S
NAP
A
CTION
S
WITCHES
U
LTRA
S
UB
-M
INIATURE
7
AMP
D
OUBLE
-B
REAK
S
NAP
A
CTION
S
WITCHES
Series 18 switches feature the Butterfly
®
double-
break momentary switch mechanism. This very
small package can carry a full 7 amp load (or low
current load).
A
PPLICATIONS
•
•
•
•
•
•
•
•
Industrial valve controls
Aircraft rotary actuator
Aircraft linear actuator
Float control pumps
Spool valves
Medical equipment
Aircraft fuel valves
Pressure switches
A
CTUAL
S
IZE
K
EY
F
EATURES
:
•
Gold contacts
•
Solder terminals
•
Meets MIL-S-8805/76
•
UL recognized and CSA certified:
7 amps @ 125/250 VAC
•
Lever and roller actuator are
available
O
RDERING
I
NFORMATION
:
Switches
Part Number
18-40421
18-488051
(MS27257-1)
Contacts
Gold Plated
Gold Plated
Terminals
End Solder
End Solder
RoHS Compliant
Actuator
(see page 70 for additional specifications)
Part Number
78-3000
Spring Lever
78-3100
Roller Lever
Oper. Force
6 ± 2 oz
6 ± 2 oz
Release Force
2 oz min
2 oz min
Pretravel
.125 max
.125 max
Overtravel
030 min
.030 min
Movement Diff.
.030 ± .015
.035 ± .015
Operating Point
.325 ± .030
.560±.030
S
TANDARDS
/ A
GENCY
/ R
ATINGS
:
®
RoHS
COMPLIANT
2002 / 95 / EC
V
D E
IEC
IP67
COMPLIANT
www.itwswitches.com
54
Contact an Authorized Distributor or Factory for Pricing
S
ERIES
18: U
LTRA
S
UB
-M
INIATURE
7
AMP
D
OUBLE
-B
REAK
P
RODUCT
D
RAWINGS
S
NAP
A
CTION
S
WITCHES
M
ECHANICAL
/ E
LECTRICAL
C
HARACTERISTICS
:
Pretravel:
0.030 inches max
Overtravel:
0.006 inches min
Operating Force:
5 oz + 3 oz - 2 oz
Release Force:
1.5 oz min
Movement Differential:
0.015 inches ± 0.005
Operating Point:
0.320 inches ± 0.015
(from mounting hole centers)
Circuit:
SPDT-DB (Form Z)
MIL-PRF-8805/77 QPL listed:
18-488051 MS27257-1
Electrical Rating @ 28VDC:
Circuitry
2 Circuit
(SPDT-DB)
1 Circuit
(SPST)
*L/R = .026
Current
5 amp Res
3 amp Ind*
8 amp Res
7 amp Ind*
Copyright © 2011 ITW Switches 2011
Designs and specifications are subject to change
without notice due to product improvement.
55
800.544.3354
A
CTUATORS
S
EE
P
AGE
54
FOR
S
WITCHES
K
EY
F
EATURES
:
•
Spring Lever
•
Roller Lever
M
ECHANICAL
C
HARACTERISTICS
:
Part Number
78-3000
Spring Lever
78-3100
Roller Lever
Oper. Force
6 ± 2 oz
6 ± 2 oz
Release Force
2 oz min
2 oz min
Pretravel
.125 max
.125 max
Overtravel
.030 min
.030 min
Movement Diff.
.030 ± .015
.035 ± .015
Operating Point
.325 ± .030
.560 ± .030
78-3000
78-3100
Copyright © 2011 ITW Switches 2011
www.itwswitches.com
70
Designs and specifications are subject to
change without notice due to product improvement.