Schneider Electric RHN-421B Industrial Control Relay

Description:

The Telemecanique RHN421B is an industrial plug-in control relay featuring a 24 V AC, 50 Hz coil, four changeover contacts, and a 1 A contact rating for reliable switching in low-level industrial control and automation circuits. Commonly installed in industrial control panels, OEM machinery, process automation systems, and instrumentation equipment where dependable signal switching and electrical isolation are required. Maintenance teams, OEMs, and system integrators use this plug-in relay for equipment replacement, preventive maintenance, retrofit projects, and maintaining reliable control system operation.

Applications:

The Telemecanique RHN421B provides reliable switching for PLC interfaces, instrumentation circuits, alarm systems, interlocking functions, and low-power industrial automation controls. It is widely used in manufacturing facilities, packaging machinery, material handling equipment, testing systems, and process automation applications where dependable relay performance improves system reliability and minimizes downtime.

Technical Specifications:

• Manufacturer Part Number (MPN): RHN421B
• Manufacturer: Telemecanique (Schneider Electric)
• Product Type: Plug-in Control Relay
• Series: Harmony Relay RHN
• Coil Voltage: 24 V AC, 50 Hz
• Rated Current: 1 A
• Auxiliary Contacts: 4 Changeover (4 C/O, 4PDT)
• Mounting Style: Plug-in Socket Mount
• Terminal Type: Plug-in Connection
• Compatible Systems: Industrial Automation and Control Systems
• Replacement Type: OEM Direct Replacement

Common Replacements

• Schneider Electric RXM4AB1B7
• Telemecanique RHN421B
• OEM Equivalent RHN421B