40.61.8.120.1001 Finder Miniature PCB relay 1pole 16A 120V

Why Choose the Finder 40.61.8.120.1001 Miniature Power Relay?

The Finder 40.61.8.120.1001 is a miniature electromechanical power relay from the Finder Series 40, developed for industrial automation, electrical control panels, electronic equipment and power-switching applications. Featuring a 120 V AC operating coil, 16 A rated contact current and one changeover contact (1 CO / SPDT), this relay provides a compact interface between AC control circuits and compatible electrical loads.

This particular variant combines silver nickel (AgNi) contact material with RT III wash-tight construction. The cadmium-free AgNi contacts provide a practical solution for general-purpose electrical switching, while the wash-tight enclosure offers additional protection during suitable electronic assembly and cleaning processes.

The Finder 40.61.8.120.1001 is designed for direct PCB mounting or installation using compatible Finder Series 95 sockets. Its compact housing, 5 mm contact pin pitch and monostable switching mechanism make it suitable for equipment manufacturers, automation engineers and maintenance professionals requiring a reliable 120 V AC control relay.

Key Advantages

• 16 A rated contact current: Supports compatible industrial and commercial electrical loads.
• 120 V AC operating coil: Suitable for equipment using 120 V AC control supplies.
• Single changeover contact: Provides normally open and normally closed switching functions.
• Silver nickel contact material: Offers a cadmium-free contact solution for suitable general-purpose switching applications.
• RT III wash-tight protection: Provides enhanced sealing for appropriate electronic assembly processes.
• 250 V AC rated contact voltage: Supports compatible mains-voltage load switching.
• Monostable operation: Returns the contacts to their normal position when coil power is removed.
• Compact miniature construction: Helps conserve space in control panels and electronic equipment.
• PCB mounting capability: Supports direct integration into electronic control assemblies.
• Compatible socket mounting: Allows installation using suitable Finder Series 95 relay sockets.
• 6 kV impulse insulation: Supports electrical separation between coil and contact circuits.
• Established Finder Series 40 platform: Provides a versatile relay solution for industrial automation and electrical maintenance.

Key Features

• Finder Series 40 miniature electromechanical power relay.
• Type 40.61 single-pole relay construction.
• 120 V AC nominal coil voltage.
• 50/60 Hz AC coil operation.
• One changeover contact (1 CO / SPDT).
• 16 A rated contact current.
• 250 V AC rated contact voltage.
• 400 V AC maximum switching voltage, subject to installation conditions.
• Silver nickel (AgNi) contact material.
• Cadmium-free contact construction.
• RT III wash-tight environmental protection.
• Monostable, non-latching operating mechanism.
• Approximately 1.2 VA nominal AC coil consumption.
• Compact miniature relay housing.
• 5 mm contact pin pitch.
• Direct PCB or compatible Finder Series 95 socket mounting.
• 6 kV coil-to-contact impulse withstand insulation.
• Suitable for industrial control, automation and electronic switching equipment.

Reliable 120 V AC Switching with Wash-Tight Protection

The Finder 40.61.8.120.1001 provides an electromechanical switching interface between a 120 V AC control circuit and a compatible electrical load. When the operating coil is energised, the common contact transfers from the normally closed terminal to the normally open terminal. When the coil supply is removed, the relay returns to its normal contact position.

This monostable switching mechanism is suitable for conventional control systems where the output must follow the energised or de-energised condition of the operating coil. It can be used for auxiliary switching, equipment control, electrical interlocking and status indication within appropriately designed circuits.

The relay's 16 A rated contact current provides useful switching capability for compatible electrical loads. Its standard Series 40 contact specification includes a 4,000 VA AC-1 resistive load rating and a 750 VA AC-15 rating at 230 V AC. The permissible load must always be selected according to the actual switching duty, particularly where inductive loads, motors, transformers or LED drivers may produce elevated inrush currents.

The silver nickel (AgNi) contacts offer a cadmium-free alternative to traditional silver cadmium oxide contact materials. AgNi contacts are suitable for a range of general-purpose switching applications, with their electrical performance dependent on the connected load, operating voltage and switching frequency.

A key feature of the 40.61.8.120.1001 is its RT III wash-tight construction. Compared with standard RT II flux-proof relays, RT III construction provides additional protection against the ingress of suitable cleaning liquids during electronic assembly processes. This makes the variant useful where manufacturing procedures require a wash-tight relay enclosure.

RT III protection should not be confused with unrestricted waterproof operation. The relay must still be installed within the manufacturer's specified environmental conditions, and any cleaning process must comply with the applicable assembly guidance.

The relay's 120 V AC coil is intended for operation at 50/60 Hz. Its nominal consumption is approximately 1.2 VA, and the control supply should remain within the specified operating range. The AC coil must not be connected directly to a DC supply or substituted for a relay with a different nominal coil voltage.

For installation, the compact Finder Series 40 housing supports direct PCB mounting or compatible Finder Series 95 socket arrangements. Engineers should verify the selected socket's terminal configuration, current rating and installation requirements, as socket ratings may differ from the relay's own contact ratings.

Typical Applications

• Industrial automation and machinery control.
• Electrical control panels using 120 V AC supplies.
• Printed circuit board switching assemblies.
• Electronic equipment requiring wash-tight relay construction.
• Industrial process control and monitoring systems.
• Building automation and electrical control equipment.
• Auxiliary circuit switching and control signalling.
• Electrical interlocking and equipment status indication.
• Power management and compatible load switching.
• OEM electronic equipment manufacturing.
• Control systems requiring a single changeover contact.
• Electronic assemblies using suitable post-solder cleaning processes.
• Compatible Finder Series 95 socket-based installations.
• Maintenance and replacement of matching Finder Series 40 relay variants.