Product Overview
Sensing and Internet of Things 17
MICRO SWITCH Premium Large Basic Switches
LARGE PREMIUM SWITCH SERIES NOMENCLATURE TREE (NOT ALL CONFIGURATIONS AVAILABLE)
B
Type & Contact
Z
15 A capacity**;
pin plunger 23,3
[0.917] from
mounting hole
A
20 A capacity**;
pin plunger 19,0
[0.750] from
mounting hole
substitute
W Series
for SPNC circuitry
substitute
Y Series
for SPNO circuitry
Switch type
Z
B Series
Premium Basics
SPDT
S
Stainless steel
snap spring
S
1
2
0,25 mm [0.01 in]
0,50 mm [0.02 in]
3
0,91 mm [0.036 in]
4
1,14 mm [0.045 in]
(MT-4R only)
5
1,27 mm [0.050 in]
Type A switches only
7
1,78 mm [0.07 in]
Type Z switches only
-
0,15 mm [0.006 in]
Break distance
(nominal)
2
R
A
Moving contact
rivet construction
Shorting bar circuitry
Type Z switches only
S
Shorting bar circuitry
Type A switches only
G
Make-before-break
switches
Y
Split contact switches
Type Z switches only
Construction
R
B
D
Low overtravel
plunger, Type A & E
Low overtravel
plunger, Type Z
DS
Sealed low overtravel
plunger, Type Z only
L
Leaf actuator
Type A & Z only
N
High overtravel
plunger/sealed boot
Q
High overtravel
plunger, Type A & Z
S
Medium overtravel
plunger, Type Z only
V
Rigid lever
Type A & E only
W
Rigid or resilient
lever, Type Z only
M
Reverse actuating
lever
QW
Omnidirectional
“wobble” lever
-
Standard pin plunger
Integral actuator
W
A2
A4
Bottom facing #6
screws & cupwashers
Bottom facing #8
screws & cupwashers
A22
A2 type without
screws & cupwashers
A41
A4 type without
screws & cupwashers
A46
A4 type #8 screws
and lock washers
D1
89° QC used with
flat base w/o slots
D5
90° QC used with
flat base
D6
90° QC used with
A2 (step) base
P1
(left) side facing #8
screw w/ cupwasher
solder lug base
P2
Same as P1, except
facing right
P4
(left) side facing #8
screw w/ cupwasher
integral construction
P5
Same as P4, except
facing right
T
Bottom facing #6
screws/lockwashers
-
Solder lug or no
terminal hardware
Terminal type
A2
0
1
Before other number=
military construction
Threaded bushing,
panel mount Q-plunger
2
Variation of design
4
On W-lever, light
force var. (no spring)
5
Used with other 5s,
denotes sealed cons.
6/7
On Q plunger, replac.
for die-cast switches
7
Variation of design,
other than Q plungers
8
With W-levers, rigid
type lever (ex. W80)
8
With Q-plunger, roller
plunger inline to axis
9
With L-leaf actuators,
flat leaf
72
Gold contacts
9
22
On Q-plunger, detach.
roller, turned 90°
Short roller lever,
V- or W-lever
24
Heat resistant
construction 121 °C
55
Heavy-duty seal cons.
Stain steel snap spring,
Special inserts
81
On Q-plunger, roller
90° to major axis
82
Long W-lever,
with roller
99
On W-lever, adj.
O.P. (usually w/ 8)
244
High temp. constr.
Diff snap spring
Lower elect. rating
5551
General use
sealed construction
822
Short W-lever
with roller
X
Maintained manual
reset
Misc. Variations
(Numbers or Letters)
82255
M
22 A capacity;
pin plunger 23,3
[0.917] from
mounting hole
E
25 A capacity;
pin plunger 19,0
[0.750] from
mounting hole
Snap spring mat’l
(variation)
– ––
NOTES:
* Break distance between separated contacts (nominal values)
** Some versions have lower electrical ratings