Terminal Block EMI Filter Industrial AC Line Suppressor

El CW4L2-T Series Single Phase AC Power Line EMI Filter is a quick-connect tab terminal variant of the CW4L2 EMI filter family — engineered for applications where rapid assembly, automated production line integration, and compact internal equipment mounting are the governing installation requirements.

Manufactured by LXLZ (Shenzhen Lize Electronics), the CW4L2-T replaces screw-clamp or stud-bolt terminals with Faston-style flat tab (quick-connect) terminals — enabling tool-free wire harness connection via standard push-on female connectors. This termination method is the industry standard for high-volume OEM equipment assembly, appliance manufacturing, and compact power electronics integration where assembly speed, repeatability, and spatial efficiency are production priorities.

Housed in a fully enclosed nickel-plated steel body with a dual-stage π-type LC filter circuit and rated for 115VAC and 250VAC at 50Hz / 60Hz, the CW4L2-T series covers current ratings from 1A to 20A — providing effective EMI and RFI suppression across a broad range of embedded equipment applications.

All units carry CE and RoHS certification with 100% electrical testing prior to shipment.

Specifications

📄 Full dimensional drawings, tab terminal dimensions, insertion loss curves, and test reports available upon request.

The T Series Difference — Faston Quick-Connect Terminal Design

The defining characteristic of the CW4L2-T series is its flat blade tab (Faston-style) quick-connect terminal system — a wire termination approach specifically optimized for OEM equipment manufacturing environments and compact internal installations.

Terminal Construction Detail

Each terminal consists of:

• Flat Blade Male Tab — Standard Faston profile, compatible with 4.8mm or 6.3mm push-on female connectors (specify on order)
• Black Rubber Grommet Bushing — Environmental sealing and mechanical strain relief at the housing exit point
• Side-Entry Orientation — Terminals exit horizontally from both LINE and LOAD sides, enabling inline cable routing parallel to the filter body axis

Connection Method Comparison

The Faston tab terminal system is the preferred connection standard for OEM equipment manufacturers assembling internal power line filtering into finished products — enabling pre-fabricated wire harness connection, reducing assembly labor, and improving production line throughput consistency.

Circuit & Internal Component Details

Capacitor Network

• CX (X-Class, Differential-Mode): 3 × 0.1μF Line-to-line connected X-rated capacitors suppressing differential-mode conducted noise from switching regulators, motor drives, and digital load switching transients
• CY (Y-Class, Common-Mode): 2 × 3300pF Line-to-earth and neutral-to-earth Y-rated capacitors providing a controlled low-impedance path to chassis ground for common-mode interference — effectively diverting high-frequency noise before it propagates to the protected equipment

Inductor Network

• L: 4 × 0.3mH Common-Mode Choke (Optimized inductance value for the 1A–20A current range — smaller core size contributes to the compact body dimensions of the T series) High-permeability toroidal core winding presenting high impedance to common-mode interference frequencies while maintaining negligible impedance at the 50/60Hz power fundamental

Bleed Resistor

• R: 1MΩ / 0.5W X-capacitor safety discharge resistor — ensures stored charge dissipates within the required time window following AC disconnection, in compliance with IEC 60335 and EN 60950 safety standards. Essential for certification compliance in consumer and commercial equipment applications

Product Features

Fully Enclosed Nickel-Plated Steel Housing

• Seamless fully enclosed body maximizes electromagnetic shielding — no aperture leakage
• Nickel plating provides superior corrosion resistance for long-term reliability in humid or industrial atmospheric environments
• Compact body dimensions suit space-constrained internal equipment mounting
• Reliable chassis ground bonding surface for common-mode noise attenuation path

Faston Flat Tab Quick-Connect Terminals

• Tool-free connection via standard push-on female connectors — eliminates screwdriver assembly steps on production lines
• Compatible with pre-fabricated wire harnesses — supports lean manufacturing and automated harness assembly
• Side-entry terminal orientation allows cable routing parallel to the filter body, minimizing the total installation footprint within equipment enclosures
• Rubber grommet sealing at each terminal group exit point provides mechanical strain relief and contamination ingress protection

Compact Body with Mounting Flanges

• The 4×0.3mH inductor specification enables a reduced core volume compared to higher-current variants — contributing to the overall compact form factor of the T series
• Bottom-mounted screw fixing flanges provide secure panel or chassis mounting
• Minimal depth behind the mounting surface suits shallow enclosure and panel installations

Dual Voltage: 115VAC / 250VAC

Single variant supports North American (115V/60Hz) and international (220–250V/50Hz) power standards — simplifying BOM management for internationally distributed OEM products

Dual-Stage EMI / RFI Suppression

Effective attenuation of both common-mode and differential-mode conducted interference — supporting equipment EMC compliance to CISPR 22 / EN 55022 Class B and equivalent international standards