Siemens 3rh1140-1ak60 Contactor Control Relay 4NO

Product Description

The SIEMENS 3rh1140-1ak60 is a contactor control relay designed for use in industrial control circuits requiring reliable switching and signal amplification. Equipped with a 4NO (four normally open) contact configuration and a 110/120 VAC coil, this relay interfaces with control-voltage circuits operating at 50 or 60 Hz. The IP20-rated enclosure and threaded terminal connections make it well suited for panel-mount applications where personnel protection and secure wiring are priorities. Licensed HVAC/R technicians, industrial electricians, and controls specialists typically specify this component in motor control centers, machine control panels, and automation systems.

This relay is intended for commercial and industrial installations where a dedicated control relay is needed to multiplex or amplify switching signals within a panel. The snap-on DIN-rail mounting style allows for straightforward integration alongside contactors, overload relays, and other SIRIUS-series components. Its operating temperature range of -25 to 60 degrees C makes it viable in both indoor climate-controlled enclosures and unheated industrial spaces. The 4NO contact form supports applications that require multiple simultaneous make contacts from a single coil energization.

Key Features

• 4NO contact form provides four independently wired normally open switching paths from one coil
• 110/120 VAC coil voltage matches standard North American control-circuit voltage levels
• Snap-on DIN-rail mounting for fast, tool-free installation alongside other SIRIUS-series devices
• IP20 enclosure rating guards against finger contact with live parts in open panel environments
• Threaded terminal connections ensure vibration-resistant, code-compliant wiring terminations
• Certified to CCC, CE, CSA, EAC, EN 60947, IEC 60947, and UL standards for broad market acceptance

Compatibility

Designed as an OEM-style contactor control relay for use within SIRIUS-series modular control panel assemblies where a 4NO, 110/120 VAC coil relay is required.

Installation Notes

Installation should be performed by a qualified industrial electrician in accordance with the NEC and applicable IEC 60947 guidelines. De-energize and lock out the control panel completely before removing or installing this relay. Snap the unit firmly onto the DIN rail and verify all threaded terminal screws are tightened securely before re-energizing. Do not exceed the rated contact current or apply voltages outside the specified coil and contact ranges.

Technical Specifications

• Contact Form: 4NO
• Coil Voltage: 110/120 VAC
• Frequency Rating: 50/60 Hz
• Contact Rating: 6/1 A at 230/690 VAC, 10/1 A at 24/220 VDC
• Enclosure Type: IP20
• Temperature Rating: -25 to 60 degrees C
• Mounting Type: Snap-On DIN Rail
• Terminal Type: Threaded
• Dimensions: 2.264 inches H x 1.772 inches W x 2.835 inches D
• Standards and Approvals: CCC Certified, CE Marked, CSA Certified, EAC Rated, EN 60947 Rated, IEC 60947, UL Listed

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3rh1140-1ak60