Type TF Low TC Ultra-Precision Film Resistors
Absolute TC to 5 ppm/°C, Values from 1 Kohm to 125 Megohms, Absolute Tolerance to ±0.01%
®
Type TF precision resistors employ the Caddock Tetrinox resistance
films - the resistance system that sets a new standard for high value,
ultra-stable precision resistors that provide an exceptional combination of
performance characteristics:
• Ultra-Precision - Five standard resistance tolerances from ±1% to ±0.01%.
• A Wide Range of Resistance Values - from 1 Kohm to 125 Megohms.
• Low Temperature Coefficient - 5 ppm/°C, 10 ppm/°C, or 15 ppm/°C.
• Long-Term Stability - to 0.01% per 1,000 hours.
This approach to quantity production of ultra-precision discrete resistors is
the result of combining our unique complex oxide resistance film technology
with an advanced high thru-put laser manufacturing capability.
Type TF - Standard Resistance Range - 1 Kohm to 10 Megohms
Specifications:
Apply to all Type TF resistor models.
Maximum
Continuous
Oper. Voltage
Model Number
Resistance
Dimensions inches (mm)
Wattage
@ +70°C
Axial Leads Radial Leads
Min.
Max.
A
B
Absolute Temperature Coefficient: 5 ppm/°C,
10 ppm/°C, or 15 ppm/°C referenced to +25°C, ΔR
taken at -15°C and +105°C.
.750 ±.020
.375 ±.020
(9.53 ±.51)
.500 ±.020
TF020
TF050
N
N
TF020
TF050
R
R
0.33
0.75
300
1 K
2 Meg
(19.05 ±.51)
1.500 ±.020
1,400
10 K
10 Meg
(38.10 ±.51) (12.70 ±.51)
Resistance Tolerance: ±0.01%, ±0.025%,
100
±0.05%, ±0.10%, or ±1.0%.
80
60
40
20
0
Load Life: For ±0.10% or tigher tolerance,
1,000 hours at +70°C. Load stability versus
applied power is shown in the load stability curve
on this page.
Shelf Life: Typically 0.0025% per year
Load Stability:
0.01%
0.02%
0.03%
MAXIMUM %∆R per 1,000 HOURS
Storage Temperature: -55°C to +105°C.
Leadwire: Tinned Copper.
Type TF - Extended Resistance Range - 2 Megohms to 125 Megohms
Derating Curve:
Maximum
Continuous
Oper. Voltage
Model Number
Resistance
Dimensions inches (mm)
Wattage
@
+70°C
100
80
Axial Leads Radial Leads
Min.
Max.
A
B
.750 ±.020
.375 ±.020
(9.53 ±.51)
TF626
TF656
N
N
TF626
TF656
R
R
0.33
0.75
300
2.01 Meg
35 Meg
60
RATED LOAD, %
40
(19.05 ±.51)
1.500 ±.020
.500 ±.020
1,400
10.01 Meg
125 Meg
20
0
(38.10 ±.51) (12.70 ±.51)
0
35
70
105
Shelf Life: Typically 0.005% per year
Load Stability: 1,000 hours at rated
voltage at +70°C, maximum ΔR 0.03%
AMBIENT TEMPERATURE, °C
Ordering Information:
.075 ±.020
A
(1.91 ±.51)
.075 ±.020
(1.91 ±.51)
1.500 ±.125
A
CADDOCK
TF020R
0418
(38.10 ±3.18)
B
TF050R - 10.0 Meg - 0.01% - 10 ppm/°C
CADDOCK
TF020N
0428
.032
(.81)
.50 ±.125
Model Number
Tolerance
(12.70 ±3.18)
.032 (.81)
B
Resistor Value
Temperature
Coefficient
Radial Lead Spacing:
.600 ±.020 (15.24 ±.51) for Models TF020R and TF626R
1.350 ±.020 (34.29 ±.51) for Models TF050R and TF656R
DIMENSIONS IN INCHES AND (MILLIMETERS)
Custom Type TF Resistors
And for special requirements, custom
Type TF resistors are available with:
Additional cost savings can be
realized when your high volume
ultra-precision Type TF
• TC of 5 ppm/°C, 10 ppm/°C, 15 ppm/°C,
20 ppm/°C, or 25 ppm/°C.
resistor is optimized for:
• Lightning transient capability
• Voltage rating
• Power rating
• Mechanical configuration
• Ratio matched sets
• Shelf stability of 0.0025% per year.
Type TF resistors can also be produced
with custom-spaced radial leads that will
plug directly into your existing circuit
layout.
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
e-mail: caddock@caddock.com • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
Fax: (951) 369-1151
© 2004 Caddock Electronics, Inc.
28_IL116.1004
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