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.
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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.
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purchase, including but not limited to, the warranty expressed therein.
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and conditions of purchase.
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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
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Document No.: 63999
Revision: 27-Apr-11
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