Siemens 3RV1021-1JA10 Manual Motor Starter Protector

The Siemens 3RV1021-1JA10 Manual Motor Starter Protector is a SIRIUS 3RV1 motor starter protector designed to provide reliable motor protection within control panels, combining manual starting capability with a built‑in overload protection function. It is intended for use in motor circuits to safeguard small to mid‑range motors from overload conditions, enabling controlled starting and stopping as part of a manual motor controller or protective assembly. This model belongs to Siemens’ 3RV1 MSP lineup, with variant-specific electrical ratings and release characteristics that define its exact current and trip behavior. For precise specifications, terminal configurations, and installation details, consult Siemens documentation for the 3RV1021-1JA10 and related 3RV1 motor starter protectors, noting that parameters vary between variants.