Namco Controls EA990 Catalog Page
Single Pole
Limit
Butt
Severe Environment
Switches
Severe Environment Limit Switches
are available on the three standard series
of Snap-Lock switches. Regularly
furnished with wide or long mounting.
EA990 Single Pole 1 N.O. - 1 N.C. / Standard / Butt Contacts
Limit Switches
Standard Wide Long A B C D E F
Mounting Mounting Mounting Dir. Of Trip Reset Recom. Total Min. Travel Overall Torque Contact
Model No. Model No. Model No. Operation Travel Travel Travel Travel to Maintain Travel (inch lbs) Config.
STANDARD TRAVEL/ ROCKER TYPE
CW
— EA990-00125 EA990-00115 CW 10 ° 8 ° 13° 38° --14A
CW / REVERSE SHAFT
— EA990-00535 — CW 10° 8° 13° 38 ° --14A
CCW
— EA990-20055 EA990-20035 CCW 10° 8° 13° 38° --14B
MAINTAINED CONTACT AND LEVER POSITION
— EA990-30025 EA990-30045 Maintain 10° 8° 13° 38 ° --5-
Angle Angle Angle Angle Angle Angle
Contacts
278
Common Switch Characteristics
SINGLE POLE, SEVERE ENVIRONMENT, BUTT CONTACTS
Housing Material Zinc
Ambient Temperature Range -20°C to +90°C
Shipping Weight 3.7 lbs. approx.
Lever Adjustment 7°30’ Increments Thru 360°
Contacts Butt, Silver Alloy, Form Z
See Operating Levers Section
Namco • 2013 West Meeting Street • Lancaster, SC 29720 • 1-803-286-8491 • FAX: 1-800-678-6263
Continuous Current Rating - Amperes
VOLTAGE AC DC
125 20.0 5.0
250 15.0 1.5
480 10.0 600 5.0 -
75-100% Power Factor
Dimensions and Mounting
WIDE MOUNTING PLATE
48 Serrations
Equally Spaced
0.495/0.490 O.D.
0.13"
(3.3)
0.91"
(23.1)
2.69"
(68.3)
3.41"
(86.6)
1.09"
(27.7)
4.41"
(112.0)
0.78"
(19.8)
0.66"
(16.8)
0.31"
(7.9)
0.22"
(5.6)
2.44"
(62.0)
2.81"
(71.4)
3.25"
(82.6)
Four Mtg. Holes
0.256/0.258 Dia.
3.06"
(77.7)
0.56"
(14.2)
EA990
Limit Switches
LONG MOUNTING PLATE
Standard
1/4"-20 Thrd:
Four Mtg. Holes
0.50" Deep
Contact Configurations
CIRCUIT A
CW
Initial
D
B
2.31"
(58.7)
1.88"
(47.7)
Four Mtg. Holes
0.256/0.258 Dia.
0.13"
(3.3)
0.91"
(23.1)
(86.6)
2.69"
(68.3)
3.41"
1.09"
(27.7)
4.91"
(124.7)
0.06"
(1.5)
.47"
(11.9)
0.53"
(13.5)
3.69"
(93.7)
0.22"
(5.6)
0.25"
(6.4)
Dimensions: inches/(mm)
Operational Data Drawings
CCW
C
A
D
C
C
A
A
B
D
B
CIRCUIT B
CW
D
B
Initial
CCW
C
A
2013 West Meeting Street • Lancaster, SC 29720
1-803-286-8491 • FAX: 1-800-678-6263
www.namcocontrols.com
For technical assistance, call 1-800-NAMTECH
279
Miscellaneous
Operating
Butt
Types
0.50"
(12.7)
Limit Switches
0.25"
(6.4)
Standard Operating Lever
EL010-53420 (D-1260)
(for .500 Dia. Shaft Switches)
Levers
1.50"
(38.1)
0.88"
(22.2)
Contacts
For Series:
EA040, EA060, EA080,
EA130, EA140, EA170,
EA700, EA710, EA730,
EA760, EA770, EA780,
EA790, EA800, EA880,
EA990
Select the operating lever for your
application with regards to dimensions
and materials required.
Requests for operating levers not
shown should include lever style and all
pertinent information as to limit switch
number, dimensions, materials, etc.
Depending upon your application,
levers are available in cold rolled steel,
stainless steel, or bronze. Rollers are
available in steel, nylon, Bryl. Cop.,
stainless steel or steel ball bearings.
Please consult materials column of the
lever of your choice.
This style and size operating lever
is considered standard for the majority of
snap-lock switch installations. The
EL010-53420 (D1260) lever is steel with
a nylon roller and a stainless steel roller
pin. Like all snap-lock levers, the serrated
mounting hole matches the serrated lever
shaft of the switches to provide fixed
adjustment of the lever in 7.5° increments.
294
Namco Controls Corporation • Mayfield Village, OH 44143 • (440) 460-1360 • Fax: (440) 460-3800
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