Finder 39.01.0.125.0073 – 125 V AC/DC 6 A MasterBASIC ATEX Interface Relay Module
The Finder 39.01.0.125.0073 is a compact 6 A DIN rail interface relay module designed for industrial automation, PLC interfacing and electrical control panels. Part of the Finder 39 Series MasterINTERFACE range, this MasterBASIC module combines a removable electromechanical relay with a slimline socket, providing a convenient solution for switching and isolating compatible control circuits.
Featuring a 110–125 V AC/DC control input and one changeover contact (1CO / SPDT), the Finder 39.01.0.125.0073 enables higher-voltage control signals to operate separate electrical loads. Its 6 A rated contacts, silver-nickel contact material and integrated LED indication make it suitable for industrial control, monitoring and signal changeover applications.
This particular version belongs to Finder's MasterBASIC ATEX / HazLoc range, intended for appropriately assessed hazardous-location installations. With a housing width of just 6.2 mm, push-in spring terminals and standard DIN rail mounting, it is an excellent choice for electrical contractors, panel builders and automation engineers seeking compact, reliable relay interfacing.
Key Advantages
- 6 A industrial interface relay for reliable electrical switching.
- 110–125 V AC/DC input supports compatible higher-voltage control circuits.
- One changeover contact (1CO / SPDT) provides flexible switching arrangements.
- ATEX / HazLoc designated version for appropriately certified installations.
- Ultra-slim 6.2 mm housing saves space in control cabinets.
- Push-in spring terminals simplify wiring and panel assembly.
- Integrated LED indication supports commissioning and troubleshooting.
- Silver-nickel (AgNi) contacts provide dependable switching performance.
- 6 A resistive contact rating for compatible electrical loads.
- Removable electromechanical relay supports convenient maintenance.
- Approximately 5 ms operate time enables responsive control.
- Approximately 6 ms release time provides predictable switching behaviour.
- −40 to +70 °C operating temperature range.
- 35 mm DIN rail mounting for professional panel installations.
- IP20 protection rating for installation inside suitable electrical enclosures.
Key Features
- Finder 39 Series MasterINTERFACE module.
- MasterBASIC electromechanical relay configuration.
- ATEX / Class I, Division 2 designated variant.
- 110–125 V AC/DC control input range.
- 125 V AC/DC nominal input designation.
- One changeover contact (1CO).
- SPDT / Form C contact arrangement.
- 6 A rated contact current.
- 250 V AC contact rating.
- 400 V AC maximum switching voltage.
- Silver-nickel contact material.
- Non-latching electromagnetic operation.
- Approximately 5.6 mA rated input current.
- 22.3 kΩ relay coil resistance.
- 88 V AC/DC must-operate voltage.
- 12.5 V AC/DC must-release voltage.
- 5 ms operate time.
- 6 ms release time.
- Integrated LED operating indication.
- Push-in spring terminal connections.
- Removable Finder 34.51 relay.
- Finder 93.60.0.125.7 interface socket.
- 6.2 mm module width.
- 35 mm DIN rail mounting.
- IP20 protection rating.
How the Finder 39.01.0.125.0073 Interface Relay Works
The Finder 39.01.0.125.0073 provides an electrical interface between a compatible 110–125 V AC/DC control signal and a separate switched circuit. The module combines a Finder 34.51 electromechanical relay with a dedicated 93.60 interface socket, allowing the control input to operate a single changeover contact.
In its normal, de-energised condition, the common contact is connected to the normally closed (NC) terminal. When the appropriate control voltage is applied, the relay energises and transfers the common contact to the normally open (NO) terminal. Removing the control voltage causes the contact to return to its normal position.
This SPDT switching arrangement is particularly useful where a higher-voltage control signal must operate an electrically separate circuit. Typical examples include PLC interfacing, alarm signalling, control circuit changeover and switching of compatible auxiliary equipment.
The module is identified by its 125 V AC/DC input designation, while Finder's module selection information specifies an input range of 110–125 V AC/DC. The assembled module incorporates input circuitry appropriate to its designated supply range; its internal removable relay should not be confused with a standalone relay having a 125 V coil.
The 6 A silver-nickel contacts provide reliable switching of compatible electrical loads. For resistive applications, the relay is specified for 6 A at 250 V AC and 6 A at 24 V DC. Its maximum switching voltages must not be interpreted as permitting the full 6 A current at every voltage.
The module uses push-in spring terminals for convenient panel wiring. These connections are particularly beneficial in installations containing multiple interface relays, where consistent wiring and efficient assembly are important.
Its integrated LED indicator helps maintenance engineers observe the control input status during testing and fault-finding. The relay operates in approximately 5 ms and releases in approximately 6 ms, supporting responsive control applications.
With a width of just 6.2 mm, the Finder 39.01.0.125.0073 enables high-density installation on a standard 35 mm DIN rail. The removable relay arrangement also supports servicing, provided the replacement component matches Finder's specified configuration and the installation's approval requirements.
ATEX and Hazardous-Location Installation Considerations
The Finder 39.01.0.125.0073 belongs to Finder's MasterBASIC ATEX / HazLoc range. This designation identifies a version intended for consideration in electrical installations where hazardous-location equipment requirements may apply.
However, the product designation alone does not establish suitability for every explosive atmosphere. The exact ATEX marking, Class I, Division 2 approval conditions, equipment category, permitted ambient temperature and enclosure requirements must be checked against the current manufacturer's certification documents.
Its IP20 protection rating is not an explosion-protection rating. The module must be installed in a suitable enclosure and incorporated into a correctly assessed electrical system, following the relevant hazardous-area standards and installation instructions.
For hazardous-location applications, any replacement relay, socket or accessory must also be checked against the approved assembly configuration. A mechanically compatible component is not necessarily an approved substitute.
Typical Applications
- Industrial PLC output interfacing.
- Electrical automation control cabinets.
- Process control and instrumentation systems.
- Control circuits operating at 110–125 V AC/DC.
- Hazardous-location electrical installations, subject to certification.
- Class I, Division 2 control systems, where approved.
- Industrial alarm and indication circuits.
- Machine control and monitoring panels.
- Electrical signal changeover applications.
- Factory automation equipment.
- Control of appropriately rated auxiliary loads.
- Remote monitoring and control interfaces.
- DIN rail-mounted relay assemblies.
- Industrial electrical panel manufacturing.
- Maintenance and upgrades of compatible automation systems.
