BC20-K40SR-VP4X2
Type code BC20-K40SR-VP4X2
Ident no. 25100
Rated switching distance (flush) 20 mm
Rated switching distance (non-flush) 30 mm
Assured sensing range e (0.72 x Sn) mm
Hysteresis 2…20 %
Temperaturdrift type e ± 20 %
Repeatability e 2 % of full scale
Ambient temperature -25…+70 °C
Operating voltage 10…65VDC
Residual ripple e 10 % Uss
DC rated operational current e 200 mA
No-load current I0 e 15 mA
Residual current e 0.1 mA
Switching frequency 0.1  kHz
Rated insulation voltage e 0.5 kV
Output function 4-wire, changover contact, PNP
Short-circuit protection yes/ cyclic
Voltage drop at Ie e  1.8 V
Wire breakage / Reverse polarity protection yes/ complete
Design smooth barrel, 40 mm
Dimensions 90 mm
Housing material plastic, ABS
Material active face Plastic, ABS
Connection terminal chamber
Clamping ability e 2.5 mm2
Vibration resistance 55 Hz (1 mm)
Shock resistance 30 g (11 ms)
Protection class IP67
MTTF 1080 years acc. to SN 29500 (Ed. 99) 40 °C
Power-on indication LED green
Switching state LED yellow
Included in scope of supply BS40, cable gland, blanking plug
n 2 cable entries (axial, radial)
n Smooth barrel, ? 40 mm
n Plastic, ABS
n Fine adjustment via potentiometer
n DC 4-wire, 10…65 VDC
n Changeover contact, PNP output
n Terminal chamber
Wiring diagram
Functional principle
Capacitive proximity switches are designed
for non-contact and wear-free detection of
electrically conductive as well as non-conduc-
tive metal objects.

Mounting instructions / Description minimum distances
Distance D 40 mm
Distance W 60 mm
Distance S 60 mm
Distance G 120 mm
Diameter of the active area B ?  40  mm
The given minimum distances have been checked in
compliance with the standard switching distance.
Should the sensitivity of the sensors be changed via
potentiometer, the data sheet specifications no longer
apply.