25PS TI | Alldatasheet

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Technical content

W ORLD L EADER I N S ENSING S OLUTIONS 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 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.

Applications

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 44PS - Wire Leads 44PS - 1/4” Quick Connects 100,000 250,000 Switch Life Cycles Application Voltage Environmental Package Model Number – Termination Sealed Unsealed The 25PS series is an automatic reset pressure switch designed to meet a broad variety of application requirements. This series is avail- Sealed Unsealed Sealed Unsealed Sealed Unsealed 44PS - Wire Leads 42PS - Wire Leads or 1/4” Quick Connects 45PS - Wire Leads 45PS - 1/4” Quick Connects 45PS - Wire Leads 25PS - Wire Leads or 1/4” Quick Connects 480 - 600 Vac

28 Vdc - 240 Vac

able in SPST and SPDT, offers a variety of pressure settings, port fittings and electrical connections. 480 - 600 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. 2,500,000†

480 Vac

120 Vac - 240 Vac

46PS - Wire Leads or 1/4” Quick Connects 46PS - Wire Leads 46PS - Wire Leads or 1/4” Quick Connects The 46PS pressure switch is capable of breaking 2 amp loads at 480 Vac †Qualified by application current. Requires TI/customer specification closure and validation testing before application approva l.

Design Specifications – 25PS, 42PS, 44PS, 45PS, 46PS Vacuum to 750 psig 5000 psig 100,000 Cycles (25/45PS) 250,000 Cycles (42/44PS) 2,500,000 Cycles (46PS)†

750 Vrms across open contacts

1554 Vrms terminals to fitting (25/42PS)

2200 Vrms terminals to fitting (44/45/46PS)

-20oF to 150oF / -28.9oC to 65.6oC (Leaded) -40oF to 275oF / -40oCto135oC (QuickConnect) -65oF to 275oF / -53.9oC to 135oC UL Recognized File No. SA995 U.S.Guide No. SDFY2 / Canada No. SDFY8 PED CE0035 Module B/D ENEC Certified IP67 (Leaded) Operating Pressure: Burst Pressure: Life at rated Current: Dielectric Strength: Ambient Temperature: Fluid Temperature: Agency Approvals: Differential Range∆ 50 - 70 45 - 60 50 - 70 60 - 75 60 - 75 65 - 80 70 - 80 Minimum Tolerance Contact TI Upper Setpoint*** 10” Hg Min - 18 psig 15-50 psig 51-120 psig 121-250 psig 251-350 psig 351-500 psig 501-750 psig Standard Pressure Ranges *SPST - single pole, single throw. SPDT - single pole, double throw Switch logic at atmospheric pressure *Maximum UL recognized pressure rating is 750 psig: non-UL ratings to 1000 psig. † 25 amp rating for 25PS and 45PS only. For 42PS and 44PS, NC ratings same as NO ratings. Note 18 AWG. †† Qualified by application current. Validation testing required. ∆ Differential = (Lower Setpoint / Upper Setpoint) x 100 Typical Dimensional Drawings – 25PS, 42PS, 44PS, 45PS, 46PS Quick Connect Construction Leaded Construction .250 x .032 straight male spade terminal to mate with Amp #41800 female or equivalent All dimensions in inches. 25/42PS SPST 25/42PS SPDT NO NC NO NC 5.8 25† 25† 2.9 17.4 720 720 278 720 Device Switch Type** 5-28 Vdc Amps Inductive F L A L R A VA Pilot Duty

240 Vac

.122 .54 1.16 1.50 1.06 .54 2.00 1.27 Amps Res 25† 25† 34.8

120 Vac

F L A L R A VA Pilot Duty Amps Res F L A L R A F L A L R A 44/45/46PS SPST 44/45PS SPDT NO NC NO NC 5.8 25† 25† 2.9 17.4 720 720 278 720 25† 25† 34.8 480 480 278 480 3.2 3.2 19.2 19.2

