CW1B-6A EMI Power Filter

The CW1B-6A-L is a single-phase EMI power line filter rated at 6A for 115/250V AC systems operating at 50/60 Hz, built into a compact metal housing measuring approximately 5 × 4.5 × 2 cm. It is a first-order, single-circuit AC input filter designed to reduce electromagnetic interference and other electrical noise on the mains line before it reaches sensitive circuitry. The filter combines capacitive and inductive elements—including a 3.3 nF Cy capacitor per the manufacturer datasheet—to attenuate both common-mode and differential-mode noise, and the datasheet specifies a maximum leakage current below 0.5 mA under normal conditions at 250V AC/50 Hz.

Termination is by insulated wire leads, indicated by the “L” suffix in the model number, and the LINE and LOAD sides are marked on the metal body so the input and output cannot be confused during installation. The case includes mounting holes spaced 4 cm apart with a 5 mm diameter for secure chassis fixing. Because of its small footprint and low leakage, this filter is used in telecommunication equipment, computer motherboards, AC adapters, laser equipment, and UPS devices, as well as in medical, household, and datacom equipment where conducted noise must be kept away from the load. This CW1B-6A EMI filter is a practical component for improving power quality and electromagnetic compatibility in both domestic and industrial AC installations.

1. Telecommunication equipment and data communication systems.
2. Computer motherboards and AC adapters.
3. Laser equipment and precision industrial electronics.
4. UPS devices and backup power systems.
5. Medical and household equipment with low leakage current requirements.
6. Automation and electronic data processing equipment requiring conducted-noise suppression.

1. Model: CW1B-6A-L (EMI-CW1B-6A-L).
2. Filter type: single-phase AC power line EMI filter, first-order single circuit.
3. Rated voltage: 115/250V AC (maximum continuous operating voltage 250V AC).
4. Working frequency: 50/60 Hz.
5. Rated current: 6A at 40°C maximum.
6. Leakage current: below 0.5 mA at 250V AC/50 Hz (manufacturer datasheet).
7. Cy capacitance: 3.3 nF (manufacturer datasheet).
8. Attenuation: common-mode and differential-mode conducted noise suppression.
9. Housing material: metal.
10. Dimensions (L × W × H): 5 × 4.5 × 2 cm.
11. Mounting holes: 4 cm spacing, 5 mm diameter.
12. Termination: insulated wire leads (suffix “L”); LINE and LOAD marked on the body.
13. Operating and storage temperature: -25°C to +85°C (climate category 25/085/21).
14. Withstand voltage: not stated on the Aftab listing; manufacturer and distributor figures differ (see quality-control report).
15. Weight: not stated on the Aftab listing.