Overview
The SMC AFF4C-N03BC-T main line filter is a modular compressed air filtration unit designed for medium-flow applications in industrial automation and pneumatic systems. This coarse-stage filter removes particulates, moisture, and oil mist to extend the service life of precision components and reduce equipment downtime.
Key Features
- Modular Design — connects seamlessly with other SMC air preparation equipment (dryers, secondary filters, regulators)
- Element Service Indicator — built-in visual indicator signals when element replacement is needed; eliminates guesswork on maintenance intervals
- High Separation Efficiency — 1 micron nominal filtration rating with 99% efficiency at particulate removal
- Auto-Drain Port — normally closed (N.C.) design prevents backflow; condensation drains automatically when system pressure builds
- NPT Thread Standard — 3/8″ port compatible with North American compressed air systems and piping configurations
- Compact Polymer Case — improved water separation capacity (approximately 1.3× standard resin construction) with increased visual bowl transparency
Technical Specifications
- Model: AFF4C-N03BC-T
- Port Size: 3/8″ NPT (National Pipe Thread)
- Filter Series: AFF (modular main line)
- Filtration Rating: 1 micron nominal, 99% efficiency
- Filter Function: Particulate filtration and coarse droplet removal
- Auto-Drain Type: N.C. (Normally Closed); minimum operating pressure 0.1 MPa
- Bowl Material: Standard resin with increased capacity design
- Element Replacement Interval: Every 2 years or when pressure drop reaches 0.1 MPa, whichever comes first
- Optional Accessories: Bracket support, metal bowl option, drain gauge
- Thread Options: NPT (standard for North America), G, or PT threads available
- Condition: New – No Box
Typical Applications
- Primary filtration stage in multi-stage air preparation systems
- Protection of downstream regulators, actuators, and control valves from particulate contamination
- Compressed air networks in manufacturing facilities, assembly lines, and packaging equipment
- Pneumatic tool supply lines where moisture and debris removal is critical
- Industrial automation environments requiring reliable, low-maintenance filtration
Compatibility & Replacements
Compatible With
- SMC modular air preparation components (AF and AFF series)
- Standard 3/8″ NPT compressed air piping and manifolds
- Industrial pneumatic controllers and automation systems
- Compressed air dryers, secondary filters, and regulators in series
Replaces / Drop-In Replacement For
- AFF4C-N03BC (standard version without element service indicator)
- AFF4C-N03BC-X6 (alternative configuration)
- AFF4C-N03BC-RT (with bracket variant)
- Legacy AFF series 3/8″ filters in 4-size configuration
Works With
- SMC pneumatic circuit design and modeling software
- Standard 3/8″ NPT one-touch and threaded fittings
- Industrial compressed air system standards (ISO 8573-1 compliance)
- Auto-drain systems and manual drain valve configurations
