EUCHNER – More than safety.
EUCHNER – More than safety.

NB01K556-M (Order no. 085247)

Precision single limit switch NB01, ball plunger

  • Plunger material stainless steel
  • Cable entry M12 x 1.5
NB01K556-M (Order no. 085247)


Dimension drawing
Dimension drawing
Wiring diagram ES620
Wiring diagram ES620
Electromechanical safety switches in use

Dimensional drawings

Dimensional drawings
1Operating point
2Free position

Connection examples

Connection examples

Technical data


EAC_RU C-DE.MO05.B.00971/20DNV-GL_TAA0000172 Rev. 1c_UL_us_E155795_2/4

Electrical connection values

Connection cross section 0.14 ... 1 mm² (Screw terminal)
Rated insulation voltage Ui 250 V
Rated impulse withstand voltage Uimp 2.5 kV
Utilization category
DC-13 2 A 24 V
AC-15 2 A 230 V
Short circuit protection according to IEC 60269-1 6A gG
Switching current
min. at DC 24V 10 mA
thermal rated current Ith 6 A

Mechanical values and environment

Approach speed 0.01 ... 8 m/min
Connection type
1 x M12 x 1.5
Number of door position NC contacts 1 (Changeover contact)
Number of door position NO contacts 1 (Changeover contact)
Tightening torque
Switching element screw terminal max. 0.2 Nm Hexagon socket AF 1.3 mm
Actuating element
Steel ball D ball = 4 mm Ball plunger
Actuating force 15 ... 20 N
Installation orientation any
Mechanical life 10 x 10⁶
Switching principle Changeover contact with snap-action function
Degree of protection IP67
Ambient temperature -5 ... +80 °C
Housing Anodized die-cast alloy
Contact Silver alloy, gold flashed


Complete package

Download all important documents with a single click.


  • The operating instructions and any additions to the operating instructions or brief instructions
  • Any data sheets to supplement the operating instructions
  • The declaration of conformity
Download Complete Package (ZIP, 2,4 MB)

Single Documents

Other Documents

Ordering data

Ordernumber 085247
Item designation NB01K556-M
Gross weight 0,09kg
European Article Number (EAN) 4047048002081
Customs tariff number 85365019000
ECLASS 27-27-06-01 Position switch (Type 1)

Technical support

Technical support
Do you have technical questions about our products, their possible use or applications? Our experts will be happy to help.

+1 315 701-0315