We Design. We Build. We Deliver.
In modern industrial electronics, electromagnetic compatibility (EMC) is no longer an afterthought—it is a critical design prerequisite. As a premier Noise Filter Manufacturer & Exporter in Hanoi, our engineering team addresses the multi-faceted challenges of high-frequency switching noise, conducted emissions, and voltage transients created by Variable Frequency Drives (VFDs), switched-mode power supplies (SMPS), and high-power DC fast-charging systems.
Electrical noise propagating through power lines exists in two distinct topologies: Differential-Mode (DM) noise, which travels in opposite directions along line-to-line paths, and Common-Mode (CM) noise, which travels in the same direction along line-to-ground paths. Our customized LC filter networks utilize high-permeability nanocrystalline and toroidal ferrite cores to achieve maximum insertion loss ($20 \log_{10}(V_1/V_2)$) across the 150kHz to 30MHz regulatory spectrum.
When switching heavy capacitive loads—such as power factor correction banks—or high-voltage DC contactors in battery storage systems, peak inrush currents can reach up to 200 times rated current. Our specialized switching capacitor contactors (CJ19 series) integrate early-make damping resistors to limit current surges, preserving contact tip life and preventing severe line voltage sags that disturb surrounding digital circuitry.
| Filter / Component Platform | Operating Voltage | Rated Current | Attenuation Spectrum / Function | Compliance Standards |
|---|---|---|---|---|
| Single-Phase EMI Filters | 120 / 250 VAC (50/60Hz) | 1A – 100A | 150 kHz – 30 MHz (Up to 75dB CM attenuation) | UL 1283, IEC/EN 60939, CE |
| Three-Phase Industrial Filters | 280 / 520 VAC (3-Phase) | 5A – 1000A | Suppress VFD switching harmonics & motor bearing currents | CISPR 11/32, FCC Part 15, RoHS |
| High-Voltage DC Contactors | 12V – 1500 VDC | 10A – 500A continuous | Hermetically sealed arc-free DC power breaking | UL 508, CCC, CE, CSA |
| Capacitor Switching Contactors | 220V / 380V / 440V AC | 10 kvar – 100 kvar | Inrush current damping via pre-charge resistors | IEC 60947-4-1, GB/T 14048.4 |
Hanoi has rapidly evolved into Southeast Asia’s premier high-tech manufacturing capital. Operating within the Red River Delta industrial corridor requires electronic components built to withstand specific regional power quality fluctuations and aggressive tropical climate conditions.
In semiconductor testing facilities and optical equipment manufacturing labs in Hoa Lac, micro-volt electromagnetic noise leads to data corruption. Our low-leakage, medical-grade EMI noise filters ensure stringent compliance with class B emission limits, protecting automated inspection lines from high-frequency line harmonics.
Automated Surface Mount Technology (SMT) and robotic welding cells operating in Northern Vietnam’s massive electronics assembly plants generate substantial common-mode noise. Installing our 3-phase high-performance line filters prevents cross-talk between high-power motor drives and delicate PLC control units.
Hanoi’s aggressive expansion of electric vehicle charging networks requires reliable high-voltage DC isolation components. Our 350A/400A 1000V epoxy-sealed DC contactors are deployed directly in DC fast-charging cabinets, delivering zero-arc hermetic safety during rapid battery charging cycles.
Hanoi experiences extreme seasonal humidity exceeding 90% RH and summer ambient temperatures over 40°C. Our 4-pole HVAC definite purpose contactors feature vacuum-potted magnetic coils and anti-corrosive silver-alloy contacts designed specifically to prevent condensation shorting and thermal degradation.
As Vietnam transitions toward Industry 4.0 and green energy compliance, manufacturing standards are changing rapidly. Electric Power Vietnam and EVN (Electricity Vietnam) directives now impose strict Total Harmonic Distortion (THD) limits on industrial energy consumers. Key macro trends driving electromagnetic filter adoption include:
Our Hanoi R&D laboratory offers custom filter topology modeling (L, T, Pi networks) and custom choke winding to match your exact device attenuation curve requirements.
We conduct full spectral insertion loss testing from 9 kHz to 3 GHz inside our shielded anecdotal testing facilities before full-scale OEM batch production.
Every batch undergoes 100% dielectric withstand, insulation resistance, and functional contact resistance testing under full rated load prior to shipment.
Selection depends on your power input network and load configuration. Single-phase filters (120V/250V) are designed for commercial electronics, control panels, and light equipment. Three-phase filters (up to 520V) are required for heavy industrial machinery, VFD motor drives, and solar inverters to suppress high-power line-to-line and line-to-ground emissions.
Yes. All of our filtering products are manufactured according to UL 1283, IEC/EN 60939, CISPR 11/32, and CE guidelines. Test reports and material compliance statements (RoHS / REACH) are provided with all engineering samples and production runs.
Absolutely. As a direct manufacturer in Hanoi, we offer custom mounting plates, wire leads, IEC sockets, terminal blocks, stud connectors, and private-label packaging configured to your mechanical enclosure constraints.
Standard component series are stocked locally for quick dispatch. Custom engineered samples take 7–10 working days, while bulk OEM production runs generally ship within 2 to 3 weeks via Air (Noi Bai Airport) or Sea (Haiphong Port).
Consult directly with our Hanoi-based application engineering team. We assist with schematic reviews, EMC pre-compliance validation, and rapid sample prototyping.
Inquire Now