NPR NHR 2-T220 T221
FEATURES
•
•
•
•
•
•
•
Resistances from 0.02Ohm to 100kOhms
Power Rating to 50Watt
Resistance Tolerances to ±1%
TCR to ±50ppm/K
Load Stability to 0.5%
TO-220 Housing
Convenient SMD D2Pak Available
TABLE 1—SPECIFICATIONS
TYPE
Resistance Range
Power Rating
Free air 70°C
With heatsink
NPR 2-T220
NPR 2-T221
0.02 Ohms to 100kOhms
1.5 W
30 W
2% / 5%
1% / 2% / 5%
3.5 K/W
0.5%
±600 ppm/K
±300 ppm/K
±100 ppm/K
upon request ±50 ppm/K
2.0 kVDC
10000
NHR 2-T220
NHR 2-T221
0.02 Ohms to 15kOhms
50 W
Tolerances
from 0.02 Ohms
from 1.0 Ohms
Thermal Resistance
Stability (1000h)
Temperature Coefficient
0.02 to 0.049 Ohms
0.05 to 0.099 Ohms
0.1 Ohms to 100 kOhms
Voltage Proof
2.1 K/W
1.5 kVDC
max. working voltage (VDC)
1000
Max. Voltage
depending on resistance value
100
10
1
2 Ohm
10 Ohm
100 Ohm
1 kOhm
5 kOhm
10 kOhm 100 kOhm
Operating Temperature Range
Resistor Material
Substrate
Housing
Connector Material
Terminals
Max. Torque
-40 to 155°C
Thick Film
Al
2
O
3
PPS
Cu / tinned
2
T220: 1 Nm
T221: 0.8 Nm
ORDERING INFORMATION
Part Number - Resistance - Contact - Tolerance
NHR 2-T221 1K100 C 1%
Document No.: 64244
Revision: 31-01-2015
For technical questions,
contact
powertron@vpgsensors.com
www.powertron.de
1
NPR NHR 2-T220 T221
FIGURE 1—TEMPERATURE COEFFICIENT
100ppm/K
7000
∆R/R (ppm)
50ppm/K
2000
-3000
-8000
-50
-25
0
Temperature (°C)
25
50
75
100
125
FIGURE 2—DERATING
120
Power ( % from
nominal power)
100
80
60
40
20
0
25
50
85
100
115
130
145
155
Temperature of the backplate (°C)
Power Rating Notes -
The NPR / NHR Series Resistors must be attached to a suit-
able heatsink.
The maximum internal resistor temperature is 155°C.
To specify an appropriate heatsink use the following formula :
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 )
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For technical questions,
contact
powertron@vpgsensors.com
Document No.: 64244
Revision: 31-01-2015
NPR NHR 2-T220 T221
FIGURE 3—DIMENSIONS
in mm (inches)
NPR 2-T220
Dimension
A
±0.2 (±0.008)
B
±0.2 (±0.008)
C
±0.1 (±0.004)
D
±0.1 (±0.004)
E
±0.2 (±0.008)
F
±0.1 (±0.004)
G
±0.1 (±0.004)
H
±0.1 (±0.004)
I
±0.2 (±0.008)
J
±0.1 (±0.004)
K
±0.1 (±0.004)
L
±0.1 (±0.004)
M
±0.1 (±0.004)
N
±0.1 (±0.004)
O
±0.1 (±0.004)
S-contact
C-contact
17.30 (0.68)
10.16 (0.40)
6.00 (0.24)
Ø3.7 (Ø0.146)
16.40 (0.65)
5.08 (0.20)
0.76 (0.03)
1.30 (0.05)
10.00 (0.39) 13.80 (0.54)
2.00 (0.08)
1.20 (0.05)
4.00 (0.16)
2.90 (0.11)
0.40 (0.02)
1.85 (0.07)
NHR 2-T221
Dimension
A
±0.2 (±0.008)
B
±0.2 (±0.008)
C
±0.1 (±0.004)
D
±0.1 (±0.004)
E
±0.2 (±0.008)
F
±0.1 (±0.004)
G
±0.1 (±0.004)
H
±0.1 (±0.004)
I
±0.2 (±0.008)
J
±0.1 (±0.004)
K
±0.1 (±0.004)
L
±0.1 (±0.004)
M
±0.1 (±0.004)
N
±0.1 (±0.004)
O
±0.1 (±0.004)
S-contact
C-contact
18.30 (0.72)
10.16 (0.40)
3.70 (0.15)
Ø3.2 (Ø0.126)
16.40 (0.65)
5.08 (0.20)
0.76 (0.03)
1.30 (0.05)
10.00 (0.39) 13.80 (0.54)
2.00 (0.08)
1.20 (0.05)
4.00 (0.16)
3.90 (0.15)
0.40 (0.02)
1.85 (0.07)
Document No.: 64244
Revision: 31-01-2015
For technical questions,
contact
powertron@vpgsensors.com
www.powertron.de
3
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Vishay Precision Group, Inc.
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Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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1
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