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DTO25
Vishay Sfernice
DIMENSIONS in millimeters
Preliminary
Surface Mounted Power Resistor
Thick Film Technology
FEATURES
• 25 W at 25 °C case temperature
• Surface mounted resistor - TO-252 (D-PAK) style
package
• Wide resistance range: 0.016 Ω to 700 kΩ
• Non inductive
• RoHS compliant
• Resistor isolated from metal tab
• Solder reflow secure at 270 °C/10 s, MSL = 1
8.2
1
7.3
1.4
0.8
0.8
0.13
1.8
0.6
1.6
MECHANICAL SPECIFICATIONS
Mechanical Protection Molded
Resistive Element Thick film
Substrate Alumina
Connections Tinned copper
Weight 2 g max.
DIMENSIONS
Standard Package TO-252 style (D-PAK)
ENVIRONMENTAL SPECIFICATIONS
Temperature Range - 55 °C to + 150 °C
Climatic Category 55/150/56
2.8
6.35
10°
6.824.1
12.4
5.08
8.513.81
1.78
2.54
1.65 1.65
ELECTRICAL SPECIFICATIONS
Resistance Range 0.016 Ω to 700 kΩ
Tolerances
Power Rating and
Thermal Resistance
Temperature Coefficient See Special Features table
Standard ± 150 ppm/°C
Limiting Element Voltage U
Dielectric Strength
IEC 60115-1
Insulation Resistance ≥ 10
Inductance ≤
Critical Resistance 1.6 kΩ
L
± 1 % to ± 10 %
from 0.016 Ω to 0.049 Ω only
± 5 % and ± 10 % available
25 W at + 25 °C
case temperature
R
TH (j - c)
1500 V
RMS
(between terminals and board)
7.87
2.54
: 5 °C/W
200 V
- 1 min - 15 mA
max.
4
MΩ
0.1 µH
www.vishay.com For technical questions, contact: sfer@vishay.com
14 Revision: 19-Jan-09
Document Number: 51054
Preliminary
DTO25
Surface Mounted Power Resistor
Vishay Sfernice
Thick Film Technology
SPECIAL FEATURES
Resistance Values ≥ 0.016 ≥ 0.1 ≥ 0.5
Typical Temperature Coefficient
(- 55 °C to + 150 °C)
PERFORMANCE
TESTS CONDITIONS REQUIREMENTS
Momentary Overload
Rapid Temperature Change
Load Life
Humidity (Steady State)
Vibration
Shear (Adhesion) Test
Substrate Bending Test
± 800 ppm/°C ± 250 ppm/°C ± 150 ppm/°C
IEC 60115-1 § 4.13
1.5 Pr/5 s
Us ≤ 1.5 U
IEC 60115-1
Te s t s N a
5 cycles - 1 h
- 55 °C to + 150 °C
IEC 60115-1
1000 h Pr at + 25 °C case temperature
IEC 60115-1
IEC 60068-2-3
Test Ca: 56 days RH 95 % 85 °C
IEC 60115-1
IEC 60068-2-6
Test Fc: 10 to 2000 Hz
IEC 60115-1
IEC 60068-2-21
Test Ue3/Shear: 5 N/10 s
IEC 60115-1
IEC 60068-2-21
Test Ue1: 2 mm/3 times
L
± (0.25 % + 0.005 Ω)
± (0.5 % + 0.005 Ω)
± (1 % + 0.005 Ω)
± (0.5 % + 0.005 Ω)
± (0.2 % + 0.005 Ω)
No visible damage
± (0.25 % + 0.005 Ω)
POWER RATING CHART
The temperature of the case should be maintained within the limits specified.
