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Solenoids > Linear Solenoids: Selection Guidelines - Magnetic Latching Solenoids
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Magnetic Latching Selection |
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Product comparison and links to datasheets |
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Magnetic Latching Designs |
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STA® Tubular |
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In the pull type tubular
design, the plunger is
pulled into the solenoid
coil when the coil is
energized. The tubular
design offers the most
compact package
size to force ratio and
substantially longer life. |
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Box Frame |
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This solenoid has a
4-sided closed box
frame and solid plunger
and is, therefore, more
electrically efficient than
the C Frame solenoid.
The closed, box frame
also provides improved
mechanical strength. |
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C Frame |
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C Frame solenoids
consist of a formed Cshaped
steel frame and
solid plunger. Therefore,
these solenoids are less
efficient and less costly
than their Box Frame
counterparts. |
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Performance Curves |
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The performance curves
in this section serve as
guides to determine the
solenoid size needed to
produce a desired force
at a given stroke, duty
cycle, and power source.
All curves were developed
under the following standard
test conditions: ambient
temperature of 20°C, 65%
relative humidity. |
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Starting Force |
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When determining
an application's force
requirement, apply a 1.5
safety factor. For example: a
load requiring 0.2 lb of force
should utilize a solenoid
providing 0.2 x 1.5 or 0.35 lb
of force. |
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Duty Cycle |
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Magnetic Latching
solenoids are rated for low
duty cycle applications.
Duty cycle is determined
by: ON time/(ON + OFF
time).
For example: a solenoid is
actuated for 30 seconds, then
off for 90 seconds.
30 sec ON / (30 Sec ON + 90
sec OFF) = 30/120 =
1/4 or 25% duty cycle.
Note that maximum
ON time for a particular
application can be a factor
which overrides the duty
cycle rating. For example,
at 25% duty cycle, the
maximum ON time for a
given Ledex solenoid is 36
seconds. If, however, the
solenoid is operated at a
cycle rate which enables the
unit to return to ambient
temperature between ON
cycles, then the maximum
ON time is extended
somewhat. In the above
example, this extended
ON time is 44 seconds.
Maximum ON time ratings
are listed on the individual
model specification pages. |
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Life |
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The STA® tubular
design offers a life of
25,000,000 actuations.
The open frame designs
provide 50,000 to 100,000
actuations. |
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Power Requirements
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Voltage applied to the
solenoid must be matched
to the coil wire size for
proper operation. Solenoids
are typically cataloged in
coil awgs ranging from #23
up to #38 to accommodate
your input power.
Refer to the individual
model specification
pages for coil wire awg
recommendations. Many
other coil awg sizes are
available. Please feel free
to contact our application
engineering department
for availability. |
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Options and
Modified Designs |
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Even though many
solenoid designs are
in stock and available
via distribution, our
customers often require
a product with unique
features or performance
capabilities. In fact, almost
80% of all solenoids
that we make are either
modified or custom built to
meet our customers' exact
application requirements.
So, if you don't find what
you're looking for in the
catalog, give us a call to
discuss your needs with
one of our application
engineers. |
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Typical Examples of
Custom Feature |
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Metric Products
STA® Tubular Magnetic Latching Selection Overview* |
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Solenoid
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Package Dimensions
(mm)
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Max Stroke
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Nominal
Stroke
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Force (N) @ Nominal Stroke
and Specified Duty Cycle
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Size
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Type
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Dia.
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Length
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(mm)
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(mm)
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50%
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25%
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10%
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STA 13 x 16
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Pull
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13.2
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15.7
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3.8
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1.9
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1.11
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2.14
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3.34
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| * All data is at 20°C coil temperature. Force outputs degrade with elevated temperatures. |
Metric Products
Box Frame and C Frame Magnetic Latching Selection Overview* |
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Size
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Frame
Type
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Coil
Type(1)
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Height
(mm)
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Width
(mm)
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Length
(mm) |
Max.
Stroke
(mm) |
Nominal
Stroke
(mm) |
Force (N)
@ Nominal Stroke
and Specified Duty Cycle |
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B14M-L
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Box
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T
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25.9
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20.1
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36.8
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15.2
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2.5
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8.9
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B16M-L
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Box
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T
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12.2
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9.9
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25.1
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3.8
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1.3
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0.7
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B17M-L
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Box
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T
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15.0
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13.0
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20.0
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4.1
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2.0
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0.9
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B22M-L
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Box
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OM
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37.3
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33.3
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40.9
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8.9
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2.5
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14.7
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C5M-L
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C
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T |
11.7
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10.4
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23.9
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5.1
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1.3
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1.8
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C
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OM |
20.6
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19.1
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28.6
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12.7
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5.1
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2.7
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| * All data is at 20°C coil temperature. Force outputs degrade with elevated temperatures. |
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Imperial Products
STA® Tubular Magnetic Latching Selection Overview* |
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Solenoid
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Package Dimensions
(in)
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Max Stroke
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Nominal
Stroke
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Force (lbs) @ Nominal Stroke
and Specified Duty Cycle
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Size
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Type
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Dia.
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Length
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(in)
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(in)
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50%
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25%
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10%
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STA 1/2" x 1/2"
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Pull
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0.52
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0.62
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0.15
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0.075
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0.25
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0.48
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0.75
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| * All data is at 20°C coil temperature. Force outputs degrade with elevated temperatures. |
Imperial Products
Box Frame and C Frame Magnetic Latching Selection Overview* |
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Size
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Frame
Type
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Coil
Type(1)
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Height
(in)
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Width
(in)
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Length
(in) |
Max.
Stroke
(in) |
Nominal
Stroke
(in) |
Force (lbs)
@ Nominal Stroke
and Specified Duty Cycle |
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B14-L
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Box
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T
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1.02
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0.79
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1.45 |
0.6 |
0.10 |
2 |
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B16-L
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Box
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T
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0.48
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0.39
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0.99 |
0.15 |
0.05 |
0.15 |
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B17-L
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Box
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T
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0.59
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0.51
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0.79 |
0.16 |
0.08 |
0.2 |
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B22-L
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Box
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OM
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1.47
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1.31
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1.61 |
0.35 |
0.10 |
3.3 |
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C5-L
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C
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T |
0.46
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0.41
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0.94 |
0.20 |
0.05 |
0.4 |
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C
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OM |
0.81 |
0.75 |
1.13 |
0.50 |
0.20 |
0.6 |
| * All data is at 20°C coil temperature. Force outputs degrade with elevated temperatures. |
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File Format Help
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L322
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