High Precision Metal Film Leaded Resistor
(UPF Series)
1773299-1 www.te.com REV A 1
■Features
－Very tight tolerance down to ±0.02%
－Extremely low TCR down to ±5PPM/℃
－High precision
－Excellent stability
■Applications
－Precision Equipment
－Measurement Equipment
■Construction
■Dimensions Unit : mm
■Derating Curve
Type L D H d
Weight
(g)
(1000pcs)
UPF25 7.0±0.3 2.7±0.4 26±3 0.6±0.05 230
UPF50 10.2±0.3 4.0±0.4 25±3 0.6±0.05 430
0
20
40
60
80
100
0 20 40 60 80 100 120 140 160
Ambient Temperature ( ℃ )
Power ratio (%)
High Precision Metal Film Leaded Resistor
(UPF Series)
1773299-1 www.te.com REV A 2
■Part Numbering
UPF 50 B 1K0 V
Product Type Power Rating Tolerance Resistance TCR
UPF 25 : ¼ W
50 : ½ W B : ±0.1%
1R0 : 1Ω
100R : 100Ω
1K0 : 1,000Ω
100K : 100,000Ω
V : ±5PPM
■Standard Electrical Specifications
Power Rating Resistance Range
Item
Type 70°C
Operating Temp.
Range
Max.
Operatin g
Voltage
Max.
Overload
Voltage ±0.02% ±0.05% ±0.1%
TCR
(PPM/°C)
25 1/4W 250V 500V 10Ω -500KΩ ±5
50 1/2W
-55 ~ +125°C
300V 600V 10Ω -500KΩ ±5
Operating Voltage V=√(P*R)
■Environmental Characteristics
Item Requirement Test Method
Temperature Coefficient
of Resistance (T.C.R.)
As Spec.
Resistance value at room temperature and room
temperature+60°C
Short Time Overload ±(0.05%+0.05Ω) JIS-C-5201-1 5.5
RCWV*2.5 or Max. overload voltage for 5 seconds
Insulation Resistance > 1,000MΩ MIL-STD-202F Method 302
Apply 500VDC for 1 minute
Endurance ±(0.2%+0.05Ω)
MIL-STD-202F Method 108A
70±2℃, Max. working voltage for 1000 hrs with 1.5 hrs “ON”
and 0.5 hrs “OFF”
Damp Heat with Load ±(0.2%+0.05Ω)
MIL-STD-202F Method 103B
402C, 90~95% R.H. Max. working voltage for 1000 hrs with
1.5 hrs “ON” and 0.5 hrs “OFF”
Solderability 95% min. Coverage MIL-STD-202F Method 208H
245±5℃ for 5 seconds
Resistance to
Soldering Heat ±(0.05%+0.01Ω) 350±10°C for 3 seconds or 260±5°C for 10 seconds
Terminal Strength Tensile: ≧
2.5kg Tensile strength: for 10 sec.
Torsional strength: Rotated through 360˚,5 rotations.
Pulse Overload ±(0.1%+0.01Ω)
JIS-C-5201-1 5.8
4 times RCWV for 10000 cycles with 1second “ON” and 25
seconds “OFF”
Temperature Cycle ±(0.05%+0.05Ω) -25℃(30min)/+85℃(30min), 5 cycles
Resistance to Solvent No deterioration of coatings and markings JIS-C-5201-1 6.9
Trichroethane for 3 min. with ultrasonic
Storage Temperature: 25±3°C; Humidity < 80%RH
