Beckwith Electronics

Hamburg, Illinois 62045
(618) 232-1139

(618) 232-1172 fax

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EAO Switch

Series 51/52
Subminiature Lighted Oil & Watertight Indicators and Pushbuttons (Series 51) and 2- and 3-Position Rotary Switches (series 52) with 16 mm Round Hole Mounting

Features:
250 VAC/5 A, 220 VDC/0.1 A, 24 VDC/2 A snap action, 42 VAC/0.1 A, 42 VDC/0.1A low level
Minimum depth: 1.14"
Sealed switches meet IP 65 and NEMA 4 and 13 specifications
Mount in panels to 0.255 inch thick


To order:
Series 51: first select pushbutton or indicator desired, indicating contact and terminal type where applicable. Then order lens and illumination separateky. If pushbutton with contact block is desired, order acutator, contact block, lens and illumination separately.
Series 52: order rotary switch indicatijg contact and terminal type where applicable, Then order lever cap and illumination.

Order Lamps Separately.

Series 51 Lighted Pushbuttons
(Order lamp and lens separately)
Momentary
Switch Element Rectangular Square Round
Snap Action 1-pole Form Z 51-121.012
51-121.015
51-121.022
51-121.025
51-151.012
51-151.015
51-151.022
51-151.025
51-131.012
51-131.015
51-131.022
51-131.025
2-pole Form Z 51-122.015
51-122.025
51-152.015
51-152.025
51-132.015
51-132.025
3-pole Form Z 51-123.015
51-123.025
51-153.015
51-153.025
51-133.015
51-133.025
4-pole Form Z 51-124.015
51-124.025
51-154.015
51-154.025
51-134.015
51-134.025
Low Level 2 N.O. contacts 51-421.036 51-451.036 51-431.036
2 N.C. contacts 51-422.036 51-452.036 51-432.036
1 N.O., 1 N.C. contacts 51-423.036 51-453.036 51-433.036
1 N.O. contact 51-425.036 51-455.036 51-435.036
1 N.C. contact 51-426.036 51-456.036 51-436.036
Maintained
Switch Element Rectangular Square Round
Snap Action 1-pole Form Z 51-261.012
51-261.015
51-261.022
51-261.025
51-281.012
51-281.015
51-281.022
51-281.025
51-271.012
51-271.015
51-271.022
51-271.025
2-pole Form Z 51-262.015
51-262.025
51-282.015
51-282.025
51-272.015
51-272.025
3-pole Form Z 51-263.015
51-263.025
51-283.015
51-283.025
51-273.015
51-273.025
4-pole Form Z 51-264.015
51-264.025
51-284.015
51-284.025
51-274.015
51-274.025
Low Level 2 N.O. contacts 51-461.036 51-481.036 51-471.036
2 N.C. contacts 51-462.036 51-482.036 51-472.036
1 N.O., 1 N.C. contacts 51-463.036 51-483.036 51-473.036
1 N.O. contact 51-465.036 51-485.036 51-475.036
1 N.C. contact 51-466.036 51-486.036 51-476.036
Combined Momentary/Maintained
Switch Element Rectangular Square Round
Snap Action,
Form Z
Momentary 1PDT and
Maintained 1PDT
51-101.015
51-101.025
51-104.015
51-104.025
51-107.015
51-107.025
Momentary 1 PDT and
Maintained 2 PDT
51-102.015
51-102.025
51-105.015
51-105.025
51-108.015
51-108.025
Momentary 2 PDT and
Maintained 1 PDT
51-103.015
51-103.025
51-106.015
51-106.025
51-109.015
51-109.025
Lighted Indicators
Description Rectangular Square Round
Indicators For 0.110" Q.C.
terminals
51-040.002 51-050.002 51-030.002
Solder terminals 51-040.005 51-050.005 51-030.005
Length matches low
level and universal
terminals
51-041.006 51-050.006 51-031.006

Select contact and terminal type where applicable
.0
1st digit is always 0 (Case color is black)
Contact material (2nd digit): 1 = Silver, 2 = Gold over silver
Terminal type (3rd digit): 2 = 0.110" Q.C., 5 = Solder


