{"product_id":"siemens-sirius-3ra28-function-modules","title":"Siemens SIRIUS 3RA28 Function Modules for 3RT2 Contactors","description":"\u003cp class=\"ps-intro\"\u003eSIRIUS 3RA28 function modules for mounting on 3RT20 contactors and 3RH2 relays for ON-delay, OFF-delay and star-delta starting.\u003c\/p\u003e\u003ch4 class=\"ps-h\"\u003eKey features\u003c\/h4\u003e\u003cul class=\"ps-feat\"\u003e\n\u003cli\u003eON-delay (two-wire) and OFF-delay with control signal, 0.05 to 100 s\u003c\/li\u003e\n\u003cli\u003eStar-delta function module set (basic + two coupling modules), 0.5 to 60 s\u003c\/li\u003e\n\u003cli\u003eVaristor integrated; automatic electrical connection when snapped on\u003c\/li\u003e\n\u003cli\u003eVersions for sizes S00\/S0 and S2\/S3\u003c\/li\u003e\n\u003cli\u003eSealable cover 3RA2910-0 available\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4 class=\"ps-h\"\u003eSpecifications\u003c\/h4\u003e\u003ctable class=\"ps-kv\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand line\u003c\/th\u003e\n\u003ctd\u003eSIRIUS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAccessory for\u003c\/th\u003e\n\u003ctd\u003eSIRIUS 3RT contactors \/ 3RH2 relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct category\u003c\/th\u003e\n\u003ctd\u003eAccessories\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCatalog chapter\u003c\/th\u003e\n\u003ctd\u003eContactors for switching motors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCatalog section\u003c\/th\u003e\n\u003ctd\u003e3RT\/3RH2 accessories: Modules for contactor control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSource\u003c\/th\u003e\n\u003ctd\u003eSiemens Catalog IC 10 · 2026, p. 226\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ctable class=\"ps-src\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2811-1CW10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: ON-delay, two-wire | For: 3RT201\/3RT202, 3RH21\/24 (S00\/S0) | Uc: 24-240 V AC\/DC | Time range: 0.05-100 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2811-2CW10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: ON-delay, two-wire | For: 3RT201\/3RT202, 3RH21\/24 (S00\/S0) | Uc: 24-240 V AC\/DC | Time range: 0.05-100 s | Connection: Spring-loaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2831-1DG10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: ON-delay, two-wire | For: 3RT203\/3RT204 (S2\/S3) | Uc: 24-90 V AC\/DC | Time range: 0.05-100 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2831-2DG10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: ON-delay, two-wire | For: 3RT203\/3RT204 (S2\/S3) | Uc: 24-90 V AC\/DC | Time range: 0.05-100 s | Connection: Spring-loaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2831-1DH10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: ON-delay, two-wire | For: 3RT203\/3RT204 (S2\/S3) | Uc: 90-240 V AC\/DC | Time range: 0.05-100 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2831-2DH10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: ON-delay, two-wire | For: 3RT203\/3RT204 (S2\/S3) | Uc: 90-240 V AC\/DC | Time range: 0.05-100 s | Connection: Spring-loaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2812-1DW10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: OFF-delay with control signal | For: 3RT201\/3RT202, 3RH21\/24 (S00\/S0) | Uc: 24-240 V AC\/DC | Time range: 0.05-100 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2812-2DW10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: OFF-delay with control signal | For: 3RT201\/3RT202, 3RH21\/24 (S00\/S0) | Uc: 24-240 V AC\/DC | Time range: 0.05-100 s | Connection: Spring-loaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2832-1DG10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: OFF-delay with control signal | For: 3RT203\/3RT204 (S2\/S3) | Uc: 24-90 V AC\/DC | Time range: 0.05-100 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2832-2DG10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: OFF-delay with control signal | For: 3RT203\/3RT204 (S2\/S3) | Uc: 24-90 V AC\/DC | Time range: 0.05-100 s | Connection: Spring-loaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2832-1DH10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: OFF-delay with control signal | For: 3RT203\/3RT204 (S2\/S3) | Uc: 90-240 V AC\/DC | Time range: 0.05-100 s | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2832-2DH10\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: OFF-delay with control signal | For: 3RT203\/3RT204 (S2\/S3) | Uc: 90-240 V AC\/DC | Time range: 0.05-100 s | Connection: Spring-loaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2816-0EW20\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: Star-delta (basic + 2 coupling mod.) | For: 3RT201-3RT204 (S00-S3) | Uc: 24-240 V AC\/DC | Time range: 0.5-60 s | Connection: Screw \/ spring-loaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3RA2910-0\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eFunction: Cover, sealable (accessory) | For: 3RA27\/3RA28 function modules | Uc: -- | Time range: -- | Connection: --\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":67534390559010,"sku":"3RA2811-1CW10","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1021\/0744\/7586\/files\/siemens-sirius-3ra28-function-modules.jpg?v=1792131831","url":"https:\/\/prosourcemro.com\/products\/siemens-sirius-3ra28-function-modules","provider":"ProSource MRO","version":"1.0","type":"link"}