Finder Relay, model 55.34.8.048.0040 — 48 V AC coil, 7 A, 4 changeover (4 CO) contacts

Electromechanical Finder relay model 55.34.8.048.0040 provides reliable mechanical switching with a 48 V AC coil and four changeover (4 CO) contacts. Designed for panel or socket mounting in DIN-compatible enclosures, this relay is intended for applications that require galvanic isolation between control and load circuits and simple on/off control for multiple circuits. The compact form factor and standardized mounting make it suitable for use in automation panels, HVAC control systems, lighting circuits and other installations where dependable, low-complexity switching is needed.

Advantages

The relay supports switching of loads up to 7 A per contact and offers four independent changeover contacts for flexible circuit configuration. Its electromechanical design provides clear, physical isolation between coil and contacts, reducing interference with control electronics. The DIN-compatible format simplifies integration into existing control panels and standard sockets, while the proven Finder construction ensures predictable mechanical operation and straightforward replacement or maintenance.

Suitable for

• Control of HVAC equipment such as fans and pumps
• Lighting circuits and lighting control panels
• General machine control and automation tasks
• Signal switching where galvanic isolation is required

Key specifications

• Coil voltage: 48 V AC
• Contact arrangement: 4 changeover (4 CO) contacts
• Contact rating: up to 7 A per contact
• Mounting: DIN-compatible panel or socket mounting
• Type: electromechanical relay

How to use

Mount the relay in the appropriate DIN socket or panel location following the panel layout and wiring standards in use. Connect the 48 V AC control supply to the coil terminals and wire load circuits to the changeover contact terminals according to the required normally-open or normally-closed configuration. Ensure wiring is performed with the power off and verify terminal connections and tightening torque per installer guidelines. After installation, apply the 48 V AC to actuate the coil and confirm correct switching of each contact under the expected load conditions.

Usage recommendations

Use the relay within its rated contact current and voltage limits; avoid continuous operation at maximum rating without thermal consideration. Provide appropriate overload protection and contact protection (such as snubbers or RC networks) when switching inductive loads. For long-term reliability, follow regular inspection and maintenance schedules and replace the relay if mechanical wear or contact degradation is observed.