Basic Switches
MT Series
Magnetic Blow-out
FEATURES
GENERAL INFORMATION
MT (single-pole double-throw) magnetic
Mechanical life of 100,000 operations blow-out switches are designed to switch
— 95% survival high capacity (125 and 250 VDC) sys-
Temperature tolerance to +180°F tems. An integral magnet around the con-
ɀ
ɀ
Arc resistant case
ɀ
ɀ
ɀ
(82°C)
tact gap protects the contacts by deflect-
ing the arc. Vents between the cover and
housing allow the hot gas to escape.
These switches are designed for the con-
trol of DC motors, solenoids, etc.
Mounting interchangeability with
switches
Z
UL recognized
AVAILABLE TERMINALS
Solde r (No lis ting de s ignation)
A28
6-32NC ⍥ .218⍯ Screws
will accept up to # 12 wire.
ELECTRICAL RATING
Ele ctrical Data and
UL Code s
Circuitry
Single-pole
double-throw
unless
otherwise noted
in order guide
K
Rating established with
switch non-polarized
10 amps, 125 vac or vdc;
1/4 hp, 125 vac or vdc.
UL Code L 168
Non-polarized:
10 amps res. or 1/4 hp, 125 vdc;
3 amps max. res. 250 vdc.
Polarized*:
10 amps res. or 1/2 hp, 125 vdc;
3 amps max. res., 250 vdc.
*To polarize, connect negative side of line to common terminal. To
achieve the same effect, mount switch with brass screws, using a
non-magnetic barrier (at least 1⁄
mounting surface.
4
⍯ thick) between the switch and
Characteris tics : O.F. – Operating Force;
R.F. – Release Force; P.T. – Pretravel;
O.T. – Overtravel; D.T. – Differential Travel;
O.P. – Operating Position.
ORDER GUIDE
Ele ctrical
Data and
UL Code s
O.F.
newtons
ounce s
R.F. min. P.T. max. O.T. min.
D.T. max.
mm
inche s
O.P.
mm
inche s
newtons
mm
mm
Catalog Lis ting
MT-4R-A28
Re comme nde d For
ounce s
inche s
inche s
Pin plunger
SPDT
10 Amps
3,34-5,0
12-18
1,39
1,02
0,13
0,1-0,18
.004-.007
15,9±0,38
.625±.015
K
5
.04
.005
Dim. Dwg. Fig. 1
70 Honeywell Sensing and Control
For application help: call1-800-537-6945.
HONEYWELL [ Honeywell ]
