C&H Technology RTO50 - Manual (Page 2)

Document Number: 50035 For technical questions, contact: [email protected] www.vishay.com
Revision: 24-Nov-08 1
RTO 50
Vishay Sfernice
Power Resistor, Thick Film Technology
FEATURE
• 50 W at 25 °C heatsink mounted
• Adjusted by sand trimming
• Leaded or surface mount versions
• High power to size ratio
• Non inductive element
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 50 W 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.
DIMENSIONS in millimeters
MECHANICAL SPECIFICATIONS
Mechanical Protection Molded
Resistive Element Thick Film
Connections Tinned copper alloy
Weight 2.2 g 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
Flammability IEC 60695-11-5
2 applications 30 s
seperated by 60 s
RoHS
COMPLIANT
Only for RTO 50 version C = during surface mount soldering, the
soldering temperature profile must not cause the metal tab of this
device to exceed 220 °C.
4.5
1.3
8.8
Ш 0.8
10.1
13.7
12.5
5.08
15
Ш 3.6
2.5
RTO 50F - LEADED
4.5
1.3
8.8
10.1
12.5
5.08
15
Ø 3.6
0.3 1.6
3
2
RTO 50C - FOR SURFACE MOUNTING
ELECTRICAL SPECIFICATIONS
Resistance Range 0.010
Ω to 550 kΩ serie E24
Tolerances Standard ± 1 % to ± 10 %
Dissipation and Associated Onto a heatsink
Thermal Resistance
and Nominal Power
50 W at + 25 °C
R
TH (j - c)
: 2.6 °C/W
free air:
2.25 W at + 25 °C
Temperature Coefficient
Standard (- 55 °C; + 150 °C) See Performance table
± 150 ppm/°C
Limiting Element Voltage U
L
300 V
Dielectric Strength
MIL STD 202 (301) 2000 V
RMS
- 1 Min
10 mA max.
Insulation Resistance ≥ 10 6 M Ω
Inductance
≤
0.1 µH
Critical Resistance 1.8 k Ω