Vishay LPS300 Series Screw Termination Wire Wound Fixed Resistor, 470Ω ±5% 300W
- RS Stock No. 684-2825
- Brand Vishay
- Mfr. Part No. LPS0300H4700JB
LPS300 Series 300 W Thick Film Power Resistor
LPS300 series 300 W thick film power resistors for mounting onto a heatsink. These LPS300 power resistors have a rating of 300 W at 85°C bottom case temperature, a low thermal radiation of the case and offer a wide resistance range from 0.3 to 900 kΩ.
|Power at 85°C||300 W|
|Resistance Tolerance||5 %|
|Temperature Coefficient||1U < R ≤ 10U||300ppm/°C|
|10U < R||150ppm/°C|
|Operating Temperature||-50 → 120 °C|
|Thermal Resistance||0.112 °C/W|
|Limiting Element Voltage||5 kV|
|Insulating Resistance||≥ 104|
|Inductance||≤ 0.1 μH|
|Dimensions||60 x 57 x 25.2 mm|
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|
|Minimum Operating Temperature||-55°C|
|Maximum Operating Temperature||+120°C|
|Minimum Temperature Coefficient||-150ppm/°C|
|Maximum Temperature Coefficient||+150ppm/°C|
|Board Level Components||Y|
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Statement of conformity
|Vishay LPS300 Series Screw Termination Wire Wound Fixed Resistor, 470Ω ±5% 300W|
|Date||Mar 23, 2017|
RS Update Revision Language