Model 64
Vishay Spectrol
3/8” Square (10mm)
Multiturn Cermet Trimmer
FEATURES
• Unique Ratchet Device Integral with Gear to Ensure
Long Term Reliability
• Central Pivot Locating the Gear for Improved Stability
• I.C. Style Pins for Easy PCB Insertion
• Rigid Board Mounting Achieved with Pins Secured in
Housing
• Soldered Terminations for High Reliability
• Multifinger Precious Metal Wiper For Long Term Set
Point Stability
• Double Chevron Shaft for Sealing Plus Consistant
Torque and Reliable Adjustability
• Flame Retardent Plastic Housing
The Model 64 cermet trimmer from Vishay Spectrol incorporate improved design features making it one of the most ad-
vanced components of its type available in Europe. Giving maximum versatility with a choice of five pin styles and top or
side adjustment. Available from 10Ω to 2MΩ, the Model 64 has 25 turns nominal travel and a resistance tolerance of
±
10%. Significant design features include the use of two Chevron sealing rings on the shaft, for more consistent torque and
improved adjustability and flame retardant housing. A precious metal wiper significantly improves long term stability, making
it particularly suitable for telecommunication applications.
ELECTRICAL SPECIFICATIONS
PARAMETER
Effective Travel
Resistance Range
Resistance Tolerance
End Resistance
Temperature Coefficient of Resistance
25 turns nominal
10Ω thru - 2MΩ
±
10%
Less than 2Ω
100ppm/°C, 100Ω thru 2MΩ
0 to + 250ppm/°C. below 100Ω
0.5 watts @ 70°C, derated linearly to zero watts @ 125°C
Maximum voltage not to exceed 300V
1000VAC @ sea level, 250VAC @ 80,000 ft (24,400 meters)
1000MΩ minimum
1% or 1Ω, whichever is greater
Power Rating
Dielectric Withstanding Voltage
Insulation Resistance
Contact Resistance Variation
ORDERING INFORMATION
64
MODEL
P
TERMINAL
STYLE
P, W, X, Y or Z
XXX
EIA STANDARD
RESISTANCE CODE
Example:
64 - P - XXX
www.vishay.com
36
For technical questions, contact sfer@vishay.com
Document Number: 57028
Revision 16-Jul-03
Model 64
3/8” Square (10mm) Multiturn Cermet Trimmer
DIMENSIONS
in inches (millimeters)
Vishay Spectrol
64P
0.375 (9.52)
±
0.015
64W
64X
0.060 (1.52)
±
0.010
0.015 (0.38) TYP
SHAFT: 0.080 (2.03) Ø
SLOT: 0.02 (0.51) X 0.03 (0.76) DP.
0.065 (1.65)
±
0.010
0.190 (4.83)
±
0.010
64Y
0.188 (4.78) MIN. TYP
0.135 (3.43)
±
0.010
0.015 (0.38) TYP
0.020 (0.51)
±
0.003 TYP
64Z
0.065 (1.65) MAX TYP
0.012 (0.30)
±
0.002 TYP
0.100 (2.54)
±
0.010
0.100 (2.54)
±
0.010
0.100 (2.54)
±
0.010
0.100 (2.54)
±
0.010 TYP
0.040 (1.02)
±
0.010
0.040 (1.02)
±
0.010
2
W
CW
3
CCW
TOLERANCES:
±
0.015 (0.38) except where noted.
1
MECHANICAL SPECIFICATIONS
PARAMETER
Stop Strength
Operating Torque
Weight
Resistance Element
2 Terminal Adjustability
3 Terminal Adjustment
Contact idles at stop
35mNm nominal
0.04oz (1.13gm) maximum
Cermet
0.05% of RT
0.01% of applied voltage
Document Number: 57028
Revision 16-Jul-03
For technical questions, contact sfer@vishay.com
www.vishay.com
37
Model 64
Vishay Spectrol
3/8” Square (10mm) Multiturn Cermet Trimmer
ENVIRONMENTAL SPECIFICATIONS
PARAMETER
MAX
R
CHANGE
V
AB
V
AC
1%
–
2%
–*
–
–
PER CECC
41100
PER IEC
68.1 PART 1
PER MIL
202F
Temperature Range
Bumps
Vibration
Electrical Endurance
Soldering
Resistance to Heat
- 55°C to + 125°C
390m/s
2
, 4000
98m/s
2
, 10 to 500Hz
1000 hour
–
–
2%
1%
1%
3%*
–
1%
(PARA 2.3.6) TEST NA (IEC 68 - 2 - 14) METHOD 107
(PARA 2.3.3)
(PARA 2.3.2)
(PARA 2.5.16)
(PARA 2.3.7)
(PARA 2.3.7)
TEST EB (IEC 68 - 2 - 29)
NO EQUIV
TEST FC (IEC 68 - 2 - 6) METHOD 204
NO EQUIV
TEST TB (IEC 68 - 2 - 20) METHOD 208
TEST TB (IEC 68 - 2 - 20A) METHOD 210
METHOD 1A
TEST C (IEC 68 - 2 - 3)
METHOD 103
Damp Heat Steady State
Sealing
Mechanical Life
Terminal Strength
56 days
125°C for 1 min
200 cycles
2.2lbs (1kg)
3%
–
3%
min
–
–
–
–
(PARA 2.1)
AS IEC
TEST QC (IEC 68 - 2 - 17) METHOD 112
METHOD 2
*Better than 2% changes of wiper resistance with respect to element is achievable with the precious metal wiper
STANDARD RESISTANCE
RESISTANCE
MARKING
Unit
Identification
Manufacturer’s name and model number,
resistance value, tolerance, date code and
terminal identification
Ω
10
20
50
100
200
500
1000
2000
5000
10000
20000
25000
50000
100000
200000
250000
500000
1000000
2000000
RESISTANCE
CODE
100
200
500
101
201
501
102
202
502
103
203
253
503
104
204
254
504
105
205
www.vishay.com
38
For technical questions, contact sfer@vishay.com
Document Number: 57028
Revision 16-Jul-03
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