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40.31.9.024.0301 Finder Miniature PCB relay 1pole 10A DC 24V
Finder 40.31.9.024.0301 is an RT III wash-tight 10 A miniature electromechanical relay with one normally open contact, a standard 24 V DC coil and PCB or compatible socket mounting.
Why Choose the Finder 40.31.9.024.0301 Wash-Tight Normally Open Relay?
The Finder 40.31.9.024.0301 is a compact and reliable miniature electromechanical power relay designed for switching electrical loads in industrial controls, automation equipment and electronic systems. As part of the established Finder 40 Series, it combines a standard 24 V DC coil with one normally open contact and an RT III wash-tight enclosure.
This monostable relay provides dependable galvanic separation between its control and load circuits. It features an 8 mm coil-to-contact clearance and creepage distance with 6 kV impulse withstand voltage. Its wash-tight construction provides additional protection during compatible PCB soldering and cleaning processes.
With a 24 V DC coil, a 10 A rated contact current and an SPST-NO contact configuration, the 40.31.9.024.0301 is suitable for control circuits, lighting, resistive loads and general industrial switching. Its 3.5 mm contact pin pitch permits direct PCB mounting or installation in a compatible Finder 95 Series socket.
Key Advantages
- Compact normally open relay for industrial control and automation applications.
- 24 V DC coil compatible with commonly used control supplies.
- 10 A normally open contact for straightforward load switching.
- RT III wash-tight enclosure suits compatible PCB cleaning processes.
- 6 kV coil-to-contact impulse isolation provides dependable circuit separation.
- Direct PCB or compatible socket mounting offers flexible installation.
Key Features
- Finder 40 Series miniature PCB/plug-in relay.
- One normally open contact with SPST-NO configuration.
- 10 A rated contact current.
- 24 V DC standard coil.
- 900 Ω nominal coil resistance.
- 27 mA nominal coil current.
- Silver-nickel contact material.
- RT III wash-tight protection category.
Reliable Normally Open Switching for Control Systems
Electromechanical relays such as the Finder 40.31 allow a low-power DC control circuit to operate an electrically isolated load. The normally open contact remains open while the coil is de-energised and closes when 24 V DC is applied, making the relay suitable for direct on-and-off control functions.
The RT III enclosure helps protect the relay during compatible PCB washing processes, while its compact dimensions make efficient use of board space. Compatibility with Finder 95 Series sockets also provides a plug-in installation option for easier replacement and maintenance.
Typical Applications
- Industrial control panels and automation systems.
- Printed circuit boards requiring wash-tight components.
- Machine control and auxiliary switching circuits.
- Lighting and resistive load control.
- Building automation equipment.
- Timers, interface modules and control equipment.
Technical Specifications
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| Device Type | Plug-in Relay | |
|---|---|---|
| Terminal Type | PCB / pins | |
| Switching Current (A) | 10 A | |
| Load Voltage | 400 V AC | |
| Mounting Type | PCB, Plug-in socket | |
| Coil / Supply Voltage | 24 V DC | |
| Contacts | 2NO | |
| Manufacturer | Finder | |
| Series | 40 Series | |
| Model | 40.31.9.024.0301 | |
| Product type | Miniature electromechanical power relay | |
| Relay operation | Monostable / non-latching | |
| Contact configuration | 1 NO / SPST-NO | |
| Rated contact current | 10 A | |
| Rated contact voltage | 250 V AC | |
| Maximum switching voltage | 400 V AC | |
| Coil voltage | 24 V DC | |
| Coil type | Standard DC | |
| Coil operating range | 17.5–36 V DC | |
| Coil resistance | 900 Ω | |
| Nominal coil current | 27 mA | |
| Rated coil consumption | 0.65 W | |
| Operate time | 7 ms | |
| Release time | 3 ms | |
| Contact material | Silver nickel | |
| Coil-to-contact impulse withstand voltage | 6 kV | |
| Coil-to-contact clearance and creepage | 8 mm | |
| Protection category | RT III, wash tight | |
| Operating temperature | -40 to +85 °C | |
| Mechanical life | 10,000,000 cycles | |
| Mounting type | PCB or compatible socket | |
| Terminal type | Solder pins | |
| Contact pin pitch | 3.5 mm | |
| Dimensions (L × W × H) | 29 × 12.4 × 25 mm |
Frequently Asked Questions
What is the Finder 40.31.9.024.0301 used for?
This wash-tight miniature relay is used for normally open load switching in industrial controls, automation equipment and electronic systems.
What coil voltage does this relay require?
The Finder 40.31.9.024.0301 has a standard 24 V DC coil with a nominal resistance of 900 Ω.
What contact configuration does the relay provide?
The relay provides one normally open contact, also known as a single-pole single-throw normally open or SPST-NO contact.
What does the RT III protection category mean?
RT III identifies the relay as wash tight, making it suitable for compatible PCB cleaning processes after soldering.
How is this relay installed?
The relay can be soldered directly to a printed circuit board or fitted into a compatible Finder 95 Series socket.
Trusted by Control and Automation Professionals
Finder 40 Series relays are widely used by control engineers, panel builders and equipment manufacturers for dependable switching and straightforward integration into industrial and electronic systems.
