Product Brief

VIP1-1B-03, identified by part number B011X0428, is a 3A single-phase lead-wired EMI power filter engineered for 115/250VAC input and compatible with worldwide 50/60Hz AC mains systems. Featuring a proven circuit architecture, this filter delivers low leakage current, high insulation resistance, and a broad operating temperature window spanning -25°C to +100°C. Under the standard 50-ohm test configuration, it exhibits superior attenuation for both common-mode and differential-mode conducted noise. It effectively cleans up interference on AC input lines and shields sensitive electronic devices from power-supply-borne disturbances. The unit has undergone stringent high-voltage testing and is suitable for panel or chassis mounting.

Application & Purpose

Application Scope

Ideal for single-phase AC-powered equipment including industrial automation controllers, medical electronic devices, power supply units, testing and measuring instruments, office automation systems, communication hardware, and a wide range of commercial electronic products.

Main Functions

1. Eliminate conducted EMI noise traveling along AC power supply cables.
2. Block incoming interference from the power grid to safeguard delicate internal circuitry.
3. Prevent noise generated by the equipment itself from being injected back into the mains, assisting end products in meeting EMC standards such as EN55014 and GB9254.
4. Enhance power input stability and boost the long-term operational dependability of electronic systems.

FAQ (New 5 General EMI Filter Questions)

Q1: What is the difference between single-stage and multi-stage EMI filters?

A: A single-stage filter uses one set of filtering components and is suitable for moderate noise environments. A multi-stage (two-stage or higher) filter adds additional filtering sections, providing stronger attenuation especially at lower frequencies, but it is larger in size and has higher leakage current. Choose according to your EMC test requirements.

Q2: Why do EMI filters need a metal housing?

A: The metal housing serves as a shielding enclosure that prevents internal noise from radiating outward and blocks external interference from coupling into the filter circuit. It also provides a low-impedance grounding path, which is essential for effective common-mode noise suppression.

Q3: How can I verify whether an EMI filter is working effectively?

A: The most reliable method is to conduct an EMC conducted emission test (such as EN55014) with and without the filter installed, and compare the noise level reduction. A practical on-site check is to measure the equipment's malfunction rate or signal stability before and after installing the filter.

Q4: Does the installation orientation of an EMI filter matter?

A: For most lead-wired and panel-mount EMI filters, orientation does not significantly affect electrical performance. However, ensure that the filter is mounted in a location with adequate ventilation to avoid heat buildup, and keep the input and output leads separated regardless of orientation.

Q5: What is the typical service life of an EMI filter?

A: Under normal operating conditions within rated voltage, current, and temperature ranges, EMI filters can typically last 10 years or more. The main aging factors are capacitor degradation and thermal stress. Operating the filter below its rated current and within the specified temperature range will maximize its service life.