User Manual

RPS 500
Vishay Sfernice
Power Resistors for Mounting onto a Heatsink
Thick Film Technology
www.vishay.com For technical questions, contact: [e-mail] Document Number: 50047
1 Revision: 14-Nov-08
FEATURES
• High power rating: 500 W
• High overload capability up to 2 times rated
Power (see energy curve)
• Heatsink mounting
• Low thermal radiation of the case
This range has been developed specifically for electrical traction applications and is capable of dissipating 500 W at + 70 °C. The
remarkable performance characteristics are evident when used in severe pulse conditions. The copper base allows easy
mounting on the heatsink and provides optimal dissipation conditions.
DIMENSIONS in millimeters
MECHANICAL SPECIFICATIONS
ENVIRONMENTAL SPECIFICATIONS
RoHS
COMPLIANT
RPS 500D
73
56
57
33.5
Ø 7.2
Ø 4.2
2 M4 USEFUL
DEPTH: 8
10.5
26 ± 1
Ø 21
60
6
RPS 500A
73
56
57
Ø 7.2
Ø 4.2
2 M4 USEFUL
DEPTH: 8
10.5
26 ± 1
Ø 21
60
6
38.1
35.8
* Tolerances unless stated: ± 0.2 mm
Mechanical Protection Insulated case
Substrate Alumina onto base of
nickel coated copper
Resistive Element
Cermet
End Connections Screws M4 (M5 on
request)
Tightening Torque on Connections 2 Nm
Tightening Torque on Heatsink 4 Nm
Weight 250 g ± 10 %
Temperature Range - 55 °C to + 125 °C
ELECTRICAL SPECIFICATIONS
Resistance Range 0.24 to 1M E24 series
Tolerances ± 1 % to ± 10 %
Rated Power (Pr
70
)
Chassis Mounted at 70 °C
(Case Temperature)
500 W continuous load
Thermal Resistance of the
Component
R
th(j-c)
: 0.11 °C/W
Temperature Coefficient, TC
± 300 ppm/°C < 1 Ω
± 150 ppm/°C > 1 Ω
Limiting Element Voltage U
L
5 kV
RMS
Dielectric Strength
(1)
L: 7 kV
RMS
- H: 12 kV
RMS
MIL STD 202 Method 301:
1 min/10 mA max.
Insulation Resistance
> 10
6
MΩ under U
ins
= 500 V
DC
IEC 60115-1
Inductance < 50 nH