NPS 2-T126
Powertron
•
•
•
•
•
•
•
Resistances from 0.025Ohm to 10kOhms
Power Rating to 25Watt
Resistance Tolerances to ±1%
TCR to ±100ppm/K
Load Stability to 0.5%
TO-126 Housing (D-Pak)
Solder Reflow Secure at 260°C / 20s
SPECIFICATIONS
Type
Terminals
Resistance Range
Power Rating
(with heatsink)
Thermal Resistance Rthj-c
Tolerances
(others upon request)
Stability
Temperature Coefficient
(TCR 50ppm upon request)
Voltage Proof
Operating Temperature
Resistor Material
Substrate
Housing
Connector Material
Reflow soldering
±500 ppm/K
±400 ppm/K
2.0 kV DC
-40°C to 175°C
Thick Film
Al
2
O
3
Epoxy
Cu / Ni-flash / lead-free tinned
lead-free soldering 260°C / 20s
2% / 5%
0.5%
±300 ppm/K
±100 ppm/K
0.025 to 0.049Ohms
0.05 to 0.099Ohms
25 W
6.0 K/W
1% / 2% / 5%
NPS 2-T126
2
0.1 to 0.99Ohms
1Ohms to 10kO-
hms
Ordering Information
Part Number - Resistance - Tolerance
NPS 2-T126 1.1 Ohms 1%
Document Number: 64214
Revision: 20-09-10
For technical questions, contact:
powertron@vishaypg.com
www.powertron.de
1
NPS 2-T126
Powertron
SPECIFICATIONS
(continued)
Derating
120
Power Rating Notes -
100
Power (% from nominal power)
80
The NPS Series Resistors must be attached to a suitable heat-
sink. The maximum internal resistor temperature is 175°C.
To specify an appropriate heatsink use the following formula :
60
R
qH
= T
MAX
- ( P x R
qR
) - T
A
P
Where:
R
qH
= Thermal Resistance of Heatsink ( K/W )
R
qR
= Thermal Resistance of Resistor ( K/W )
T
MAX
= Maximum Temperature of Resistor
T
A
= Ambient Temperature of Heatsink ( °C )
P = Power Through Resistor ( W )
40
20
0
0
25
40
55
70
85
100
115
130
145
155
175
Temperature of the backplate (°C)
Dimensions
Dimension
A
B
C
D
E
F
G
H
I
J
K
L
M
N
mm
8.26
8.13
6.35
4.31
1.35
5.08
0.76
2.79
0.8
9.55
10.92
12.32
0.6
1.47
tol.
(±mm)
0.2
0.2
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.1
0.1
inches
0.33
0.32
0.25
0.17
0.05
0.20
0.03
0.11
0.03
0.38
0.43
0.49
0.02
0.06
tol.
(±inches)
0.008
0.008
0.004
0.004
0.004
0.004
0.004
0.004
0.004
0.008
0.008
0.008
0.004
0.004
Dimension
A
B
C
D
E
F
mm
8.51
7.87
14.1
5.08
1.65
3.81
inches
0.335
0.310
0.555
0.200
0.065
0.150
www.powertron.de
2
For technical questions, contact:
powertron@vishaypg.com
Document Number: 64214
Revision: 20-09-10
Legal Disclaimer Notice
Vishay Precision Group
Disclaimer
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their
behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or
incompleteness contained herein or in any other disclosure relating to any product.
The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and conditions of
purchase, including but not limited to, the warranty expressed therein.
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and conditions of purchase.
To the maximum extent permitted by applicable law, Vishay Precision Group
disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability,
including without limitation special, consequential or incidental damages, and (iii) any and all implied
warranties, including warranties of fitness for particular purpose, non-infringement and merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different applications
and performance may vary over time. Statements regarding the suitability of products for certain types of
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properties described in the product specification is suitable for use in a particular application.
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Document No.: 63999
Revision: 27-Apr-11
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1
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