40.61.7.005.1000 Finder Miniature PCB relay 1pole 16A DC 5V

Why Choose the Finder 40.61.7.005.1000 5 V DC 16 A Miniature PCB Relay?

The Finder 40.61.7.005.1000 is a compact 5 V DC miniature electromagnetic relay from the Finder 40 Series, designed for switching electrical loads using low-voltage electronic control signals. Featuring a 16 A rated contact current and one changeover contact (1CO / SPDT), it offers a versatile solution for electronic control boards, industrial automation equipment and embedded switching applications.

Its sensitive DC coil enables operation from a suitable 5 V control supply, making it useful in electronic equipment where low-voltage control circuitry must operate a separate load circuit. The relay's electromechanical contacts provide galvanic separation between the control and switched circuits when installed within the specified electrical limits.

The Finder 40.61 design combines compact dimensions, high contact capacity and reinforced coil-to-contact insulation. Its miniature construction makes it particularly suitable for printed circuit boards and control assemblies where installation space is limited but dependable switching performance remains essential.

As a monostable relay, the Finder 40.61.7.005.1000 returns to its normal contact position when coil power is removed. This makes it suitable for applications requiring a defined de-energised switching state rather than retained or latching operation.

Key Advantages

• 16 A rated switching current for compatible electrical loads.
• 5 V DC sensitive coil for low-voltage electronic control circuits.
• One changeover contact (1CO / SPDT) provides flexible switching functionality.
• Monostable operation automatically returns the contacts to their normal position.
• Compact miniature housing helps reduce PCB and equipment space requirements.
• 500 mW sensitive coil design reduces control power requirements.
• Electrical isolation between the coil circuit and switched contacts.
• 6 kV coil-to-contact impulse withstand capability in the 40.61 relay family.
• 8 mm coil-to-contact creepage and clearance design.
• 5 mm contact terminal pitch supports compact PCB layouts.
• Fast electromechanical switching for responsive control applications.
• Wide operating temperature capability for industrial environments.
• Compatible with appropriately selected relay mounting arrangements.
• Suitable for control boards, automation interfaces and electrical equipment.
• Finder 40 Series engineering for professional switching applications.

Key Features

• Finder 40 Series miniature power relay.
• Type 40.61 single-pole relay construction.
• 5 V DC nominal coil voltage.
• Sensitive DC electromagnetic coil.
• 500 mW nominal coil power.
• Approximately 50 Ω nominal coil resistance.
• Approximately 100 mA nominal coil current.
• One changeover contact.
• SPDT / Form C contact configuration.
• 16 A rated contact current.
• 250 V AC rated contact voltage.
• 400 V AC maximum switching voltage.
• 4,000 VA rated AC-1 switching capacity.
• 750 VA AC-15 load rating at 230 V AC.
• 0.55 kW single-phase motor rating at 230 V AC.
• Monostable, non-latching operation.
• Approximately 7 ms operate time.
• Approximately 3 ms release time.
• 6 kV coil-to-contact impulse insulation.
• 8 mm coil-to-contact separation.
• 5 mm contact pin pitch.
• Compact 29 × 12.4 × 25 mm relay body.
• −40 to +85 °C ambient operating temperature range.

How the Finder 40.61.7.005.1000 Relay Works

The Finder 40.61.7.005.1000 uses an electromagnetic coil to operate a single changeover contact. The coil and contact circuits are electrically separate, allowing a compatible low-voltage control signal to operate a different electrical circuit.

When the 5 V DC coil is de-energised, the common contact is connected to its normally closed (NC) terminal. Applying the appropriate DC voltage energises the coil, moving the common contact to the normally open (NO) terminal.

When the control voltage is removed, the relay's spring mechanism returns the contact to its normal position. This monostable operation differs from a bistable relay, which retains its last selected contact position without continuous coil power.

The relay's 500 mW sensitive DC coil requires approximately 100 mA at 5 V DC. Although this is a relatively low-power coil, it should not be driven directly from a microcontroller output unless that output is specifically rated to supply the required current. A suitable transistor, MOSFET or relay-driver circuit is commonly used.

When a semiconductor driver controls the relay coil, appropriate inductive transient suppression should be included. A correctly selected flyback diode or alternative suppression arrangement helps protect the control electronics from voltage spikes when the coil is switched off.

The 16 A changeover contact can switch compatible resistive loads within the specified electrical ratings. The 40.61 relay family is rated at 4,000 VA for AC-1 loads, but the allowable current may be substantially lower for inductive, capacitive or high-inrush applications.

For example, LED drivers, switch-mode power supplies, motors and transformers can draw high inrush currents that exceed their normal running current. Such applications require assessment against the relevant Finder switching characteristics rather than relying solely on the general 16 A contact rating.

PCB Installation and Electrical Integration

The Finder 40.61 relay family is designed for compact electrical assemblies, with a 5 mm contact terminal pitch and a miniature housing measuring approximately 29 × 12.4 × 25 mm.

When integrating the 40.61.7.005.1000 into an electronic design, engineers should verify the exact terminal configuration and mounting arrangement against the product-specific Finder drawing. Different 40 Series variants can have different pin lengths, contact materials and environmental protection options.

For PCB applications, the board must provide appropriate copper track capacity, conductor clearances, creepage distances and thermal performance for the intended load. The relay's contact rating does not automatically establish the current-carrying capability of the PCB tracks or external wiring.

The Finder 40.61 family provides 6 kV impulse insulation between coil and contacts, with an 8 mm separation design. The complete assembly must nevertheless meet the insulation and protection requirements applicable to its installation.

Where a socket-mounted installation is required, compatibility with the selected Finder 95 Series socket should be confirmed using the exact relay suffix and socket datasheet. Socket-mounted current ratings may differ from the relay's standalone contact rating.

Typical Applications

• Industrial electronic control boards.
• Embedded controller output switching.
• Low-voltage electronic control systems.
• Electrical load switching in automation equipment.
• PCB-based industrial control assemblies.
• Building automation equipment.
• Electronic monitoring and alarm circuits.
• Control of appropriately rated auxiliary loads.
• Signal changeover and circuit selection.
• Electronic instrumentation and test equipment.
• Machine control electronics.
• Power management and switching assemblies.
• Remote equipment control circuits.
• Professional electronic prototyping.
• Repair and maintenance of compatible electrical equipment.