Vishay
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1£41.35
10£35.73
In stock for next working day delivery, when ordered before 20:30
  • RS Stock No. 684-2825
  • Brand Vishay
  • Mfr. Part No. LPS0300H4700JB
  • RoHS Status
  • Catalogue page 616
  • Customer reviews (0) Add a review
Specifications
Maximum Operating Temperature+120°C
Maximum Temperature Coefficient+150ppm/°C
Minimum Operating Temperature-55°C
Minimum Temperature Coefficient-150ppm/°C
Power Rating300W
Resistance470Ω
TechnologyThick Film
Temperature Coefficient±150ppm/°C
Termination StyleScrew
Tolerance±5%
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300 Watt LPS300 Series

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.

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
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