FNR2E-0R025F1 Datasheet, PDF (2/2 Pages) Riedon Powertron – Foil Power Resistors

FPR FNR 2-T227 4-T227
Foil Power Resistors
SPECIFICATIONS (continued)
Temperature Coefficient
table A
4000
250
2000
+15ppm/°C
200
0
-2000
-15ppm/°C
-4000
Limit 2 (3σ)
-6000
Nominal ∆R/R
Limit 1 (3σ)
-8000
-40
-20
0
20
40
60
80
100
120
140
Temperature (°C)
Derating and Stability
150
100
50
0
2 5 10 20 50 100 200
Resistance Value (mOhm)
120
100
0.5%
80
0.2%
60
0.1%
40
20
0
25
50
85
100
115
Tem perature of the backplate (°C)
Power Rating Notes -
The FPR/FNR Series Foil Resistors must be attached to a suit-
able heatsink. The maximum internal resistor temperature is
130°C for a 0.5% stability part.
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 )
130
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 and Attachment Variations
FPR/FNR 2-T227
FPR/FNR 4-T227
Dimension
mm
A
26
B
38
C
12.7
D
4
E
30
F
15
G
4.1
H
10
I
8
J
4
K
2
L
0.8
M
M4
N
10
O
11.9
tol.
(±mm)
0.5
0.5
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.1
0.2
0.2
inches
1.02
1.50
0.50
0.16
1.18
0.59
0.16
0.39
0.31
0.16
0.08
0.03
M4
0.39
0.47
tol.
(±inches)
0.020
0.020
0.008
0.008
0.008
0.008
0.008
0.008
0.008
0.008
0.008
0.004
0.008
0.008
Riedon Inc.
300 Cypress Avenue

06/13
Alhambra CA 91801
[phone]
[phone]
www.riedon.com