Wiegmann WCR027350120, 350 Watt, 120VAC Heater With Adjustable Thermostat 

Designed to protect sensitive mechanical, electrical, and electronic equipment from the harmful effects of condensation, corrosion, and low temperatures. Thermostatically controlled fan-driven heater units maintain a stable temperature with enclosure so critical components can perform more reliably over a longer period of time.

Positive Temperature Coefficient (PTC)
semiconductor heating element, self regulating and temperature limiting
Adjustable thermostat
LED lamp for optical indication of function
Durable, non-metallic plastic housing,
UL94-VO
Connection: 3 - pole terminal, max.
AWG 14
Easily installed by clip-mounting on
35mm DIN rail