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Resistor TO220 20W 5% 47R
Varenummer:84-244
Varekode:RTO20FE047
Vægt:3.3g
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Internet-pris
Inkl. moms:
Kr. 52,74
v/10Kr. 42,19
v/25Kr. 37,98
v/100Kr. 31,64
RTO20FE047RTO20FE047RTO20FE047 DimensionsRTO20FE047 DeratingRTO20FE047 DimensionsRTO20FE047 Derating
Gruppe: C1481
VISHAY Thick Film Resistors
Series: RTO20F
Power: 20W
Tolerance: 5%
Housing: TO220

Features
• 20W at 25°C and heatsink mounted (optional)
• Low inductance
• Compact size
• Easy to mount due to TO220-package
Technical Specifications
Tolerance:
±5%
Power Rating
Without Heatsink (25°C):
2W
With Heatsink1) (25°C):
20W
Operating Voltage, Max.:
250W
Dielectric Strength:
2000Vrms
Temperature Coefficient
£0,1W:
±250ppm/°C
£0,5W:
±150ppm/°C
Thermal Resistance:
6,5°C/W
Temperature Range:
-55...+155°C
Climatic Category:
55/155/56
Derating:
See Curve
1) For calculation of heatsink please see values below Note.
Note
• You will find suitable heatsinks at product group G9511.
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
Terms of Delivery
Minimum order quantity: 1 PKU = 2 pieces
Form of delivery: Original PKU, 50 pieces in a tube
Manufacturer
Vishay/Sfernice
http://www.vishay.com
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