Product Brief

VIP1-1B-03, with part number B011X0428, is a 3A single-phase lead-type EMI power filter supporting 115/250VAC input voltage and compatible with global 50/60Hz AC power supply. Built with mature circuit design, this filter features low leakage current, high insulation resistance, and a wide operating temperature range from -25°C to +100°C. It achieves excellent attenuation for both common-mode and differential-mode power line noise under the standard 50-ohm test setup. It can effectively suppress conducted interference on AC input lines and safeguard sensitive electronic equipment from power grid noise. The product has passed strict high-pot testing and supports panel or chassis installation.

Application & Purpose

Application Scope

Designed for single-phase AC powered devices, including industrial control systems, medical electronics, power supply modules, test & measurement instruments, office automation equipment, communication hardware and various commercial electronic products.

Main Functions

1. Suppress conducted EMI noise transmitted through AC power supply cables.
2. Isolate interference from the power grid to protect sensitive internal circuits of equipment.
3. Restrain noise generated by the equipment itself from feeding back into the mains grid, helping end products satisfy EMC standards such as EN55014 and GB9254.
4. Stabilize power input and improve long-term operational reliability of electronic systems.
   

FAQ (New 5 General EMI Filter Questions)

Q1: Can EMI filters work for both AC and DC power supply?

A: Most standard EMI power filters are designed for AC power lines. DC power filters adopt different internal circuit structures. Do not use AC EMI filters on DC circuits unless the datasheet explicitly supports DC application.

Q2: What causes high leakage current in an EMI filter?

A: Leakage current is mainly generated by Y capacitors between power lines and ground inside the filter. Higher capacitance value brings stronger noise reduction but larger leakage current. Choose low-leakage models for medical or safety-critical devices.

Q3: Is insertion loss the only indicator to judge an EMI filter’s performance?

A: Insertion loss is the key performance parameter, but rated current, leakage current, withstand voltage and operating temperature range also matter. All specs should match your project requirements when selecting a filter.

Q4: What will happen if the input and output wires of EMI filter are bundled together?

A: If input and output cables are tied or routed in parallel, noise will couple again between the two sides. This will greatly weaken the filtering effect. It is recommended to separate input and output wiring during installation.

Q5: Can I cut or shorten the pre-wired leads of a lead-wired EMI filter?

A: It is acceptable to trim the wires properly, but you need to guarantee secure insulation and reliable wire termination. Damaged insulation or poor connections may lead to safety risks and degrade filtering performance.