Siemens 3RB2036-1QB0 Overload Relay for 3-Phase Motors, 6-25A Adjustable

Siemens 3RB2036-1QB0 Overload Relay for 3-Phase Motors, 6-25A Adjustable

Not sure which overload relay protects your motor starter? The Siemens 3RB2036-1QB0 is a solid-state overload relay built to guard three-phase motors against overloading, phase loss, and current imbalance on standard 50/60 Hz power. It adjusts across a 6 to 25 A range, so one relay can be dialed in to match your motor's actual full-load amperage.

This relay is designed to mount directly onto a Siemens SIRIUS S2 contactor (3RT1033, 3RT1034, 3RT1035, or 3RT1036), keeping your starter assembly compact and simple to wire, with screw terminals on the main and auxiliary circuits.

Common Applications

• Protecting three-phase motors from overload on 50/60 Hz power systems
• Catching phase failure and phase imbalance conditions before they damage a motor
• Building a compact motor starter with a SIRIUS S2 contactor (3RT1033 through 3RT1036)

Key Features

• Wide Adjustment Range: Set anywhere from 6 to 25 A to match your motor's nameplate current.
• Choice of Reset: Pick manual or automatic reset depending on how you want the relay to behave after a trip.
• Easy Status Check: A built-in switch position indicator shows you whether the relay has tripped.
• Built-In Test Function: Self-monitoring and a TEST function let you confirm the relay is working properly.

Specifications

• Manufacturer: Siemens
• Part Number: 3RB2036-1QB0
• Product Line: SIRIUS 3RB20 solid-state overload relay
• Current Setting Range: 6 to 25 A, adjustable
• Trip Class: Class 10
• Size: S2
• Poles: 3 (main circuit)
• Mounting: Direct contactor mounting, any position
• Terminal Type: Screw terminals, main and auxiliary circuits
• Auxiliary Contacts: 1 NO plus 1 NC
• Rated Insulation Voltage: 690 V AC, pollution degree 3
• Degree of Protection: IP20 (front)
• Operating Ambient Temperature: -25 C to +60 C
• Reset Type: Manual or automatic
• Standards: IEC 60947-4-1; ATEX type of protection PTB 06 ATEX 3001 Ex II (2) GD

Product Identification

• Product Dimensions: 3.62 in H x 2.17 in W x 4.29 in D (92 mm x 55 mm x 109 mm)

FAQ

• What does the 6 to 25 A range mean? You can adjust the relay's trip setting anywhere within that range to match your motor's full-load current.
• Which contactors can I pair this with? Siemens SIRIUS S2 contactors 3RT1033, 3RT1034, 3RT1035, and 3RT1036.
• What is Class 10? It is the relay's trip class, meaning it trips in 10 seconds or less under a stall condition per that classification.
• Does this relay have extra contacts for signaling? Yes, it includes 1 NO plus 1 NC auxiliary contact.