MICRO SWITCH™ Specialty Large Basic Switches
BS | DT | MN | MT | TB Series
004956
Datasheet
Issue 3
FEATURES
• Double pole design in small package allows for control of two
independent circuits (DT Series and MN Series)
• Switch design with adjustable operating characteristics (BS
Series)
• Higher dc current capacity at 125 Vdc and 250 Vdc with
magnetic blow-out contact design (MT Series)
• Compact switch package with double-break contacts (MN
Series and TB Series)
• Variety of integral plunger and lever options or auxiliary
plunger and lever options
• Most switches mount on the common 25,4 mm [1.00 in]
centers
• Metal or plastic enclosures available to prevent contact with
switch terminals
• Select switch series with a temperature range of
-55 °C to 85 °C [-67 °F to 185 °F]
• Agency certifications with CSA and UL for select catalog
listings
• MIL-PRF-8805 for select DT Series catalog listings
DESCRIPTION
MICRO SWITCH™ premium specialty large snap-action
switches are designed for repeatability and enhanced life.
These series of precision switches feature application-specific
characteristics. From double-break circuitry to handling power
duty electrical loads, MICRO SWITCH™ premium large snap-
action switches are suitable for a variety of applications.
BS Series switches offer alternatives to solve challenging switch
applications. These unique solutions can provide adjustable
operating characteristics, sequential outputs, or impact
actuation (no external plunger).
DT Series switches consist of two independent single-pole
double throw (SPDT) contacts in one housing controlled by an
integral common actuator. The DPDT contact configuration
provides a contact for the control circuit and a different contact
for the signal or auxiliary circuit.
MT Series magnetic blow-out switches are designed to switch
high-capacity (125 Vdc/250 Vdc) electrical loads. An integral
magnet around the contact gap deflects the arc away from the
contacts, extending switch life. Vents between the cover and
housing allow the hot gas to escape.
Easy to gang mount, MN Series single pole double throw
double-break switches are for use with limit or control
mechanisms on machine tools, presses, or other equipment.
MICRO SWITCH™ TB Series miniature single pole double throw
double break switches offer a means of controlling circuits
similar to the MN Series switches except in a smaller package.
POTENTIAL APPLICATIONS
•
•
•
•
•
Temperature and pressure switch assemblies
Motor and solenoid dc control circuits
Welder control circuits
Switch element in machine tools
Switch element in manually operated devices
VALUE TO CUSTOMERS
• Can control two independent circuits in a small package (DT
Series and TB Series)
• Unique switch design with adjustable operating characteristics
(BS Series)
• Magnetic blow-out contact design permits control of dc
circuits in a small package size (MT Series)
• Double break switch design adds element of redundancy
within small switch package (MN series and TB Series)
PORTFOLIO
The five different series of premium specialty large basic
switches (BS Series, DT Series, MN Series, MT Series, and TB
Series) complements the four different families of premium large
basic switch series (BA
Series, BE Series, BM Series, and BZ
Series).
DIFFERENTIATION
• Double pole switch options in small package for increased
application flexibility
• Double break switch options in compact design requires less
space on equipment
• -55 °C [-67 °F] low temperature capability for harsh outdoor or
cold room applications
Sensing and Productivity Solutions
MICRO SWITCH™ Specialty Large Basic Switches BS | DT | MN | MT | TB Series
O.F. •
R.F. •
P.T. •
O.T. •
D.T. •
O.P. •
Operating force
Release force
Pretravel
Overtravel
Differential travel
Operating position
Table 2. BS Series Order Guide
Catalog
Listing
O.F.
N [oz]
R.F.
min.
N [oz]
P.T.
max.
mm
[in]
O.T.
min.
mm
[in]
Electrical
Data and
Code
Description
D.T.
mm [in]
O.P. max.
mm [in]
4BS3
Impact actuated (no
plunger)
–
0,39 [1.41],
5 to 8 G
force
0,20
[0.71]
–
–
–
–
6BS1-B
SPST-NO sequential
10 A
E
12,5 [45]
2,78
[10]
–
–
–
–
10BS210
Adjustable
characteristics
20 A
F
3,06 to 5,56
[11 to 20]
2,78
[10]
0,25
[0.010]
Max.
set-
ting,
0,18
[0.007]
16,3 [0.64]
16,3 [0.64]
Table 3. 6BS1-B Electrical Ratings and UL Code
Code
Circuitry
Electrical Data and UL Code
10 A, 125 Vac to 250 Vac
E
SPST-NO
sequential
1/3 HP, 125 Vac; 3/4 HP, 250 Vac
1/2 A, 125 Vdc; 1/4 A, 250 Vdc
UL Code L115
Figure 1. 6BS1-B Sequence of Operation
Table 4. 10BS210 Electrical Ratings and UL Code
Code
F
Circuitry
SPDT
Electrical Data and UL Code
20 A, 125 Vac, 250 Vac, 480 Vac
3/4 HP, 125 Vac; 1½ HP, 250 Vac
UL Code L17
Sensing and Productivity Solutions
3
MICRO SWITCH™ Specialty Large Basic Switches BS | DT | MN | MT | TB Series
O.F. •
R.F. •
P.T. •
O.T. •
D.T. •
O.P. •
Operating force
Release force
Pretravel
Overtravel
Differential travel
Operating position
Table 7. MT Series Order Guide
Catalog
Listing
O.F.
N [oz]
R.F.
min.
N [oz]
1,39
[5]
0,14
[0.5]
0,07
[0.25]
0,28
[1]
0,28
[1]
0,28
[1]
P.T.
max.
mm
[in]
1,02
[0.04]
12,7
[0.5]
8,89
[0.35]
5,08
[0.20]
6,35
[0.25]
6,35
[0.25]
O.T.
min.
mm
[in]
0,13
[0.005]
1,19
[0.047]
0,79
[0.031]
0,38
[0.015]
1,52
[0.060]
max.
1,52
[0.060]
max.
Electrical
Data and
Code
Description
D.T.
mm [in]
O.P. max.*
mm [in]
15,9 ±0,38
[0.625
±0.015]
19,1
[0.75]
30,2
[1.188]
31,3
[1.234]
19,1
[0.75]
30,2
[1.188]
MT-4R-A28
MT-4RV-A28
MT-4RV2-A28
MT-4RV22-A28
MT-4RL-A28
Pin plunger
Straight lever
48,3 mm [1.90 in]
lever with SST roller
26,2 mm [1.03 in]
lever with SST roller
49,5 mm [1.95 in]
flexible leaf
46,2 mm [1.82 in]
flexible leaf with SST
roller
10 A
B
10 A
B
10 A
B
10 A
B
10 A
B
10 A
B
3,34 to 5,0
[12 to 18]
0,56
[2]
0,76
[2.75]
1,25
[4.5]
3,34
[12]
3,34
[12]
0,1 to 0,18
[0.004 to 0.007]
2,16
[0.085]
1,65
[0.065]
0,89
[0.035]
–
MT-4RL2-A28
* ±0,76 mm [±0.030 in]
–
Table 8. MT Series Electrical Ratings and UL Code
Code
Circuitry
Electrical Data and UL Code
Rating established with switch non-polarized
10 A, 125 Vac or Vdc;
1/4 HP, 125 Vac or Vdc
UL Code L168
Non-polarized:
10 A res. or 1/4 HP, 125 Vdc;
3 A max. res. 250 Vdc
Polarized*:
10 A res. or 1/2 HP, 125 Vdc;
3 A 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 1⁄4 N thick) between the switch and
mounting surface
SPDT
B
Sensing and Productivity Solutions
5
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