FHR4-2321.

FHR 4-2321
Current Sense Resistors
•
•
•
•
•
0.001 to 50 Ohm
Power Rating to 40Watt
Resistance Tolerances to ±0.1%
TCR to ±15ppm/°C
Very Low Inductive
SPECIFICATIONS
Type
FHR 4-2321
Resistance Range
0.001 to 50 Ohm
Power rating (70°C)
3W
Power Rating with Heat Sink
40W
Max. Pulse Energy
Tolerances:
350J / 500ms
from 0.001 Ohm
from 0.005 Ohm
from 0.01 Ohm
1% / 2% / 5%
0.5% / 1% / 2% / 5%
0.1% / 0.25% / 0.5% / 1% / 2% / 5%
Thermal Resistance
2.0 C/W
Stability (1000h)
0.1% / 0.2% / 0.5%
(depends on stress)
Temperature Coefficient
0.001 to 50 Ohms (Q)
Option 1 (P) upon request for selected values
±25ppm/C (20 to 60°C)
±15ppm/C (20 to 60°C)
other specifications upon request
Insolation Resistance
300 VDC
Max. Current
150 A
Thermal EMF
< 1µV/K
Operating Temperature Range
-40 to 130°C
Resistor Material
CuNiMn-Foil
Substrate
Anodized aluminium
Connector Material
Cu / tinned
Terminals
4
Max Torque
0.8 Nm
Ordering Information
Part Description: Part Type - Resistance - Tolerance - TCR
FHR 4-2321 0.035 Ohms 0.25% Q
Riedon Inc.
02/16
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
∆R/R (ppm)
-2000
-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 The FHR Series Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 130°C.
To specify an appropriate heatsink use the following formula :
Power ( % from
nominal power)
120
0.5%
100
0.2%
80
0.1%
60
RθH = TMAX - ( P x RθR ) - TA
P
40
20
Where:
0
25
50
85
100
115
130
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
Riedon Inc.
02/16
300 Cypress Avenue
tol.
(±mm)
inches
tol.
(±inches)
Dimension
mm
A
17.25
±0.2
0.68
±0.008
B
22.30
±0.2
0.88
±0.008
C
3.20
±0.1
0.13
±0.004
D
Ø3.20
±0.1
Ø0.13
±0.004
E
16.75
±0.008
0.66
±0.2
F
7.62
±0.008
0.30
±0.2
G
17.78
±0.008
0.70
±0.2
H
1.50
±0.2
0.06
±0.008
I
1.10
±0.008
0.04
±0.2
J
2.00
±0.004
0.08
±0.1
K
3.00
±0.004
0.12
±0.1
L
8.00
±0.008
0.31
±0.2
M
3.00
±0.008
0.12
±0.2
N
1.50
±0.004
0.06
±0.1
O
4.50
±0.004
0.18
±0.1
P
3.75
±0.008
0.15
±0.2
Q
0.80
±0.1
0.03
±0.004
R
2.10
±0.008
0.08
±0.2
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
Page 28