NPR NPS 2-T220 NHR NHS 2-T220 T221

NPR NPS 2-T220
NHR NHS 2-T220 T221
Power Resistors
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•
•
•
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Resistances from 0.02Ohm to 100kOhms
Power Rating to 50Watt
Resistance Tolerances to ±1%
TCR to ±50ppm/°C
Load Stability to 0.5%
TO-220 Housing
Convenient SMD D2Pak Available
SPECIFICATIONS
Type
Resistance Range
NPR / NPS
NHR / NHS
0.02 Ohms to 100kOhms
0.02 Ohms to 15kOhms
1.5 W
30 W
1.5 W
50 W
3.5 K/W
2.1 K/W
Power rating
free air 70°C
with heatsink
Thermal Resistance Rthj-c
Tolerances
from 0.02 Ohms
from 1.0 Ohms
2% / 5%
1% / 2% / 5%
Stability
0.5%
Temperature Coefficient
0.02 to 0.049 Ohms
0.05 to 0.099 Ohms
0.1 Ohms to 100 kOhms
±600 ppm/°C
±300 ppm/°C
±100 ppm/°C
upon request ±50 ppm/°C
Voltage Proof
2.0 kVDC
Max. Voltage
depending on resistance value
max. working voltage (VDC)
10000
1000
100
10
1
2 Ohm
10 Ohm
Operating Temperature Range
1 kOhm
5 kOhm
10 kOhm 100 kOhm
Thick Film
Substrate
Al2O3
Housing
Epoxy or PPS
Connector Material
Cu tinned
Terminals
2
Max. Torque
07/13
100 Ohm
-40 to 155°C
Resistor Material
Riedon Inc.
1.5 kVDC
T220: 1 Nm
T221: 0.8 Nm
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
Page 80
NPR NPS 2-T220 T221
NHR NHS 2-T220 T221
Power Resistors
SPECIFICATIONS (continued)
Temperature Coefficient
100ppm/°C
∆R/R (ppm)
7000
50ppm/°C
2000
-3000
-8000
-50
-25
0
25
50
75
100
125
Temperature (°C)
Derating
Power ( % from
nominal power)
120
Power Rating Notes The NPR / NHR Series Resistors must be attached to a suitable
heatsink. The maximum internal resistor temperature is 155°C.
To specify an appropriate heatsink use the following formula :
100
80
60
RθH = TMAX - ( P x RθR ) - TA
P
40
20
Where:
0
25
50
85
100
115
130
145
155
Temperature of the backplate (°C)
RθH = Thermal Resistance of Heatsink ( K/W )
RθR = Thermal Resistance of Resistor ( K/W )
TMAX = Maximum Temperature of Resistor
TA = Ambient Temperature of Heatsink ( °C )
P = Power Through Resistor ( W )
Dimensions
NPS / NHS 2-T220
Dimension
mm
tol.
(±mm)
inches
tol.
(±inches)
A
12.70
0.2
0.50
0.008
Dimension
mm
inches
0.008
A
12.10
0.476
0.004
B
11.16
0.439
18.33
0.722
B
C
07/13
0.76
0.2
0.1
0.40
0.03
D
5.08
0.1
0.20
0.004
C
E
4.00
0.1
0.16
0.004
D
5.08
0.200
0.004
E
1.76
0.069
F
3.20
0.126
F
Riedon Inc.
10.16
1.20
0.1
0.05
G
14.60
0.2
0.57
0.008
H
15.00
0.2
0.59
0.008
I
17.33
0.2
0.68
0.008
J
0.40
0.1
0.02
0.004
K
1.85
0.1
0.07
0.004
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
Page 81
NPR NPS 2-T220 T221
NHR NHS 2-T220 T221
Power Resistors
SPECIFICATIONS (continued)
NPR / NHR 2-T220
Dimension
mm
tol.
(±mm)
inches
tol.
(±inches)
0.008
A
17.30
0.2
0.68
B
10.16
0.2
0.40
0.008
C
6.00
0.1
0.24
0.004
D
Ø3.7
0.1
Ø0.146
0.004
E
16.40
0.2
0.65
0.008
F
5.08
0.1
0.20
0.004
G
0.76
0.1
0.03
0.004
H
1.30
0.1
0.05
0.004
I
13.80
0.2
0.54
0.008
J
2.00
0.1
0.08
0.004
K
1.20
0.1
0.05
0.004
L
4.00
0.1
0.16
0.004
M
2.90
0.1
0.11
0.004
N
0.40
0.1
0.02
0.004
O
1.85
0.1
0.07
0.004
mm
tol.
(±mm)
inches
tol.
(±inches)
NPR / NHR 2-T221
Dimension
A
18.30
0.2
0.72
0.008
B
10.16
0.2
0.40
0.008
C
3.70
0.1
0.15
0.004
D
Ø3.2
0.1
Ø0.126
0.004
E
16.40
0.2
0.65
0.008
0.004
F
5.08
0.1
0.20
G
0.76
0.1
0.03
0.004
H
1.30
0.1
0.05
0.004
I
13.80
0.2
0.54
0.008
J
2.00
0.1
0.08
0.004
K
1.20
0.1
0.05
0.004
0.004
L
4.00
0.1
0.16
M
3.90
0.1
0.15
0.004
N
0.40
0.1
0.02
0.004
O
1.85
0.1
0.07
0.004
Ordering Information
Part Description: Part Type - Resistance - Contact - Tolerance
NHR 2-T221 C 1.1 kOhms 1%
Riedon Inc.
07/13
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
Page 82