UP Series — Ultra Precision Metal Film Resistors
Features
• Highest stability metal film available
• Higher power options available
• Tolerances to ±0.01% available
• 1W available, contact factory
• Cut and formed product is available on
select sizes; contact factory for details
• TCRs as low as 5 ppm
• Matched sets available
• Low noise
• Non-standard resistance values available
Electrical Specifications
Type / Code
UP 1/4
UP 1/2
Power Rating
(Watts) @ 70°C
0.25W
0.5W
Maximum Working Voltage*
350
350
Maximum Pulse Voltage
500
500
* Lesser of
√PR
or maximum working voltage.
Tolerance / TCR Combinations
Electrical (Operating Temperature Range -20°C to +85°C)
TCR
Code
TA
TB
TD
T9
T2
TCR
0.01–0.02%
5
10
15
25
50
51.1Ω – 500K
51.1Ω – 500K
51.1Ω – 500K
51.1Ω – 294K
51.1Ω – 294K
0.05%
10Ω – 1M
10Ω – 1M
10Ω – 1M
10Ω – 1M
10Ω – 1M
UP 1/4
0.1–0.25%
10Ω – 499K
10Ω – 4M
10Ω – 4M
5.11Ω – 2M
5.11Ω – 2M
0.5–1%
1Ω – 4M
1Ω – 4M
1Ω – 4M
1Ω – 2M
1Ω – 3.92M
0.01–0.02%
51.1Ω – 499K
51.1Ω – 499K
51.1Ω – 499K
51.1Ω – 499K
51.1Ω – 499K
UP 1/2
0.05%
10Ω – 499K
10Ω – 499K
10Ω – 499K
10Ω – 499K
10Ω – 499K
0.1–0.25%
10Ω – 499K
10Ω – 1M
5.11Ω – 1M
5.11Ω – 2M
5.11Ω – 2M
0.5–1%
10Ω – 499K
1Ω – 1M
1Ω – 1M
1Ω – 2M
1Ω – 3.92M
How to Order
UP
SEI Type
1/4
Code
T1
TCR Code
4.75K
Nominal Resistance
1%
Tolerance
R
Packaging
Code
1/4
1/2
Code
T2 = 50ppm
T9 = 25ppm
TD = 15ppm
TB = 10ppm
TA = 5ppm
Tolerance
0.01%
0.02%
0.05%
0.1%
0.25%
0.5%
1%
Values
E192
E192
E192
E192
E192
E192
E192
Code
R
A
Description
Paper
Bulk
Pkg Qty
5,000
1,000
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
35
email: marketing@seielect.com
UP Series — Ultra Precision Metal Film Resistors
Mechanical Specifications
Type / Code
UP 1/4
UP 1/2
A
Body Length
0.28 max
7.2 max
0.39 max
10.0 max
B
Body Width
0.10 max
2.5 max
0.145 max
3.70 max
C
Lead Length
1.18
30.0
1.18
30.0
min
min
min
min
D
Lead Diameter
0.024
0.61
0.024
0.61
±
±
±
±
0.002
0.05
0.002
0.05
Units
inches
mm
inches
mm
Performance Characteristics
Environmental
Load at commercial rating: 1,000 hours at 70°C
Load at CECC rating: 1,000 hours at 70°C
Dry Heat: 1,000 hours at 155°C
Shelf Life: 12 months at room temperature
Short term overload
Climatic
Climatic category
Long term damp heat
Temperature rapid change
Resistance to solder heat
Vibration and bump
Noise (in a decade of frequency)
∆R%
∆R%
∆R%
∆R%
µV/V
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
Maximum
0.30
0.30
1.00
0.10
0.10
0.30
55/155/56
0.50
0.20
0.06
0.06
1.00
Typical
0.10
0.05
0.15
0.03
0.02
0.10
0.10
0.05
0.03
0.02
0.10
Toll Free: (888) SEI-SEIS
(888) 734-7347
www.seielect.com
36
email: marketing@seielect.com
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