• RS Stock No. 684-2825
  • Brand Vishay
  • Mfr. Part No. LPS0300H4700JB
Vishay
Vishay LPS300 Series Screw Termination Thick Film Panel Mount Resistor, 470Ω ±5% 300W
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Product Details

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 - 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.

Key Characteristics
Overload duration RCH25 RCH50 BDS100 BDS250
1 sec. 375W 750W 200W 1500W
2 sec. 300W 600W 150W 1250W
5 sec. 125W 250W 125W 1000W
10 sec. 75W 150W 100W 750W
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.
Tightening Torque
RCH25 RCH50 BDS100 BDS250
0.7Nm 1Nm 2Nm 2Nm
Dimensions
Sfernice series RCH 5 RCH 10 RCH 25 RCH 50
L 16.6 19 28 50
W 9 11 14 15.5
H 16.4 20.6 27.5 29.4
P 10.2 12.7 18.3 33
F 11.3 14.3 18.3 39.7
T 12.5 15.9 19.8 21.4
S 5.3 5 7.7 8
ØD 2.4 2.4 3.2 3.2
  M2 M2 M3 M3
Specifications
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Resistance470 Ω
Power Rating300W
SeriesLPS300
Tolerance±5%
TechnologyThick Film
Termination StyleScrew
Minimum Operating Temperature-55°C
Maximum Operating Temperature+120°C
Minimum Temperature Coefficient-150ppm/°C
Maximum Temperature Coefficient+150ppm/°C
Temperature Coefficient±150ppm/°C
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Temporarily out of stock - back order for despatch 27/07/2017
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Technical Reference
  • RS Components

    Statement of conformity


    The product detailed below complies with the specifications published by RS Components. Where applicable it provides assurance that electrostatic discharge sensitive devices have been handled and packed under conditions that meet the administrative and technical requirements of the ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007 Electrostatic Control Standards.
    RS Stock No. 684-2825
    Description Vishay LPS300 Series Screw Termination Thick Film Panel Mount Resistor, 470Ω ±5% 300W
    Manufacturer/Brand: Vishay
    Mfr. Part No. LPS0300H4700JB
    The foregoing information relates to product sold on, or after, the date shown below.
    RS COMPONENTS
    Date Jul 24, 2017
    RS Components Ltd, Birchington Road, Corby, Northamptonshire, NN17 9RS, UK
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