USR 2-0808

USR 2-0808
Precision Foil Resistors
•
•
•
•
•
Resistances from 1Ohm to 150kOhms
Power Rating to 0.6 Watts
Resistance Tolerances to ±0.005%
TCR to ±1ppm/°C
Load Stability to 0.01%
SPECIFICATIONS
Type
USR 2-0808
Resistance Range
1.0 to 150 kOhms
0.6W (<100 kOhms)
0.4W (>100 kOhms)
Power rating (70°C)
Tolerances
from 1.0 Ohms
from 5.0 Ohms
from 12.0 Ohms
from 25.0 Ohms
from 100.0 Ohms
0.5% / 1%
0.05% / 0.1% / 0.25% / 0.5% / 1%
0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1%
0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1%
0.005% / 0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1%
Stability
0.01%
25ppm / ∆R after 1 year
50ppm / ∆R after 3 year
Shelf Life Stability
Temperature Coefficient
max. ±5ppm/°C (-55 to 155°C)
typ. ±3ppm/°C (-55 to 125°C)
upon request ±1ppm/°C (0 to 60°C)
and ±1ppm/°C (-55 to 125°C)
Insolation Resistance
> 10GOhm
Thermal EMF
< 0.1µV/°C
Operating Temperature Range
-55 to 155°C
Resistor Material
NiCr-Foil
Al2O3
Substrate
Housing
PBTP / Epoxy
Connector Material
Cu tinned
Terminals
2
Ordering Information
Part Description: Part Type - Resistance - Grid Type Tolerance - TCR
Example: USR 2-0808 478 kOhms D 0.1% 5ppm
Riedon Inc.
8/15
300 Cypress Avenue
Alhambra CA 91801
Grid D = 3.81mm (0.15inches) Lead Spacing
Grid J = 5.08mm (0.2inches) Lead Spacing
If none specified, Grid D is default
(626) 284-9901
(626) 284-1704
USR 2-0808
Precision Foil Resistors
SPECIFICATIONS (continued)
Derating
Power (% from
nominal power)
120
100
80
60
40
20
0
50
70
85
100
115
130
145
155
Ambient Temperature (°C)
Temperature Coefficient
800
600
+5ppm/°C
-5ppm/°C
∆R/R (ppm)
400
200
Nominal Spread
±2.3ppm/°C
0
-200
Nominal ∆R/R
-400
Nominal Spread
±2.3ppm/°C
-600
-800
-50
-25
0
25
50
100
75
125
Temperature (°C)
DIMENSIONS
Type
USR 2-0808
Grid D
E
USR 2-0808
Grid J
Riedon Inc.
8/15
300 Cypress Avenue
Alhambra CA 91801
Dimension
mm
tol.
(±mm)
inches
tol.
(±inches)
0.079
A
28.30
2.0
1.11
B
7.62
0.1
0.30
0.004
C
8.30
0.2
0.33
0.008
D
2.00
0.1
0.08
0.004
E
3.81
0.1
0.15
0.004
F
2.67
0.1
0.11
0.004
G
Ø0.64
0.1
Ø0.025
0.004
A
28.00
2.0
1.10
0.079
B
7.49
0.1
0.29
0.004
C
8.00
0.2
0.31
0.008
D
2.00
0.1
0.08
0.004
E
5.08
0.1
0.20
0.004
F
2.49
0.1
0.10
0.004
G
Ø0.64
0.1
Ø0.025
0.004
(626) 284-9901
(626) 284-1704