USS2-T220 [RIEDON]
Precision Foil Resistors; 精密箔电阻
| 型号： | USS2-T220 |
| 厂家： | 
RIEDON POWERTRON |
| 描述： | Precision Foil Resistors |
| 文件： | 总3页 (文件大小：354K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
USR UNR 2-T220 / T220B / T221
USS UNS 2-T220
PrecisionꢀFoilꢀResistors
• Resistances from 0.5Ohm to 150kOhms
• Power Rating to 10Watt
• Resistance Tolerances to ±0.01%
• TCR to ±3ppm/K
• Load Stability to 0.01%
• TO-220 Housing
• Convenient SMD D2Pak Available
SPECIFICATIONS
Type
USR / USS
UNR /UNS
ResistanceꢀRange
0.5ꢀOhmsꢀtoꢀ150ꢀkOhms
0.5ꢀOhmsꢀtoꢀ5ꢀkOhms
Powerꢀratingꢀ
ꢀ
ꢀ
ꢀ
ꢀ
freeꢀairꢀ70°Cꢀ(R<50R0)
1.5W
1.0W
10W
6W
1.5W
1.0W
15W
10W
freeꢀairꢀ70°Cꢀ(R>50R0)
withꢀheatsinkꢀ(R<50R0)
withꢀheatsinkꢀ(R>50R0)
ThermalꢀResistanceꢀRthj-c
ꢀ
ꢀ
R<50R0
R>50R0
10.8ꢀK/W
18.8ꢀK/W
6.8ꢀK/W
10.8ꢀK/W
Tolerances
ꢀ
ꢀ
ꢀ
ꢀ
fromꢀ0.5ꢀOhms
0.1%ꢀ/ꢀ0.25%ꢀ/ꢀ0.5%ꢀ/ꢀ1%
0.05%ꢀ/ꢀ0.1%ꢀ/ꢀ0.25%ꢀ/ꢀ0.5%ꢀ/ꢀ1%
0.02%ꢀ/ꢀ0.05%ꢀ/ꢀ0.1%ꢀ/ꢀ0.25%ꢀ/ꢀ0.5%ꢀ/ꢀ1%
0.01%ꢀ/ꢀ0.02%ꢀ/ꢀ0.05%ꢀ/ꢀ0.1%ꢀ/ꢀ0.25%ꢀ/ꢀ0.5%ꢀ/ꢀ1%
fromꢀ10.0ꢀOhms
fromꢀ25.0ꢀOhms
fromꢀ50.0ꢀOhms
Stability
0.01%
ShelfꢀLifeꢀStability
25ppm / ∆R after 1 year
50ppm / ∆R after 3 year
Temperature Coefficient
max.ꢀ±5ppm/Kꢀ(-55ꢀtoꢀ155°C)
typ.ꢀ±3ppm/Kꢀ(-55ꢀtoꢀ125°C)
VoltageꢀProof
ThermalꢀEMF
OperatingꢀTemperatureꢀRange
ResistorꢀMaterial
Substrate
1ꢀkVDC
<ꢀ0.1µV/K
-55ꢀtoꢀ155°C
NiCr-Foil
Al2O3
AlN
Housing
Epoxyꢀ+ꢀCuꢀheatsinkꢀnickelꢀplated
ConnectorꢀMaterial
Terminals
Cuꢀtinned
2
Max.ꢀTorque
1.0ꢀNm
Notes
Speciallyꢀ designedꢀ forꢀ applicationsꢀ withꢀ fastꢀ
changingꢀelectricalꢀload
Ordering Information
PartꢀNumberꢀ-ꢀResistanceꢀ-ꢀContactꢀ-ꢀToleranceꢀ-ꢀTCR
UNRꢀ2-T220Bꢀ5.7kOhmsꢀCꢀ0.5%ꢀ3ppm
Riedon Inc.ꢀ
ꢀ
ꢀ
300ꢀCypressꢀAvenueꢀ
ꢀ
ꢀ
AlhambraꢀCAꢀ91801ꢀ
www.riedon.com
ꢀ(626)ꢀ284-9901ꢀ
ꢀ(626)ꢀ284-1704
Pageꢀ124
ꢀ
ꢀ
ꢀ
ꢀ
rev.ꢀ03/2006A
USRꢀUNR 2-T220ꢀ/ꢀT220Bꢀ/ꢀT221
USSꢀUNS 2-T220
PrecisionꢀFoilꢀResistors
SPECIFICATIONS (continued)
Temperature Coefficient
800
600
400
200
0
+5ppm/K
-5ppm/K
NominalꢀSpread
±2.3ppm/K
-200
-400
-600
-800
Nominal ∆R/R
NominalꢀSpread
±2.3ppm/K
100
0
25
50
75
125
-50
-25
Temperatureꢀ(°C)
Derating
PowerꢀRatingꢀNotesꢀ-
TheꢀU-SeriesꢀResistorsꢀmustꢀbeꢀattachedꢀtoꢀaꢀsuitableꢀheatsink.ꢀ
Theꢀmaximumꢀinternalꢀresistorꢀtemperatureꢀisꢀ155°C.
