MICRO-LIMIT SWITCHES
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
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APEM
, PO BOX 8288, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (781) 245-4531 E-mail: info@apem.com
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MICRO-LIMIT SWITCHES
Micro-limit pushbutton switches
are used in many applications including microwave ovens,
vending machines, copy and fax machines, medical and security equipment, computer peripherals
and many others. They are characterized by close tolerance precision switching positions and long
service life. APEM micro-limit switches are 100% electronic tested prior to shipment to insure
proper operation and conformance with specifications.
DEFINITIONS OF TERMS
Free position
Position of the switch actuator when no force is
applied.
Operating position
The position of the actuator when the contact snaps.
Overtravel position
The final position of the actuator.
Release position
The position of the actuator when the contact snaps
back from the operating position to original position.
Contact opening gap
The distance between the open contact pair.
Pretravel
The distance between free and operating positions.
Overtravel
The distance the actuator travels after the contact
actuates.
Movement differential
The distance from the operating to release position of
the actuator.
Free travel
The distance between the release and free positions.
1
2
3
4
A
B
C
D
E
F
I
II
III
IV
free position
operating position
overtravel position
release position
total travel
free travel
back travel
pretravel
overtravel
movement differential
total force
operating force
differential force
release force
Back travel
The distance between the overtravel and release
positions.
Total travel
The sum of pretravel and overtravel.
Operating force
The force required to cause snap action of contact.
End operating force
The force to be applied to keep the actuator in the
allowed final position.
Release force
The force applied to the actuator at the moment the
contact snaps back from the operating position.
Differential force
The difference between the operating force and the
release force.
Mechanical life
The minimum number of actuations with no load on
the switch.
Electrical life
The minimum number of actuations at rated voltage,
rated current and resistive load at 20°C ambient
temperature.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
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FORCE vs.
TRAVEL
DIAGRAM
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APEM
, PO BOX 8288, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (781) 245-4531 E-mail: info@apem.com
MA SERIES - MICRO-LIMIT SWITCHES
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
FEATURES
G
Ratings: 16 Amps 250 VAC (resistive load). 4 Amps 250 VAC (motor load) or
3 Amps 250 VAC (resistive load). 0.1 Amps 250 VAC (motor load).
Single pole CO (change-over or alternate action), NC (normally closed momentary) and
NO (normally open momentary) configurations.
Close tolerance switching action with long life (10,000,000 mechanical cycles min.).
Pin plunger, hinge lever or roller lever actuator options.
G
G
G
MATERIALS
Contacts:
Actuator:
Case & cover:
Terminals:
Stationary: Nicker silver Shorting: Beryllium copper
FS 161 (UL94V-O)
PBT (UL94V-O)
Silver plated copper/zinc
AGENCY RECOGNITION
NRTL
Approval pending.
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SPECIFICATIONS
Operating force:
Pretravel:
Overtravel:
Movement differential:
Free position:
Operating position:
Operating temperature:
Contact gap:
Tracking resistance:
≤
12.59 oz. (343 grams) approx. for 16 Amp models
≤
0.72 oz. (20 grams) approx. for 3 Amp models
≤
.047" (1.2mm)
≥
.059" (1.5mm) min.
≤
.016" (0.4mm)
≤
.649" (16.5mm)
.578"
±
.020" (14.7mm
±
0.5mm)
-40°C to +85°C
less than .118" (3mm)
> PTI 175
APEM
, PO BOX 8288, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (781) 245-4531 E-mail: info@apem.com
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MA SERIES - MICRO-LIMIT SWITCHES
ORDER FORMAT
M A A 6 B
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Series
MA
Circuit & quick-connect terminals
A
B
C
D
E
F
G
H
I
J
K
L
Switch rating
Actuator style
A
Pin actuator
B
Hinge actuator
C
Roller actuator
Normally open (standard) .031 x .248" (0.8x6.3mm)
6
16(4)A 250 VAC
Normally closed (standard) .031 x .248" (0.8x6.3mm)
7
3(0.1)A 250 VAC
Change-over (standard) .031 x .248" (0.8x6.3mm)
Normally open, .031 x .248" (0.8x6.3mm), spacing .197" (5mm)
Normally closed, .031 x .248" (0.8x6.3mm), spacing .197" (5mm)
Change-over, .031 x .248" (0.8x6.3mm), spacing .197" (5mm)
Normally open, .020 x .189" (0.5x4.8mm)
Normally closed, .020 x .189" (0.5x4.8mm)
Change-over, .020 x .189" (0.5x4.8mm)
Normally open, .031 x .189" (0.8x4.8mm)
Normally closed, .031 x .189" (0.8x4.8mm)
Change-over, .031 x .189" (0.8x4.8mm)
STANDARD MODELS
Quick-connect
terminal
.031x.248"
(0.8x6.3mm)
.031x.248"
(0.8x6.3mm)
pin spacing -
.197"(5mm)
16(4)A
MAD6A
MAE6A
MAF6A
MAD6B
MAE6B
MAF6B
MAD6C
MAE6C
MAF6C
.020x.189"
(0.5x4.8mm)
.031x.189"
(0.8x4.8mm)
Switching capacity
Pin plunger
NO
NC
CO
NO
NC
CO
NO
NC
CO
16(4)A
3(0.1)A
16(4)A
3(0.1)A
16(4)A
3(0.1)A
H
Hinge lever
MAA6A MAA7A
MAB6A MAB7A
MAC6A MAC7A
MAA6B
MAB6B
MAC6B
MAA6C
MAB6C
MAC6C
-
-
-
-
-
-
MAG6A MAG7A
MAH6A MAH7A
MAI6A MAI7A
MAG6B
MAH6B
MAI6B
MAG6C
MAH6C
MAI6C
-
-
-
-
-
-
MAJ6A MAJ7A
MAK6A MAK7A
MAL6A MAL7A
MAJ6B
MAK6B
MAL6B
MAJ6C
MAK6C
MAL6C
-
-
-
-
-
-
Roller lever
NO =
NORMALLY OPEN:
NC =
NORMALLY CLOSED:
NC (2)
CO =
CHANGE-OVER:
NC (2)
COM (1)
NO (4)
COM (1)
NO (4)
COM (1)
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APEM
, PO BOX 8288, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (781) 245-4531 E-mail: info@apem.com
MA SERIES - MICRO-LIMIT SWITCHES
MECHANICAL OUTLINES
Models with quick-connect terminal .031x.248" (0.8x6.3mm)
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Normally open
Change-over
Side view
Normally closed
Quick-connect terminal
H
Hinge lever
Roller lever
APEM
, PO BOX 8288, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (781) 245-4531 E-mail: info@apem.com
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