Why Choose the Finder 7F.21.8.230.4250.0 Reverse Flow Filter Fan?
The Finder 7F.21.8.230.4250.0 is a high-performance reverse flow filter fan designed for reliable ventilation and temperature management in industrial electrical cabinets, control panels and switchboards. As part of the Finder 7F Series, this Size 4 filter fan provides powered airflow to help protect heat-sensitive electrical and electronic components from excessive operating temperatures.
Featuring a 230 V AC supply and a nominal free-air flow rate of 250 m³/h at 50 Hz, the Finder 7F.21 filter fan configuration is specifically designed for reverse airflow applications. Its integrated filtration system helps reduce the entry of airborne dust and contaminants, while its compact enclosure-mounted construction simplifies installation and maintenance.
With IP54 ingress protection, a RAL 7035 light grey housing and a replaceable synthetic fibre filter mat, the 7F.21.8.230.4250.0 provides an effective ventilation solution for industrial automation cabinets, electrical distribution systems and machine control enclosures. Its Size 4 format supports straightforward integration into compatible cabinet ventilation arrangements.
Key Advantages
- Industrial reverse flow filter fan designed for electrical enclosure cooling.
- 250 m³/h free-air flow rate at 50 Hz supports effective cabinet ventilation.
- 230 V AC rated supply suitable for industrial electrical systems.
- IP54 ingress protection helps protect enclosed equipment against dust and water splashes.
- Size 4 enclosure mounting configuration for compatible ventilation systems.
- Reverse airflow arrangement provides flexibility in cabinet ventilation design.
- G3 synthetic fibre filter mat helps reduce airborne dust entering the enclosure.
- Replaceable filtration medium simplifies routine maintenance.
- Compact, low-profile construction reduces space requirements.
- RAL 7035 light grey finish complements standard industrial electrical cabinets.
- Designed for dependable operation in industrial automation and electrical distribution applications.
Key Features
- Finder 7F Series electrical enclosure filter fan.
- 7F.21 reverse flow ventilation configuration.
- Size 4 filter fan design.
- 230 V AC nominal operating voltage.
- 50/60 Hz supply frequency.
- 250/295 m³/h free-air flow rate at 50/60 Hz.
- 195/228 m³/h airflow at 50/60 Hz with a compatible exhaust filter installed.
- 46/50 W rated power at 50/60 Hz.
- 0.20/0.22 A current consumption at 50/60 Hz.
- IP54 protection according to EN 60529.
- NEMA Type 12 enclosure protection classification.
- G3 filter mat according to EN 779.
- 56 dB(A) nominal acoustic noise level.
- 50,000-hour nominal fan life at 40 °C.
- Flame-retardant plastic housing according to UL94 V-0.
- Push-in electrical terminals for convenient wiring.
- Snap-in mounting arrangement for electrical enclosure installation.
Technical Specifications
- Manufacturer: Finder
- Series: 7F Series
- Model: 7F.21.8.230.4250.0
- Product type: Reverse flow electrical enclosure filter fan
- Fan configuration: Reverse flow
- Size: 4
- Rated supply voltage: 230 V AC
- Supply frequency: 50/60 Hz
- Operating voltage range: 0.8–1.1 × nominal voltage
- Free-air flow rate: 250/295 m³/h at 50/60 Hz
- Airflow with exhaust filter: 195/228 m³/h at 50/60 Hz
- Rated power: 46/50 W at 50/60 Hz
- Current consumption: 0.20/0.22 A at 50/60 Hz
- Noise level: 56 dB(A)
- Nominal service life: 50,000 hours at 40 °C
- Protection rating: IP54
- NEMA classification: Type 12
- Filter classification: G3 according to EN 779
- Filter material: Synthetic fibre
- Filter efficiency: 80–90% according to EN 779 G3 classification
- Filter material temperature resistance: Up to +100 °C
- Housing material: Flame-retardant plastic, UL94 V-0
- Housing colour: Light grey, RAL 7035
- Ambient operating temperature: −15 to +55 °C
- Mounting type: Snap-in enclosure wall mounting
- Nominal mounting cut-out: 223 × 223 mm
- Front dimensions (H × W): 255 × 255 mm
- Electrical connection: Push-in terminals
- Conductor cross-section: 0.7–2.5 mm²
- Compatible ventilation accessories: Finder 7F Series Size 4 exhaust filters
Reliable Reverse Flow Ventilation for Electrical Cabinets
The Finder 7F.21.8.230.4250.0 is designed to support controlled air circulation in electrical enclosures containing heat-generating equipment. Its reverse flow configuration allows the fan to operate with the airflow direction opposite to that of standard Finder 7F.20 filter fans, providing additional flexibility when designing enclosure ventilation systems.
With a nominal free-air capacity of 250 m³/h at 50 Hz and 295 m³/h at 60 Hz, the fan can assist with removing excess heat from cabinets containing PLCs, power supplies, contactors, motor controllers and variable frequency drives. When combined with an appropriately sized exhaust filter, the airflow is approximately 195/228 m³/h at 50/60 Hz under the manufacturer's stated test conditions.
The integrated G3 synthetic fibre filter mat helps capture coarse airborne particles, while the IP54-rated construction supports installation in suitable industrial electrical enclosures. The replaceable filter and snap-in mounting system simplify servicing and help maintain dependable ventilation performance over time.
Typical Applications
- Industrial electrical control cabinets and switchboards.
- PLC and automation control enclosures.
- Variable frequency drive and motor control panels.
- Electrical distribution and power management cabinets.
- Industrial machinery and manufacturing equipment.
- Packaging and production automation systems.
- Process control and instrumentation enclosures.
- Telecommunications and infrastructure equipment cabinets.
- OEM machine-building and industrial control systems.
- Electrical enclosure cooling and reverse airflow ventilation arrangements.
