Basic Switches
Standard
BZ/BA Series
FEATURES
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Operating force as low as 4 oz. (113
grams) maximum
Sensitive differential travel as low as
.0002 to .0003 inches (0,005 to 0,008
mm)
STANDARD BASIC SWITCH CUT-A-WAY
The cut-a-way shown is representative of the standard basic switches described in this
catalog.
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Power load switching capability to 25
amperes
Motor handling capacity to 2 horse-
power at 250 VAC
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Long mechanical life
High temperature constructions for up
to +400°F (204°C)
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Momentary or maintained contact
action
Alloy contacts available for special ap-
plication needs
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Variety of integral actuators
Variety of auxiliary actuators
Variety of terminal designs
Optional sealed plunger and cover
Stainless steel snap spring available
Military standard construction availa-
ble with over 50 listings on the MIL-
S-8805 Qualified products list
UL recognized, CSA certified
GENERAL INFORMATION
The type BZ switch design meets most
MICRO SWITCH standard basic switches applications needs. Modifications of the
are precision snap-action mechanisms standard silver contact design and mate-
enclosed in accurately molded plastic rial, spring configuration, and plunger lo-
cases. These switches are carefully man- cations give the type BM, BA and BE
ufactured and thoroughly inspected. switches greater electrical load handling
They are industry known for their com- capacity. Other changes in materials and
pactness, light weight, accurate repeata- switch design provide operating charac-
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Characteristics as stated are taken at nor-
mal room temperature and humidity.
These may vary as temperature and hu-
midity conditions differ.
bility and long life.
teristics, temperature tolerances, and
sealing to cover a wide range of special
requirements.
MOUNTING DIMENSIONS
Mounting dimensions are included at the
end of each product section. They are
shown in English and metric equivalents.
GENERAL SWITCH IDENTIFICATION
First letter in catalog listing designates:
These dimensions are for reference only. B = Single-pole double-throw
Forexacting layout work, request an engi- W = Single-pole single-throw (normally closed)
neering layout work, request an engineer- Y = Single-pole single-throw (normally open)
ing drawing from the 800 number.
Second letter in catalog listing designates:
Z = Standard 15-amp version
M = 22-amp version
A = Standard 20-amp version
E = 25-amp version
Mounting holes for Types BZ, BM, BA, BE,
DT, MT, and 6AS switches accept pins or
screws of .139 inch (3,53 mm) diameter.
RECOMMENDED TORQUE (max.)
Mounting screws . . . . . . . . . . . . 3 in./lbs.*
Terminal screws . . . . . . . . . . . . . . 4 in./lbs.
Panel mount bushing . . . . . . . 4-6 in./lbs.
This section covers only ove r 100 of our most popular BZ/BA type Series
catalog listings. If you don’t find what you’re looking for, it’s likely one of
the approximately 1800 other active listings will meet your needs. Con-
tact the 800 number.
*Note: Tightening mounting screws
above 3 in./lbs. changes operat-
ing characteristics and increases
the possibility of cracking the
case.
UL/CSA
Our basic switches are Component Recognized by Underwriters’ Laboratories, Inc. and certified by Canadian Standards Associ-
ation. The BA, BZ, and BM line is covered as Special Use Switches to UL Standard 1054; the BE line is covered as an Industrial Motor
Controller to UL Standard 508.
Agency File References
are:
BA
BM
BZ
BE-1,2,5
BE-R
UL File E12252, issued 12-09-88
UL File E12252, issued 12-08-88
UL File E12252, issued 6-29-89
UL File E22779, Vol. 4, Sec. 1
UL File E22779, Vol. 4, Sec. 2
For application help: call1-800-537-6945.
Honeywell Sensing and Control 47
HONEYWELL [ Honeywell ]
