40.61.9.024.1003 Finder Miniature PCB relay 1pole 16A DC 24V

Finder 40.61.9.024.1003 – 16 A, 24 V DC Miniature PCB Power Relay

The Finder 40.61.9.024.1003 is a miniature electromechanical power relay from the Finder Series 40 range. Designed for electronic control equipment, printed circuit board assemblies and industrial automation systems, it combines a 24 V DC standard coil with a 16 A single changeover contact (1 CO / SPDT).

The relay allows a low-voltage DC control signal to operate a separate electrical circuit. Its changeover contact provides both normally open and normally closed switching paths, making it suitable for control, signalling, load switching and electrical interlocking applications.

The Finder Type 40.61 platform features a 250 V AC rated contact voltage, a 400 V AC maximum switching voltage and a 4000 VA AC-1 switching capacity under the manufacturer's specified conditions.

The 24 V DC standard coil consumes approximately 0.65 W, with a nominal coil resistance of 900 Ω and a rated coil current of approximately 27 mA. These characteristics make it suitable for appropriately rated industrial control outputs and electronic relay-driver circuits.

The .1003 suffix identifies a particular construction variant. Although the core Type 40.61 and 9.024 coil specifications can be established from Series 40 technical information, the exact contact material, enclosure classification and terminal details associated with 40.61.9.024.1003 should be confirmed against Finder's current ordering documentation before installation or substitution.

Key Advantages

• 16 A rated contact current for compatible power-switching applications.
• 24 V DC standard coil for industrial and electronic control systems.
• Approximately 0.65 W coil consumption for efficient electromechanical operation.
• One changeover contact (1 CO / SPDT) for flexible normally open and normally closed switching.
• 250 V AC rated contact voltage for suitable mains-voltage circuits.
• 4000 VA AC-1 switching capacity for compatible resistive loads.
• Compact miniature construction for space-efficient electronic assemblies.
• Monostable operation for automatic contact return when coil power is removed.
• 6 kV coil-to-contact impulse withstand voltage in the standard Type 40.61 design.
• 8 mm coil-to-contact creepage and clearance for substantial electrical separation.
• PCB and compatible socket mounting options for flexible equipment integration.
• Finder Series 40 platform for industrial automation, electrical controls and OEM equipment.

Key Features

• Finder Series 40 miniature electromechanical power relay.
• Type 40.61 single-pole changeover design.
• Manufacturer part number: 40.61.9.024.1003.
• Rated contact current: 16 A.
• Nominal coil voltage: 24 V DC.
• Coil classification: Standard DC.
• Contact arrangement: 1 CO / SPDT.
• Rated contact voltage: 250 V AC.
• Maximum switching voltage: 400 V AC.
• Rated AC-1 switching capacity: 4000 VA.
• Nominal coil resistance: 900 Ω.
• Nominal coil current: approximately 27 mA.
• Nominal coil consumption: approximately 0.65 W.
• Typical operate time: 7 ms.
• Typical release time: 3 ms.
• Monostable, non-latching operation.
• Compact Type 40.61 PCB/plug-in relay format.

Specification note: The Type 40.61 electrical characteristics and 24 V DC standard-coil values are supported by Series 40 technical information. An exact manufacturer product record for suffix .1003 was not independently established. Contact material, environmental protection, terminal length, approvals and any special construction characteristics must therefore be verified before use.

24 V DC Standard Coil for Industrial Control Systems

The Finder 40.61.9.024.1003 uses a 24 V DC standard coil, making it suitable for control systems powered by a regulated or appropriately specified 24 V DC supply.

24 V DC is commonly used in industrial control panels, automation equipment, machine control systems and electronic interfaces.

The relay's standard coil has a nominal resistance of 900 Ω and draws approximately 27 mA at its rated voltage. This corresponds to a nominal power consumption of approximately 0.65 W.

The standard Type 40.61 DC-coil operating range is approximately 17.5 to 36 V DC, subject to the manufacturer's specified operating conditions and ambient temperature.

When selecting a control supply, account for voltage tolerances, cable voltage drop, coil energisation requirements and the operating temperature of the equipment.

