Enclosure Thermal & Cooling Sizer (Rittal / IEC 60890)

Standard-compliant sizing for Floor-standing (VX25), Wall-mount (AX/KX), and Outdoor (CS Toptec) enclosures.

1. Enclosure Model & Mounting Selection

Rittal Series & Typical IP Rating

Preset Dimensions or Custom (H x W x D mm)

Mounting / Installation Type (IEC 60890 Area Factor)

Heat Transfer Coefficient k [W/(m²·K)]

Installation Category

Max Ambient Temp T_amb (°C)

Target Internal Temp T_int (°C)

Design Safety Margin (%)

Check items applicable to your skid or cabinet. Edit power values directly.

Select	Equipment Category / Description	Unit Loss (W)	Qty	Subtotal (W)
	Industrial Server / IPC (Rack-mount, typical 600W system)			350 W
	PLC CPU + Main Rack + Communication Cards			45 W
	Remote I/O (RIO) Head + 8-16 I/O Slice Modules			50 W
	Variable Frequency Drive (VFD) - 1.2 kW to 3 kW (loss ~4% rating)			130 W
	Online UPS Losses & Charger (700W / 1kVA system ~12% loss)			85 W
	24V DC Switch Mode Power Supply (20A / 480W, 90% eff.)			48 W
	Managed Network Switch (Fiber + RJ45)			25 W
	Aux Relays, Contactors, Pilot Lights & Terminal Blocks			0 W

0.00 m²

Effective Area (A_eff)

0 W

Internal Heat (Q_int)

0 W

Surface Convection (Q_s)

0 W

Net Required Cooling

0 W

With Safety Margin