Siemens 3RH2140-1A SIRIUS Contactor Relay 4 NO, per coil code Coil

The Siemens 3RH2140-1A is a SIRIUS 3RH2 contactor relay (control relay) configured with 4 NO contacts and a per coil code control coil. Designed for auxiliary control, interlocking and signal multiplication in industrial control circuits, it is stocked in Saudi Arabia by Razz Middle East for use throughout the Kingdom's automation and motor control systems.

Technical Overview

Sharing the SIRIUS 3RT2 mechanical platform, the 3RH2140-1A provides 4 NO positively-driven auxiliary contacts to IEC 60947-5-1. The per coil code coil offers low holding power, and on AC types an integrated economy circuit limits panel heat rise. The same accessory interface as the contactor range accepts surge suppressors and additional contact blocks, allowing the relay to be expanded for complex interlocking schemes without rewiring.

Performance & Specifications

With 4 normally-open and 0 normally-closed contacts, the 3RH2140-1A multiplies control signals, builds latching and interlock logic, and isolates PLC outputs from field loads. It carries a 690 V insulation rating, IP20 finger-safe terminals and operates from -25 °C to +60 °C. The contacts are rated for the AC-15 and DC-13 control-circuit utilisation categories typical of solenoid valves, contactor coils and pilot lamps, and their positively-driven (mirror) construction guarantees that the NO and NC elements can never close simultaneously — a property relied upon in safety-related stop and interlock circuits. High mechanical endurance keeps the device dependable on frequently cycling sequencing duties.

Applications in Saudi Arabia

The 3RH2140-1A is used for control-circuit interlocking, signal multiplication and PLC output isolation across Saudi industry — in SABIC and Sadara petrochemical control panels in Jubail, NWC and SWCC pump-station logic, MAADEN plant control systems and ARAMCO utility switchgear, wherever reliable auxiliary switching is required between controllers and power devices.

Installation & Integration

The 3RH2140-1A mounts on 35 mm DIN rail and shares the SIRIUS 3RT2 footprint, so it interchanges mechanically with contactors of the same frame for tidy, uniform panel layouts. Additional auxiliary contact blocks clip to the front and sides to extend the contact complement for complex interlocking, and surge suppressors fit the same interface to protect adjacent electronics. Finger-safe box terminals accept a wide conductor range, and the device wires directly into PLC output and field-control circuits — allowing control-panel builders in Dammam, Jubail and Riyadh to standardise on a single relay platform.

Standards, Quality & Compliance

Every 3RH2140-1A supplied by Razz Middle East is a genuine Siemens product, manufactured under ISO 9001 quality management and conforming to the relevant IEC 60947 standards with international CE and UL approvals. Sourcing through an authorized channel guarantees correct datecodes, factory documentation and full warranty cover — a critical safeguard on safety-related motor control and protection equipment, where counterfeit components present a real risk to plant and personnel. For ARAMCO, SABIC, MAADEN, NWC and NEOM contractors operating under strict approved-vendor and traceability regimes, this assurance shortens technical and commercial evaluation and keeps projects on schedule. Razz Middle East backs each delivery with selection support, cross-referencing from competitor part numbers and documented lead times.

Why Choose Razz Middle East for Siemens Products

Razz Middle East supplies the genuine, factory-sealed Siemens 3RH2140-1A as an authorized channel for Siemens industrial control products in the Kingdom of Saudi Arabia. Every contactor relay ships with full manufacturer documentation and traceability, protecting your facility from counterfeit risk on safety-critical equipment. Our technical desk responds to RFQs within four working hours, and we hold local stock in Dammam and Riyadh with onward delivery to Dammam, Jubail, Riyadh, Jeddah and Yanbu. Whether you are sourcing a single replacement for an unplanned shutdown or standardising a complete motor control centre, our team supports selection, cross-referencing and lead-time planning for ARAMCO, SABIC, MAADEN, SWCC/NWC and NEOM contractors across the Kingdom.