Pfannenberg Heaters PRH 020-M 20W 110-250PRH 020-M 20W

Why Choose the Pfannenberg PRH 020-M 20W Mini-Radiant Heater?

The Pfannenberg PRH 020-M, article number 17000205317, is a compact 20 W mini-radiant enclosure heater designed to help prevent excessively low temperatures and condensation inside electrical and electronic enclosures. As part of the Pfannenberg PRH Mini series, it is particularly suitable for small housings and for targeted heating of sensitive areas within industrial control equipment.

The PRH 020-M combines a robust, fanless construction with an IP54 protection rating for its intended use. Its black anodised aluminium profile provides a durable housing, while integrated snap fastening enables straightforward installation onto 35 mm profile rails according to EN 60715. Electrical connection is provided through a factory-fitted 300 mm connecting cable.

With a heating performance of 20 W at +20 °C ambient temperature, a nominal supply of 230 V AC, 50/60 Hz and a functional voltage range of 110–250 V AC, 50/60 Hz, the PRH 020-M provides flexible low-power heating for industrial enclosures. Its wide −40 to +70 °C operating temperature range makes it suitable for demanding electrical and automation applications.

Key Advantages

• Compact 20 W mini-radiant heater for electrical and electronic enclosures.
• Helps prevent low temperatures and condensation formation inside control cabinets.
• Wide 110–250 V AC functional voltage range provides flexible supply compatibility.
• Integrated snap fastening for 35 mm DIN rail simplifies installation.
• IP54 protection for the intended purpose of use.
• Wide −40 to +70 °C operating temperature range.
• Robust fanless construction supports long service life and low maintenance requirements.
• Compact design is particularly suitable for small enclosures and localised heating of sensitive components.

Key Features

• Pfannenberg PRH 020-M mini-radiant enclosure heater.
• 20 W heating performance at an ambient temperature of +20 °C.
• 230 V AC nominal voltage with ±10% tolerance.
• 110–250 V AC, 50/60 Hz functional range.
• 1.1 A maximum starting current.
• 115 °C maximum surface temperature.
• −40 to +70 °C operating temperature range.
• −40 to +70 °C storage temperature range.
• IP54 protection rating for intended use.
• Protection class II.
• Black anodised aluminium profile construction.
• Integrated snap mounting for 35 mm profile rail according to EN 60715.
• Factory-fitted 300 mm connecting cable.
• Fanless construction for robust, low-maintenance operation.

Reliable Condensation Protection for Electrical Enclosures

Enclosure heaters such as the Pfannenberg PRH 020-M provide controlled localised heat to help prevent excessively low internal temperatures and the formation of condensation. Maintaining suitable conditions inside a cabinet can help protect electrical contacts, electronic components and other sensitive equipment from moisture-related corrosion and reliability problems.

The PRH Mini series is designed specifically for smaller housings and isolated areas where only modest heating performance is required. The PRH 020-M combines 20 W heating performance with a compact, fanless construction, wide operating temperature range and integrated DIN rail mounting, making it a practical thermal management component for industrial automation and control systems.

Typical Applications

• Small industrial electrical control cabinets.
• Automation and PLC enclosures.
• Terminal and junction enclosures.
• Instrumentation and monitoring equipment.
• Industrial machinery control systems.
• Localised heating of temperature-sensitive components.
• Condensation prevention inside electrical enclosures.
• OEM machinery and industrial automation equipment.