175 Preferred value ranges: Case Temperature (C) F (1%) - E96 , J (5%) - E24, K (10%) - E12 ARCOL UK Limited, The information contained herein does not form part of a Threemilestone Ind. Estate, contract and is subject to change without notice. ARCOL Truro, Cornwall, TR4 9LG, UK. operate a policy of continual product development, therefore, T +44 (0) 1872 277431 specifications may change. F +44 (0) 1872 222002 It is the responsibility of the customer to ensure that the E sales arcolresistors.com component selected from our range is suitable for the intended www.arcolresistors.com application. If in doubt please ask ARCOL. Page 1 of 2 2/13.18 Power Rated %AP851 50 Watts TO-220 High Power Resistors Dimensions (mm) 0.115 0.135 0.40 0.42 (2.92 3.44mm) 2.92 - 3.44 (10.15 10.67mm) 10.15 - 10.67 0.121 0.129 (3.08 3.28mm) 3.08 - 3.28 0.045 0.055 (1.14 1.40mm) 0.016 0.024 1.14 - 1.40 (0.40 0.60mm) 0.40 - 0.60 0.19 0.21 0.06 0.08 (4.82 5.34mm) 4.82 - 5.34 (1.52 2.04mm) 1.52 - 2.04 0.026 0.034 (0.66 0.86mm) 0.66 - 0.86 ARCOL UK Limited, The information contained herein does not form part of a Threemilestone Ind. Estate, contract and is subject to change without notice. ARCOL Truro, Cornwall, TR4 9LG, UK. operate a policy of continual product development, therefore, T +44 (0) 1872 277431 specifications may change. F +44 (0) 1872 222002 It is the responsibility of the customer to ensure that the E sales arcolresistors.com component selected from our range is suitable for the intended www.arcolresistors.com application. If in doubt please ask ARCOL. Page 2 of 2 2/13.18 0.115 0.135 (2.92 3.44mm) 0.10 0.16 2.92 - 3.44 (2.542.54 - 44.06m.0m6) 0.45 0.55 0.63 0.65 (11.43 13.97mm) 11.43 - 13.97 (16.00 16.52mm) 16.00 - 16.52