3RT20281AU60

Data sheet 3RT2028-1AU60 Power contactor, AC-3 38 A, 18.5 kW / 400 V 1 NO + 1 NC, 277 V AC 60Hz, 3-pole, size S0 screw terminals product brand name SIRIUS product designation Power contactor product type designation 3RT2 General technical data size of contactor S0 product extension ● function module for communication No ● auxiliary switch Yes power loss [W] for rated value of the current at AC in hot operating state ● per pole power loss [W] for rated value of the current without load current share typical 11.4 W 3.8 W 9.4 W surge voltage resistance ● of main circuit rated value 6 kV ● of auxiliary circuit rated value 6 kV maximum permissible voltage for safe isolation between coil and main contacts acc. to EN 60947-1 400 V shock resistance at rectangular impulse ● at AC 8,3g / 5 ms, 5,3g / 10 ms shock resistance with sine pulse ● at AC 13,5g / 5 ms, 8,3g / 10 ms mechanical service life (switching cycles) ● of contactor typical 10 000 000 ● of the contactor with added electronically optimized auxiliary switch block typical 5 000 000 ● of the contactor with added auxiliary switch block typical 10 000 000 reference code acc. to IEC 81346-2 Q Substance Prohibitance (Date) 01.10.2009 00:00:00 Ambient conditions installation altitude at height above sea level maximum 2 000 m ● ambient temperature during operation -25 ... +60 °C ● ambient temperature during storage -55 ... +80 °C Main circuit number of poles for main current circuit 3 number of NO contacts for main contacts 3 ● operating voltage at AC-3 rated value maximum 3RT20281AU60 Page 1/2 690 V 1.21.2021 Subject to change without notice © Copyright Siemens operational current ● at AC-1 at 400 V at ambient temperature 40 °C rated value 50 A ● at AC-1 — up to 690 V at ambient temperature 40 °C rated value 50 A — up to 690 V at ambient temperature 60 °C rated value 42 A ● at AC-3 — at 400 V rated value 38 A — at 500 V rated value 32 A — at 690 V rated value 21 A ● at AC-4 at 400 V rated value 22 A ● at AC-5a up to 690 V rated value 44 A ● at AC-5b up to 400 V rated value 31.5 A ● at AC-6a — up to 230 V for current peak value n=20 rated value 30.8 A — up to 400 V for current peak value n=20 rated value 30.8 A — up to 500 V for current peak value n=20 rated value 30.8 A — up to 690 V for current peak value n=20 rated value 21 A ● at AC-6a — up to 230 V for current peak value n=30 rated value 20.5 A — up to 400 V for current peak value n=30 rated value 20.5 A — up to 500 V for current peak value n=30 rated value 21.4 A — up to 690 V for current peak value n=30 rated value 21 A minimum cross-section in main circuit at maximum AC-1 rated value 10 mm² operational current for approx. 200000 operating cycles at AC-4 ● at 400 V rated value 12 A ● at 690 V rated value 12 A operational current ● at 1 current path at DC-1 — at 24 V rated value 35 A — at 110 V rated value 4.5 A — at 220 V rated value 1A — at 440 V rated value 0.4 A — at 600 V rated value 0.25 A ● with 2 current paths in series at DC-1 — at 24 V rated value 35 A — at 110 V rated value 35 A — at 220 V rated value 5A — at 440 V rated value 1A — at 600 V rated value 0.8 A ● with 3 current paths in series at DC-1 — at 24 V rated value 35 A — at 110 V rated value 35 A — at 220 V rated value 35 A — at 440 V rated value 2.9 A — at 600 V rated value 1.4 A operational current ● at 1 current path at DC-3 at DC-5 — at 24 V rated value 3RT20281AU60 Page 2/3 20 A 1.21.2021 Subject to change without notice © Copyright Siemens — at 110 V rated value 2.5 A — at 220 V rated value 1A — at 440 V rated value 0.09 A — at 600 V rated value 0.06 A ● with 2 current paths in series at DC-3 at DC-5 — at 24 V rated value 35 A — at 110 V rated value 15 A — at 220 V rated value 3A — at 440 V rated value 0.27 A — at 600 V rated value 0.16 A ● with 3 current paths in series at DC-3 at DC-5 — at 24 V rated value 35 A — at 110 V rated value 35 A — at 220 V rated value 10 A — at 440 V rated value 0.6 A — at 600 V rated value 0.6 A operating power ● at AC-2 at 400 V rated value 18.5 kW ● at AC-3 — at 230 V rated value 11 kW — at 400 V rated value 18.5 kW — at 500 V rated value 18.5 kW — at 690 V rated value 18.5 kW operating power for approx. 