Finder 7H.51.8.110.0400 – 7H Series Panel Heaters

Why Choose the Finder 7H.51.8.110.0400 Fan-Assisted Panel Heater?

The Finder 7H.51.8.110.0400 is a compact, high-performance 400 W fan-assisted electrical enclosure heater designed to prevent condensation and maintain suitable internal temperatures in industrial control cabinets, switchboards and automation enclosures. Part of the Finder 7H Series, this heater combines a self-regulating PTC heating element with an integrated fan to provide effective heat distribution throughout an electrical cabinet.

Operating from a nominal 110 V AC supply at 50/60 Hz, the Finder 7H.51.8.110.0400 provides up to 400 W heating power, with a nominal current of 3 A. Its self-regulating Positive Temperature Coefficient (PTC) technology automatically adjusts the heating element's electrical resistance as its temperature increases, helping limit overheating and supporting efficient temperature maintenance.

Featuring IP20 protection, an operating temperature range of −40 to +50 °C, a compact finned housing and 35 mm DIN rail mounting, this fan-assisted heater is ideal for electrical enclosures requiring dependable anti-condensation heating. Its integrated fan improves warm-air circulation, helping protect sensitive electrical and electronic components against moisture-related problems.

Key Advantages

• 400 W maximum heating power for effective electrical enclosure temperature management.
• 110 V AC operation at 50/60 Hz for compatible industrial power supplies.
• Self-regulating PTC heating element automatically adjusts heat generation according to element temperature.
• Integrated fan promotes even heat distribution throughout the enclosure.
• Helps prevent condensation and moisture accumulation inside electrical cabinets.
• Compact finned construction provides efficient heat transfer.
• 35 mm DIN rail mounting enables convenient installation in industrial control panels.
• IP20 protection suitable for installation within appropriately protected enclosures.
• −40 to +50 °C operating temperature range supports demanding industrial environments.
• Separate heater and fan supply connections provide flexible temperature control arrangements.
• Can be combined with a compatible thermostat for automatic enclosure heating control.
• Designed for industrial automation, power distribution and infrastructure applications.

Key Features

• Finder 7H.51 Series electrical enclosure heater.
• Fan-assisted PTC heating technology.
• 400 W maximum heating power.
• 110 V AC nominal supply voltage.
• 50/60 Hz AC supply frequency.
• 88–121 V AC operating voltage range.
• 3 A nominal current.
• Self-regulating PTC resistor for controlled heat generation.
• Integrated forced-air fan for improved cabinet heat distribution.
• 18 CFM nominal fan airflow, approximately 30.6 m³/h.
• IP20 ingress protection.
• 35 mm DIN rail mounting according to EN 60715.
• Separate electrical connections for the heating element and fan.
• Suitable for integration with external thermostatic controls.
• 10 A recommended fuse rating according to Finder installation instructions.
• Compact design suitable for electrical control cabinet installations.

Self-Regulating PTC Heating with Integrated Fan Assistance

The Finder 7H.51.8.110.0400 uses Positive Temperature Coefficient heating technology to provide controlled heat generation inside electrical enclosures. As the PTC heating element warms up, its electrical resistance increases, naturally reducing the current drawn and helping regulate its operating temperature. This technology is particularly suitable for cabinet heating applications requiring dependable operation and reduced risk of uncontrolled temperature rise.

Unlike passive enclosure heaters that rely primarily on natural convection, the integrated fan actively circulates warm air around the cabinet. This helps distribute heat more evenly and reduces cold spots where moisture may condense. The fan-assisted design is especially useful in larger or densely populated control panels containing sensitive electronic equipment.

The heater features separate electrical supply connections for the heating element and fan, allowing flexible control arrangements. For example, an external thermostat can switch the heating element according to cabinet temperature while the fan is controlled separately. Continuous fan operation should be considered carefully because it can reduce fan service life.

Reliable Condensation Prevention for Electrical Enclosures

Condensation inside electrical cabinets can lead to corrosion, insulation deterioration, electrical faults and premature component failure. The Finder 7H.51.8.110.0400 helps minimise these risks by maintaining a suitable internal cabinet temperature and promoting air circulation around installed equipment.

Its 400 W maximum heating capacity makes it suitable for applications requiring substantial anti-condensation heating. When paired with an appropriate thermostat, the heater can operate automatically as temperatures fall towards a selected setpoint, helping maintain suitable conditions without unnecessary continuous heating.

With IP20 protection and 35 mm DIN rail mounting, the unit is intended for installation inside a suitable electrical enclosure. Correct heater selection should account for enclosure dimensions, insulation, ambient temperature, required internal temperature and installation clearances.

Typical Applications

• Industrial electrical control cabinets.
• PLC and automation control panels.
• Electrical distribution and switchgear enclosures.
• Motor control centres and variable frequency drive cabinets.
• Outdoor electrical cabinets requiring internal anti-condensation heating.
• Telecommunications and infrastructure equipment enclosures.
• Renewable energy and power conversion cabinets.
• Industrial machinery and manufacturing control systems.
• Process control and instrumentation cabinets.
• Road and tunnel lighting control panels.
• Crane and hoist electrical control enclosures.
• OEM industrial cabinet heating and thermal management systems.