W O R L D L E A D E R I N S E N S I N G S O L U T I O N S 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- for 2.5 million cycles.† In applications such as split room air conditioning systems, the 46PS as a head pressure control can result in significant cost savings when used instead of a pilot duty switch and relay. 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. Operation Extended electrical capacities and life cycles, in both environmentally sealed and unsealed configurations, encourage usage in the most rigorous fan cycling and high/low pressure protection 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. The 46PS pressure switch is capable of breaking 2 amp loads at 480 Vac Product Selection Matrix Switch Life Cycles Application Voltage Environmental Package Model Number – Termination Sealed 44PS - Wire Leads Unsealed 44PS - 1/4” Quick Connects Sealed 44PS - Wire Leads Unsealed 42PS - Wire Leads or 1/4” Quick Connects Sealed 45PS - Wire Leads Unsealed 45PS - 1/4” Quick Connects Sealed 45PS - Wire Leads Unsealed 25PS - Wire Leads or 1/4” Quick Connects Sealed 46PS - Wire Leads Unsealed 46PS - Wire Leads or 1/4” Quick Connects Sealed 46PS - Wire Leads Unsealed 46PS - Wire Leads or 1/4” Quick Connects 480 - 600 Vac 250,000 28 Vdc - 240 Vac 480 - 600 Vac 100,000 28 Vdc - 240 Vac 480 Vac 2,500,000† 120 Vac - 240 Vac †Qualified by application current. Requires TI/customer specification closure and validation testing before application approval. Electrical Ratings 5-28 Vdc 240 Vac 120 Vac Device Switch Type** Amps Inductive Amps Res F L A L R A VA Pilot Duty Amps Res F L A L R A 25/42PS SPST NO 15 13 13 65 480 10 10 NC 15 25† 13 60 480 25† 25/42PS SPDT NO 15 10 15 25† 5.8 34.8 13 60 278 NC 480 44/45/46PS SPST NO 15 13 13 65 NC 15 25† 13 60 44/45PS SPDT NO 15 10 NC 15 25† 5.8 34.8 13 60 600 Vac 480 Vac VA Pilot Duty F L A L R A F L A L R A 45 720 – – – – 10 45 720 – – – – 5 2.9 17.4 278 – – – – 25† 10 45 720 – – – – 480 10 10 45 720 4 24 3.2 19.2 480 25† 10 45 720 4 24 3.2 19.2 278 5 2.9 17.4 278 – – – – 480 25† 10 45 720 – – – – Typical Dimensional Drawings – 25PS, 42PS, 44PS, 45PS, 46PS Leaded Construction Quick Connect Construction .122 1.27 .54 .54 1.16 1.50 2.00 1.06 .250 x .032 straight male spade terminal to mate with Amp #41800 female or equivalent All dimensions in inches. Design Specifications – 25PS, 42PS, 44PS, 45PS, 46PS Operating Pressure: Vacuum to 750 psig Burst Pressure: 5000 psig Life at rated Current: 100,000 Cycles (25/45PS) 250,000 Cycles (42/44PS) 2,500,000 Cycles (46PS)† Dielectric Strength: 750 Vrms across open contacts 1554 Vrms terminals to fitting (25/42PS) 2200 Vrms terminals to fitting (44/45/46PS) Standard Pressure Ranges Upper Setpoint*** Differential Minimum Tolerance Range∆ 10” Hg Min - 18 psig 50 - 70 Contact TI 15-50 psig 45 - 60 5 51-120 psig 50 - 70 7 121-250 psig 60 - 75 10 251-350 psig 60 - 75 10 351-500 psig 65 - 80 10 501-750 psig 70 - 80 15 Ambient Temperature: -20oF to 150oF / -28.9oC to 65.6oC (Leaded) -40oF to 275oF / -40oCto135oC (QuickConnect) Fluid Temperature: -65oF to 275oF / -53.9oC to 135oC Agency Approvals: UL Recognized File No. SA995 U.S.Guide No. SDFY2 / Canada No. SDFY8 PED CE0035 Module B/D ENEC Certified IP67 (Leaded) *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 Standard Fittings, others are available 1/4” Male Pipe Thread 1/8” Male Pipe Thread 1/4” Female Flare with Deflator 1/4-18 NPTF-1A 7/16-20 UNF-2B 1/8-27 