68.55.9.012.4300 Finder 4 NO Contacts and 1 NC Contacts 12V DC Power Relay

Why Choose the Finder 68.55.9.012.4300 Power Relay?

The Finder 68.55.9.012.4300 is a high-power PCB-mount relay designed for switching substantial electrical loads in industrial power electronics and control equipment. It features a versatile 4 normally open contacts and 1 normally closed contact (4 NO + 1 NC) configuration, allowing simultaneous switching of multiple circuits while providing an auxiliary signalling or monitoring contact.

Equipped with a 12 V DC control coil, this relay can switch up to 40 A per pole, making it suitable for demanding applications such as EV charging systems, industrial heating equipment, renewable energy inverters and UPS systems. The relay uses durable AgSnO₂ contact material, ensuring excellent resistance to inrush currents and long electrical life when switching high-power loads.

As part of the Finder Series 68 high-power relay family, the 68.55 model is engineered for printed circuit board installation and offers reliable high-current switching performance in compact electronic assemblies.

Key Features

• 4 NO + 1 NC contact configuration for power switching with auxiliary feedback contact.
• High switching capacity up to 40 A per pole.
• 12 V DC coil voltage for industrial control electronics.
• PCB mounting design for integration into power electronics and control boards.
• AgSnO₂ contact material designed to withstand high inrush currents.
• Peak current capability up to 300 A (1 ms).
• Maximum switching voltage up to 400 V AC.
• Contact gap ≥ 4 mm ensuring strong electrical isolation.
• Flux-proof enclosure (RT II) suitable for automated PCB assembly.
• Reinforced insulation between coil and contacts for improved safety.

Technical Specifications

• Manufacturer: Finder
• Series: 68 Series high-power relays
• Model: 68.55.9.012.4300
• Product type: High-power PCB relay
• Contact configuration: 4 NO + 1 NC
• Main contact rating: 40 A per pole
• Auxiliary NC contact rating: approx. 3 A
• Rated switching voltage: 250 V AC
• Maximum switching voltage: 400 V AC
• Maximum peak current: 300 A (1 ms)
• Contact material: AgSnO₂ (silver tin oxide)
• Coil voltage: 12 V DC
• Rated coil power: approx. 2.9 W
• Operate time: approx. 25 ms
• Release time: approx. 3–6 ms
• Mechanical life: 1 × 10⁶ operations
• Electrical life: approx. 30 × 10³ operations at rated load
• Mounting: Printed circuit board (PCB)
• Protection category: RT II (flux-proof)
• Operating temperature: −40 °C to +70 °C

Typical Applications

• Electric vehicle charging equipment.
• Renewable energy and photovoltaic power systems.
• UPS and battery charging equipment.
• Industrial heating and high-power load control.
• Industrial automation and power electronics modules.

Trusted by Power Electronics Engineers

Finder Series 68 relays are widely used by equipment manufacturers and engineers worldwide for dependable switching of high electrical loads in modern power electronics and industrial automation systems.