Why Choose the Finder 78.25.1.230.1202 12 V DC DIN Rail Power Supply?
The Finder 78.25.1.230.1202 is a compact, high-efficiency 12 V DC switched-mode power supply (SMPS) designed to provide reliable and regulated electrical power for industrial automation, building control and electronic equipment. Part of the Finder Series 78, this modular power supply delivers up to 25 W output power with a rated output current of 2 A under specified operating conditions.
Designed for installation in electrical distribution boards and industrial control cabinets, the Finder 78.25.1.230.1202 converts a wide range of AC or DC input voltages into a stable 12 V DC output. Its nominal 110–240 V AC or 220 V DC input makes it suitable for a variety of industrial and commercial electrical systems.
With a slim 35 mm wide modular housing, efficient switched-mode technology and 35 mm DIN rail mounting, this power supply offers an effective solution for installations where space, efficiency and dependable operation are important. Its 88% efficiency at 230 V AC helps minimise unnecessary energy loss and heat generation.
The Finder 78.25.1.230.1202 also incorporates automatic short-circuit recovery, internal thermal protection and overvoltage protection. These features, together with its SELV-compatible design and low standby consumption, make it an excellent choice for powering compatible sensors, controllers, electronic interfaces and low-voltage automation equipment.
Key Advantages
- 12 V DC regulated output for compatible industrial and electronic equipment.
- 25 W rated output power for low-voltage automation applications.
- 2 A rated output current under specified operating conditions.
- 4 A peak output current for 3 ms to accommodate brief transient demands.
- 110–240 V AC nominal input for standard electrical supplies.
- 220 V DC nominal input for compatible DC supply systems.
- 100–265 V AC operating range for flexible mains-powered installations.
- 140–370 V DC operating range for compatible DC input applications.
- 88% efficiency at 230 V AC to reduce energy loss.
- Low standby consumption of no more than 0.35 W.
- 35 mm wide housing occupies approximately two modular DIN rail positions.
- 35 mm DIN rail mounting for straightforward installation.
- Automatic short-circuit recovery helps restore operation after a fault is cleared.
- Internal thermal protection with output shutdown under excessive temperature conditions.
- Overvoltage protection provides additional resilience against electrical disturbances.
- SELV-compatible output for appropriate extra-low-voltage circuits.
- Parallel redundancy and series connection options when implemented according to Finder's instructions.
- Suitable for industrial controls, electronic interfaces, sensors, access systems and building automation.
Key Features
- Finder Series 78 switched-mode power supply.
- Product type: Modular DIN rail AC/DC power supply.
- Output voltage: 12 V DC.
- Rated output current: 2 A.
- Rated output power: 25 W.
- Peak output current: 4 A for 3 ms.
- Nominal AC input: 110–240 V AC.
- Nominal DC input: 220 V DC, non-polarised.
- AC input operating range: 100–265 V AC.
- DC input operating range: 140–370 V DC.
- Input frequency: 50/60 Hz.
- Output type: Regulated 12 V DC.
- Typical efficiency: 88% at 230 V AC.
- Standby consumption: ≤ 0.35 W.
- Output voltage variation: Less than 1% from no load to full load.
- Output ripple: Less than 200 mV at full load under specified conditions.
- Input-to-output dielectric strength: 3000 V AC.
- Short-circuit protection: Automatic recovery.
- Thermal protection: Internal shutdown, with power-off reset.
- Overvoltage protection: Integrated.
- Housing width: 35 mm.
- Mounting: 35 mm DIN rail.
- Protection rating: IP20.
- Operating ambient temperature: −20 to +70 °C, subject to output derating.
Technical Specifications
- Manufacturer: Finder
- Series: 78
- Manufacturer part number: 78.25.1.230.1202
- Product type: DIN rail switched-mode power supply
- Power conversion: AC/DC input to DC output
- Power supply topology: Switched-mode, flyback
- Number of outputs: 1
- Rated output voltage: 12 V DC
- Rated output current: 2 A at −20 to +50 °C with 230 V AC input
- Output current at +70 °C: 1.6 A under specified conditions
- Rated output power: 25 W
- Peak output current: 4 A for 3 ms
- Output voltage variation: < 1%
- Output voltage ripple: < 200 mV at full load
- Nominal AC input: 110–240 V AC
- AC input operating range: 100–265 V AC
- Nominal DC input: 220 V DC, non-polarised
- DC input operating range: 140–370 V DC
- AC input frequency: 50/60 Hz
- Maximum apparent power consumption: 58 VA
- Standby power consumption: ≤ 0.35 W at 230 V AC
- Power factor: Approximately 0.48
- Maximum input current: 0.55 A at 110 V AC
- Maximum inrush current: 15 A peak for 3 ms at 250 V AC
- Efficiency: 88% at 230 V AC
- Input-to-output dielectric strength: 3000 V AC
- Start-up delay: Approximately 1 s
- Mean time to failure (MTTF): Greater than 400,000 hours under specified conditions
- Protection functions: Short-circuit, thermal and overvoltage protection
- Safety application: SELV-compatible systems
- Operating ambient temperature: −20 to +70 °C with applicable derating
- Protection rating: IP20
- Housing width: 35 mm
- Housing height: Approximately 84 mm
- Housing depth: Approximately 56.5–61 mm, depending on measurement reference
- Mounting type: 35 mm DIN rail (EN 60715)
- Electrical connections: Screw terminals
- EAN / GTIN: 8012823464992
- Country of origin: Italy
Reliable 12 V DC Power for Industrial Automation
The Finder 78.25.1.230.1202 provides a regulated 12 V DC supply for compatible industrial and commercial electronic equipment. It is particularly useful in control systems that require a dedicated low-voltage DC power source derived from a standard AC mains supply or a compatible high-voltage DC source.
