148, 149
Vishay Spectrol 1/2" (12.7 mm) Conductive Plastic and Cermet
Potentiometers
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 57040
104 Revision: 01-Apr-09
LOCATING PEGS (Anti-Rotation Lug)
The locating peg is provided by a plate mounted on the bushing
and positioned by the module sides. Four set positions are
available, clock face orientation: 12, 3, 6, 9. CODE VERSION BUSHING
A, B
BUSHING
F
EFFECTIVE
HIGH PEG
All 148, 149 bushings have a double flat. When panel mounting
holes have been punched accordingly, an anti-rotation lug is not
necessary.
AØ d mm 2 2 0.7
L mm 6.2 6.2 -
BØ d mm 2 2 0.7
L mm 7.75 7.75 -
CØ d mm - 3.5 1.1
L mm - 13.5 -
Locating pegs are supplied in separate bags with nuts and
washers
RSID OPTION: ROTARY SWITCH MODULES
• Rotary switches
• Current up to 2 A
• SPDT: Single pole, changeover switch in CCW position - 3 pins
MODULES: RS ON/OFF SWITCH
RSI CHANGEOVER SWITCH
The position of each module is free.
RS and RSI rotary switches are housed in a standard 148, 149
module size 12.7 mm x 12.7 mm x 5.08 mm (0.5" x 0.5" x 0.2").
They have the same terminal styles as the assembled electrical
modules.
An assembly can comprise 1 or more switch modules.
Switch actuation is described as seen from the shaft end.
D:means actuation in maximum CCW position
The switch actuation travel is 25° with a total mechanical travel of
300° ± 5° and electrical travel of electrical module is 238° ± 10°.
RSID SINGLE POLE CHANGEOVER
In full CCW position, the contact is made between 3 and 2 and
open between 3 and 1. Switch actuation (CW direction) reverses
these positions.
SWITCH SPECIFICATIONS
Switching Power Maximum 62.5 VA ν
15 VA =
Switching Current Maximum 0.25 A 250 V ν
0.5 A 30 V =
Maximum Current Through Element 2 A
Contact Resistance 30 mΩ
Dielectric
Strength
Terminal to Terminal 1000 VRMS
Terminal to Bushing 2000 VRMS
Maximum Voltage Operation 250 V ν
30 V =
Insulation Resistance Between Contacts 106 MΩ
Life at Pmax. 10 000 actuations
Minimal Travel 25°
Operating Temperature - 40 °C to + 85 °C
ELECTRICAL DIAGRAM
Note
• Common
12
L
3
6
9
Ø d
RSID
CCW POSITION
13*2