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Grey rectangular manual motor starter with rotary knob on front face

SIEMENS

SIEMENS 3RV2031-4PA10 Manual Motor Starter 28-36A

SKU CH-AP9Q-HZ5SQ

Manual motor starter with rotary-knob operator protects three-phase circuits from 28 to 36 A up to 690 V AC

  • Manual motor protection up to 36 A
  • Three-pole switching for balanced three-phase loads
  • 690 V AC rating suits industrial power systems
  • Self-protected combination controller simplifies panel wiring
  • Compact 5.51 × 2.17 × 5.87 in footprint saves space

What this starter does

The SIEMENS 3RV2031-4PA10 is a manual motor starter rated for 28 to 36 amps AC and up to 690 volts AC. It protects three-phase motors up to 40 hp at 575 volts and single-phase motors up to 7.5 hp at 230 volts. Industrial maintenance teams use it as a self-protected combination motor controller.

Installing the unit

The starter measures 5.51 inches high, 2.17 inches wide and 5.87 inches deep with a rotary knob operator. It ships with no enclosure, so you must mount it inside a suitable panel or cabinet that meets local code. Wiring follows standard three-pole practice; the main mistake is forgetting to verify the overload dial matches the motor nameplate current.

The critical spec

The overload relay adjustment range is fixed at 28 to 36 amps; if your motor draws less than 28 amps or more than 36 amps full-load, this starter cannot protect it correctly.

How it compares

Measured against everything we stock in Contactors, Relays & Motor Starters, at today’s prices. Recalculated every night.

Price $246.99
Pricier than about 91% of the 1,098 comparable items (median $61.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

How do I confirm the 3RV2031-4PA10 is working correctly after wiring it to a 28-36A motor load?

With power applied, the rotary knob should stay in the ON position without tripping, the motor runs at its rated current, and the overload setting matches the motor full-load amps within the 28-36A range.

What ships with the SIEMENS 3RV2031-4PA10 and what must I source separately?

The starter unit itself is supplied; mounting hardware, enclosure, incoming and motor cables, and any required upstream short-circuit protection are not included.

Which overload setting should I select on the 3RV2031-4PA10 for my application?

Set the rotary dial to the motor’s exact full-load current between 28 and 36 amps; the starter covers the whole range in one unit so no separate version is needed.

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