M3950/17 & M83731/25
Distinctive features
QPL listed toggle switches - threaded bushing Ø 11,9 (15/32)
K
Approval and lists
M3950/17
M83731/25
QPL listed
This range of professional toggle switches is suitable for use in military and
other high specification environments.
K
Contacts
K
Pinned lever
Highly reliable contacts suitable for low level applications (10mA 50mV -
10µA 5VDC min.) or power applications (2A 250VAC - 4A 125VAC -
4A 30VDC max.)
K
Double shell case
K
Compact size
K
Finish
The base of the switch lever is pinned to the bushing, thus earthing the lever to
the bushing. This also provides strain relief to protect the switch if accidentally
knocked.
For high mechanical strength and high electrical insulation.
The small rear end of the switch allows space saving behind the panel.
Matt black finish on body, bushing, lever and hardware.
Panel sealed to IP 67, these switches are frontal sealed by two O-rings and
have full rear end sealing.
A comprehensive range of protection boots (both full and half length), locking
levers and security caps are available.
K
Sealing
K
Accessories
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APEM
M3950/17 & M83731/25
ELECTRICAL SPECIFICATIONS
QPL listed toggle switches - threaded bushing Ø 11,9 (15/32)
Specifications
•
Max. current/voltage rating with resistive load : 2A 250VAC - 4A 125VAC - 4A 28VDC
• Minimum load : 10mA 50mV, 10µA 5VDC
When used above 300mA 28VDC, the gold plating is removed on contact areas and is considered only as a
protection against oxidation during storage.
• Initial contact resistance : 10 mΩ max.
Volts
• Insulation resistance : 1.000 MΩ min. at 500VDC
250 VAC
• Dielectric strength :
1.000 Vrms 50 Hz min. between terminals
125 VAC
2.000 Vrms 50 Hz min. between poles
2.000 Vrms 50 Hz min. between terminals and frame
• Contact bounce : 2 ms max.
• Electrical life :
48 VDC
- At 2A 250VAC - 4A 28VDC :
20.000 cycles (10.000 for functions 5, 4-1R, 4-2R)
28 VDC
- At low level (50mV 10mA) :
5 VDC
150.000 cycles (switches with 2 maintained positions)
50 mV
100.000 cycles (switches with 3 maintained positions)
Amps
10mA
10µA
2A
1A
4A
50.000 cycles (momentary functions 7, 8, 4-1R, 4-2R, 5)
MATERIALS
SEALING
•
Case: diallylphthalate (DAP)
with plastic external shell
(epoxy sealed)
• Actuator: brass, black chrome
plated
• Bushing : brass, black chrome
plated
• Contacts : solid rivet -
gold plated silver/nickel alloy
• Panel seal withstands 1 bar pressure and
remains sealed even when the switch is operated.
• Splash-proof case
• Epoxy sealed terminals
1
•
Front panel sealing by two O-rings
Flatted bush for precise orientation
©
Flat
O-rings
•
Torque : 1,50 Nm (1.10 Ft.lb) max. applied to nut
• Panel thickness : 8 mm (.314) max. - 3 mm (.118) min.
• Shock test : 50g - 11ms (IEC 68-2-27)
• Vibrations : 10-500 Hz - 10g (IEC68-2-6)
• Operating temperature : -40°C to +85°C
• Humidity test : 56 days, 93 % R.H., 40°C (IEC 68-2-3)
• Salt spray test : 96 hours (IEC 68-2-11)
GENERAL SPECIFICATIONS
All models within this range are QPL listed and comply with M3950
and M83731
APPROVALS
APEM
www.apem.com
M3950/17 & M83731/25
Overview
QPL listed toggle switches - threaded bushing Ø 11,9 (15/32)
M3950/17
M83731/25
Military designation
1
2
Solder lug terminals
Straight PC terminals
Terminals
6
9
7
8
4
5
ON
ON
MOM
ON
ON
ON
MOM
Electrical functions
-
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
MOM
MOM
ON
MOM 1/
MOM 1/
MOM
A
Non-momentary
ON MOM
B
1/ ON
C
1/ MOM ON MOM
D
Momentary
1/ For function 4 only.
Momentary
0
1
Fluorescent tip
None
White fluorescent
tip to lever
10
12
Standard lever
Short lever
Levers
1V
2V
3V
Locking levers
1 locked position
2 locked positions
3 locked positions
Dimensions
: first dimensions are in mm while inches are shown as bracketted numbers.
Sealing boots
can be used to further protect the switches against dust and water. They are presented in section H.
Mounting accessories
: standard hardware supplied with all models : 1 hex nut 14 mm (.551) across flats, part
number U41. This nut is presented after model structure of switches.
Packaging unit
: 20 pieces
Security caps
are available to prevent inadvertent lever operation. They are presented in section I.
.
ABOUT THIS SERIES
On the following pages, you will find successively :
- model structure of switches
- options in the same order as in above chart
www.apem.com
APEM
M3950/17 & M83731/25
Terminations
•
Solder lug or straight PC terminals
QPL listed toggle switches - threaded bushing Ø 11,9 (15/32)
Solder lug terminals - three pole
I
II
III
©
Flat
M3950/1726
M3950/1729
M3950/1727
M3950/1728
ON
-
ON
ON OFF
ON
MOM OFF MOM
ON OFF MOM
FLUORESCENT TIP
Blank
0.38
None
Standard lever
Locking lever
White fluorescent tip.
Becomes luminous when submitted to ultra-violet rays.
LEVERS
Levers
/
LOCKING LEVERS
Sealing boots : see section H.
Security caps : see section I.
-12
Short lever
Standard (leave blank)
Locking levers
©
Flat
APEM
1 locked position (function 6)
-1V
-2V
2 locked positions (function 6)
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-3V
3 locked positions (functions 9 and 4)
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