40.61.9.018.1301 Finder Miniature PCB relay 1pole 16A DC 18V

Why Choose the Finder 40.61.9.018.1301 Miniature Power Relay?

The Finder 40.61.9.018.1301 is a compact miniature electromechanical power relay from the Finder 40 Series, featuring an 18 V DC standard coil, a 16 A single normally open contact and a wash-tight RT III construction. Designed for industrial automation, PCB assemblies and electronic control equipment, this relay provides a practical interface between low-voltage DC control electronics and separately supplied electrical loads.

The 40.61.9.018.1301 is a specialised version of the Finder 40.61 relay family. Its normally open (1 NO / SPST-NO) contact configuration closes when the relay coil is energised, making it suitable for straightforward energise-to-close switching applications. The wash-tight construction provides additional protection during compatible electronic assembly and cleaning processes.

Featuring a 0.65 W standard DC coil, 500 Ω nominal coil resistance and 36 mA nominal coil current, the relay is suitable for control circuits designed around an 18 V DC supply. The Finder 40.61 contact platform provides a 16 A rated contact current and compact construction for industrial and OEM applications.

Key Advantages

• 18 V DC standard coil supports compatible low-voltage DC control circuits.
• 16 A rated contact current provides switching capability for appropriately rated electrical loads.
• Normally open contact configuration enables straightforward energise-to-close control.
• 0.65 W nominal coil power provides defined electrical requirements for control circuit design.
• Wash-tight RT III construction supports suitable PCB manufacturing and cleaning processes.
• Compact miniature housing helps conserve space in electronic equipment.
• Finder 40 Series construction supports integration into industrial automation and OEM systems.
• Electromechanical switching provides electrical separation between the coil and load circuits.
• Monostable operation provides predictable contact behaviour when the coil is energised or de-energised.
• PCB-compatible design supports integration into electronic control assemblies.

Key Features

• Finder 40 Series miniature electromechanical power relay.
• 40.61 relay type with a single-pole contact arrangement.
• 18 V DC nominal coil voltage.
• Standard DC coil with approximately 0.65 W nominal consumption.
• 500 Ω nominal coil resistance.
• 36 mA nominal coil current.
• 13.1–27 V DC coil operating range for the standard 18 V DC coil.
• 1 NO / SPST-NO contact configuration.
• 16 A rated contact current.
• 250 V AC rated switching voltage for the 40.61 contact family.
• Wash-tight RT III construction.
• 6 kV coil-to-contact impulse withstand voltage for the 40.61 family.
• 8 mm coil-to-contact clearance and creepage distance.
• 5 mm contact pin pitch.
• Monostable, non-latching operation.

Reliable 18 V DC Normally Open Switching for Industrial Automation

The Finder 40.61.9.018.1301 provides a compact interface between 18 V DC control electronics and electrical load circuits. Its normally open contact remains open while the coil is de-energised and closes when the coil receives the appropriate control voltage. This operating principle makes the relay useful for auxiliary switching, equipment control and industrial automation functions requiring energise-to-close operation.

The standard DC coil has a nominal resistance of 500 Ω and draws approximately 36 mA at its rated voltage. These characteristics help engineers select appropriate electronic relay drivers, controller outputs and coil suppression components. The relay should be driven using a circuit designed for its coil requirements and operating voltage range.

The RT III wash-tight construction is particularly relevant to PCB manufacturing and electronic assembly processes. It provides protection during compatible washing operations, although it should not be interpreted as a general-purpose waterproof rating or as permission for unrestricted exposure to liquids.

For switching applications, engineers should assess the connected load against the appropriate contact ratings and utilisation category. Motors, inductive devices and equipment with high inrush currents may require additional circuit protection or a switching device specifically rated for the intended duty. The exact 40.61.9.018.1301 variant should be checked for mounting and contact compatibility before replacing another Finder 40.61 relay.

Typical Applications

• Industrial automation and machinery control.
• 18 V DC electronic control circuits.
• Normally open electrical load switching.
• PCB-mounted electronic control assemblies.
• OEM machinery and electrical equipment.
• Electronic assemblies requiring wash-tight relay construction.
• Electrical control panels and auxiliary circuits.
• Building automation and equipment management.
• Industrial monitoring and equipment control.
• Embedded electronic control modules.