100
80
60
40
% OF RATED DISSIPATION
20
0
0
50
25
CASE TEMPERATURE IN °C
100 150 200
ASSEMBLY SPECIFICATIONS
For the assembly on board, we recommend the lead (Pb)-free thermal profile as per J-STD-020C
TESTS CONDITIONS REQUIREMENTS
IEC 60115-1
Resistance to Soldering Heat
Moisture Sensitivity Level (MSL)
Document Number: 51054 For technical questions, contact: sfer@vishay.com
Revision: 19-Jan-09 15
IEC 60068-2-58
Solder Bath method: 270 °C/10 s
IPC/JEDEC J-STD-020C
85 °C/85 % RH/168 h
± (0.5 % + 0.005 Ω)
+ Pass requirements of TCR
Overload and Dielectic Strength after MSL
Level: 1
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DTO25
Preliminary
Vishay Sfernice
Surface Mounted Power Resistor
Thick Film Technology
CHOISE 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 exceed 150 °C. The dissipated power is simply calculated by the following ratio:
------------------------------------------------------------- --
P
=
[]R
R
P: Expressed in W
ΔT: Difference between maximum working temperature and room temperature
R
: Thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal
TH (j - c)
resistance of the component: 5 °C/W.
R
TH (c - a )
: 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.
R
Thermal resistance R
for DTO25 power rating 3 W at ambient temperature + 25 °C.
TH (c - a)
TH (j - c)
: 5 °C/W
Considering equation (1) we have:
ΔT = 150 °C - 25 °C = 125 °C
R
TH (j - c)
R
TH (c - a)
+ R
= 41.7 °C/W - 5 °C/W = 36.7 °C/W
= ΔT/P = 125/3 = 41.7 °C/W
TH (c - a)
ACCIDENTAL OVERLOAD
In any case the applied voltage must be lower than the maximum overload voltage of Us = 375 V. The values indicated on the
graph below are applicable to resistors onto a board.
100
ΔT
TH (j - c)
ENERGY CURVE
[]+
TH (c - a)
10
1
ENERGY IN J
0.1
0.01
Single Pulse
-7
10
:
-6
10
-5
10
OVERLOAD DURATION IN s
-4
10
-3
10
-2
10
-1
10
0
10
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:
2
U
EP x t
------- x t==
R
with:
E (J): Pulse energy
P (W): Pulse power
t (s): Pulse duration
U (V): Pulse voltage
R (Ω): Resistor
The energy calculated must be less than that allowed by the graph.
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 51054
16 Revision: 19-Jan-09
Preliminary
DTO25
Surface Mounted Power Resistor
Vishay Sfernice
Thick Film Technology
Repetitive or Superimposed Pulses:
The following formula is used to calculate the “equivalent“ energy of a repetitive pulse or the “equivalent energy“ of a pulse on a
resistor that is already dissipating power.
P
a
=
12
⎛⎞
------+
⎝⎠
P
r
12.5
) must not exceed the
a
24
EcE x 1
with:
Ec (J): Equivalent pulse energy
E (J): Known pulse energy
: Resistor power rating
P
r
Pa: Mean power being dissipated
The energy calculated must be less than that allowed by the graph and the average power dissipated (P
continuous power of resistor.
PACKAGING
• Reel
• Tube
• Tape dimensions (mm) for reel:
2.9
8.51
MARKING
Model, Style, Resistance Value (in Ω), Tolerance (in %), Manufacturing Date, Vishay Trademark
ORDERING INFORMATION
DTO 25 C 100 kΩ ± 1 % XXX e3
MODEL STYLE CONNECTIONS RESISTANCE
VAL UE
TOLERANCE CUSTOM DESIGN LEAD (Pb)-FREE
F = ± 1 %
G = ± 2 %
J = ± 5 %
K = ± 10 %
Optional on request:
shape, etc
GLOBAL PART NUMBER INFORMATION
25C100 2 R 3T OD 0FE
GLOBAL
MODEL
DTO 25 C = Surface mount The first four digits are
Document Number: 51054 For technical questions, contact: sfer@vishay.com
Revision: 19-Jan-09 17
SIZE LEADS OHMIC VALUE TOLERANCE PACKAGING
R = Reel
500 pieces
T = Tube
50 pieces
significant figures and the
last digit specifies the
number of zeros to follow.
R designates decimal point.
48R70 = 48.7 Ω
48701 = 48 700 Ω
10002 = 100 000 Ω
R0100 = 0.01 Ω
R6800 = 0.68 Ω
27000 = 2700 Ω = 2K7 Ω
F = 1 %
G = 2 %
J = 5 %
K = 10 %
LEAD (Pb)-FREE
E3 = Pure tin
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Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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