UNR4-T220 WILLOW [Willow Technologies Ltd], UNR4-T220 Datasheet
UNR4-T220
Manufacturer Part Number
UNR4-T220
Description
Highest Stability Near Temperature Independent
Manufacturer
WILLOW [Willow Technologies Ltd]
Datasheet
1.UNR4-T220.pdf
(2 pages)
SPECIFICATIONS
ELEKTRICAL
ENVIRONMENTAL
MECHANICAL
note
TEMPERATURE COEFFICIENT
Tel. + 44 (0) 1342 835234, Fax. + 44 (0) 1342 834306, e-mail
USR UNR 4-T220 4-T220B 4-T221
USS UNS 4-T220
1)
: Specially designed for applications with fast changing electrical load.
Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK
-200
-400
-600
600
400
200
Operating Temperature Range
+2,2 ppm/K
0
-5 ppm/K
Thermal Resistance Rthj-c :
Resistor Material
Resistance range
Nominal power
Tolerances
Stability
Temperature coefficient :
Voltage Proof
Thermal EMF
Substrate
Housing
Connector Material
Max. torque backplate
-50
from 0R5
from 10R
from 50R
-25
0
Tem perature (°C)
25
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
• • • • • High Power
• • • • •
• • • • • Available also 2-pin version
• • • • • Near Temperature
• • • • • Lowest Tolerances
• • • • • Low Capacitance and
50
Highest Stability
Inductance
Independent
USR 4-T220
0R2...80R
1.5 W (70°C) without heatsink
10 W*
* with heatsink
10.8 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
1 kVDC
< 1 µV/K
-55°C...155°C
NiCr-Foil
Al
Epoxy + heatsink Cu nickel plated
Cu, tinned, 4-pin
1.0 Nm
sales@willow.co.uk
2
O
3
75
100
web
125
-1,8 ppm/K
www.willow.co.uk
+5 ppm/K
UNR 4-T220
note
0R2...80R
15 W*
6.8 K/W
AlN
No minal-Spread
No minal-dR/R
No minal-Spread
+/-2,3 ppm/K
+/-2,3 ppm/K
1)
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UNR4-T220 Summary of contents
Page 1
USR UNR 4-T220 4-T220B 4-T221 USS UNS 4-T220 SPECIFICATIONS ELEKTRICAL Resistance range Nominal power Thermal Resistance Rthj-c : Tolerances from 0R5 from 10R from 50R Stability Temperature coefficient : Voltage Proof Thermal EMF ENVIRONMENTAL Operating Temperature Range MECHANICAL Resistor Material ...
Page 2
USR UNR 4-T220 4-T220B 4-T221 USS UNS 4-T220 DERATING CURVE 120 100 DIMENSIONS USR 4-T220B / UNR 4-T220B USS 4-T220 / UNS 4-T220 HOW TO ORDER USR 4-T220 0R5 D 0.25% TK5 Willow ...