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  2. Komponenter
  3. Modstande
  4. Induktionssvage
  5. RTO20FK004,7

Resistor TO220 20W 5% 4,7K

Varenummer:84-251
Varekode:RTO20FK004,7
Vægt:3.2g
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Inkl. moms:
Kr. 52,74
v/10Kr. 42,19
v/25Kr. 37,98
v/100Kr. 31,64
RTO20FK004,7RTO20FK004,7RTO20FK004,7 DimensionsRTO20FK004,7 DeratingRTO20FK004,7 DimensionsRTO20FK004,7 RTO20F_RTO20FK004,7 Derating
Features
• 20W at 25°C and 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):
 2W
With Heatsink1) (25°C):
 20W
Operating Voltage, Max.:
 250W
Dielectric Strength:
 2000Vrms
Temperature Coefficient
�0,046W:
 ±300ppm/°C
�0,1W:
 ±250ppm/°C
�0,5W:
 ±150ppm/°C
Thermal Resistance:
 6,5K/W
Temperature Range:
 -55...+155°C
Climatic Category:
 55/155/156
Derating:
 See Curve
1) For calculation of heatsink please see values below Note.
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 25°C, Power Rating: 10W
1) P = DT / [RTH(j-c) + RTH (c-a)]
2) DT = 155°C - 25°C = 130K
3) [RTH(j-c) + RTH (c-a)] = DT / P = 130K / 10W = 13K/W4) RTH (c-a) = 13K/W - 6,5K/W = 6,5K/W
Manufacturer
Vishay/Sfernice
http://www.vishay.com
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