Siemens Sirius motor starter combination consisting of a 3RT1044-1AP00 power contactor and 3RU1146-4MB0 thermal overload relay (80–100 A range), in good working used condition as removed from service.
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Brand: Siemens
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Series: Sirius 3RT / 3RU
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Contactor model: 3RT1044-1AP00, size S3, 3‑pole, 3NO main contacts
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Contactor coil: 230 V AC, 50 Hz (AP00 version)
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Contactor ratings (AC‑3): 65 A, 30 kW at 400 V; 45 kW at 690 V
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Contactor ratings (AC‑1): up to 90 A at 400 V
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Overload relay model: 3RU1146-4MB0, size S3, Class 10, direct‑mount on 3RT1044
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Overload current range: 80…100 A adjustable (dial on front)
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Auxiliary contacts (relay): 1 NC + 1 NO (95‑96 / 97‑98 terminals)
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Protection class: Motor protection to IEC/EN 60947‑4‑1, trip class 10
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Country of manufacture: Made in Germany (labels on rear)
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Used, good working motor starter set.
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Cosmetic signs of use: surface marks, label writing (e.g. “KM1” and “F20”), and light discoloration from panel service; terminals show typical installation marks but no apparent overheating or damage.
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Contactor and overload both operate mechanically as expected; no broken parts observed in the photos.
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Supplied as a complete assembled starter: 3RT1044‑1AP00 contactor pre‑mounted on 3RU1146‑4MB0 overload relay, ready for panel mounting and wiring by qualified personnel.
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Suitable for protecting and switching three‑phase motors in the 30 kW / 80–100 A range at 400 V, when coordinated with appropriate upstream fuses or breakers according to Siemens data.
