UNR4-3425 WILLOW [Willow Technologies Ltd], UNR4-3425 Datasheet
UNR4-3425
Manufacturer Part Number
UNR4-3425
Description
High Stability Near Temperature Independency
Manufacturer
WILLOW [Willow Technologies Ltd]
Datasheet
1.UNR4-3425.pdf
(2 pages)
SPECIFICATIONS
ELECTRICAL
ENVIRONMENTAL
MECHANICAL
note
USR UNR 4-3425 4-3825 4-3825H
Tel. + 44 (0) 1342 835234, Fax. + 44 (0) 1342 834306, e-mail
1)
: Specially designed for applications with fast changing electrical load.
Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK
Operating Temperature Range
Thermal Resistance Rthj-c :
Resistor Material
Resistance Range
Power Rating
Tolerances
Stability
Temperature Coefficient :
Voltage Proof
Max. Current
Thermal EMF
Substrate
Housing
Connector Material
Max. torque backplate
from 0R05
from 10R
from 50R
:
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:
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• • • • • High Stability
• • • • • Near Temperature
• • • • • Lowest Tolerances
• • • • • Low Capacitance and
• • • • • Customized Resistance
Values
Inductance
Independency
USR 4-3425/3825
with addional heatsink 3825H
0R05 ... 500R
other resistance values upon request /
power rating depending on resistor value
3 W (70°C) without heatsink
5 W (20°C) for 3825H
30 W*
* with heatsink
3.5 K/W
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
-55°C...155°C
NiCr-Foil
Al
Epoxy + heatsink aluminium
Cu, tinned, 4-pin
1.0 Nm
2
sales@willow.co.uk
O
3
web
www.willow.co.uk
UNR 4-3425/3825
note
0R05 ... 500R
50 W*
2.1 K/W
AlN
1)
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UNR4-3425 Summary of contents
Page 1
USR UNR 4-3425 4-3825 4-3825H SPECIFICATIONS ELECTRICAL Resistance Range Power Rating Thermal Resistance Rthj-c : Tolerances from 0R05 from 10R from 50R Stability Temperature Coefficient : Voltage Proof Max. Current Thermal EMF ENVIRONMENTAL Operating Temperature Range MECHANICAL Resistor Material Substrate ...
Page 2
USR UNR 4-3425 4-3825 4-3825H TEMPERATURE COEFFICIENT 600 400 -5 ppm/K 200 0 +2,2 ppm/K -200 -400 -600 -50 -25 DERATING CURVE 120 100 DIMENSIONS USR/UNR 4-3425 HOW TO ORDER UNR 4-3425 1R0 D ...