Panasonic ABV BV Product Catalog page 15

Technical Terminology & Cautions for Use (Detection Switches)
CAUTIONS IN A CIRCUIT
1) Contact protection is recommended when snap-action switches are
used in an inductive load circuit.
Circuit diagram
Contact for snap­action switch
r c
R
Contact for snap­action switch
r
R
c
Contact for snap­action switch
diode
R
Contact for snap­action switch
ZNR
Varistor
Panasonic Industry Co., Ltd. Electromechanical Control Business Division
industrial.panasonic.com/ac/e/
Cautions for use
(1) r = more than 10 Ω
(2) In an AC circuit
Impedance of R is to be slightly
smaller than impedance of r and c.
Can be used for both AC and DC.
Impedance of r is nearly equal to
impedance of R.
C: 0.1 μF
(1) For DC circuits only.
Can be used for both AC and DC.
2) Do not connect the contacts on individual switches to different type
or different poles of the power supply.
Examples of power supply connections (connection to different
poles)
Wrong
Solenoid load
Right
Solenoid load
Load connected to same pole
Example of wrong power supply connection (connection to different
poles of power supply)
This may lead to mixed DC and AC.
Wrong
AC
DC
3) Avoid circuits which apply voltage between contacts. (This may lead
to mixed deposition.)
Wrong
L
100 V
ー 14 ー
Panasonic Industry Co., Ltd. 2022
Lamp load
PL
Lamp load
PL
Load
L
Load
L
200 V
AECTB36E 202204