Catalog 1308242 Issued 3-03 (PDF Rev. 3-09) 491 series AC Coil 20 Amp PC Board or Panel Mount Relay File E38802 File LR75282 THIS DATA IS FOR REFERENCE PURPOSES ONLY Users should thoroughly review the technical data before selecting a product part number. It is recommended that user also seek out the pertinent approvals This product's status is: PENDING OBSOLESCENCE. files of the agencies/laboratories and review them to ensure the product meets the requirements for a given application. The 491 Series should not be designed into new applications. Coil Data Features Nominal DC Resistance Must Operate Must Release • Up to 20 amp switching in SPST-NO and 13.3 amp in SPDT arrange- Voltage ± 10% (Ohms) Voltage (Max.) Voltage (Min.) ments. • Washable, plastic sealed case available. 12 26 10.2 1.8 24 106 20.4 3.6 • Meets UL 873 and UL 508 spacing – 1/8" through air, 1/4" over surface. 110 2,750 93.5 16 • Load connections made via 1/4" Q. C. terminals. 220 11,000 187 33 • Choice of UL Class B or F insulation system. • Well suited for various industrial, commercial and residential applications. Operate Data @ 25°C Contact Ratings @ 23°C Must Operate Voltage: 85% of nominal voltage or less. Arrangements: 1 Form A (SPST-NO), 1 Form B (SPST-NC) and 1 Form C Must Release Voltage: 15% of nominal voltage or more. (SPDT). Operate Time (Including Bounce)§: 20 ms, max. Material: Silver-cadmium oxide. Release Time (Including Bounce)§: 15 ms, max. Mechanical Life: 10 million operations, at 300 ops/minute. § At or From Nominal Coil Voltage Electrical Life: 100,000 operations at factory rated load, 6 ops/minute. Minimum Contact Load: 1A @ 5VDC or 12VAC. Initial Contact Resistance: 50 milliohms @ 100mA, 6VDC). Environmental Data Storage Temperature Range: -40°C to 130°C. (1) Contact Ratings @ 23°C with relay properly vented. Remove tape Operating Temperature Range : -55°C to +85°C. Vibration, Operational: 0.065" (1.5mm) max. excursions from 10-55 Hz. from vent hole after soldering and cleaning. Shock, Operational: 10g for 11 ms. Shock, Mechanical: 100g. Factory Contact Ratings Voltage 1 Form A 1 Form B 1 Form C (NO) (NC) Mechanical Data 240VAC 20A 10A 13.3A 6.7A (4) Termination: Printed circuit and quick connect terminals . 28VDC 20A 6.7A 13.3A 6.7A Enclosures (all have 94V-0 flammability rating): Open, unsealed dust cover or sealed case. Weight: 1.2 oz. (33g) approx. UL/CSA Contact Ratings Voltage Load Type 1 Form A 1 Form B 1 Form C (NO) (NC) Coil Temperature Rise 240VAC General Purpose 30A 15A 20A 10A 240VAC Resistive * 30A 15A 20A 10A 240VAC Motor 2 HP 1/2 HP 2 HP 1/2 HP 120VAC Motor 1 HP 1/4 HP 1 HP 1/4 HP 240VAC LRA/FLA ** 80/30 30/10 50/20 20/7 120VAC LRA/FLA 98/22 – – – 120VAC Tungsten * TV5 TV3 TV5 TV3 277VAC Ballast 10A 3A 10A 3A 28VDC Resistive 20A 10A 20A 10A Initial Dielectric Strength Between Open Contacts: 1,500V rms, 1 minute. Between Contacts and Coil: 1,500V rms, 1 minute. Initial Insulation Resistance 9 Notes Between Mutually Insulated Elements: 10 ohms, min., @ 500VDC, 23°C and 50% R.H. (1) Operating ambient temperature must consider must operate voltage change over temperature, contact temperature rise, coil temperature rise (If coil is not allowed to cool) and maximum coil temperature. Coil Data @ 23°C (2) Sealed relay terminals should not be bent. (3) Remove tape after cleaning process for optimum life of sealed relays. Voltage: 12 to 220VAC. (4) Class B coils are UL systems approved for maximum coil temperature of Nominal Coil Power: 2.0VA, (approx.). (4) 130°C, by change of