Siemens SIRIUS 3RB3 Electronic Overload Relay 1.25–10A

Siemens Sirius 3RB3 Electronic Overload Relay — Motor Protection for Saudi Industrial Applications

The Siemens Sirius 3RB3 electronic overload relay provides Class 10/20 adjustable motor protection from 1.25A to 10A — covering the majority of small to medium motors in Saudi industrial applications. Unlike thermal overload relays, the 3RB3 electronic design provides consistent trip times regardless of ambient temperature — critical for Saudi plants where panel temperatures regularly exceed 50C in summer.

Key Features

Class 10/20 Selectable: DIP switch selectable trip class — Class 10 for standard applications, Class 20 for high-inertia loads like large fans and centrifugal pumps.

Direct Mount: Clicks onto 3RT2 contactor side — no additional mounting hardware or wiring harness required.

Manual Reset with Trip Indicator: Visible overload trip indicator from panel door without opening enclosure.

Applications

Jubail Petrochemical MCCs: 3RB3 relays protect pump motors and agitator drives in Jubail polymerization plants.

Dammam Water Injection: Phase failure protection prevents single-phasing damage to high-pressure water injection pumps.

Technical Specifications

Frequently Asked Questions

Q1: Price of 3RB3026-1BB0 in Saudi Arabia? Contact RAZZ at sales@razz.sa. In stock Jeddah, 3–5 business day delivery.

Q2: Does 3RB3 require external power supply? No — the 3RB3 derives power from the 3RT2 contactor coil circuit. No separate power supply needed.