unr4-3825 Willow Technologies Ltd, unr4-3825 Datasheet
unr4-3825
Manufacturer Part Number
unr4-3825
Description
High Stability Resistors
Manufacturer
Willow Technologies Ltd
Datasheet
1.UNR4-3825.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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• • • • • 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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unr4-3825 Summary of contents
Page 1
... Specially designed for applications with fast changing electrical load. Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK Tel (0) 1342 835234, Fax (0) 1342 834306, e-mail • • • • • High Stability • • • • • Near Temperature Independency • ...
Page 2
... DIMENSIONS USR/UNR 4-3425 HOW TO ORDER UNR 4-3425 1R0 D 0.1% TK1 Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK Tel (0) 1342 835234, Fax (0) 1342 834306, e-mail Tem perature (° 100 115 Temperature of the backplate (° ...