The relay may be operated using a suitably rated PLC output, transistor, MOSFET or dedicated relay-driver circuit. The output must be able to supply the coil current and withstand switching transients.

Where necessary, use an appropriate coil suppression device to protect the driver electronics. The suppression method can affect relay release time and should be selected with the application in mind.

Standard DC Coil Versus Sensitive DC Coil

Finder Series 40 relays are available with standard and sensitive DC-coil options.

The 40.61.9.024.1003 uses the 9.024 standard DC coil, while comparable Type 40.61 models with coil code 7.024 use a sensitive DC coil.

The nominal voltage is the same, but the coil characteristics differ:

• Standard 24 V DC coil (9.024): Approximately 900 Ω, 27 mA and 0.65 W.
• Sensitive 24 V DC coil (7.024): Approximately 1150 Ω, 21 mA and 0.5 W.

These differences can affect the power supply, relay-driver circuit and thermal characteristics of the installation.

When replacing an existing relay, the complete coil code should be matched rather than selecting a replacement solely on the basis of its nominal voltage.

16 A SPDT Changeover Contact for Flexible Switching

The Finder Type 40.61 provides one changeover contact (1 CO / SPDT), allowing a common electrical connection to switch between two contact paths.

The contact arrangement includes:

• Common (COM): The shared switching terminal.
• Normally closed (NC): Connected to common when the relay coil is de-energised.
• Normally open (NO): Connected to common when the relay coil is energised.

When the 24 V DC coil is energised, the common contact transfers from the normally closed terminal to the normally open terminal.

When coil power is removed, the relay returns to its normal position.

This configuration supports load switching, changeover functions, alarm signalling and electrical interlocking.

The 16 A rated contact current and 4000 VA AC-1 switching capacity apply to suitable loads under specified operating conditions.

Motors, transformers, solenoids, capacitive circuits and LED drivers can generate high inrush currents or switching transients. These loads should be assessed against the applicable Finder contact ratings rather than the general resistive-load rating alone.

Electrical Isolation Between Coil and Contacts

The Finder Type 40.61 is designed to provide substantial electrical separation between the control coil and the switched contact circuit.

The standard design offers 8 mm creepage and clearance between coil and contacts, together with a specified 6 kV impulse withstand voltage.

These characteristics support equipment designs where low-voltage electronic controls operate a separate higher-voltage electrical circuit.

The complete installation must still comply with applicable safety requirements, including PCB clearances, conductor sizing, protective devices, enclosure construction and suitable installation practices.

Understanding the .1003 Construction Variant

The .1003 suffix forms part of Finder's full ordering code and identifies a specific relay construction.

Different Series 40 suffixes can distinguish contact materials, enclosure protection, terminal configurations and other manufacturer-defined options.

For the 40.61.9.024.1003, the precise construction details should be checked against Finder's current part-number documentation.

In particular, do not assume that the .1003 variant has the same contact material, enclosure classification or terminal dimensions as a .1000, .1001 or .4000 relay.

These details can be important when replacing an existing component, selecting a compatible socket or manufacturing a printed circuit board.

Compact PCB and Socket Mounting

The Finder Type 40.61 is part of a compact PCB and plug-in relay family.

The standard relay body measures approximately 29 × 12.4 × 25 mm, with a 5 mm contact pin pitch.

Selected Finder Series 95 sockets offer alternative installation arrangements, including DIN rail mounting where the correct socket is specified.

Before selecting a socket or designing a PCB footprint, verify the exact pin configuration associated with the .1003 suffix.

Where the relay is used to switch substantial currents, the socket, PCB copper tracks, solder joints and external wiring must all be appropriately rated for the intended electrical load.

Typical Applications

• Industrial automation and machine control equipment.
• 24 V DC control circuits.
• Printed circuit board power switching.
• Programmable logic controller output interfaces.
• Building automation systems.
• Heating, ventilation and air-conditioning controls.
• Electronic appliance control boards.
• Industrial monitoring and signalling equipment.
• Electrical load changeover circuits.
• Control panel assemblies.
• Compatible actuator and valve control circuits.
• OEM electrical and electronic equipment.
• Industrial maintenance and repair.
• Replacement of matching Finder Series 40 relays.