USR4-T221 [TELEDYNE]
Highest Stability Near Temperature Independent; 稳定性最高温度接近独立
| 型号： | USR4-T221 |
| 厂家： | 
TELEDYNE TECHNOLOGIES INCORPORATED |
| 描述： | Highest Stability Near Temperature Independent |
| 文件： | 总2页 (文件大小：103K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
USR UNR 4-T220 4-T220B 4-T221
USS UNS 4-T220
•
Highest Stability
• Near Temperature
Independent
• Lowest Tolerances
• Low Capacitance and
Inductance
• High Power
• Available also 2-pin version
SPECIFICATIONS
ELEKTRICAL
USR 4-T220
UNR 4-T220
note1)
Resistance range
Nominal power
:
:
0R2...80R
0R2...80R
1.5 W (70°C) without heatsink
10 W*
15 W*
* with heatsink
10.8 K/W
Thermal Resistance Rthj-c :
6.8 K/W
Tolerances
from 0R5
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%
Temperature coefficient :
max. ±5 ppm/K (-55...155)°C
typ. ±3 ppm/K (-55...125)°C
upon request ±1 ppm/K (0...60)°C
1 kVDC
Voltage Proof
Thermal EMF
:
:
< 1 µV/K
ENVIRONMENTAL
Operating Temperature Range
:
-55°C...155°C
NiCr-Foil
Al2O3
Epoxy + heatsink Cu nickel plated
Cu, tinned, 4-pin
1.0 Nm
MECHANICAL Resistor Material
Substrate
:
:
:
:
:
AlN
Housing
Connector Material
Max. torque backplate
note1): Specially designed for applications with fast changing electrical load.
TEMPERATURE COEFFICIENT
600
+5 ppm/K
400
-5 ppm/K
200
0
Nominal-Spread
+/-2,3 ppm/K
+2,2 ppm/K
-200
-1,8 ppm/K
Nominal-dR/R
-400
-600
Nominal-Spread
+/ -2,3 ppm / K
100
0
25
50
75
125
-50
-25
Temperature (°C)
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
USR UNR 4-T220 4-T220B 4-T221
USS UNS 4-T220
DERATING CURVE
120
100
80
60
40
20
0
25
50
85
100
115
130
145
155
Temperature of the backplate (°C)
DIMENSIONS
USR 4-T220
UNR 4-T220
Housing for special demands and
small quantities
USR 4-T220B / UNR 4-T220B
USR 4-T221 / UNR 4-T221
USS 4-T220 / UNS 4-T220
Dimensions in mm
HOW TO ORDER
USR 4-T220 0R5 D 0.25% TK5
UNR 4-T220B 50R D 0.1% TK1
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
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