Lenses
 Add color digit
Description Rect. Square Round 0 1 2 3 4 5 6 7 8 9
Flat Lens Translucent 51-901.0 Opaque Black
51-901.2 Red
51-901.3 Orange
51-901.4 Yellow
51-901.5 Green
51-901.6 Blue
51-901.8 Opaque Gray
51-901.9 White
51-951.0 Opaque Black
51-951.2 Red
51-951.3 Orange
51-951.4 Yellow
51-951.5 Green
51-951.6 Blue
51-951.8 Opaque Gray
51-951.9 White
51-931.0 Opaque Black
51-931.2 Red
51-931.3 Orange
51-931.4 Yellow
51-931.5 Green
51-931.6 Blue
51-931.8 Opaque Gray
51-931.9 White
X   X X X X X   X X
Transparent 51-903.1 Solar Black
51-903.2 Red
51-903.3 Orange
51-903.4 Yellow
51-903.5 Green
51-903.6 Blue
51-903.7 Clear
51-953.1 Solar Black
51-953.2 Red
51-953.3 Orange
51-953.4 Yellow
51-953.5 Green
51-953.6 Blue
51-953.7 Clear
51-933.1 Solar Black
51-933.2 Red
51-933.3 Orange
51-933.4 Yellow
51-933.5 Green
51-933.6 Blue
51-933.7 Clear
  X X X X X X X    
Transparent
with clear
diffuser
51-905.2 Red
51-905.4 Yellow
51-905.5 Green
51-905.7 Clear
51-955.2 Red
51-955.4 Yellow
51-955.5 Green
51-955.7 Clear
51-935.2 Red
51-935.4 Yellow
51-935.5 Green
51-935.7 Clear
    X   X X   X    
Concave Translucent Discontinued
for reference only

51-902.

Discontinued
for reference only

51-952.

  X   X X X X X   X X
Transparent 51-904.2 Red
51-904.3 Orange
51-904.4 Yellow
51-904.5 Green
51-904.6 Blue
51-904.7 Clear
51-954.2 Red
51-954.3 Orange
51-954.4 Yellow
51-954.5 Green
51-954.6 Blue
51-954.7 Clear
      X X X X X X    
Transparent
with clear
diffuser
Discontinued
for reference only

51-906.

Discontinued
for reference only

51-956.

      X   X X   X    
0=Black, 1=Solar Black*, 2=Red, 3=Orange, 4=Yellow, 5=Green, 6=Blue
7= Clear, 8=Gray, 9= White. Black and Gray are opaque.
*Dead Front - Legend only visible when illuminated.

Series 51 Pushbuttons and Indicators
without Snap Action Contact Blocks

(Order lamp and lens separately)
Description Rectangular Square Round
Momentary pushbutton
actuator without
contact block
51-165.0 51-185.0 51-175.0
Maintained pushbutton
actuator without
contact block
51-265.0 51-285.0 51-275.0
Indicator without
element block
51-042.0 51-052.0 51-032.0

Contact Block & Indicator Elements
Description Part Number Suffix Numbers
Contact Material Terminal Type
Element block for indicator 51-970.0 0 2
Contact block
with 1 pole
51-971.0 2 2
Contact block
with 2 poles
51-972.022
Old # 51-972.0
2 2

Series 52 Lighted Two-Position Rotary Switch
(Order lamp and lens separately)
Switch Elements Momentary
Maintained
Snap Action 1-pole Form Z 52-131.012
52-131.015
52-131.022
52-131.025
52-271.012
52-271.015
52-271.022
52-271.025
2-pole Form Z 52-132.015
52-132.025
52-272.015
52-272.025
3-pole Form Z 52-133.015
52-133.025
52-273.015
52-273.025
4-pole Form Z 52-134.015
52-134.025
52-274.015
52-274.025
Low Level 2 N.O. contacts 52-431.036 52-471.036
2 N.C. contacts 52-432.036 52-472.036
1 N.O., 1 N.C. 52-433.036 52-473.036
1 N.O. contact 52-435.036 52-475.036
1 N.C. contact 52-436.036 52-476.036

Select contact and terminal type where applicable .0
1st digit is always 0 (Case color is black)
Contact material (2nd digit): 1 = Silver, 2 = Gold over Silver
Terminal type (3rd digit): 2 = 0.110" Q.C., 5 = Solder

Square Bezel Insert
(Order lamp and lens separately)
Description Part Number
To change round bezel to 24 x 24 mm 52-950.0
To cange round bezel to 26 x 26 mm 52-952.0

Lighted Three-Position
Rotary Switch

(Order lamp and lens separately)
Description
Position A - always maintained
with no operation of switch elements
Position B & C - operate independent SPDT switch element.
Part Number
Positions B,C - Maintained 52-571.022A
Position B,C - Momentary 52-572.022A
Position B - Momentary, Position C - Maintained 52-573.022A
Position B - Maintained, Position C - Momentary 52-574.022A

Lens Cap
Add color digit
Lens Cap with Translucent
Colored Window
Part Number
Black Lens Cap Gray Lens Cap
with indicating dot 52-928.0 Opaque Black
52-928.2 Red
52-928.3 Orange
52-928.4 Yellow
52-928.5 Green
52-928.6 Blue
52-928.8 Opaque Gray
52-928.9 White
52-929.0 Opaque Black
52-929.2 Red
52-929.3 Orange
52-929.4 Yellow
52-929.5 Green
52-929.6 Blue
52-929.8 Opaque Gray
52-929.9 White
Note: Some Part Numbers Have a Following Zero. (52-928.50)

 Select color of translucent window
0= Black, 2= Red, 3= Orange, 4= Yellow, 5= Green, 6= Blue, 8= Gray, 9= White.
Black and Gray are opaque. NOTE: Black lens cap not available with Gray window,
Gray lens cap not available with Black window.