FHR 4-2321
Current Sense Resistors
•
•
•
•
•
•
•
Excellent Long Term Stability
0.001 to 50 Ohm
Power Rating to 40Watt
Resistance Tolerances to ±0.1%
TCR to ±15ppm/°C
Very Low Inductive
Foil Technology
Applications:
Power Modules, Current Monitoring,
Frequency Converters, Switch Mode Power Supplies
SPECIFICATIONS
Type
Resistance Range
Power rating (70°C)
Power Rating with Heat Sink
Tolerances:
from 0.001 Ohm
from 0.01 Ohm
FHR 4-2321
0.001 to 50 Ohm
3W
40W
0.5% / 1% / 2% / 5%
0.1% / 0.25% / 0.5% / 1% / 2% / 5%
2.0 C/W
0.1% / 0.2% / 0.5%
(depends on stress)
±25ppm/C (20 to 60°C)
±15ppm/C (20 to 60°C)
other specifications upon request
300 VDC
150 A
< 1µV/K
-40 to 130°C
CuNiMn-Foil
Anodized aluminium
Cu / tinned
4
0.8 Nm
Thermal Resistance
Stability (1000h)
Temperature Coefficient
0.001 to 50 Ohms
Option 1 upon request for selected values
Insolation Resistance
Max. Current
Thermal EMF
Operating Temperature Range
Resistor Material
Substrate
Connector Material
Terminals
Max Torque
Ordering Information
Part Description: Part Type - Resistance - Tolerance - TCR
FHR 4-2321 0.035 Ohms 0.25% 25ppm
Riedon Inc.
11/17
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
Page 27
FHR
4-2321
Current Sense Resistors
SPECIFICATIONS
(continued)
Temperature Coefficient
2000
0
Limit 2
-2000
∆R/R
(ppm)
-4000
Nominal
∆R/R
-6000
-8000
Limit 1
-10000
-40
-20
0
20
40
60
80
100
120
140
Temperature (°C)
Derating
Power Rating Notes -
120
100
80
60
40
20
0
25
50
85
100
115
130
Temperature of the backplate (°C)
0.1%
0.5%
0.2%
Power ( % from
nominal power)
The FHR Series Resistors must be attached to a suitable heat-
sink. The maximum internal resistor temperature is 130°C.
To specify an appropriate heatsink use the following formula :
R
θH
= T
MAX
- ( P x R
θR
) - T
A
P
Where:
R
θH
= Thermal Resistance of Heatsink ( K/W )
R
θR
= Thermal Resistance of Resistor ( K/W )
T
MAX
= Maximum Temperature of Resistor
T
A
= Ambient Temperature of Heatsink ( °C )
P = Power Through Resistor ( W )
Dimensions
Dimension
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
mm
17.25
22.30
3.20
Ø3.20
16.75
7.62
17.78
1.50
1.10
2.00
3.00
8.00
3.00
1.50
4.50
3.75
0.80
2.10
tol.
(±mm)
±0.2
±0.2
±0.1
±0.1
±0.008
±0.008
±0.008
±0.2
±0.008
±0.004
±0.004
±0.008
±0.008
±0.004
±0.004
±0.008
±0.1
±0.008
inches
0.68
0.88
0.13
Ø0.13
0.66
0.30
0.70
0.06
0.04
0.08
0.12
0.31
0.12
0.06
0.18
0.15
0.03
0.08
tol.
(±inches)
±0.008
±0.008
±0.004
±0.004
±0.2
±0.2
±0.2
±0.008
±0.2
±0.1
±0.1
±0.2
±0.2
±0.1
±0.1
±0.2
±0.004
±0.2
Riedon Inc.
11/17
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
Page 28
嵌入式系统
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