Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
40.51.8.120.0000 Finder Miniature PCB relay 1pole 10A 120V
Finder 40.51.8.120.0000 is a 10 A miniature electromechanical relay with one changeover contact, a 120 V AC coil and PCB or compatible socket mounting.
£5.90
Why Choose the Finder 40.51.8.120.0000 Miniature Relay?
The Finder 40.51.8.120.0000 is a compact and reliable miniature electromechanical 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 120 V AC coil with one changeover contact and a space-saving PCB or plug-in format.
This non-latching relay provides dependable galvanic isolation between its control and load circuits. It features an 8 mm coil-to-contact clearance and creepage distance with 6 kV impulse withstand voltage, while the flux-proof RT II enclosure supports reliable integration into automated PCB assembly processes.
With a 120 V AC coil, a 10 A rated contact current and an SPDT changeover configuration, the 40.51.8.120.0000 is suitable for control circuits, lighting, resistive loads and general industrial switching. Its 5 mm contact pin pitch allows direct PCB mounting or installation in a compatible Finder 95 Series socket.
Key Advantages
- Compact miniature relay for industrial control and automation applications.
- 120 V AC coil designed for 50/60 Hz control supplies.
- 10 A changeover contact supports versatile load switching.
- 6 kV coil-to-contact impulse isolation provides dependable circuit separation.
- Direct PCB or compatible socket mounting offers flexible installation.
- Flux-proof RT II construction supports automated assembly processes.
Key Features
- Finder 40 Series miniature PCB/plug-in relay.
- One changeover contact with SPDT configuration.
- 10 A rated contact current.
- 120 V AC coil.
- 9 kΩ nominal coil resistance.
- 8.4 mA nominal coil current.
- Cadmium-free silver-nickel contact material.
- 5 mm contact pin pitch for PCB or socket mounting.
Reliable Switching for Industrial Control Systems
Electromechanical relays such as the Finder 40.51 allow an AC control signal to operate an electrically isolated load circuit. The changeover contact provides normally open and normally closed switching paths, giving control-system designers flexibility when managing equipment states, interlocks and auxiliary functions.
The compact enclosure makes efficient use of PCB space, while compatibility with Finder 95 Series sockets provides an alternative plug-in installation method for easier replacement and maintenance. The relay’s insulation characteristics support dependable operation within industrial control equipment.
Typical Applications
- Industrial control panels and automation systems.
- Printed circuit boards and electronic assemblies.
- Machine control and auxiliary switching circuits.
- Lighting and resistive load control.
- Building automation equipment.
- Timers, interface modules and control equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Device Type | Plug-in Relay | |
|---|---|---|
| Terminal Type | PCB / pins | |
| Load Voltage | 400 V AC | |
| Mounting Type | PCB, Plug-in socket | |
| Switching Current (A) | 10 A | |
| Coil / Supply Voltage | 120 V AC | |
| Contacts | 1 C/O | |
| Manufacturer | Finder | |
| Series | 40 Series | |
| Model | 40.51.8.120.0000 | |
| Product type | Miniature electromechanical relay | |
| Relay operation | Monostable / non-latching | |
| Contact configuration | 1 CO / SPDT | |
| Rated contact current | 10 A | |
| Rated contact voltage | 250 V AC | |
| Maximum switching voltage | 400 V AC | |
| Coil voltage | 120 V AC | |
| Coil frequency | 50/60 Hz | |
| Coil resistance | 9 kΩ | |
| Nominal coil current | 8.4 mA | |
| Must-operate voltage | 96 V AC | |
| Must-release voltage | 24 V AC | |
| 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 II, flux proof | |
| Operating temperature | -40 to +85 °C | |
| Mounting type | PCB or compatible socket | |
| Terminal type | Solder pins | |
| Contact pin pitch | 5 mm | |
| Dimensions (L × W × H) | 29 × 12.4 × 25 mm |
Frequently Asked Questions
What is the Finder 40.51.8.120.0000 used for?
This miniature relay is used to switch electrical loads in industrial controls, automation equipment and electronic systems.
What coil voltage does this relay require?
The 40.51.8.120.0000 has a 120 V AC coil designed for operation at 50/60 Hz.
What contact configuration does the relay provide?
The relay provides one changeover contact, also known as a single-pole double-throw or SPDT contact.
What current is the relay rated to switch?
The Finder 40.51.8.120.0000 has a rated contact current of 10 A at 250 V AC.
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.
