78PBWR5KLF [TTELEC]
1-1/4 Rectangular Multiturn Cermet Trimming Potentiometer; 1-1 / 4矩形多圈金属陶瓷微调电位器型号: | 78PBWR5KLF |
厂家: | TT Electronics |
描述: | 1-1/4 Rectangular Multiturn Cermet Trimming Potentiometer |
文件: | 总4页 (文件大小:63K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
MODEL 78
1-1/4” Rectangular
Multiturn
1
Cermet Trimming
Potentiometer
ELECTRICAL
Standard Resistance Range, Ohms
Standard Resistance Tolerance
Input Voltage, Maximum
Slider Current, Maximum
Power Rating, Watts
End Resistance, Maximum
Actual Electrical Travel, Turns, Nominal
Dielectric Strength
10 to 2Meg
10ꢀ ꢁ(100 Ohms ꢂ 20ꢀꢃ
300 Vdc or rms not to exceed power rating
100mA or within rated power, whichever is less
1.0 at 70°C derating to 0 at 125°C
2 Ohms
22
500 Vrms
Insulation Resistance, Minimum
Resolution
1,000 Megohms
Essentially infinite
Contact Resistance Variation, Maximum
1ꢀ or 1 Ohm, whichever is greater
ENVIRONMENTAL
Seal
85°C Fluorinert® ꢁNo Leaksꢃ
100ppmꢄ°C
Temperature Coefficient, Maximum
Operating Temperature Range
Thermal Shock
Moisture Resistance
Shock, 6ms Sawtooth
Vibration
–55°C to +125°C
5 cycles, –55°C to +125°C ꢁ1ꢀ ∆RT, 1ꢀ ∆VRꢃ
Ten 24 hour cycles ꢁ1ꢀ ∆RT, IR 1,000 Megohms Min.ꢃ
100G’s ꢁ1ꢀ ∆RT, 1ꢀ ∆VRꢃ
20G’s, 10 to 2,000 Hz ꢁ1ꢀ ∆RT, 1ꢀ ∆VRꢃ
250 hours at 125°C ꢁ2ꢀ ∆RT, 2ꢀ ∆VRꢃ
200 cycles ꢁ3ꢀ ∆RTꢃ
High Temperature Exposure
Rotational Life
Load Life at 0.5 Watts
Resistance to Solder Heat
1,000 hours at 70°C ꢁ2ꢀ ∆RTꢃ
260°C for 10 sec. ꢁ1ꢀ ∆RTꢃ
MECHANICAL
Mechanical Stops
Torque, Starting Maximum
Weight, Nominal
Clutch Action, both ends
5oz.-in. ꢁ0.035 N-mꢃ
.09 oz. ꢁ2.6 gramsꢃ
Fluorinert® is a registered trademark of 3M Company.
Specifications subject to change without notice.
Model 78
1-61
SIDE ADJUSTMENT (Inch/mm)
Model 78P
Circuit Diagram
Marked On This Surface
Housing
Molded Plastic
Metal
Adjustment Screw
.110ꢄ2.794 ± 0.127 Dia. With .025ꢄ0.635
± 0.127 Wide X .031ꢄ0.787 ± 0.127 Deep Slot
Model No. &
Resistance
0.07
1.78
Value Marked
On This Surface
1.25
31.75
1.000 ± .005
25.400 ± 0.127
.125 ± .005
3.175 ± 0.127
.105
.195 ± .005
4.953 ± 0.127
2.667
.32
8.13
.015 ± .003
0.127 ± 0.076
3 Terminals Pins
Solderable
.135
.50 ± .03
12.70 ± 0.76
.028 ± .003
0.711 ± 0.076
ꢁ1ꢃ
ꢁ2ꢃ ꢁ3ꢃ
3.429
Dia.
2 Mounting Holes
.093 ± .005
2.362 ± 0.127
I.D.
.05
1.27
.10
.30
7.62
.70
17.78
.260 ± .015
6.604 ± 0.381
2.54
Note: Model 78P dimensions applicable to all other models except as noted.
Model 78L
.062ꢄ1.575 Max.
Meniscus
3 Electrical Leads – 6ꢄ152 Min. Length
No. 30 AWG Teflon Insulated Stranded Wire
Yellow ꢁ1ꢃ
Red ꢁ2ꢃ
Green ꢁ3ꢃ
.187 ± .031
4.750 ± 0.787
Model 78S
3 Terminals Pins
Solderable
.028 ± .003
0.711 ± 0.075
.05 ± .02
1.27 ± 0.51
.10 ± .02
2.54 ± 0.51
ꢁ1ꢃ
ꢁ3ꢃ
ꢁ2ꢃ
Dia.
.156 ± .031
.30 ± .02
7.62 ± 0.51
Dia.
3.962 ± 0.787
ꢁ3 Placesꢃ
.26 ± .02
6.60 ± 0.51
.70 ± .02
17.78 ± 0.51
Model 78
1-62
PANEL MOUNT ADAPTER (Inch/mm)
1
Model 56BW (Adapter Only)
Metal Bushing Mount
Brass-Nickel Plated
Mounting Surface
.125 ± .005
Dia. Hole
3.175 ± 0.127
Use .22ꢄ5.613 Dia. Min. Mounting Hole
Lock Washer, Panel Nut, Sealing Washer
& Mounting Screws Provided
1.56
3.962
Max.
Max.
.312 ± .015
7.925 ± 0.381
.437
11.100
Model 78LBW (Adapter Pre-Assembled with Trimmer)
1.344
34.138
.250 ± .015
6.350 ± 0.381
0.94
2.388
Max.
Max.
12-28 UNF-2A Thread
Model 78SBW (Adapter Pre-Assembled with Trimmer)
1.344
34.138
.250 ± .015
6.350 ± 0.381
0.94
Max.
2.388
Max.
12-28 UNF-2A Thread
.344 ± .031
ꢁ1ꢃ
ꢁ3ꢃ
ꢁ2ꢃ
8.738 ± 0.787
Model 78
1-63
STANDARD RESISTANCE VALUES, OHMS
10
20
50
200
500
1K
5K
10K
20K
25K
50K
100K
200K
250K
500K
1Meg
2Meg
100
2K
PACKAGING
Standard:
Boxes
Capacity
ꢂ
25 Units
ORDERING INFORMATION
78 P BW R 10K LF
RoHS Compliant Code - optional
Resistance Value
Resistance Prefix
Model Series
Pin Style
Optional Panel
Mount Adapter
Note: Use ‘56BW’ to order panel mount adapter without trimmer
CIRCUIT DIAGRAM
NOTES
Metric equivalents, based on 1 inch ꢂ 25.4mm are
rounded to the same number of significant figures
as in the original English units and are provided for
general information only.
(2)
INCH
mm
(1)
(3)
Tolerances unless otherwise specified:
Linear ꢂ .01 inches ꢁ.25mmꢃ
Angular ꢂ 2 degrees
CW
Model 78
1-64
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