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|Maximum Operating Temperature||+125°C|
|Maximum Temperature Coefficient||+150ppm/°C|
|Minimum Operating Temperature||-55°C|
|Minimum Temperature Coefficient||-150ppm/°C|
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500W Thick film non-inductive Power resistors - RPS500DH Series
Thick film non-inductive power resistors
Use with a heatsink to achieve high power rating of 500W at 70°C
Withstands severe pulse overloads
Easy to install
Low thermal emission
|Power At 70°C||500W with heatsink|
|Momentary Overload||1000W for 10 seconds|
|Resistance tollerance||±5 %|
|Temperature Coefficient||±150 ppm/°C|
|Operating Temperature||-55 → +125°C|
|Thermal Resistance||0.11 °C/W|
|Limiting Element Voltage||5 kV|
|Dielectric Withstand Voltage||12 kV|
|Insulating Resistance||>106 MΩ under Uins = 500 VDC|
|Maximum Inductance||<50 nH|
|Weight||250 g ±10%|
Non-Inductive - Panel Mount
Non-Inductive - Heatsink Mountable
Virtually non-inductive, thick film power resistors designed for direct heatsink attachment and ideal for installation where easy connection in a limited space is required.
A specially formulated cermet film is deposited onto a high purity alumina substrate and housed in a hard epoxy moulding into which the terminals are integrated.
Values of 1Ω and below have 4 terminals to permit voltage sensing; all other values have 2 terminals
Applications include circuits where low inductance, high frequencies and pulse overloads are key parameters.
Application note: derate linearly from full power at 25°C for 25 and 50W types and 70°C for 100 and 250W types to zero at 125°C. For best heat transfer it is suggested that a heat compound is applied between the alumina bottom surface and the heatsink chassis/surface.
|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.
|Sfernice series||RCH 5||RCH 10||RCH 25||RCH 50|
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