unr4-4020 Willow Technologies Ltd, unr4-4020 Datasheet
unr4-4020
Manufacturer Part Number
unr4-4020
Description
Highest Stability Resistors
Manufacturer
Willow Technologies Ltd
Datasheet
1.UNR4-4020.pdf
(2 pages)
SPECIFICATIONS
ELEKTRICAL
ENVIRONMENTAL
MECHANICAL
note
USR UNR 4-4020
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
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
• • • • •
• • • • • Low Capacity and
• • • • • Nearly Temperature
• • • • • Minimum Tolerance
• • • • • Customized Resistor Values
Independent
Highest Stability
Inductance
USR 4-4020
0R05 ... 500R
other resistance values upon request /
power rating depending on resistor value
2.5 W (70°C) without heatsink
30 W*
* with heatsink
3.6 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 + Al-heatsink
Cu, tinned, 4-pin
1.0 Nm
2
O
sales@willow.co.uk
3
web
www.willow.co.uk
note
0R05 ... 500R
UNR 4-4020
1)
50 W*
2.2 K/W
15 A
AlN
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unr4-4020 Summary of contents
Page 1
... Max. torque backplate 1) note : 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 • • • • • Highest Stability • • • • • Nearly Temperature Independent • ...
Page 2
... DIMENSIONS HOW TO ORDER USR 4-4020 0R3 D 0.25% TK3 Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK Tel (0) 1342 835234, Fax (0) 1342 834306, e-mail Tem perature (°C) 85 100 115 130 Temperature of the backplate (°C) from R ≤ ...