Its 25 W output capability and 2 A rated current make it suitable for a variety of low-power control and interface applications. Examples include sensors, electronic control modules, access-control equipment and compatible building automation devices.
The power supply also provides a 4 A peak current capability for 3 ms. This can help accommodate very brief transient demands during equipment activation. However, the peak capability must not be treated as a continuous output rating, and connected equipment must remain within the manufacturer's current and power limits.
The specified output voltage variation of less than 1% from no load to full load helps maintain a stable supply for sensitive electronic circuits. Low output ripple further supports dependable operation of compatible control and monitoring equipment.
With both AC and DC input compatibility, the Finder 78.25.1.230.1202 provides installation flexibility. Its 110–240 V AC nominal input suits standard mains supplies, while its 220 V DC nominal input can be used in compatible DC distribution systems.
Efficient Switched-Mode Technology and Integrated Protection
The Finder 78.25.1.230.1202 uses switched-mode power conversion to transform its input supply into regulated 12 V DC power. Its flyback-based design enables efficient operation within a compact modular enclosure.
With a specified efficiency of approximately 88% at 230 V AC input, the unit helps minimise energy loss compared with less efficient power conversion arrangements. Its standby consumption of no more than 0.35 W is also beneficial for systems that remain energised for extended periods.
The integrated short-circuit protection provides automatic recovery when the output fault has been removed. This helps protect the power supply during abnormal load conditions without requiring routine replacement of an external component solely to reset the output.
Internal thermal protection shuts down the output if the device reaches an excessive internal temperature. The manufacturer's instructions specify a power-off reset following thermal shutdown. The unit also includes overvoltage protection to help protect against electrical disturbances.
The power supply's 3000 V AC input-to-output dielectric strength supports electrical separation between the supply input and low-voltage output. The device is designed for suitable SELV applications when installed according to the manufacturer's instructions and applicable electrical standards.
Space-Saving DIN Rail Installation and Flexible System Design
The Finder 78.25.1.230.1202 is designed for mounting on a standard 35 mm DIN rail within an appropriate electrical cabinet. Its 35 mm housing width occupies approximately two standard modular positions, making it convenient for compact control and distribution boards.
The power supply includes screw terminal connections for the input and output circuits. Installation should be performed by suitably qualified personnel, with appropriate upstream protection, cable selection and separation between mains-voltage and extra-low-voltage wiring.
At an ambient temperature of up to +50 °C under the specified 230 V AC input conditions, the device provides its rated 2 A output current. At higher temperatures, the permissible output current is reduced; Finder specifies 1.6 A at +70 °C under the stated conditions.
For systems requiring increased availability, Finder supports parallel operation for automatic redundancy using appropriate OR diodes. Series connection and dual-polarity arrangements are also permissible when implemented according to the manufacturer's wiring instructions. These arrangements must not be confused with unrestricted direct paralleling to increase output current.
Correct load selection remains essential. The combined continuous current consumption, start-up requirements and transient demands of all connected devices must remain within the power supply's specified ratings.
Typical Applications
- Industrial automation control panels.
- 12 V DC electronic control systems.
- Industrial sensors and monitoring devices.
- Building automation and management systems.
- Access-control and automatic gate systems.
- Video door entry and intercom equipment.
- Remote-controlled doors and compatible actuators.
- Low-voltage electronic interface equipment.
- Industrial process monitoring systems.
- Compatible 12 V DC LED lighting equipment.
- OEM machinery and embedded electronic controls.
- Low-power DC motors and pumps within the applicable ratings.
- Control cabinet auxiliary power supplies.
- Redundant power arrangements using appropriate OR diodes.
- Compact electrical distribution and automation cabinets.