NPTF-1A .09 (2.3) DIA. .26 (6.6) MIN. TH’D LG. .40 (10.2) MIN. TH’D. LG. .83 (21) .26 (6.6) MIN. TH’D LG. .63 (16) .36 (9.1) .53 (13.5) .27 (6.9) .27(6.9) .375 (9.5) 9/16 (14.3) HEX 9/16 (14.3) HEX 9/16 (14.3) HEX Capillary Tube Fitting (3 Configurations) Tube Fitting (4 Configurations) Female O-Ring A .093 DIA. (2.4) (2.5±0.05) (2.7±0.07) (4.4±0.13) .098±.002 DIA. .105±.003 DIA. .172±.005 DIA. A .234-.238 (6) .9 MIN. (22.9) .125 (3.2) .093 DIA. (2.4) .56 DIA. (14.3) .370±.010 (9.4±0.3) M10 X 1.25 Female O-ring .080/.100 DIA. (2.03/2.54) B .093 DIA. .250 DIA. (6.4) (2.4) 1.27±.02 (32.3±0.51) .4245/.4193 DIA. (10.782/10.650) C .205±.010 (5.2±0.3) .145±.010 (3.7±0.25) C .250 DIA. (6.4) .417/.402 (10.59/10.21) .496 (12.6) MIN. FULL TH’D .140±.010 (3.5±0.3) .77/.73 (19.6/18.5) .250 (6.4) .9 MIN. (22.9) .275±.002 (7±0.05) 2.074±.030 (52.68±0.76) .197 DIA. (5) .250 DIA. (6.4) B D Complete Product Directory of Texas Instruments Hermetic Pressure Switches Model Switch Operation Switch Configuration Application Voltage 36PS 40PS 20PS Auto Reset Auto Reset Auto reset SPST SPST SPST 5-28 Vdc 5-28 Vdc 5-28 Vdc Electrical Current Switch Life Cycles (K) Features DC Voltage (<28V), Low Current 5-400 mA 5-400 mA 5-400 mA 1,000 >250 >100 Narrow differential, tight tolerance Dry circuit capability, extended life cycle Dry circuit capability, extended life cycle DC Voltage (<28V), High Current 36PS 39PS 41PS 25PS 42PS 44PS 45PS Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset SPST SPST SPST SPST, SPDT SPST, SPDT SPST, SPDT SPST, SPDT 5-28 Vdc 5-28 Vdc 5-28 Vdc 28 Vdc 28 Vdc 28 Vdc 28 Vdc SPST SPST SPST SPST 120/240 Vac 120/240 Vac 120/240 Vac 240 Vac 400 mA-2 A 400 mA-2 A 400 mA-2 A 15 A 15 A 15 A 15 A 250 250 250 100 250 250 100 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 AC Voltage (<240V), Low Current 20PS Auto Reset 29PS Manual Reset 36PS Auto Reset PS80 Auto Reset 5.8/2.9 A 6.0/2.9 A 5.8/2.9 A 6.0 A 100 10 100 100 High current loads Trip free manual reset Narrow differential, tight tolerance Small, lightweight AC Voltage (<240V), High Current 25PS 42PS 44PS 45PS 46PS Auto Reset Auto Reset Auto Reset Auto Reset Auto Reset SPST, SPDT† SPST, SPDT SPST, SPDT† SPST, SPDT† SPST, SPDT† 120/240 Vac 120/240 Vac 120/240 Vac 120/240 Vac 120/240 Vac 44PS 45PS 46PS Auto Reset Auto Reset Auto Reset SPST SPST SPST 480/600 Vac 480/600 Vac 480 Vac 13/10 A 13/10 A 13/10 A 13/10 A 13/10 A 100 250 250 100 1,000+ High current loads Extended life cycles Extended life cycles, sealed configuration High current in sealed configuration Extended cycle life† High AV Voltage (<600V), High Current †Normally open contact on double throw switch is rated 5.8/2.9 Amps. Contact Marketing for additional product information. 4.0/3.2 A 4.0/3.2 A 2A 250 100 1,000+ Extended cycle life at high voltage High voltage capability Extended cycle life† Sample Request Data Form (Please complete as much as possible) Company Name and Address Contact Phone Fax Email Description of Application Exact Function of Switch in System Cut In Pressure Tolerance Pressure Port Fitting Cut Out Pressure Tolerance 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 Cycle Life Requirement Inductive / Resistive 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 application 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: [email protected] or visit our website @: www.tisensors.com © 2002 Texas Instruments Incorporated Printed in U.S.A. 12-2002 MCFS007