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

SGA2A-2121ARC18-EXT5 (Order no. 104012)

Safety switch SGA, plug connector RC18, 2 illuminated pushbuttons

  • 2 illuminated pushbuttons
  • Plug connector(s) M23 (RC18), 18-pole PE
  • 4 positively driven, positively driven contacts
  • Switching disk made of metal
SGA2A-2121ARC18-EXT5 (Order no. 104012)


Approach direction

Horizontal and vertical

Can be adjusted in 90° steps

Switching element


Slow-action switching contact 4 positively driven, positively driven contact

Required accessories

Actuator is not included in the scope of delivery.

Extended version

The Extended version includes additional control and display elements.

Dimension drawing
Dimension drawing
Wiring diagram 2121 EXT5
Wiring diagram 2121 EXT5
Electromechanical safety switches in use

Dimensional drawings

Dimensional drawings
1Pushbutton S1, yellow illuminated
2Pushbutton S2, white illuminated
3Actuating direction can be changed

Connection examples

Connection examples

Technical data


EAC_RU C-DE.MO05.B.00971/20CCC_2020980305000503_CQC2009010305380680DGUV_SGA_ET 22058_ET 22059c_UL_us_E155795_2/4

Electrical connection values

Rated insulation voltage Ui 32 V
Rated impulse withstand voltage Uimp 1.5 kV
Utilization category
DC-13 1 A 24 V
Short circuit protection according to IEC 60269-1 1A gG
Switching voltage
min. at 10 mA 12 V
Switching current
min. at 24 V 1 mA
thermal rated current Ith 1 A

Mechanical values and environment

Approach speed max. 20 m/min
Approach direction A
Connection type
1 x Plug connector RC18 (18-pin + PE)
Number of door position positively driven contacts 4
Extraction force 25 N
Actuation frequency max. 6700 1/h
Actuating force 25 N
Installation orientation any
Insertion depth 24.5 mm
Mechanical life 2 x 10⁶
Retention force 10 N
Switching principle Slow-action switching contact
Degree of protection IP54
Ambient temperature -20 ... +80 °C
Contact Silver alloy, gold flashed
Housing Die-cast alloy, cathodically dipped

Characteristic values according to EN ISO 13849-1 and EN IEC 62061

B10DMission time
Monitoring of the guard position3x10620 y
Important! Values valid at DC-13 100 mA/24V


Additional feature
2 x pushbutton yellow, white (illuminated) (24 V (max. breaking capacity 250 mW))

In combination with actuator ACTUATOR-S-GT-SN

Overtravel 5 mm



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, 5,7 MB)

Single Documents

Other Documents

Ordering data

Ordernumber 104012
Item designation SGA2A-2121ARC18-EXT5
Gross weight 0,188kg
Customs tariff number 85371098
ECLASS 27-27-26-02 Safety switch with separate actuator (Type 2)

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