14S, 17S, 18S
Vishay Techno
www.vishay.com
Multi-Turn 1/4" (6.35 mm) Square Wirewound Trimmers
FEATURES
• Precious metal wiper
• 0.25 W to +85 °C
• TCR < 50 ppm/°C
• Solderable leads
APPLICATIONS
• Special configurations available
• Military quality at affordable prices
Wirewound trimmers are particularly useful in those
applications where any combination of high power, low
temperature coefficient of resistance and/or excellent long
term life stability are important design considerations.
ENVIRONMENTAL SPECIFICATIONS
Temperature limits: -65 °C to +175 °C
Sealing: fully sealed case (non-hermetic)
ELECTRICAL SPECIFICATIONS
Electrical travel
22 turns 4 turns
STANDARD RESISTANCE VALUES
10 Ω to 5 kΩ (extended range
available in non MIL-SPEC product)
RESISTANCE (1)
NOMINAL RESOLUTION
Resistance range
(Ω)
(%)
1.65
1.35
1.13
0.82
0.62
0.62
0.49
0.34
0.27
0.21
0.17
0.16
Resistance tolerance
5 ꢀ standard
50 ppm/°C
10
20
Temperature
coefficient
(-65 °C to +150 °C)
50
0.5 W at +85 °C derated to 0 W at
+150 °C, these specifications exceed
MIL-SPEC
100
200
500
1K
Power rating
End resistance
1 Ω or 2 ꢀ, whichever is greater
Equivalent noise
resistance (ENR)
100 Ω maximum
2K
5K
1000 VAC at atmospheric pressure,
these specifications exceed
MIL-SPEC
Dielectric (DWV)
10K
20K
25K
> 100 000 MΩ (500 VDC), these
specifications exceed MIL-SPEC
Insulation resistance
Note
MECHANICAL SPECIFICATIONS
(1)
Other resistances available upon request
Operating torque: 3 oz.-inches maximum, 17S and 18S,
5 oz.-inches maximum, 14S
Rotation: clutch stop, wiper idles
Weight: 0.935 g maximum
CIRCUIT DIAGRAM
Resistive element: nickel chromium
Rotational life: 200 cycles minimum
Terminal strength: 2 lbs for 10 s
1
3
CW
2
GLOBAL PART NUMBER INFORMATION
New Global Part Numbering: 14S500RB (preferred part number format)
1
4
S
5
0
0
R
B
GLOBAL MODEL
TYPE
RESISTANCE VALUE
PACKAGING
14 = side adjustment screw
17 = top adjustment screw
18 = side adjustment screw
/ = continuous rotation
S = clutch stop
R = decimal
K = thousand
100R = 100 Ω
5K00 = 5 kΩ
B = bulk
Historical Part Numbering: 14s501 (will continue to be accepted)
14
s
501
RESISTANCE VALUE
HISTORICAL MODEL
TYPE
Revision: 26-Jul-2021
Document Number: 68017
1
For technical questions, contact: sfer@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000