200000 operating cycles at AC-4 ● at 400 V rated value 6 kW ● at 690 V rated value 10.3 kW operating apparent power at AC-6a ● up to 230 V for current peak value n=20 rated value 12.2 kV·A ● up to 400 V for current peak value n=20 rated value 21.3 kV·A ● up to 500 V for current peak value n=20 rated value 26.6 kV·A ● up to 690 V for current peak value n=20 rated value 25 kV·A operating apparent power at AC-6a ● up to 230 V for current peak value n=30 rated value 8.1 kV·A ● up to 400 V for current peak value n=30 rated value 14.2 kV·A ● up to 500 V for current peak value n=30 rated value 18.5 kV·A ● up to 690 V for current peak value n=30 rated value 25 kV·A short-time withstand current in cold operating state up to 40 °C ● limited to 1 s switching at zero current maximum 593 A; Use minimum cross-section acc. to AC-1 rated value ● limited to 5 s switching at zero current maximum 395 A; Use minimum cross-section acc. to AC-1 rated value ● limited to 10 s switching at zero current maximum 260 A; Use minimum cross-section acc. to AC-1 rated value ● limited to 30 s switching at zero current maximum 186 A; Use minimum cross-section acc. to AC-1 rated value ● limited to 60 s switching at zero current maximum 152 A; Use minimum cross-section acc. to AC-1 rated value no-load switching frequency ● at AC 5 000 1/h operating frequency ● at AC-1 maximum 1 000 1/h ● at AC-2 maximum 750 1/h ● at AC-3 maximum 750 1/h ● at AC-4 maximum 250 1/h Control circuit/ Control type of voltage of the control supply voltage AC control supply voltage at AC ● at 60 Hz rated value 277 V operating range factor control supply voltage rated value of magnet coil at AC ● at 50 Hz 0.8 ... 1.1 ● at 60 Hz 0.85 ... 1.1 3RT20281AU60 Page 3/4 1.21.2021 Subject to change without notice © Copyright Siemens apparent pick-up power of magnet coil at AC ● at 60 Hz 87 V·A inductive power factor with closing power of the coil ● at 60 Hz 0.76 apparent holding power of magnet coil at AC ● at 60 Hz 9.4 V·A inductive power factor with the holding power of the coil ● at 60 Hz 0.28 closing delay ● at AC 8 ... 40 ms opening delay ● at AC 4 ... 16 ms arcing time 10 ... 10 ms control version of the switch operating mechanism Standard A1 - A2 Auxiliary circuit number of NC contacts for auxiliary contacts instantaneous contact 1 number of NO contacts for auxiliary contacts instantaneous contact 1 operational current at AC-12 maximum 10 A operational current at AC-15 ● at 230 V rated value 10 A ● at 400 V rated value 3A ● at 500 V rated value 2A ● at 690 V rated value 1A operational current at DC-12 ● at 24 V rated value 10 A ● at 48 V rated value 6A ● at 60 V rated value 6A ● at 110 V rated value 3A ● at 125 V rated value 2A ● at 220 V rated value 1A ● at 600 V rated value 0.15 A operational current at DC-13 ● at 24 V rated value 10 A ● at 48 V rated value 2A ● at 60 V rated value 2A ● at 110 V rated value 1A ● at 125 V rated value 0.9 A ● at 220 V rated value 0.3 A ● at 600 V rated value 0.1 A contact reliability of auxiliary contacts 1 faulty switching per 100 million (17 V, 1 mA) UL/CSA ratings full-load current (FLA) for 3-phase AC motor ● at 480 V rated value 34 A ● at 600 V rated value 27 A yielded mechanical performance [hp] ● for single-phase AC motor — at 110/120 V rated value 3 hp — at 230 V rated value 5 hp ● for 3-phase AC motor — at 200/208 V rated value 10 hp — at 220/230 V rated value 10 hp — at 460/480 V rated value 25 hp — at 575/600 V rated value 25 hp contact rating of auxiliary contacts according to UL A600 / P600 Short-circuit protection design of the fuse link 3RT20281AU60 Page 4/5 1.21.2021 Subject to change without notice © Copyright Siemens ● for short-circuit protection of the main circuit — with type of coordination 1 required gG: 125A (690V,100kA), aM: 50A (690V,100kA), BS88: 125A (415V,80kA) — with type of assignment 2 required gG: 50A (690V,100kA), aM: 25A (690V, 100kA), BS88: 50A (415V, 80kA) ● for short-circuit protection of the auxiliary switch required gG: 10 A (500 V, 1 kA) Installation/ mounting/ dimensions mounting position +/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface fastening method screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715 ● side-by-side mounting Yes height 85 mm width 45 mm depth 97 mm required spacing ● with side-by-side mounting — forwards 10 mm — upwards 10 mm — downwards 10 mm — at the side 0 mm ● for grounded parts — forwards 10 mm — upwards 10 mm — at the side 6 mm — downwards 10 mm ● for live parts — forwards 10 mm — upwards 10 mm — downwards 10 mm — at the side 6 mm Connections/ Terminals type of electrical connection ● for main current circuit screw-type terminals ● for auxiliary and control circuit screw-type terminals ● at contactor for auxiliary contacts Screw-type terminals ● of magnet coil Screw-type terminals type of connectable conductor cross-sections ● for main contacts — solid 2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²) — solid or stranded 2x (1 ... 2,5 mm²), 2x (2,5 ... 10 mm²) — finely stranded with core end processing 2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm² ● at AWG cables for main contacts 2x (16 ... 12), 2x (14 ... 8) connectable conductor cross-section for main contacts ● solid 1 ... 10 mm² ● stranded 1 ... 10 mm² ● finely stranded with core end processing 1 ... 10 mm² connectable conductor cross-section for auxiliary contacts ● solid or stranded 0.5 ... 2.5 mm² ● finely stranded with core end processing 0.5 ... 2.5 mm² type of connectable conductor cross-sections ● for auxiliary contacts — solid or stranded 2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²) — finely stranded with core end processing 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) ● at AWG cables for auxiliary contacts 2x (20 ... 16), 2x (18 ... 14) ● AWG number as coded connectable conductor cross section for main contacts 16 ... 8 3RT20281AU60 Page 5/6 1.21.2021 Subject to change without notice © Copyright Siemens ● AWG number as coded connectable conductor cross section for auxiliary contacts 20 ... 14 Safety related data B10 value with high demand rate acc. to SN 31920 1 000 000 proportion of dangerous failures ● with low demand rate acc. to SN 31920 40 % ● with high demand rate acc. to SN 31920 73 % failure rate [FIT] with low demand rate acc. to SN 31920 100 FIT product function ● mirror contact acc. to IEC 60947-4-1 Yes T1 value for proof test interval or service life acc. to IEC 61508 20 y protection class IP on the front acc. to IEC 60529 IP20 touch protection on the front acc. to IEC 60529 finger-safe, for vertical contact from the front suitability for use safety-related switching OFF Yes Certificates/ approvals General Product Approval EMC KC Declaration of Conformity Miscellaneous Test Certificates Special Test Certificate Marine / Shipping Type Test Certificates/Test Report Marine / Shipping other Confirmation Further information Information- and Downloadcenter (Catalogs, Brochures,…) https://www.siemens.com/ic10 Industry Mall (Online ordering system) https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=3RT2028-1AU60 Cax online generator http://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RT2028-1AU60 Service&Support (Manuals, Certificates, Characteristics, FAQs,...) https://support.industry.siemens.com/cs/ww/en/ps/3RT2028-1AU60 Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...) http://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RT2028-1AU60&lang=en Characteristic: Tripping characteristics, I²t, Let-through current https://support.industry.siemens.com/cs/ww/en/ps/3RT2028-1AU60/char Further characteristics (e.g. electrical endurance, switching frequency) http://www.automation.siemens.com/bilddb/index.aspx?view=Search&mlfb=3RT2028-1AU60&objecttype=14&gridview=view1 3RT20281AU60 Page 6/7 1.21.2021 Subject to change without notice © Copyright Siemens 3RT20281AU60 Page 7/8 1.21.2021 Subject to change without notice © Copyright Siemens 3RT20281AU60 Page 8/9 1.21.2021 Subject to change without notice © Copyright Siemens last modified: 1/6/2021 3RT20281AU60 Page 9/9 1.21.2021 Subject to change without notice © Copyright Siemens