1. Introducción
This manual provides essential information for the safe and effective use of the Finder 40.31.9.024.0000 SPDT (Single Pole Double Throw) Electromechanical Relay. This relay is designed for general-purpose power switching applications, featuring a 24VDC coil and a 10A contact rating at 250VAC. It is suitable for through-hole mounting in various industrial and electronic circuits.
2. Información de seguridad
ADVERTENCIA: Electrical components can cause electric shock or fire if not handled correctly. Always observe the following safety precautions:
- Asegúrese de que la energía esté desconectada antes de realizar la instalación, el cableado o el mantenimiento.
- La instalación solo debe ser realizada por personal calificado.
- Verify all connections are secure and correct according to the wiring diagram.
- No exceda el volumen especificadotage and current ratings of the relay.
- Protect the relay from moisture, dust, and extreme temperatures.
- This product is RoHS compliant. Dispose of it according to local regulations at the end of its life cycle.
3. Producto terminadoview
The Finder 40.31.9.024.0000 is a compact electromechanical relay from the 40 Series, designed for reliable switching in various control circuits. It features a single pole double throw (SPDT) contact configuration, allowing it to switch between two circuits. The relay operates with a 24VDC coil and can handle up to 10 Amps at 250VAC. Its through-hole mounting design makes it suitable for PCB integration.

Figura 3.1: Frente view of the Finder 40.31.9.024.0000 SPDT Relay. This image shows the general appearance of the relay, typically a rectangular housing with pins extending from the bottom for PCB mounting.
4. Technical Diagrams and Dimensions
Understanding the physical dimensions and pin configuration is crucial for proper installation and integration into your circuit board. The following diagram illustrates the relay's footprint, pin spacing, and overall dimensions.

Figure 4.1: Technical drawing showing the dimensions and pinout of the Finder 40.31.9.024.0000 relay. The top-left diagram shows the bottom view with pin spacing (e.g., 3.5mm, 7.5mm, 20mm, 6mm). The top-right diagram illustrates the internal schematic with coil terminals A1, A2 and contact terminals 11 (common), 12 (normally closed), 14 (normally open). The bottom diagrams provide side and front views with overall dimensions (e.g., 29mm length, 25mm height, 12.4mm width, 0.4mm and 1mm pin thickness).
5. Instalación
The Finder 40.31.9.024.0000 relay is designed for through-hole mounting on a Printed Circuit Board (PCB). Follow these steps for proper installation:
- Prepare la PCB: Ensure the PCB has correctly sized holes and pad layouts matching the relay's pin configuration as shown in Figure 4.1.
- Insert the Relay: Carefully align the relay pins with the corresponding holes on the PCB. Ensure the relay is oriented correctly.
- Conexiones de soldadura: Solder each pin to its respective pad on the PCB. Use appropriate soldering techniques to ensure strong, reliable electrical and mechanical connections. The relay terminals are designed for soldering.
- Conexiones de bobina: Connect the 24VDC power supply to the coil terminals A1 and A2. Polarity is typically indicated on the relay or in the schematic (A1 positive, A2 negative for DC coils, but check specific markings).
- Conexiones de contacto: Connect the load circuits to the contact terminals:
- Terminal 11: Contacto común.
- Terminal 12: Normally Closed (NC) contact. This contact is closed when the coil is de-energized.
- Terminal 14: Normally Open (NO) contact. This contact is closed when the coil is energized.
- Verificar instalación: After soldering, visually inspect all connections for shorts, cold solder joints, or other defects.
6. Operación
The Finder 40.31.9.024.0000 relay operates by energizing its 24VDC coil. When the coil is energized, an electromagnetic field is created, which pulls the armature, causing the common contact (11) to switch from the Normally Closed (12) position to the Normally Open (14) position. When the coil is de-energized, the armature returns to its original state, and the common contact (11) reconnects with the Normally Closed (12) contact.
- Volumen de la bobinatage: Apply 24VDC to terminals A1 and A2 to activate the relay.
- Contact Switching: The relay provides a mechanical switch action, isolating the control circuit (coil) from the load circuit (contacts).
- Capacidad de carga: Ensure the switched load does not exceed 10 Amps at 250VAC. Exceeding these limits can damage the relay and connected equipment.
7. Mantenimiento
The Finder 40.31.9.024.0000 relay is a sealed component and generally requires minimal maintenance. However, periodic inspection can help ensure its longevity and reliable operation:
- Inspección visual: Regularly check for any signs of physical damage, discoloration, or overheating on the relay body and terminals.
- Condiciones ambientales: Ensure the operating environment remains within specified temperature and humidity ranges. Protect the relay from excessive dust or corrosive atmospheres.
- Integridad de la conexión: Periodically verify that all soldered connections remain secure and free from corrosion.
- Limpieza: Si es necesario, limpie suavemente el exterior del relé con un paño suave y seco. No utilice disolventes ni limpiadores abrasivos.
8. Solución de problemas
Si el relé no funciona como se espera, considere los siguientes pasos de solución de problemas:
- El relé no se activa:
- Check if the correct 24VDC is applied to coil terminals A1 and A2.
- Verify coil current (nominal 27mA).
- Inspect for open circuits in the coil wiring.
- Asegúrese de que la fuente de alimentación esté funcionando correctamente.
- Carga que no cambia:
- Confirm the relay coil is activating (a faint click might be audible).
- Check continuity across the contact terminals (11-12 and 11-14) when the coil is energized and de-energized.
- Verify that the load circuit is correctly wired to the common (11) and desired NO (14) or NC (12) contacts.
- Asegúrese de que la corriente y el volumen de cargatagNo exceda las capacidades de contacto del relé.
- Calentamiento excesivo:
- This indicates excessive current or voltage. Immediately disconnect power.
- Recheck all circuit parameters against the relay's specifications.
If issues persist after troubleshooting, consider replacing the relay or consulting a qualified technician.
9. Especificaciones
The following table summarizes the key electrical and mechanical specifications for the Finder 40.31.9.024.0000 relay. For detailed performance curves and additional characteristics, refer to the manufacturer's full datasheet (Figure 9.1 provides an overview of such data).

Figura 9.1: Sobreview of Finder 40.31.9.024.0000 Relay Characteristics. This image displays several tables and graphs, including general characteristics (insulation, immunity), contact characteristics (current vs. operations, current vs. DC voltage), and detailed coil characteristics for DC, AC, and AC/DC versions, showing nominal voltage, resistance, and power consumption.
| Parámetro | Valor |
|---|---|
| Número de modelo | 40.31.9.024.0000 |
| Configuración de contacto | SPDT (unipolar de doble tiro) |
| Volumen de la bobinatage | 24 VCC |
| Corriente de bobina | 27 mA |
| Resistencia de la bobina | 900 ohmios |
| Clasificación de corriente de contacto | 10 Amps |
| Corriente máxima de conmutación | 10 Amps (20A peak) |
| Volumen de contactotagy VAC | 250 V CA |
| Material de contacto | Plata y níquel |
| Tipo de montaje | Through Hole (PCB Mount) |
| Terminales de relé | Soldar |
| External Depth | 29 milímetros |
| External Height | 25 milímetros |
| Ancho externo | 12.4 milímetros |
| Nominal Operating Power | 650mW |
| Compatible con RoHS | Sí |
| Peso del artículo | 0.01 onzas (aprox. 0.28 gramos) |
10. Garantía y soporte
This Finder relay is manufactured to high-quality standards. For specific warranty information, please refer to the terms and conditions provided by your point of purchase or contact Finder directly. Technical support and further documentation can typically be found on the official Finder websitio o a través de distribuidores autorizados.