UT Series
SiliconeꢀCoatedꢀPowerꢀResistors
• Resistances from 0.005 to 260kOhms
• Power Rating 0.1 to 13Watts
• Resistance Tolerances to ± 0.01%
• Low TCR: ± 20ppm/K Standard
• MIL-R-26 / MIL-R-39007 Power Ratings
• Temperature Range: -55°C to +350°C ( “V” Rating )
• Non-Inductive Windings Available
SPECIFICATIONS
Specification
Value
Tolerances
±0.01%ꢀtoꢀ±10%ꢀ(ꢀ1%ꢀStandardꢀ)
Temperature Coefficient
>10Wꢀ:ꢀ±20ppm/K
1Wꢀto10Wꢀ:ꢀ±50ppm/K
<1Wꢀ:ꢀCallꢀFactory
TemperatureꢀRange
DielectricꢀStrength
Constuction
-55°Cꢀtoꢀ+250°Cꢀ:ꢀCharacteristicꢀU
-55°Cꢀtoꢀ+350°Cꢀ:ꢀCharacteristicꢀV
500ꢀVACꢀ:ꢀUT-1ꢀ/ꢀUT-1/2Aꢀ/ꢀUT-1/2ꢀ/ꢀUT-1A
1000ꢀVACꢀ:ꢀAllꢀOthers
Centerlessꢀgroundꢀceramicꢀcore
Tinnedꢀcopperꢀorꢀcopperweldꢀleads
Highꢀtemperatureꢀ/ꢀtrivalentꢀ/ꢀinorganicꢀSiliconeꢀcoating
Allꢀweldedꢀterminations
DR
EnvironmentalꢀPerformance
(MIL-STDꢀ202)
CharacteristicꢀU
±0.2%ꢀ+ꢀ0.05W
±1%ꢀ+ꢀ0.05W
CharacteristicꢀV
Dielectric
±0.2%ꢀ+ꢀ0.05W
±3%ꢀ+ꢀ0.05W
±2%ꢀ+ꢀ0.05W
±2%ꢀ+ꢀ0.05W
±2%ꢀ+ꢀ0.05W
±2%ꢀ+ꢀ0.05W
±0.2%ꢀ+ꢀ0.05W
±0.2%ꢀ+ꢀ0.05W
LoadꢀLife
Storage
±0.2%ꢀ+ꢀ0.05W
±0.2%ꢀ+ꢀ0.05W
±0.2%ꢀ+ꢀ0.05W
±0.2%ꢀ+ꢀ0.05W
±0.1%ꢀ+ꢀ0.05W
±0.1%ꢀ+ꢀ0.05W
MoistureꢀResistance
ThermalꢀShock
5XꢀOverloadꢀ(ꢀ5sꢀ)
Shock
Vibration
PowerꢀDeratingꢀCurve
120
100
80
60
40
20
0
0
50
100
150
200
250
300
350
400
AmbientꢀTemperatureꢀ(°C)
Ordering Information
ForꢀNon-InductiveꢀWindingsꢀ/ꢀinsertꢀtheꢀletterꢀ“N”ꢀ(ꢀi.e.ꢀUTN-5ꢀ)
PartꢀNumberꢀ-ꢀResistanceꢀ-ꢀToleranceꢀ-ꢀTCRꢀ(ꢀIfꢀnotꢀstandardꢀ)
Example:ꢀUT-5ꢀ25kOhmsꢀ0.1%
Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, United Kingdom.
ꢀ
ꢀ + 44 (0) 1342 834306 info@willow.co.uk
http://www.willow.co.uk
ꢀ
+ 44 (0) 1342 835234
ꢀ ꢀ
ꢀ ꢀ
ꢀ
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rev.ꢀ03/2006A
TELEDYNE [ TELEDYNE TECHNOLOGIES INCORPORATED ]
