CW1B-3A-T05 Power EMI Filter 4-Pin Soldering Metal Noise Suppressor Electromagnetic Interference

1.Product Description

CW1B-3A-T05 is a power EMI filter featuring a 4-pin solder-mount design with a metal housing, also known as an electromagnetic interference noise suppressor. Its core function is to effectively suppress electromagnetic interference noise generated by electronic equipment during operation and prevent external electromagnetic interference from entering the equipment. This ensures the equipment complies with electromagnetic compatibility standards and operates stably and reliably. This filter model is typically deployed at the DC power input stage of applications such as switching power supplies, industrial control systems, and communication equipment. It serves as a critical component for power purification and enhancing product immunity against interference.

CW1B-3A-T05 These compact, welded power supply EMI filters find extensive application, primarily in space-constrained DC-powered electronic equipment with stringent electromagnetic compatibility requirements.

Below are several detailed application examples:

1. Industrial Automation and Control Equipment

Specific Devices: I/O modules for Programmable Logic Controllers (PLCs), Distributed Remote Terminal Units (RTUs), industrial sensors, small servo drives, or stepper motor controllers.

Functional Explanation: In factory environments, numerous motors, variable frequency drives, and relays generate intense electromagnetic noise transmitted through power lines and spatial radiation. Installing the CW1B-3A-T05 at the DC power input (e.g., 24VDC input) of these devices effectively blocks external interference from entering sensitive CPUs or signal acquisition circuits, preventing program runaway, data errors, or malfunctions. Simultaneously, it suppresses noise generated by the device's own switching power supply from feeding back into the grid and interfering with other equipment on the same line.

2. Communication and Network Equipment

Specific Equipment: Industrial switches, routers, 5G small cells, fiber optic transceivers, and circuit boards of Network Attached Storage (NAS) devices.

Functional Details: These devices demand stable data transmission and low bit error rates. Their internal switching power supplies and high-speed digital circuits (e.g., CPUs, PHY chips) are primary noise sources. Noise transmitted via power lines can interfere with other devices sharing the same power supply (e.g., connected cameras). Installing this filter at the power input of the PCB “cleans” the power supply, providing a pristine power environment for internal chips. This ensures stable data communication and aids in passing stringent communication regulations like FCC and CE certifications.

3. Automotive Electronics (In-Vehicle Devices)

Specific Devices: In-vehicle infotainment systems (central control screens), camera control modules for Advanced Driver Assistance Systems (ADAS), vehicle gateways, dashcams.

Functional Details: The automotive electrical environment is extremely harsh, featuring load dumping, load dumping, and various transient pulse interferences from ignition systems, power window motors, etc. CW1B-3A-T05 effectively filters out broadband noise conducted through power lines, safeguarding internal precision processors and image sensors from interference. This prevents screen flickering, system reboots, or functional failures, ensuring driving safety and device reliability.

4. Medical Electronic Devices

Specific Equipment: Portable/handheld medical devices such as patient monitors, portable ultrasound systems, infusion pumps, and handheld diagnostic equipment.

Functional Details: Medical devices demand extremely high accuracy in capturing vital signs, requiring an exceptionally low noise background. Simultaneously, the devices themselves must not become interference sources affecting other equipment in the same ward (e.g., electrocardiographs). Implementing this filter in the low-power DC power supply section of such devices minimizes interference from internal switching power supply noise to weak analog signals (e.g., ECG, EEG). This ensures measurement accuracy and electromagnetic safety, meeting stringent medical EMC standards (e.g., IEC 60601-1-2).

5. Consumer Electronics and Office Equipment

Specific Devices: Control mainboards for high-end smart speakers, set-top boxes, webcams, external hard drive docks, and multifunction printers.

Functional Details: In these devices, filters primarily serve to meet mandatory EMC certifications (e.g., CE, FCC), preventing post-market interference with radio broadcasts, TV signals, or wireless networks. The CW1B-3A-T05's compact size is ideal for integration onto space-constrained consumer product PCBs, suppressing noise at its source to ensure legal market entry and enhance user experience.

In summary, the core application of the CW1B-3A-T05 lies in serving as a “power gatekeeper” within any compact electronic device utilizing switching power supplies (especially DC-DC converters). It is an indispensable, critical small component for achieving product stability, reliability, and compliance (EMC).

2.Performance Characteristics

3.Other Recommended Products

4.Company Profile