D2TO020C22R00FTE3 Vishay, D2TO020C22R00FTE3 Datasheet - Page 3

• Manufacturer Part Number: D2TO020C22R00FTE3
• Description: RESISTOR, THICK FILM, 22OHM, 20W, 1%
• Manufacturer: Vishay
• Series: D2TO20r

Specifications of D2TO020C22R00FTE3

• Resistance: 22ohm
• Resistance Tolerance: ± 1%
• Power Rating: 20W
• Resistor Element Material: Thick Film
• Resistor Case Style: TO-263 (D2PAK)
• Temperature Coefficient: ± 150ppm/°C
• Tolerance: 1 %
• Termination Style: SMD/SMT
• Package / Case: TO-263
• Voltage Rating: 250 Volts
• Operating Temperature Range: - 55 C to + 150 C
• Dimensions: 8.8 mm W x 10.1 mm L x 4.5 mm H
• Product: Thick Film Resistors SMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

www.vishay.com
20
D2TO20
Vishay Sfernice
CHOICE OF THE BOARD
The user must choose the board according to the working conditions of the component (power, room temperature). Maximum
working temperature must not exeed 155 °C. The dissipated power is simply calculated by the following ratio:
P:
ΔT:
R
R
Example:
R
Thermal resistance R
Considering equation (1) we have:
ACCIDENTAL OVERLOAD
In any case the applied voltage must be lower than the maximum overload voltage of 375 V. The values indicated on the graph
below are applicable to resistors in air or mounted onto a board.
ENERGY CURVE
Single Pulse:
These informations are for a single pulse on a cold resistor at 25 °C (not already used for a dissipation) and for pulses of 100 ms
maximum duration.
The formula used to calculate E is:
with:
The energy calculated must be less than that allowed by the graph.
TH (j - c)
TH (c - a )
TH (c - a)
E (J):
P (W): Pulse power
t (s):
U (V): Pulse voltage
R (Ω): Resistor
:
:
for D2TO20 power rating 2.5 W at ambient temperature + 25 °C.
Pulse energy
Pulse duration
Expressed in W
Difference between maximum working temperature and room temperature
Thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal
resistance of the component: 6.5 °C/W.
Thermal resistance value measured between outer side of the resistor and room temperature. It is the thermal
resistance of the solder layer (according the quality of the soldering) and the thermal resistance of the board.
ΔT = 155 °C - 25 °C = 130 °C
R
R
TH (j - c)
TH (c - a)
TH (j - c)
+ R
= 52 °C/W - 6.5 °C/W = 45.5 °C/W
TH (c - a)
: 6.5 °C/W
= ΔT/P = 130/2.5 = 52 °C/W
0.01
100
0.1
10
1
10
-7
For technical questions, contact:
Surface Mounted Power Resistor
10
Thick Film Technology
-6
P
=
OVERLOAD DURATION IN s
-------------------------------------------------------------- -
[
R
TH (j - c)
E
10
-5
=
P x t
]
ΔT
+
[
10
R
=
TH (c - a)
-4
U
------ - x t
R
2
[e-mail]
]
10
1 ( )
-3
10
-2
10
-1
Document Number: 51055
Revision: 30-Apr-10