Power Resistor 25W 5% 4,7R
Varenummer:
101-562
Varekode:
RCH25E004,7
Vægt:
10 g
Lagerstatus:
Ikke på lager
Gruppe: C1492
VISHAY Power Thick Film Resistors
Series: RCH25
Power: 25W
Tolerance: 5%
VISHAY Power Thick Film Resistors
Series: RCH25
Power: 25W
Tolerance: 5%
| Features |
| • 25W at heatsink mounted (optional) • Compact size • Easy mounting • High insulation: 106MW |
 |
| Technical Specifications |
| |
| Tolerance: | ±5% |
| Power Rating | |
| Without Heatsink: | 4W |
| With Heatsink1): | 25W |
| Operating Voltage, Max.: | 550V |
| Dielectric Strength: | 3500V |
| Temperature Coefficient | |
| : | ±250ppm/°C |
| >1W: | ±150ppm/°C |
| Thermal Resistance: | 1,4°C/W |
| Temperature Range: | -55...+125°C |
| Climatic Category: | 55/125/56 |
| 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 (125°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 50°C, Power Rating: 20W 1) P = DT / [RTH(j-c) + RTH (c-a)] 2) DT = 125°C - 50°C = 75 K 3) [RTH(j-c) + RTH (c-a)] = DT / P = 75K / 20W = 3,75K/W4) RTH (c-a) = 3,75K/W - 1,4K/W = 2,35K/W |
|
| Terms of Delivery |
| Minimum order quantity: 1 PKU = 2 pieces |
|
| Manufacturer |
 |
| http://www.vishay.com |
|
Stregkode:
101562
Intern reference:
101562
Varekode:
RCH25E004,7
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