ProductsI Arcolectric
Toggle Switches
3900 with Guard
3900 with Guard 
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  • Metal lever switches
  • Ratings up to 20A, 277V ac
  • Singles and double pole
  • Choice of circuits including 3 position and momentary
  • 6.3mm and solder terminals
  • Guard option


ENEC 15 Logo

16(4)A 250Vac T85 (3900 & 3950)
10(4)A 250Vac T85 (All other circuits)

RU standardCSA standard

UL CSA 20A 125/277Vac (ON-OFF Circuits)
UL CSA 16A 125/277Vac (Other Circuits)
UL CSA 7A 72Vdc, 14A 36Vdc
UL 250Vac 1hp. 125Vac 1/2hp
UL 65°C, file E45221, CSA file LR10990

RoHS Compliant

RoHS Compliant


Number Function Contact Notes
3900 ON-OFF Single Pole  
3901 ON-OFF Single Pole Momentary ON
3902 ON-OFF Single Pole Momentary OFF
3910 ON-ON Single Pole  
3911 ON-ON Single Pole Momentary 1 side
3920 ON-OFF Single Pole  
3921 ON-OFF-ON Single Pole Momentary 1 side
3922 ON-OFF-ON Single Pole Momentary 2 side
3950 ON-OFF Double Pole  
3951 ON-OFF Double Pole Momentary ON
3952 ON-OFF Double Pole Momentary OFF
3960 ON-ON Double Pole  
3961 ON-ON Double Pole Momentary 1 side
3970 ON-OFF-ON Double Pole  
3971 ON-OFF-ON Double Pole Momentary 1 side
3972 ON-OFF-ON Double Pole Momentary 2 side


Terminal Options  
Code Size
C 6.3x0.8mm
T Solder
Panel and Bezel Dimensions (mm)
Code Description
A Without terminal barrier, single pole
B With terminal barrier, double pole only
Actuator Options
Code Profile
B 17.5mm

Further Options

Options include: Neck seal, Cover, Fixing nuts and Guards

Product Code

Product Code: Terminal Option + Switch Function + Actuator Option + Bezel Option + Further Options e.g. C3900BA + further options. See datasheet for further information.

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