STJH-EC-FAN-FILTER-UNIT-400X400-3CMM

STJH 400 x 400 mm Compact EC Fan Filter Unit

A compact 3 m³/min HEPA supply module for equipment housings with limited roof space.

400 mm square footprint
Approximately 3 m³/min airflow
Local variable-speed control

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Product Introduction

This square unit combines a brushless fan, inlet prefilter and downstream HEPA element in a compact stainless assembly. The 400 mm mounting footprint suits narrow equipment tops; an external terminal box requires additional rear clearance. A local speed control adjusts delivery as the enclosure airflow path is balanced.

Key Features

Compact mounting envelope

The small casing leaves more space around the module for machine brackets and service access.

Protected final filter

An inlet prefilter intercepts coarse particles before air reaches the fan and final filtration stage.

Accessible operating controls

The switch and speed adjustment support local setup without a separate building-wide controller.

Technical Parameters

Module Dimensions	400 × 400 mm mounting footprint; 185 mm overall height including intake guard; terminal box projects approximately 55 mm beyond the rear
Nominal Airflow	Approximately 3 m³/min
Average Outlet Velocity	Approximately 0.38 m/s
Final Filter	HEPA; filtration configuration rated at least 99.99% at 0.3 µm
Housing Material	SUS430 stainless steel, bright annealed finish
Fan and Control	One brushless DC fan with local speed adjustment
Power Supply	AC 100 V, single phase, 50/60 Hz
Nominal Power Consumption	Approximately 28 W
Approximate Weight	8.1 kg
Customization	Available based on the intended application and operating environment.

Applications

Suitable for small optical inspection housings, electronics handling stations and local clean-air covers. The enclosure must provide an unobstructed return-air route; this supply module does not provide hazardous-material containment.

Customer Product Concerns and Solutions

A standard ceiling module is too large for the machine roof.Use the 400 mm casing to fit the available mounting area, allowing clearance for the electrical connection and inlet.

A concentrated air stream disturbs lightweight parts.Set the fan speed to suit the actual work zone and check the airflow with the enclosure and fixtures in place.

Available Options

Discuss the mounting seal, supply-voltage configuration and final-filter selection for the intended enclosure. Alternative electrical configurations require matching components.

Planning a STJH 400 x 400 mm Compact EC Fan Filter Unit specification?

Send us your dimensions, installation conditions, performance targets and required surface finish.

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