Overview
The SMC AFF4C-N03BC-RT is a modular-style main line air filter engineered to remove oil, water, and particulate contaminants from compressed air systems. Part of SMC’s AFF (new style) series, this filter provides cost-effective first-stage purification with a nominal filtration rating of 1 µm and 99% efficiency. The modular design enables direct connection to other SMC air preparation equipment, making it ideal for OEM integration and field upgrades in pneumatic control systems.
Key Features
- Modular design compatible with AFF2C through AFF22C series units
- Particulate filtration and coarse droplet removal for clean air delivery
- Normally closed (N.C.) auto-drain with 1/4″ NPT drain port and 3/8″ one-touch fitting
- Element service indicator for maintenance scheduling
- Maximum air flow 750 L/min at 0.7 MPa
- Polycarbonate bowl construction with 1.3× increased element capacity vs. standard models
- Enhanced water separation efficiency extends filter element life
Technical Specifications
| Specification | Value |
| Part Number | AFF4C-N03BC-RT |
| Series | AFF (New Style) Main Line Filter |
| Port Size | 3/8″ NPT (both inlet and outlet) |
| Filter Rating | 1 µm (nominal, 99% efficiency) |
| Maximum Flow Rate | 750 L/min at 0.7 MPa |
| Bowl Material | Standard Polycarbonate |
| Auto-Drain Type | Normally Closed (N.C.) |
| Drain Port Thread | NPT 1/4″ |
| Drain Fitting | ø3/8″ One-touch |
| Element Service Indicator | Yes, with visual indicator |
| Mounting | Bracket included |
Typical Applications
- Pneumatic control systems and automation equipment
- Precision air tools and pneumatic machinery
- Industrial pneumatic networks requiring first-stage particulate filtration
- OEM compressed air circuit protection
- Air-to-oil systems and coarse mist removal before dryers
Compatibility & Replacements
Compatible With
- SMC AFF series modular air filters (AFF2C, AFF4C, AFF6C, AFF9C, AFF13C, AFF22C)
- SMC AD auto-drain modules (AD17, AD27, AD37, AD47)
- SMC air dryers and precision filters in downstream applications
- Standard 3/8″ NPT compressed air piping systems
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. While the AFF4C-N03BC-RT is the primary designation for this configuration, always confirm exact interchangeability with legacy or regional variants.
Works With
- Pneumatic FRL (Filter-Regulator-Lubricator) circuits
- PROFINET and Ethernet/IP-enabled pneumatic control systems
- Manual and solenoid-controlled pneumatic networks
- General compressed air distribution in manufacturing and control applications
