LXLZ Note: This Product Provides Solutions for Parameter Customization And Application.
DIN Rail AC EMI Filter Single Phase Rail Mount Noise
The CW4L2-RG Series Single Phase AC Power Line EMI Filter is a DIN rail-mountable electromagnetic interference suppression component designed for direct integration into industrial control panels, electrical enclosures, and automation cabinets. Manufactured by LXLZ (Shenzhen Lize Electronics), the RG series builds upon the proven CW4L2 dual-stage π-type filter platform and adds a factory-integrated DIN rail mounting bracket — enabling tool-assisted snap-on installation onto standard 35mm DIN rails without additional hardware or mounting modification.
Rated for 115VAC and 250VAC dual voltage, compatible with 50Hz and 60Hz grids, and available in current ratings from 1A to 30A, the CW4L2-RG is engineered for system integrators, panel builders, and OEM manufacturers who demand both high-performance EMI attenuation and streamlined installation workflow in high-density enclosure environments.
All units are CE and RoHS certified and subjected to 100% electrical testing prior to shipment.
Table of Contents
Specifications
| Parameter | Details |
|---|---|
| Model Series | CW4L2-RG |
| Phase | Single Phase |
| Rated Voltage | 115VAC / 250VAC |
| Frequency | 50Hz / 60Hz |
| Current Rating | 1A / 3A / 6A / 10A / 16A / 20A / 30A |
| Connection Type | Terminal Block — Wire Lead (LINE / LOAD) |
| Mounting Type | DIN Rail Mount (35mm Standard DIN Rail) |
| DIN Rail Bracket | Zinc-Alloy Adjustable Clip with Locking Screw |
| Housing | Nickel-Plated Steel Shell |
| Terminal Material | Gold-Plated Copper Terminal |
| Terminal Protection | Transparent Protective Cover |
| Filter Topology | Dual-Stage π-Type Circuit |
| CX Capacitor | 3 × 0.1μF |
| CY Capacitor | 2 × 3300pF |
| Inductance | 4 × 0.8mH |
| Bleed Resistor | 1MΩ / 1/2W |
| Certification | CE / RoHS |
📄 Full dimensional drawings, DIN rail mounting dimensions, insertion loss curves, and test reports available upon request.
The RG Difference — DIN Rail Mounting Explained
The defining feature of the CW4L2-RG series versus the standard CW4L2-R series is the factory-integrated DIN rail mounting assembly.
What is included:
- Black Nylon DIN Rail Base — pre-attached to the filter body, providing the primary rail engagement interface
- Zinc-Alloy Adjustable Rail Clip — spring-tensioned locking clip with an integrated adjustment screw for secure, rattle-free rail retention
- Tool-Assisted Locking — the adjustment screw allows the clip to be firmly tightened against the rail profile, preventing vibration-induced loosening in mobile or high-vibration environments
Installation Advantage:
| Feature | CW4L2-R (Screw Mount) | CW4L2-RG (DIN Rail Mount) |
|---|---|---|
| Mounting Method | 4× M4 screws through flange | Snap onto 35mm DIN rail |
| Installation Time | ~5 minutes per unit | ~30 seconds per unit |
| Tools Required | Screwdriver + drill | Screwdriver (clip lock only) |
| Repositioning | Requires unscrew & remount | Slide and re-clip |
| Panel Space Usage | Fixed position | Flexible positioning on rail |
| Vibration Resistance | High (bolted) | High (locked clip + screw) |
For panel builders managing multiple filter installations per enclosure, the RG series significantly reduces assembly labor time and simplifies future field servicing or component replacement.
Circuit & Internal Component Details
The CW4L2-RG employs the same proven dual-stage LC π-type filter topology with an upgraded inductor specification to support higher sustained current loads:
Capacitor Network
- CX (X-Class, Differential-Mode): 3 × 0.1μF Connected line-to-line, suppressing differential-mode conducted noise from switching power supplies, motor drives, and inverter loads
- CY (Y-Class, Common-Mode): 2 × 3300pF Connected line-to-earth and neutral-to-earth, providing a controlled low-impedance path to chassis ground for common-mode interference currents
Inductor Network
- L: 4 × 0.8mH Common-Mode Choke (Upgraded from 0.5mH in the 20A-R model — optimized for the 30A full-load current rating) Wound on high-permeability toroidal cores. Presents high impedance to common-mode noise frequencies while maintaining negligible impedance at 50/60Hz — minimizing insertion voltage drop under full load
Bleed Resistor
- R: 1MΩ / 0.5W Provides safe and compliant discharge of X-capacitor stored charge after power removal — essential for equipment safety certification compliance under IEC 60335 and EN 60950
Product Features
Nickel-Plated Steel Enclosure
Full metal enclosure with nickel plating delivers:
- High EMI shielding effectiveness across the suppression frequency band
- Excellent resistance to corrosion, humidity, and industrial atmospheric contaminants
- Reliable chassis ground bonding surface for common-mode noise attenuation path integrity
- Robust mechanical durability for long-term panel installation
Factory-Integrated 35mm DIN Rail Mount
- Compatible with EN 60715 standard 35mm top-hat (TS35) DIN rails — the universal standard used in IEC-compliant control panels worldwide
- Zinc-alloy clip with adjustment screw provides secure, vibration-resistant retention — no risk of unintended rail disengagement
- Significantly accelerates panel assembly workflow for system integrators and panel builders managing multiple filter units per enclosure
- Enables rapid field replacement without enclosure disassembly or drilling
Gold-Plated Terminal Blocks with Transparent Safety Covers
- Gold-plated copper terminals on both LINE and LOAD sides ensure minimal contact resistance, resistance to oxidation, and reliable long-term current-carrying performance
- Transparent protective terminal covers provide operator protection from live terminals and prevent contamination ingress to wiring connections
- Clear directional labeling (LINE / LOAD, L / N / E) eliminates installation polarity errors
Dual Voltage: 115VAC / 250VAC
Single product variant supports both North American (115V/60Hz) and international (220–250V/50Hz) power standards — simplifying global inventory management for international OEM programs and distribution networks
Upgraded 0.8mH Inductors for 30A Performance
The larger inductor value (4 × 0.8mH vs. 0.5mH in lighter-rated models) is specifically selected to maintain effective common-mode attenuation at higher sustained current levels, where smaller inductors may experience core saturation effects that degrade filter performance under full-load conditions.
Applications
The CW4L2-RG DIN Rail Series is particularly well-suited for applications where panel space efficiency, installation speed, and serviceability are critical procurement criteria:
Industrial Control Panels & Automation Cabinets
- DIN rail-based PLC control systems
- Servo drive and VFD panels
- Motor control centers (MCC)
- Distributed I/O enclosures
Industrial Automation & Motion Control
- CNC machining and processing equipment
- Robotic workcell power distribution
- Conveyor and material handling systems
- Automated packaging machinery
Power Electronics & Energy Management
- Industrial switching power supplies
- UPS and power conditioning systems
- Solar inverter AC input filtering
- Energy storage system interfaces
Building Automation & Smart Infrastructure
- BMS (Building Management System) control panels
- HVAC variable speed drive enclosures
- Intelligent lighting control systems
- Access control and security infrastructure panels
Telecommunications & Data Infrastructure
- Communication equipment rack power filtering
- Network infrastructure enclosure power conditioning
Medical & Laboratory Equipment
- Clean power input for diagnostic and analytical instruments
- Laboratory automation enclosure power filtering
Railway & Transportation
- On-board equipment enclosures with DIN rail architecture
- Trackside signaling and control cabinets