Features
• 50W at 25°C heatsink mounted (optional)
• Low inductance
• Compact size
• Easy to mount due to TO220-package
Technical Specifications
• Resistance Value: Row E12
• Tolerance: ±5%
• Power Rating:
- Without Heatsink (25°C): 2,25W
- With Heatsink1) (25°C): 50W
• Operating Voltage, Max.: 300V
• Dielectric Strength: 2000Vrms
• Temperature Coefficient:
- £0,046W: ±300ppm/°C
- £0,1W: ±250ppm/°C
- £0,5W: ±150ppm/°C
• Thermal Resistance: 2,6K/W
• Temperature Range: -55...+155°C
• Climatic Category: 55/155/156
• Derating: See Curve
Calculation of heatsink
P = DT / [RTH(j-c) + RTH(c-a)]
P = Expressed in W
DT = Difference between maximum working temperature (155°C) and room temperature
RTH(j-c) = Thermal resistance of the component
RTH(c-a) = Thermal resistance of the heatsink and quality of fastening device
Example:
Ambient Temperature 30°C, Power Rating: 13W
1) P = DT / [RTH(j-c) + RTH (c-a)]
2) DT = 155°C - 30°C = 125 K
3) [RTH(j-c) + RTH (c-a)] = DT / P = 125K / 13W = 9,6K/W4) RTH (c-a) = 9,6K/W - 2,6K/W = 7K/W
