{"product_id":"3rw4055-6bb44-siemens-sirius-soft-starter-industrial-motor-controller","title":"3RW4055-6BB44 Siemens SIRIUS Soft Starter Industrial Motor Controller","description":"\u003ch2\u003e\u003cstrong\u003eSiemens 3RW4055-6BB44 SIRIUS Soft Starter Technical Overview\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong style=\"color: #0000ff;\"\u003eSiemens 3RW4055-6BB44\u003c\/strong\u003e operates at a rated voltage of 200 to 460 V AC. It supports a frequency range of 50 to 60 Hz. The device draws a rated operating current of 134 A at 40 °C.\u003c\/li\u003e\n\u003cli\u003eAt 50 °C ambient temperature, the operating current rating drops to 117 A. At 60 °C, it provides 100 A continuously. This derating characteristic ensures stable performance in warm conditions.\u003c\/li\u003e\n\u003cli\u003eFor a 400 V motor, the \u003cstrong\u003e3RW4055-6BB44\u003c\/strong\u003e delivers 75 kW of mechanical power. At 230 V, it provides 37 kW. The UL rating shows 40 hp at 220\/230 V and 75 hp at 460\/480 V.\u003c\/li\u003e\n\u003cli\u003eThe control supply voltage is 230 V AC at both 50 Hz and 60 Hz. It tolerates a -15% to +10% voltage variation. The control electronics use screw-type terminals for secure wiring.\u003c\/li\u003e\n\u003cli\u003eThis soft starter measures 250 mm in depth, 120 mm in width, and 198 mm in height. Its size class is S6. You must mount it with screws on a vertical surface.\u003c\/li\u003e\n\u003cli\u003eInstallation requires 100 mm free space above the device. Leave 75 mm below and 5 mm on each side for proper cooling. The maximum cable length reaches 300 meters.\u003c\/li\u003e\n\u003cli\u003eThe main circuit uses box terminals for busbar or cable connections. You can connect finely stranded wires from 16 to 70 mm². AWG conductors from 6 to 2\/0 are also compatible.\u003c\/li\u003e\n\u003cli\u003eAuxiliary contacts include two NO contacts and one CO contact. They use screw terminals for solid or finely stranded wires (0.5 to 2.5 mm²). The device has no NC contacts.\u003c\/li\u003e\n\u003cli\u003eThe operating temperature ranges from -25 °C to +60 °C. Storage temperature tolerates -40 °C to +80 °C. Protection class is IP00, so you need an external enclosure.\u003c\/li\u003e\n\u003cli\u003eActive power loss at 40 °C operating current is typically 60 W. The continuous operating current capacity reaches 115% of Ie. Minimum motor load is 20% of the rated current.\u003c\/li\u003e\n\u003cli\u003eYou can reset the device externally after a fault. A red LED shows fault signals clearly. The unit does not support thermistor motor protection or inside-delta circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Do you have this soft starter in stock?\u003c\/strong\u003e\u003cbr\u003eA: Yes, we maintain local stock of the \u003cstrong\u003e3RW4055-6BB44\u003c\/strong\u003e. Most orders ship within 5 business days after payment confirmation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Which shipping carriers do you use?\u003c\/strong\u003e\u003cbr\u003eA: We ship via FedEx, UPS, and DHL. You can choose your preferred carrier at checkout. All shipments include tracking numbers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the return policy for this product?\u003c\/strong\u003e\u003cbr\u003eA: We support returns within 30 days of delivery. The \u003cstrong\u003e3RW4055-6BB44\u003c\/strong\u003e must remain unused and in original packaging. Contact us before returning any item.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Can I use this soft starter for a 460 V motor?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the \u003cstrong\u003e3RW4055-6BB44\u003c\/strong\u003e operates at 200-460 V AC. At 460\/480 V, it delivers 75 hp as per UL ratings. Check your motor's full load current first.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Does the device require an external bypass contactor?\u003c\/strong\u003e\u003cbr\u003eA: No, the \u003cstrong\u003e3RW4055-6BB44\u003c\/strong\u003e has an integrated bypass contact system. This feature reduces heat and saves energy during continuous running.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEmail: \u003ca href=\"mailto:sales@nex-auto.com\"\u003esales@nex-auto.com\u003c\/a\u003e\u003cbr\u003eWhatsApp: \u003ca href=\"https:\/\/wa.me\/8615392429628\"\u003e+86 153 9242 9628\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003ePartner: \u003ca href=\"https:\/\/www.nex-auto.com\/\"\u003eNexAuto Technology Limited\u003c\/a\u003e\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":45876798783649,"sku":"6EP1334-3BA00","price":253.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0673\/5390\/3265\/files\/3RW4055-6BB44-1.jpg?v=1774946193","url":"https:\/\/www.autonexcontrol.com\/sk\/products\/3rw4055-6bb44-siemens-sirius-soft-starter-industrial-motor-controller","provider":"AutoNex Controls Limited ","version":"1.0","type":"link"}