Overview
The SAE CD3-1A power line EMI filter is a single-stage passive filtering device engineered to attenuate electromagnetic and radiofrequency interference (EMI/RFI) on AC power lines. Rated for 3A continuous current and 250V AC operation at 50/60Hz, this filter is ideal for industrial control systems, electronic equipment, and general-purpose machinery requiring clean power delivery and regulatory compliance with FCC Part 15 standards. The compact chassis-mount construction and integrated ETA 250V circuit protection make it suitable for permanent installation in control enclosures and power distribution assemblies.
Key Features
- Single-phase, single-stage passive EMI filtering topology
- 3-ampere continuous current rating with 250V AC nominal operation
- Integrated ETA 250V thermal fuse protection
- 50/60Hz dual-frequency operation for global compatibility
- Ultra-compact, low-profile chassis mount design for panel integration
- Insulated screw terminal blocks for secure wiring
- Passive component—no external power or control signals required
- RoHS-compliant construction
Technical Specifications
The SAE CD3-1A delivers consistent electromagnetic interference suppression across a wide frequency range, making it suitable for equipment that must meet industrial EMC directives and FCC regulations.
- Input Voltage: 250V AC nominal, single-phase
- Frequency: 50/60Hz
- Current Rating: 3A continuous
- Circuit Protection: ETA 250V thermal fuse (integrated)
- Operating Temperature Range: Standard industrial (-10°C to +40°C typical)
- Termination Style: Screw terminal blocks (M4 or similar)
- Mounting Type: Chassis mount (panel or base mounting)
- EMI Suppression Performance: Differential and common-mode attenuation across 0.15–30 MHz
- Compliance: RoHS, CE, FCC Part 15
- Configuration: Single-stage L-C filter network
Typical Applications
The SAE CD3-1A is well-suited for:
- Industrial programmable logic controllers (PLCs) and control systems
- Motor drives and variable frequency drives (VFDs) with long cable runs (>25 meters)
- Precision measurement and test equipment
- Medical device power supplies and audio/video equipment
- Telecommunications and data acquisition systems
- Laboratory instruments requiring quiet power
- Small machinery and automation equipment prone to EMI contamination
Compatibility & Replacements
Compatible With
- Standard 120/240V AC single-phase industrial power distribution systems
- PLC input modules and analog I/O cards sensitive to AC noise
- Motor control centers (MCCs) and soft-starter installations
- Low-voltage industrial power supplies (uninterruptible power supplies, DC converters)
- Equipment requiring FCC Part 15 Class A or Class B compliance
- Passive filtration in systems already employing shielded twisted-pair signal cables
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The SAE CD3-1A is a direct replacement for identical SAE part numbers and is functionally equivalent to other 3A, 250V single-stage power-line EMI filters with ETA protection and screw-terminal connection. Confirm terminal spacing and mounting hole alignment with the original equipment before installation.
Works With
- Passive single-phase power distribution infrastructure
- EtherNet/IP and PROFINET networked industrial systems (as auxiliary power conditioning)
- Studio 5000 and TIA Portal control systems (power integrity improvement)
- Shielded cable systems and multi-stage EMI suppression networks
- IEC 61000-4-6 (RF immunity) and EN 61800-3 (variable frequency drive) compliant installations
