USR UNR 4-4020
•
Nearly Temperature
Independent
•
Minimum Tolerance
•
Low Capacity and
Inductance
•
Customized Resistor Values
•
Highest Stability
SPECIFICATIONS
ELEKTRICAL
Resistance Range
:
USR 4-4020
UNR 4-4020
note
1)
Power Rating
:
0R05 ... 500R
0R05 ... 500R
other resistance values upon request /
power rating depending on resistor value
2.5 W (70°C) without heatsink
30 W*
50 W*
* with heatsink
3.6 K/W
2.2 K/W
Thermal Resistance Rthj-c :
Tolerances
from 0R05
from 10R
from 50R
Stability
:
:
:
:
:
0.1%, 0.25%, 0.5%, 1%
0.05%, 0.1%, 0.25%, 0.5%, 1%
0.01%, 0.02%, 0.05%, 0.1%, 0.25%, 0.5%, 1%
0.01%
max. ±5 ppm/K (-55...155)°C
typ. ±3 ppm/K (-55...125)°C
upon request ±1 ppm/K (0...60)°C
750 VDC
15 A
<1 µV/K
Temperature Coefficient :
Voltage Proof
Max. Current
Thermal EMF
:
:
:
15 A
ENVIRONMENTAL
Operating Temperature Range
:
-55°C...155°C
:
NiCr-Foil
Substrate
:
Al
2
O
3
Housing
:
Epoxy + Al-heatsink
Connector Material
:
Cu, tinned, 4-pin
Max. torque backplate
:
1.0 Nm
1)
note : Specially designed for applications with fast changing electrical load.
MECHANICAL
Resistor Material
AlN
Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK
Tel. + 44 (0) 1342 835234, Fax. + 44 (0) 1342 834306, e-mail
sales@willow.co.uk
web
www.willow.co.uk
WILLOW [ WILLOW TECHNOLOGIES LTD ]
