RA12
Series
TOCOS
POTENTIOMETERS
®
12mm Round, Single-Turn, Through-Hole Sealed Wirewound Trimmers
Features
12mm round, single-turn, through-hole, sealed wirewound trimmers
Top and side adjust styles available
Low equivalent noise resistance
High setting stability
Low temperature coefficient
Long rotational life
Meets UL 94V-0 flammability requirements
Sealed to withstand wave soldering and immersion cleaning processes
Specifications
Electrical
Standard Resistance Range
. . . . . . . . . . . . . 10Ω to 20kΩ
(standard 1, 2 & 5 sequence )
Resistance Tolerance
. . . . . . . . . . . . . . . . .
10% standard
End Resistance
. . . . . . . . 0.2% or 1Ω, whichever is greater
Resistance Taper
. . . . . . . . . . . . . . . . . . . . . . . . . . . . Linear
Peak Noise (C.R.V.)
. . . . . 0.5% or 2Ω, whichever is greater
Power Rating
. . . . . . . . 0.5 watt at
70 C, 0 watt at
125 C
Temperature Coefficient
. . . . . . . . . . . . . . . . .
50ppm / C
Environmental
Temperature Range
. . . . . . . . . . . . . . . . .
55 C to
125 C
Low Temperature Exposure
. . . . . . . . . . . . 55 C, 1 hours
∆T/R
)
1% 0.05Ω
High Temperature Exposure
. . . . . . . . . 125 C, 250 hours
∆T/R
)
1% 0.05Ω
Load Life
. . . . . . . . . . . . . . . . .
70 C, 0.5 watt, 1,000 hours
∆T/R
)
2%
Insulation Resistance
. . . . . 1,000MΩ minimum at 500VDC
Dielectric Strength
. . . . . . . . . . . . . . . . . 900VAC, 1 minute
Adjustment Travel
. . . . . . . . . . . . . . . . . . . . . . . . . 270
10
Thermal Shock
. . . . . . . . . . . . . . . . . . . . . . 55 C, 125 C,
30 minutes each, 5 cycles
∆T/R
)
1% 0.05Ω
Humidity
. . . . . . . . . . . . . . . . . . . . . . . .
40 C, 90-95%RH,
0.5 watt, 500 hours
∆T/R
)
2%
Mechanical
Mechanical Travel
. . . . . . . . . . . . . . . . . . . . . . . . . 300
Stop Strength
. . . . . . . . . . . . . . 1
kgf
•
cm
(13.86
oz
•
in)
10
min.
Shaft Torque
. . . . . . . . 30 to 300 gf
•
cm (0.42 to 4.16 oz
•
in)
Flammability of Plastic Materials
. . . . . . . Meets UL 94V-0
Nominal Weight
. . . . . . . . . . . . . . . . . . . 1.5g (P); 2.4g (S, X )
Marking
. . . . . . . . . . . . . . . . . . Resistance code, date code,
model type, terminal identification
Soldering Heat Resistance
. . . . . . . . . . . 350 C, 5 seconds
∆T/R
)
1% 0.05Ω
Seal Test
. . . . . . . . . . . . . . . . . 85 C, hot water for 1 minute
Rotational Life
. . . . . . . . . . 200 cycles without discontinuity
∆T/R
)
2%
∆T/R
= Total Resistance Change; S.S. = Setting Stability ( voltage ratio )
TOCOS
AMERICA, INC.
1177 East Tower Road, Schaumburg, IL 60173
Tel: 847-884-6664
Fax: 847-884-6665
E-mail: sales@tocos.com
www.tocos.com
101
RA12 Series
RA12
P
B
102
K
Part Numbering System
Resistance Tolerance: K = 10%
Resistance Code: Expressed in ohms. A three digit code where the first two digits
are significant figures, and the third digit indicates the number of zeros that follow
these figures (i.e., 100 = 10Ω; 101 = 100Ω; 102 = 1,000Ω; 105 = 1,000,000Ω ).
Resistance Taper: B = Linear.
Terminal Style: P = 3-Lead Configuration, Top Adjust.
S, X = 3-Lead Configurations, Side Adjust.
TOCOS Series Name.
Part Numbers
Nominal Resistance
Value (
Ω
)
Code
Catalog No.
Bulk
Resolution
Ohms (
Ω
)
Percent ( % )
Potentiometer
Styles
RA12P
Through-Hole, P Terminal Style, Single-Slot, Top Adjust
10
20
50
100
200
500
1,000
2,000
5,000
10,000
20,000
100
200
500
101
201
501
102
202
502
103
203
RA12P
RA12P
RA12P
RA12P
RA12P
RA12P
RA12P
RA12P
RA12P
RA12P
RA12P
B
B
B
B
B
B
B
B
B
B
B
100
200
500
101
201
501
102
202
502
103
203
K
K
K
K
K
K
K
K
K
K
K
0.11
0.18
0.34
0.51
0.81
2.20
3.90
6.04
10.4
18.9
27.6
1.13
0.90
0.69
0.51
0.41
0.44
0.39
0.30
0.20
0.19
0.14
RA12P
RA12S
Through-Hole, S Terminal Style, Single-Slot, Side Adjust
10
20
50
100
200
500
1,000
2,000
5,000
10,000
20,000
100
200
500
101
201
501
102
202
502
103
203
RA12S
RA12S
RA12S
RA12S
RA12S
RA12S
RA12S
RA12S
RA12S
RA12S
RA12S
B
B
B
B
B
B
B
B
B
B
B
100
200
500
101
201
501
102
202
502
103
203
K
K
K
K
K
K
K
K
K
K
K
0.11
0.18
0.34
0.51
0.81
2.20
3.90
6.04
10.4
18.9
27.6
1.13
0.90
0.69
0.51
0.41
0.44
0.39
0.30
0.20
0.19
0.14
RA12S
RA12X
Through-Hole, X Terminal Style, Single-Slot, Side Adjust
10
20
50
100
200
500
1,000
2,000
5,000
10,000
20,000
100
200
500
101
201
501
102
202
502
103
203
RA12X
RA12X
RA12X
RA12X
RA12X
RA12X
RA12X
RA12X
RA12X
RA12X
RA12X
B
B
B
B
B
B
B
B
B
B
B
100
200
500
101
201
501
102
202
502
103
203
K
K
K
K
K
K
K
K
K
K
K
0.11
0.18
0.34
0.51
0.81
2.20
3.90
6.04
10.4
18.9
27.6
1.13
0.90
0.69
0.51
0.41
0.44
0.39
0.30
0.20
0.19
0.14
RA12X
Packaging
Standard:
Bulk Packaging
Quantity
10 pieces per vinyl bag; 100 pieces per box.
Soldering and Cleaning Guidelines
For soldering, cleaning and other information, refer to Guidelines and Precautions for Using Potentiometers.
TOCOS
AMERICA, INC.
1177 East Tower Road, Schaumburg, IL 60173
Tel: 847-884-6664
Fax: 847-884-6665
E-mail: sales@tocos.com
www.tocos.com
103
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