25PS Datasheet, PDF (1/4 Pages) Texas Instruments – 25PS, 42PS, 44PS, 45PS and 46PS Series Pressure Switches

WORLD LEADER IN SENSING SOLUTIONS
Product Bulletin
25PS, 42PS, 44PS, 45PS and 46PS
Series Pressure Switches
Key Features
• SPST or SPDT switch with normally
open or closed contacts
• Electrically rated to 600 Vac (44/45PS)
• High cycle life capability (42/44PS)
• Factory calibrated pressure setpoints
from vacuum to 750 psig
• Snap-acting stainless steel
hermetically sealed sensor
• Available with environmentally
sealed switch
• High current capability
The 25PS series is an automatic
reset pressure switch designed to
meet a broad variety of application
requirements. This series is avail-
able in SPST and SPDT, offers a
variety of pressure settings, port
fittings and electrical connections.
Applications
This line of pressure switches is
designed for direct control of
motors and other demanding loads
requiring precise pressure settings.
Extended electrical capacities and
life cycles, in both environmentally
sealed and unsealed configurations,
encourage usage in the most rigor-
ous fan cycling and high/low
pressure protection applications.
The 46PS pressure switch is capable
of breaking 2 amp loads at 480 Vac
for 2.5 million cycles.† In applica-
tions such as split room air condi-
tioning systems, the 46PS as a head
pressure control can result in signifi-
cant cost savings when used instead
of a pilot duty switch and relay.
Operation
The snap-acting stainless steel
diaphragm reverses its curvature
when pressurized to a customer
specified value. When the disc
snaps, it opens or closes a set of
electrical contacts by means of a
transfer pin. Resetting the switch
occurs automatically when pressure
drops below a preset value.
Product Selection Matrix
Switch Life
Cycles
Application
Voltage
Environmental
Package
Model Number – Termination
250,000
480 - 600 Vac
28 Vdc - 240 Vac
Sealed
Unsealed
Sealed
Unsealed
44PS - Wire Leads
44PS - 1/4” Quick Connects
44PS - Wire Leads
42PS - Wire Leads or 1/4” Quick Connects
100,000
480 - 600 Vac
28 Vdc - 240 Vac
Sealed
Unsealed
Sealed
Unsealed
45PS - Wire Leads
45PS - 1/4” Quick Connects
45PS - Wire Leads
25PS - Wire Leads or 1/4” Quick Connects
2,500,000†
480 Vac
120 Vac - 240 Vac
Sealed
Unsealed
Sealed
Unsealed
46PS - Wire Leads
46PS - Wire Leads or 1/4” Quick Connects
46PS - Wire Leads
46PS - Wire Leads or 1/4” Quick Connects
†Qualified by application current. Requires TI/customer specification closure and validation testing before application approval.