Siemens 3RU1936-3AA01 Overload Relay Size S2

Product Description

The SIEMENS 3RU1936-3AA01 is a Size S2 overload relay designed for motor protection in industrial control circuits. Overload relays monitor motor current and trip the circuit when sustained overcurrent conditions threaten motor windings. This unit mounts as part of a contactor assembly, providing thermal or electronic overload protection in motor starter configurations. Licensed electricians and industrial controls technicians install this device as part of a complete motor control center or standalone starter panel. Its Size S2 frame suits mid-range motor starters and pairs with corresponding Size S2 contactors.

The 3RU1936-3AA01 is used in industrial and commercial motor control applications where overload protection is required for three-phase motors. It is suited for installation in motor control centers, starter panels, and machine control enclosures. This relay is typically specified in manufacturing, HVAC plant rooms, pump stations, and similar facilities requiring reliable motor overload protection at the Size S2 contactor frame level.

Key Features

• Size S2 frame for compatibility with mid-range contactor assemblies
• Provides motor overload protection to prevent winding damage from sustained overcurrent
• Direct mounting to corresponding Size S2 contactors for compact starter assemblies
• Compact form factor suited for panel and motor control center installation

Compatibility

Designed as an OEM-style overload relay for Size S2 motor starter and contactor assemblies in industrial control applications.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the NEC and applicable local codes. De-energize and lock out the panel or motor control center before mounting or wiring this relay. Verify that the contactor frame size matches Size S2 before assembly. Do not exceed the rated current setting range for the connected motor load.

Technical Specifications

• Frame Size: S2
• Package Weight: 0.388 pounds
• Dimensions (L x W x H): 4.803 x 2.402 x 4.882 inches
• UPC: 04089256812

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RU1936-3AA01