Metal Oxide Thermal Grease, 0.65W/m·K

25 Watt RCH25 Series These 25W RCH25 Series resistors are designed to be mounted onto a heatsink. They can bear high short time overloads, are non inductive and are particularly suitable for high frequency operation and cut-out circuits. Power at 25°C 25W with heatsink, 4W without heatsink Resistance Tolerance ±5% Temperature Coefficient ≤1Ω ±250ppm/°C, >1Ω ±150ppm/°C Operating Temperature -55°C → +125°C Thermal Resistance 1.0°C/W Limiting Element Voltage 550Vac Overload Voltage 1100Vac (Max.) Dielectric Withstand Voltage 3.5KVac Insulating Resistance 10000MΩ Length 28 mm Width 27.5 mm Height 15 mm RS Pro Heat Sink Compound, 20ml tube Dimensions Sfernice series RCH 5 RCH 10 RCH 25 RCH 50 L 16.6 19 28 50 W 9 11 14 15.5 H 16.4 20.6 27.5 29.4 P 10.2 12.7 18.3 33 F 11.3 14.3 18.3 39.7 T 12.5 15.9 19.8 21.4 S 5.3 5 7.7 8 ØD 2.4 2.4 3.2 3.2 M2 M2 M3 M3 Key Characteristics Overload duration RCH25 RCH50 BDS100 BDS250 1 sec. 375W 750W 200W 1500W 2 sec. 300W 600W 150W 1250W 5 sec. 125W 250W 125W 1000W 10 sec. 75W 150W 100W 750W For each degree the ambient temperature is raised above 25°C, there is a reduction by 1% of the permitted overload. The key characteristics table is only applicable to resistors suitably mounted on a heatsink with a thermal resistance of 1°C/W for 25 and 50W ratings, 0.7°C/W for 100W and 0.28°C/W for 250W ratings. This data is only valid when thermal grease is used and the resistor is correctly tightened by mounting screws. Tightening Torque RCH25 RCH50 BDS100 BDS250 0.7Nm 1Nm 2Nm 2Nm

Metal Oxide Thermal Grease, 0.65W/m·K

Location: Sydney 25 Pavesi Street Smithfield NSW 2164

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