Why Choose the Finder 67.23.9.012.4300S Power Relay?
The Finder 67.23.9.012.4300S is a high-current 50 A PCB-mounted electromechanical power relay from the Finder 67 Series, designed for photovoltaic inverters, solar energy systems and industrial power management applications. Featuring a 12 V DC operating coil, three normally open contacts and a double-break contact arrangement, this relay provides reliable switching and electrical isolation for demanding power control equipment.
The relay incorporates a three-pole normally open (3 NO / 3PST-NO) contact configuration, enabling three electrical circuits to be switched simultaneously through a single control signal. Its silver tin oxide (AgSnO₂) contacts support high-current switching, while a contact gap of at least 3 mm provides the contact separation required for suitable photovoltaic inverter applications.
The 67.23.9.012.4300S is a specialised version intended for applications requiring high-current switching, including configurations using three contacts connected in parallel in accordance with Finder's application requirements. With a 50 A rated contact current, 400 V AC resistive switching rating and reinforced insulation between coil and contacts, it is particularly suited to solar inverter manufacturers, industrial equipment designers and power electronics applications.
Key Advantages
- 50 A rated contact current for high-current electrical switching.
- 12 V DC operating coil suitable for compatible low-voltage control circuits.
- Three normally open contacts enable simultaneous switching of three electrical circuits.
- Double-break contact design provides enhanced contact separation.
- Contact gap of at least 3 mm supports photovoltaic inverter isolation requirements.
- Special S version designed for high-current applications using three contacts connected in parallel under specified conditions.
- Silver tin oxide (AgSnO₂) contact material supports demanding power-switching duties.
- PCB through-hole mounting enables integration into inverter and power electronics assemblies.
- Reinforced insulation between the coil and contacts.
- 1.7 W nominal coil consumption with an energy-saving holding-power capability of approximately 170 mW when operated using a suitable control circuit.
- Suitable for solar energy systems, industrial automation and electrical power management.
Key Features
- Finder 67 Series high-current power relay.
- 12 V DC nominal coil voltage.
- 3 NO (3PST-NO) contact configuration.
- 50 A rated contact current per contact under specified resistive load conditions.
- 400 V AC resistive load switching rating.
- 690 V AC maximum switching voltage.
- Double-break normally open contacts.
- At least 3 mm contact gap.
- AgSnO₂ contact material.
- 85 Ω nominal coil resistance.
- 1.7 W nominal DC coil consumption.
- PCB through-hole mounting with solder terminals.
- Reinforced coil-to-contact insulation.
- RT II environmental protection category.
- Designed for photovoltaic inverter and industrial power switching applications.
High-Current Switching for Photovoltaic Inverters and Power Management
The Finder 67.23.9.012.4300S is designed for electrical systems requiring dependable switching of substantial electrical loads, particularly photovoltaic inverters and industrial power conversion equipment. When its 12 V DC coil is energised, the electromagnetic mechanism closes the three normally open contacts, enabling current to flow through the connected circuits. When the coil is de-energised, the contacts open to interrupt the electrical paths.
Unlike conventional single-break power relays, the Finder 67 Series incorporates a double-break contact arrangement with a contact gap of at least 3 mm. This construction is especially relevant to photovoltaic inverter designs requiring appropriate electrical separation between connected circuits.
The S suffix identifies a special version associated with high-current operation using three contacts connected in parallel. Such an arrangement must follow Finder's specified wiring, current-sharing and operating requirements; the individual 50 A contact ratings must not simply be added together to determine an unrestricted switching capacity.
Its PCB mounting format supports direct integration into power electronics assemblies, while the energy-saving coil capability can reduce holding power when an appropriate drive circuit is used. Engineers should verify the intended switching voltage, AC or DC load characteristics, inrush current, thermal conditions and contact configuration against the manufacturer's application guidance.
Typical Applications
- Photovoltaic inverters and solar power conversion equipment.
- Solar energy generation and grid-interface systems.
- Industrial power management equipment.
- High-current electrical switching assemblies.
- Power electronics and inverter control boards.
- Industrial automation and electrical control systems.
- Energy conversion and electrical distribution equipment.
- OEM power supply and electrical equipment manufacturing.
- Electrical isolation and switching within suitable inverter designs.
- High-current applications using manufacturer-approved parallel-contact arrangements.
