Datasheet

www.vishay.com
17
RTO 50
Vishay Sfernice
Document Number: 50035
Revision 14-Jan-05
For technical questions, contact [e-mail]
Power Resistor, Thick Film Technology
FEATURES
• 50 Watt at 25°C Heatsink Mounted
• Adjusted by sand trimming
• Leaded or surface mount versions
• High power to size ratio
• Non inductive element
MECHANICAL SPECIFICATIONS
Mechanical Protection Molded
Resistive Element Thick Film
Connections Tinned copper alloy
Weight 2g max.
DIMENSIONS
Standard Package TO 220
Insulated Case
ENVIRONMENTAL SPECIFICATIONS
Temperature Range - 55°C to + 155°C
Climatic Category 55/155/156
Sealing Sealed container
Solder immersion
Because of the knowledge and experience in Thick Film technology, Vishay Sfernice has been able to develop a high power
resistor in a TO 220 package called RTO 50. The special design of this component allows the dissipation of 50W when mounted
on a heatsink. The ohmic value is adjusted by sand trimming. This process does not generate hot spots as in laser trimming,
which could lead to microcracks on each side of the curve. This process improves the reliability and the stability of the resistor
and at the same time gives a good overload capability.
• Tolerance unless otherwise specified: ± 0.4mm
RTO 50F - LEADED RTO 50C - FOR SURFACE MOUNTING
4.5
1.3
8.8
Ø 0.8
10.1
13.7
12.5
5.08
15
Ø 3.6
2.5
4.5
1.3
8.8
10.1
12.5
5.08
15
Ø 3.6
0.3
1.8
3
2
DIMENSIONS in millimeters
Resistance Range 0.010Ω to 1MΩ
Tolerances Standard
± 1% to ± 10%
Dissipation and Associated Onto a heatsink
Thermal Resistance
50W at + 25°C
and Nominal Power RTH (j-c): 2.6°C/W
free air:
2.25W at + 25°C
Temperature Coefficient
See Performance table
Standard ± 150ppm/°C
Limiting Element Voltage 300V
Dielectric Strength
2000VRMS - 1 Minute - 10mA Max
MIL STD 202 (301)
Insulation
Resistance ≥ 10
6
MΩ
Inductance
≤ 0.1 µH
Critical Resistance
1.8 kΩ
ELECTRICAL SPECIFICATIONS