STEGO HGL 046 Enclosure Heater 400 W 04641.0-00

04641.0-00 is the STEGO HGL 046 enclosure fan heater in its 400 W, 230 V version. It is a resistance heater with a fan, measures 222 x 85 x 100 mm, weighs 1,400 g, keeps its surface under +75 C and clips onto a 35 mm DIN rail.

A 400 W fan heater for fast, even warming of an enclosure

A fan heater circulates the enclosure air across a heating element, so cold spots are removed faster than with a heater that relies on natural convection alone. The HGL 046 is the higher-output option in the STEGO range of small enclosure heaters, and it is meant to keep electrical and electronic equipment above the dew point and inside its temperature range.

The datasheet lists an overheating cut-out that responds if the fan fails and resets automatically. Connection is through an internal terminal for conductors up to 1.5 mm2 with strain relief, and the casing carries protection class I with IP20, so it belongs inside a closed enclosure.

Key features as printed in the datasheet

• Resistance heater with fan, 400 W at 230 V.
• Surface temperature under +75 C.
• Overheat cut-out on fan failure, automatic reset.
• Internal terminal for 1.5 mm2 with strain relief.
• Clip for 35 mm DIN rail.
• Operating temperature -45 to +70 C; protection class I, IP20.

Technical specification

Technical data, as printed on the STEGO datasheet

HGL 046 variants listed by STEGO

Selection and ordering guide

STEGO describes the fan as maximising the convection effect of the resistance heater, which is the reason to pick a fan unit over a passive one when the enclosure is deep or crowded with equipment.

Choose 04641.0-00 when an enclosure needs more heat than a 250 W unit gives and a fan is acceptable. The lower 250 W version, 04640.0-00, is shorter at 182 mm and weighs 1,100 g, so check the free space on the DIN rail before ordering.

The 120 V versions (04640.9-00 and 04641.9-00) are different articles; do not use them on a 230 V supply. A heater of this size is normally paired with an external thermostat such as the KTO 111 (11100.0-00), wired in the supply line.

Installation and operation notes

Mount the heater on the 35 mm DIN rail with the clip and keep the air inlet and outlet free of cables. The STEGO connection example shows earth, L and N, with the KTO 111 thermostat placed in the supply line to switch the heater.

The unit is IP20, so it has to sit inside a closed enclosure that provides the required protection. The datasheet states that the user must check suitability for the application; confirm all values against the current datasheet.

Applications in Oman and the GCC

Control cabinets, switchgear and telecom enclosures in cold or humid locations where condensation would damage equipment, such as outdoor kiosks, pump stations and water-treatment cabinets.

On Gulf sites the heater is mainly relevant for night-time dew in desert cabinets and for cold-store and washdown areas where the enclosure interior can fall below the dew point.

Compatible accessories and related items

Related STEGO items: the KTO 111 thermostat (11100.0-00), the ETR 011 electronic thermostat (01131.0-00), the MFR 012-1 hygrostat (01220.0-00) and the LP 165 loop heater (16503.0-00).

Selection and maintenance notes

A fan heater is chosen where an enclosure must be warmed quickly and evenly, for example a large cabinet or one with many components that block natural convection. In the region, heaters are used mainly against condensation, which forms in humid coastal areas when cabinets cool at night, or when air conditioning cycles off. A thermostat or hygrostat should control the heater so it runs only when needed, which saves energy and avoids adding heat during hot days.

Mount the heater low in the enclosure with the air outlet free, and keep cables and heat-sensitive components away from the warm air stream. Check the fan for dust during routine maintenance, since a blocked fan reduces the heat output and can cause local hot spots.

Where several enclosures share one design, the same heater and controller combination can be repeated across the site, which keeps spare parts simple for maintenance teams.

Information to send with an enquiry

• Enclosure size and installation location
• Supply voltage and heater power
• Thermostat or hygrostat needed
• Quantity

Frequently asked questions

What is the heating capacity of 04641.0-00?

400 W at 230 V.

What happens if the fan fails?

The overheat cut-out responds and resets automatically, according to the datasheet.

How is it mounted?

With a clip on a 35 mm DIN rail.

Is there a 120 V version?

Yes, 04641.9-00 at 120 V and 400 W is listed on the STEGO datasheet.

Does Seven Star LLC act as a STEGO distributor?

No. Seven Star LLC is not a STEGO distributor; it is an independent Muscat-based supplier that quotes STEGO products on request.

Documents and quotation

The official STEGO datasheet for 04641.0-00 is hosted on this page for download. Seven Star LLC is an independent supplier in Muscat; send your quantity and delivery location through the quotation form and we will quote this item. Please confirm the exact order code, ratings and approvals against the document before ordering. More related products: product category.