Why Choose the Finder 55.34.9.140.0040 Industrial Relay?
The Finder 55.34.9.140.0040 is a compact 7 A industrial electromechanical relay featuring a 140 V DC operating coil, four changeover contacts and a convenient plug-in mounting arrangement. Part of the Finder 55 Series, this relay is designed for industrial automation, electrical control panels, auxiliary switching and equipment requiring multiple contact circuits.
Its 4 CO / 4PDT contact configuration enables four separate changeover circuits to be controlled by a single electromagnetic coil. Each pole includes normally open and normally closed connections, providing flexibility for control, signalling, interlocking and auxiliary switching applications.
The Finder 55.34.9.140.0040 features silver-nickel (AgNi) contacts, a lockable test button and a mechanical indicator. The plug-in design supports installation into compatible Finder 94 Series sockets, making the relay suitable for control panel construction, commissioning and maintenance.
Key Advantages
- 140 V DC nominal coil voltage for compatible industrial DC control supplies.
- Four changeover contacts (4 CO / 4PDT) for flexible multi-circuit switching.
- 7 A rated contact current for appropriately rated electrical loads.
- 250 V AC rated contact voltage for general-purpose control applications.
- Silver-nickel (AgNi) contacts for reliable electromechanical switching.
- Lockable test button for manual contact operation during suitable maintenance procedures.
- Mechanical indicator provides a visible indication of relay contact operation.
- Plug-in mounting simplifies replacement and servicing.
- Finder 94 Series socket compatibility supports integration into control panels.
- Compact four-pole design reduces the space required for multiple switching circuits.
- Monostable operation returns the contacts to their normal state when the coil is de-energised.
- Industrial temperature capability supports use in demanding electrical installations.
Key Features
- Finder 55 Series miniature general-purpose relay.
- 55.34 four-pole plug-in relay type.
- 140 V DC nominal coil.
- DC electromagnetic operation.
- Four changeover contacts (4 CO).
- Four-pole double-throw (4PDT) configuration.
- 7 A rated contact current.
- 15 A maximum peak contact current under specified conditions.
- 250 V AC rated contact voltage.
- 1,750 VA AC1 rated resistive switching capacity.
- Silver-nickel (AgNi) contact material.
- Lockable test button and mechanical indicator.
- Plug-in connection for compatible relay sockets.
- Standard industrial relay construction.
- Monostable switching mechanism.
Technical verification note: The 140 V DC coil, 4PDT contact arrangement, 7 A contact rating, AgNi contacts and physical dimensions are supported by an exact-part product listing. Other figures identified as family ratings should be checked against the current Finder datasheet for the precise application. The coil resistance and permissible operating voltage range for this particular 140 V DC variant should also be confirmed before installation.
Versatile Four-Pole Changeover Switching
The Finder 55.34.9.140.0040 incorporates four changeover contacts, providing four separate switching paths operated by one electromagnetic coil. Each pole includes a common terminal, a normally closed terminal and a normally open terminal.
When the 140 V DC coil is energised, the relay changes the state of all four contact sets. When the coil supply is removed, the contacts return to their normal positions. This arrangement is useful where a single control signal must switch multiple auxiliary circuits simultaneously.
The silver-nickel contact material supports general-purpose industrial switching. The relay's 7 A contact rating applies under specified load conditions; inductive loads, DC switching and frequent operation may require additional derating or contact protection.
A distinguishing feature of the Finder 55.34.9.140.0040 is its 0040 option configuration, which includes a lockable test button and mechanical indicator. The mechanical indicator provides visual feedback of the relay's operating state, assisting technicians during commissioning and troubleshooting.
The test button can be used to actuate the relay contacts manually. Finder's test-button design also provides a locking function when configured according to the manufacturer's instructions. Manual testing must be carried out only where it is safe to operate the connected circuits, as the test button can change the state of live equipment independently of the electrical coil signal.
The relay's plug-in construction also supports convenient replacement using a compatible Finder 94 Series socket, reducing the need to disturb permanent panel wiring during maintenance.
Typical Applications
- Industrial automation and control panels.
- Machinery auxiliary control circuits.
- Multi-circuit electrical switching.
- Industrial signalling and indication systems.
- Process control equipment.
- Electrical interlocking circuits.
- Building automation and control systems.
- Alarm and monitoring equipment.
- OEM industrial electrical assemblies.
- Control panels requiring manual relay testing and mechanical indication.
- Plug-in relay installations requiring four changeover contacts.
- Equipment with a compatible 140 V DC control supply.