120
100
80
60
40
20
0
Toꢀspecifyꢀanꢀappropriateꢀheatsinkꢀuseꢀtheꢀfollowingꢀformulaꢀ:
RqHꢀ=ꢀTMAXꢀ-ꢀ(ꢀPꢀxꢀRqRꢀ)ꢀ-ꢀTA
ꢀꢀꢀꢀꢀꢀꢀꢀꢀP
Where:ꢀ RqHꢀ=ꢀThermalꢀResistanceꢀofꢀHeatsinkꢀ(ꢀK/Wꢀ)
ꢀ
ꢀ
ꢀ
ꢀ
RqRꢀ=ꢀThermalꢀResistanceꢀofꢀResistorꢀ(ꢀK/Wꢀ)
TMAXꢀ=ꢀMaximumꢀTemperatureꢀofꢀResistor
TAꢀ=ꢀAmbientꢀTemperatureꢀofꢀHeatsinkꢀ(ꢀ°Cꢀ)
Pꢀ=ꢀPowerꢀThroughꢀResistorꢀ(ꢀWꢀ)
25
50
85 100 115 130 145 155
Temperatureꢀofꢀtheꢀbackplate(°C)
Dimensions
USSꢀ2-T220ꢀ/ꢀUNSꢀ2-T220
tol.
tol.
Dimension
mm
12.70
10.16
0.76
(±mm)
0.2
0.2
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.1
0.1
inches
0.50
0.40
0.03
0.20
0.16
0.05
0.57
0.59
0.68
0.02
0.07
(±inches)
Dimension
mm
12.10
11.16
18.33
5.08
inches
0.476
0.439
0.722
0.200
0.069
0.126
A
B
C
D
E
F
G
H
I
0.008
0.008
0.004
0.004
0.004
0.004
0.008
0.008
0.008
0.004
0.004
A
B
C
D
E
F
5.08
4.00
1.76
1.20
3.20
14.60
15.00
17.33
0.40
J
K
1.85
Riedon Inc.ꢀ
300ꢀCypressꢀAvenueꢀ
AlhambraꢀCAꢀ91801ꢀ
ꢀ(626)ꢀ284-9901ꢀ
ꢀ(626)ꢀ284-1704
ꢀ
ꢀ
ꢀ
ꢀ
www.riedon.com
Pageꢀ125
rev.ꢀ03/2006A
ꢀ
ꢀ
ꢀ
ꢀ
USRꢀUNR 2-T220ꢀ/ꢀT220Bꢀ/ꢀT221
USSꢀUNS 2-T220
PrecisionꢀFoilꢀResistors
SPECIFICATIONS (continued)
Dimensions
tol.
tol.
Dimension
mm
17.30
10.16
6.00
Ø3.7
16.40
5.08
0.76
1.30
10.00
13.80
2.00
1.20
4.00
2.90
0.40
1.85
(±mm)
inches
0.68
0.40
0.24
Ø0.146
0.65
0.20
0.03
0.05
0.39
0.54
0.08
0.05
0.16
0.11
(±inches)
A
B
C
D
E
F
G
H
I
0.2
0.2
0.1
0.1
0.2
0.1
0.1
0.1
0.2
0.2
0.1
0.1
0.1
0.1
0.1
0.1
0.008
0.008
0.004
0.004
0.008
0.004
0.004
0.004
0.008
0.008
0.004
0.004
0.004
0.004
0.004
0.004
USRꢀ2-T220Bꢀ/ꢀUNRꢀ2-T220B
Iꢀ(C-Contact)
J
K
L
M
N
O
0.02
0.07
tol.
(±mm)
tol.
(±inches)
USRꢀ2-T221ꢀ/ꢀUNRꢀ2-T221
Dimension
mm
18.30
10.16
3.70
Ø3.2
16.40
5.08
0.76
1.30
10.00
13.80
2.00
1.20
4.00
3.90
0.40
1.85
inches
0.72
0.40
0.15
Ø0.126
0.65
0.20
0.03
0.05
0.39
0.54
0.08
0.05
0.16
0.15
0.02
0.07
A
0.2
0.2
0.1
0.1
0.2
0.1
0.1
0.1
0.2
0.2
0.1
0.1
0.1
0.1
0.1
0.1
0.008
0.008
0.004
0.004
0.008
0.004
0.004
0.004
0.008
0.008
0.004
0.004
0.004
0.004
0.004
0.004
B
C
D
E
F
G
H
I
Iꢀ(C-Contact)
J
K
L
M
N
O
USRꢀ2-T220ꢀ/ꢀUNRꢀ2-T220
tol.
(±mm)
tol.
(±inches)
Dimension
mm
15.30
10.00
2.80
Ø3.7
2.00
5.08
1.27
4.60
6.00
35.30
Ø0.6
2.41
inches
0.60
A
B
C
D
E
F
G
H
I
0.2
0.2
0.1
0.1
0.1
0.1
0.1
0.1
0.2
2.0
0.1
0.1
0.008
0.008
0.004
0.004
0.004
0.004
0.004
0.004
0.008
0.079
0.004
0.004
0.39
0.11
Ø0.146
0.08
0.20
0.05
0.18
0.24
J
1.39
K
L
Ø0.02
0.09
Riedon Inc.ꢀ
ꢀ
ꢀ
300ꢀCypressꢀAvenueꢀ
ꢀ
ꢀ
AlhambraꢀCAꢀ91801ꢀ
www.riedon.com
ꢀ(626)ꢀ284-9901ꢀ
ꢀ(626)ꢀ284-1704
Pageꢀ126
ꢀ
ꢀ
ꢀ
ꢀ
rev.ꢀ03/2006A
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