480 Vac 600 Vac

Standard Fittings, others are available †Normally open contact on double throw switch is rated 5.8/2.9 Amps. Contact Marketing for additional product information. 1/4-18 NPTF-1A .83 (21) .27(6.9) .40 (10.2) MIN. TH’D. LG. 9/16 (14.3) HEX 1/8-27 NPTF-1A .63 (16) .27 (6.9) .26 (6.6) MIN. TH’D LG. 9/16 (14.3) HEX 9/16 (14.3) HEX 7/16-20 UNF-2B .09 (2.3) DIA. .53 (13.5) .26 (6.6) MIN. TH’D LG. .36 (9.1) .375 (9.5) .093 DIA. (2.4) .250 DIA. (6.4) .9 MIN. (22.9) .093 DIA. (2.4) .093 DIA. (2.4) .250 (6.4) .9 MIN. (22.9) .098±.002 DIA. .105±.003 DIA. .172±.005 DIA. (2.5±0.05) (2.7±0.07) (4.4±0.13) .56 DIA. (14.3) 1.27±.02 (32.3±0.51) .275±.002 (7±0.05) 2.074±.030 (52.68±0.76) A B C .77/.73 (19.6/18.5) .4245/.4193 DIA. (10.782/10.650) M10 X 1.25 Female O-ring .080/.100 DIA. (2.03/2.54) .417/.402 (10.59/10.21) .496 (12.6) MIN. FULL TH’D 1/4” Male Pipe Thread 1/8” Male Pipe Thread 1/4” Female Flare with Deflator Capillary Tube Fitting (3 Configurations) Tube Fitting (4 Configurations) Female O-Ring .125 (3.2) .205±.010 (5.2±0.3) .234-.238 (6) .145±.010 (3.7±0.25) .197 DIA. (5) A B C D .370±.010 (9.4±0.3) .250 DIA. (6.4) .250 DIA. (6.4) .140±.010 (3.5±0.3) Complete Product Directory of Texas Instruments Hermetic Pressure Switches Narrow differential, tight tolerance Dry circuit capability, extended life cycle Dry circuit capability, extended life cycle Narrow differential, tight tolerance Extended life cycle High current loads High current loads Extended life cycles at high current Extended life cycles, sealed configuration High current in sealed configuration High current loads Trip free manual reset Narrow differential, tight tolerance Small, lightweight High current loads Extended life cycles Extended life cycles, sealed configuration High current in sealed configuration Extended cycle life† Extended cycle life at high voltage High voltage capability Extended cycle life† 36PS 39PS 41PS 25PS 42PS 44PS 45PS 20PS 29PS 36PS PS80 25PS 42PS 44PS 45PS 46PS 44PS 45PS 46PS Auto Reset Auto Reset Auto reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Manual Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset SPST SPST SPST SPST SPST SPST SPST, SPDT SPST, SPDT SPST, SPDT SPST, SPDT SPST SPST SPST SPST SPST, SPDT† SPST, SPDT SPST, SPDT† SPST, SPDT† SPST, SPDT† SPST SPST SPST 5-28 Vdc 5-28 Vdc 5-28 Vdc 5-28 Vdc 5-28 Vdc 5-28 Vdc

28 Vdc

5.8/2.9 A 6.0/2.9 A 5.8/2.9 A 6.0 A 13/10 A 13/10 A 13/10 A 13/10 A 13/10 A 4.0/3.2 A 4.0/3.2 A 2 A 1,000 >250 >100 250 250 250 100 250 250 100 100 100 100 100 250 250 100 1,000+ 250 100 1,000+ Model Switch Operation Switch Configuration Application Voltage Electrical Current Switch Life Cycles (K)

Features

DC Voltage (<28V), Low Current DC Voltage (<28V), High Current AC Voltage (<240V), Low Current AC Voltage (<240V), High Current High AV Voltage (<600V), High Current 36PS 40PS 20PS

Description of Application Exact Function of Switch in System Cut In Pressure Tolerance Cut Out Pressure Tolerance Pressure Port Fitting Switch Termination Wire Lead Termination (e.g., 1/2 inch strip, 1/4 inch female Q.C, etc.) Sustained System Pressure Peak System Pressure Switch Logic (Contacts to open / close on Pressure Rise) Volts (AC/DC) Amps Inductive / Resistive Cycle Life Requirement Operating Temperature Allowable Drift Over temperature / Life Switch Environment (Protected/Unprotected) Agency Approvals (UL, VDE, TUV, ?) Estimated Annual Volume Important Notice: Texas Instruments (TI) reserves the right to make changes to or to discontinue any product or service identified in this publication without notice. TI advises its customers to obtain the latest version of the relevant information to verify, before placing orders, that the information being relied upon is current. Texas Instruments assumes no responsibility for infringement of patents or rights of others based on Texas Instruments applications assistance or product specifications since TI does not possess full access concerning the use or applica- tion of customers’ products. Texas Instruments also assumes no responsibility for customers’ product designs. When completed please return to: Texas Instruments Incorporated

34 Forest Street, MS 23-10

Attleboro, MA 02703-0964 Phone: 508-236-3800 Fax: 508-236-2349 Email: tisensors@ti.com or visit our website @: www.tisensors.com Sample Request Data Form (Please complete as much as possible) © 2002 Texas Instruments Incorporated Printed in U.S.A. 12-2002 MCFS007