resistance method. Class F coils are UL systems ap- Maximum Coil Temperature : Class B: 130°C. proved for maximum coil temperature of 155°C, by change of resistance Class F: 155°C. method. Duty Cycle: Continuous. Dimensions are shown for refer- Dimensions are in inches over Specifications and availability www.tycoelectronics.com ence purposes only. (millimeters) unless otherwise subject to change. Technical support: 509 specified. Refer to inside back cover. Catalog 1308242 Issued 3-03 (PDF Rev. 3-09) Ordering Information Typical Part Number B 491 -1 1 G 2 00 1. Basic Series: 491 = AC coil, printed circuit board/panel power relay. 2. Enclosure & Terminals: 1 = Dust Cover, PC terminal. 7 = Sealed Case, Panel Mount, .187 Coil Terminal. 2 = Sealed Case, PC terminal. 8 = Open Unit 6 = Sealed Case, Panel Mount, .110 Coil Terminal. 3. Contact Arrangement: 1 = 1 Form C (SPDT) 4 = 1 Form A (SPST-NO) 5 = 1 Form B (SPST-NC) 4. Coil Input: P = 12VAC Q = 24VAC T = 120VAC U = 220VAC 5. Contacts: 2 = Silver-cadmium oxide 6. Coil Insulation and Special Features: 00 = Standard, UL Class B Coil Insulation System F0 = Special, UL Class F Coil Insulation System A1 - E9 = Special - Customer Specific Features Our authorized distributors are more likely to maintain the following items in stock for immediate delivery. 491-21T200 491-24T200 491-61T200 491-64T200 491-61Q200 491-64Q200 491-21Q200 491-24Q200 Outline Dimensions .9213 – .25 QC1.22Open Style (23.4) (6.35) (31.1) 3 – .047 (1.2) .3.403 (7.7) (10.24) 1.18 MAX..7 (30 MAX.) (17.8) .9 (22.9) 2 – .024 DIA. .11.15.4.21.63(.6) (2.8) (3.8) (10.2) (16.2) (5.4) PC Board Layout (Bottom View) Sealed Case for .11.11 PC Board Mounting 1.08 MAX.(2.8) 3 – .08 DIA. (2.8) 3 – .08 DIA. 1.10 MAX..138(2) (27.5) (2.0) (28) (3.5) .3.30 (7.7) (7.62) 1.26 MAX..6 .62 – .04 DIA. 2 – .04 DIA. (32.5) (15.24) (2.54) (1) .1 (1.0) (2.54) .15 .24 .25 QC(3.81) .55 Reference Only (6.1) (6.35) (13.97) .55.7.7 (17.8) .24 (17.8) (17.8) (6.1) Mounting Hole Pattern Sealed Case for 1.08 MAX.2 – 0.12 (3.2) DIA. or M3 1.10 MAX. (27.5 MAX.) (28 MAX.) Panel Mounting THIS DATA IS FOR REFERENCE PURPOSES ONLY 1.71 (43.5) 1.71 .25 QCThis product's status is: (43.5) (6.35) PENDING OBSOLESCENCE. 1.99 MAX.1.28 MAX. (50.3 MAX.) (32.5 MAX.) The 491 Series should not be designed into new applications. .11 QC (2.8) Disclaimer Wiring Diagrams (Bottom Views) While Tyco Electronics has made every reasonable effort to ensure the accuracy of the informa- tion in this document, Tyco Electronics does not guarantee that it is error-free, nor does Tyco 1 Form A 1 Form B 1 Form C Electronics make any other representation, warranty or guarantee that the information is accurate, correct, reliable or current. Tyco Electronics reserves the right to make any adjustments to the information contained herein at any time without notice. Tyco Electronics expressly disclaims all implied warranties regarding the information contained herein, including, but not limited to, any implied warranties of merchant- ability or fitness for a particular purpose. The dimensions in this catalog are for reference purposes only and are subject to change without notice. Specifications are subject to change without notice. Consult Tyco Electronics for the latest dimensions and design specifications. Dimensions are shown for refer- Dimensions are in inches over Specifications and availability www.tycoelectronics.com ence purposes only. (millimeters) unless otherwise subject to change. Technical support: 510 specified. Refer to inside back cover.