RTO 20
www.vishay.com
Vishay Sfernice
Revision: 18-Sep-15
1
Document Number: 50005
For technical questions, contact: sferfixedresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
20 W Power Resistor, Thick Film Technology, TO-220
The well known TO-220 package is compact and easy to
mount.
FEATURES
• 20 W at 25 °C heatsink mounted
• High power dissipation to size ratio
• Wide resistance range from 0.01 to 550 k
• Negligible inductance
• Easy mounting
• TO-220 package: Compact and easy to mount
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
Two versions of this thick film resistor are available:
• A radial leaded version for PCB mounting
• A flat lead version for surface mounting
Note
• Tolerances unless stated: ± 0.4 mm
Note
(1)
E24 series
Note
• Not compatible with RoHS reflow profile.
DIMENSIONS in millimeters
STANDARD ELECTRICAL SPECIFICATIONS
MODEL SIZE
RESISTANCE
RANGE
RATED POWER
P
25 °C
W
LIMITING ELEMENT
VOLTAGE U
L
V
TOLERANCE
± %
TEMPERATURE
COEFFICIENT
± ppm/°C
CRITICAL
RESISTANCE
RTO 20 TO-220 0.010 to 550K
(1)
20 500 1, 2, 5, 10 150 12.5K
RTO 20F - LEADED
4.5
1.3
8.8
Ø 0.8
10.1
13.7
12.5
5.08
15
Ø 3.6
2.5
RTO 20C - FOR SURFACE MOUNTING
4.5
1.3
8.8
10.1
12.5
5.08
15
Ø 3.6
0.3
1.6
3
2
• Only for RTO 20 version C = during surface mount soldering temperature profile
must not cause the metal tab of this device to exceed 220 °C.
MECHANICAL SPECIFICATIONS
Mechanical Protection Insulated case
Resistive Element Thick film
Substrate
Alumina onto base of nickel coated
copper
Connections Tinned copper
Weight 2.2 g max.
ENVIRONMENTAL SPECIFICATIONS
Temperature Range -55 °C to 155 °C
Climatic Category 55/155/56
Sealing Sealed container, solder immersion
Flammability
IEC 60695-11-5
2 applications 30 s
separated by 60 s
TECHNICAL SPECIFICATIONS
Dissipation and
Associated
Onto a heatsink
Thermal Resistance
and Nominal Power
20 W at + 25 °C
R
TH (j - c)
: 6.5 °C/W
Free air:
2 W at +25 °C
Dielectric Strength
MIL STD 202
2000 V
RMS
- 1 min - 10 mA max.
(between terminals and heatsink)
Insulation Resistance 10
6
M
Inductance 0.1 μH
DIMENSIONS
Standard Package TO-220 insulated case