D2TO020CR0470FTE3 Vishay, D2TO020CR0470FTE3 Datasheet - Page 3
![RESISTOR, THICK FILM, 0.047OHM, 20W, 1%](/photos/26/15/261508/4684251_sml.jpg)
D2TO020CR0470FTE3
Manufacturer Part Number
D2TO020CR0470FTE3
Description
RESISTOR, THICK FILM, 0.047OHM, 20W, 1%
Manufacturer
Vishay
Series
D2TO20r
Type
Surface Mounted Power Resistor Thick Film Technologyr
Datasheet
1.D2TO020C10000FTE3.pdf
(5 pages)
Specifications of D2TO020CR0470FTE3
Resistance
0.047ohm
Resistance Tolerance
± 1%
Power Rating
20W
Resistor Element Material
Thin Film
Resistor Case Style
TO-263 (D2PAK)
Temperature Coefficient
± 700ppm/°C
Tolerance
1 %
Package / Case
TO-263
Product
Thick Film Resistors SMD
Operating Temperature Range
- 55 C to + 150 C
Dimensions
8.8 mm W x 10.1 mm L x 4.5 mm H
Termination Style
SMD/SMT
Voltage Rating
250 Volts
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
D2TO020CR0470FTE3
Manufacturer:
Vishay
Quantity:
50
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
sfer@vishay.com
]
10
1 ( )
-3
10
-2
10
-1
Document Number: 51055
Revision: 30-Apr-10