Finder 43.61.9.006.4300 – 43 Series PCB relays

Why Choose the Finder 43.61.9.006.4300 Low-Profile PCB Relay?

The Finder 43.61.9.006.4300 is a miniature electromechanical power relay from the Finder 43 Series, designed for high-current switching in compact printed circuit board assemblies. The 43.61 family features a 16 A contact rating, a low-profile housing and a single normally open contact, making it suitable for industrial automation, electronic control equipment and OEM switching applications.

The part number identifies a DC-coil relay with a single normally open (1 NO / SPST-NO) contact and silver tin oxide (AgSnO₂) contact material. This contact material offers good resistance to contact welding and is particularly useful for appropriately rated loads with elevated inrush currents.

The 43.61.9.006.4300 order code specifies a 6 V DC coil. However, the published 43.61 coil tables reviewed list 12, 24 and 48 V DC standard-coil options, so the electrical characteristics of this particular 6 V variant should be verified before final circuit design. The established 43.61 contact and construction characteristics are outlined below.

Key Advantages

• 16 A rated contact current for appropriately rated industrial and electronic loads.
• Single normally open (SPST-NO / 1 NO) contact configuration for straightforward switching.
• Silver tin oxide (AgSnO₂) contacts provide resistance to contact welding under suitable operating conditions.
• 250 V AC nominal contact voltage for compatible switching applications.
• 400 V AC maximum switching voltage under specified conditions.
• 4,000 VA rated AC-1 switching capacity for resistive loads.
• Compact low-profile construction helps conserve PCB assembly space.
• Reinforced coil-to-contact insulation provides separation between control and load circuits.
• 6 kV impulse withstand voltage between coil and contacts.
• RT II flux-proof construction supports conventional PCB assembly processes.
• Direct through-hole PCB mounting simplifies integration into electronic equipment.

Key Features

• Finder 43 Series miniature electromechanical power relay.
• 43.61 type with one normally open contact.
• 16 A rated switching current.
• 25 A maximum peak contact current.
• SPST-NO (1 NO / Form A) contact configuration.
• 250 V AC rated contact voltage.
• 400 V AC maximum switching voltage.
• 4,000 VA rated AC-1 switching capacity.
• 750 VA rated AC-15 switching capacity at 230 V AC.
• Silver tin oxide (AgSnO₂) contact material.
• Standard DC electromagnetic coil family.
• Reinforced insulation between coil and contact circuit.
• 10 mm coil-to-contact clearance and creepage.
• 6 kV coil-to-contact impulse withstand voltage.
• −40 to +85 °C operating temperature range for the published 43.61 family.
• RT II flux-proof environmental protection.
• 5 mm contact terminal pitch.
• Direct through-hole PCB mounting.

Reliable High-Current Switching for PCB Control Systems

The Finder 43.61 relay family uses an electromagnetic operating mechanism to control a normally open contact. When the coil is energised, the contact closes and allows current to flow through the connected load. When the coil is de-energised, the contact returns to its open position. This provides a straightforward method of controlling electrical loads from an isolated electronic control circuit.

The 16 A contact rating and AgSnO₂ contact material make the 43.61 family suitable for higher-current switching duties than many smaller PCB relays. Its compact design and reinforced insulation support integration into industrial electronic equipment, while the relay's actual load suitability must be assessed against the relevant AC or DC utilisation category.

Typical Applications

• Industrial automation and machinery control boards.
• Printed circuit board switching assemblies.
• Electronic equipment requiring high-current relay contacts.
• Building automation and electrical control systems.
• Lighting control and appropriately rated inrush-current loads.
• Heating and ventilation control equipment.
• Domestic and commercial appliance control boards.
• Automatic machinery and equipment switching.
• OEM electronic products and industrial control modules.
• Auxiliary switching circuits in electrical equipment.