242 Switches
Toggle Switches
Well known for their quality and reliability, Bulgin’s toggle
switches are cost eective solutions to many existing
applications. These switches oer features at an
attractive price point often well below that of the existing
competition.
Nylon and Metal switch variants
Multiple Lever Options
Ratings up to 20A, 250V ac - 277V ac
IP67 panel seal versions, supplied complete
with gaskets (3900 Series – All Variants)
Single and double pole
Choice of circuit options including 3 position
and momentary
Mounting hole: 12.7mm diameter.
Sealing accessories available
Quick Connect, Solder, Screw and PCB
Termination Options
Switches 243
3900 Metal Toggle Switches
16A 250Vac - IP67 Sealed Versions
Key Features
Metal toggle switches
Ratings up to 20A,
277V ac
Single and double pole
Choice of circuits
including 3 position and
momentary
Sealed version supplied
complete with gaskets
Neck Seal M539
Actuator is visible
Cover M1080
Covers have internal nylon nuts
M1080-2
Covers have internal metal hex nuts
Fixing nuts
Nickel plated brass are supplied
Knurled Front nut
Panel thickness 4.0 with backnut
Plate P236
Plate SP or DP
Single pole
A
Panel sealed, single pole
E
Double pole, without barrier
B
A
F
Panel sealed, double pole,
without terminal barrier
G
Single Pole Double Pole
3900
ON - OFF
3950
ON - OFF
3901
ON - OFF
(momentary ON)
3951
ON - OFF
(momentary ON)
3902
ON - OFF
(momentary OFF)
3952
ON - OFF
(momentary OFF)
3910
ON - ON
3960
ON - ON
3911
ON - ON
(momentary 1 side)
3961
ON - ON
(momentary 1 side)
3920
ON - OFF - ON μ
3970
ON - OFF - ON μ
3921
ON - OFF - ON μ
(momentary 1 side)
3971
ON - OFF - ON μ
(momentary 1 side)
3922
ON - OFF - ON μ
(momentary 2 sides)
3972
ON - OFF - ON μ
(momentary 2 sides)
A
Metal toggle nish is
nickel plate
Metal
B
38.1
E
F
17.5
D
25.4
Metal toggle nish is
nickel plate
Metal
10.0
Panel seal version to IP67
6.3mm terminals
Guard option
Terminal Actuator OptionsBodyFunction
C
6.3 x 0.8
S
Screw & Clamp
Switches with F toggles have
double pole bodies, regardless of circuit
Metal toggle nish is
nickel plate
Metal toggle nish is
nickel plate
Panel
Seal
Panel
Seal
Panel
Seal
Double pole, with barrier
Panel sealed, double pole,
with terminal barrier
T
Ø 3.1
Solder
244 Switches
C3900BE - - - C3972BB - - -
C3950BF - - -
C3920BA - - -
Examples
Approvals and specications
UL/CSA Ratings 3901, 3902, 3920, 3921, 3922
16A, 277Vac
1 HP, 250Vac
7A, 72Vdc
14A, 36Vdc
3910, 3901, 3952, 3960, 3961, 3970, 3971, 3972
16A, 277Vac
1 HP, 250Vac
1/2 HP, 125Vac
7A, 72Vdc
14A, 36Vdc
Dimensions
Single pole Double pole Toggle Switch - sealed version
Guard TG1-RED
mm) * Indicates ON position (for ON - OFF switches)
(C terminals shown) (C terminals shown with barrier) BE and BF types
Flat washer
(Panel seal)
Diaphragm
(Internal seal)
‘O’ ring seals
(Toggle seal)
3900, 3950
20A, 277Vac
1 HP, 250Vac
1/2 HP, 125Vac
7A, 72Vdc
14A, 36Vdc
ENEC Ratings
3900, 3901, 3902, 3950, 3952, 3960, 3961
16(4)A 250Vac
3910, 3911, 3920, 3921, 3922, 3951, 3970, 3972
10 4)A 250Vac
Approvals and ratings vary with function.
3mm contact gap except where marked μ.
* CSA approval for A and B bodies only
Switches 245
1700 & 1750 Series
Key Features
Nylon toggle switches
Ratings up to 20A,
250V ac
Single and double
pole
Wide choice of
terminals
Choice of circuit
options including 3
position
Flat & round actuator
options
Approvals and specications
16(4)A 250Vac T85
UL 20A 250Vac Non Ind (Single pole)
UL 16A 250Vac Non Ind (Double pole)
UL CSA (2 pos types) 250Vac 1hp, 125Vac 1/2hp
UL CSA (3 pos types) 250Vac 1/2hp, 125Vac 1/4hp
CSA 16A 250Vac Non Ind
UL 85°C, le E45221, CSA le LR10990
UL and CSA N/A on momentary types
Selective “A, B, C” and “OFF, A, A+B” circuits at 5
amp also available.
3mm contact gap except where marked μ.
Neck Seal M539
Material - Nitrile
(H & R Actuators)
Actuator visible
Cover M1080
Material - EPDM
(R Actuator only)
Cover M531
Material - PVC
(R Actuator only)
Covers have internal nylon
nuts
T
X
R
The switch is on
between centre
terminals (2 &
5) and
the terminals
over which
the lever is
positioned.
H
Fixing nuts
(Standard is M506 & T92)
T5 Hex brass
M506 Hex nylon
T92 Knurled brass -
slotted
M279 Knurled nylon
Plate P236
Plate SP or DP
Terminal Actuator OptionsBodyFunction
C
H
K
Single Pole Double Pole
1721 μ
ON - OFF - ON μ
(momentary 1 side)
1722
ON - OFF - ON μ
(momentary 2 sides)
1700
ON - OFF
1750
ON - OFF
1710 μ
ON - ON
1760 μ
ON - ON
1720 μ
ON - OFF - ON 1770 μ
ON - OFF - ON
Single pole
O
Double Pole
O
Panel thickness (Max)
Both nuts - 3.5mm
Less backnut - 6.5mm
Panel hole (all types)
246 Switches
Dimensions
Single pole Double pole
C1700R - - C1750H - -C1760R - -
C1700H - -
Examples
mm) * Indicates ON position (for ON - OFF switches)
(C terminals shown)
Optional
F00232PAAA
plate SP or DP
(C terminals shown)
Without barrier With barrier