Why choose silicon carbide (SiC) instead of IGBT?

SiC MOSFETs tolerate higher switching frequencies (up to 40 kHz), which shrinks magnetics, raises efficiency to 98% or more, and reduces thermal loss by roughly a third. Practically, that means a smaller cabinet for the same capacity, lower cooling demand and longer device life — ideal for space- and efficiency-critical installations.

What is the rated capacity and voltage range?

The Ultra AHF covers 208-690V, 3P3W/3P4W, with 50A to 200A per module. Modules can be paralleled without a practical limit to reach 3000A and beyond for large plants.

Can it also correct power factor and balance loads?

Yes. The unit offers a selectable priority function covering harmonic mitigation, reactive power compensation and three-phase load balancing. In 3P4W mode it also cancels the accumulated 3rd-harmonic neutral current.

Which installations benefit most from the SiC Ultra AHF?

Data centres, semiconductor fabs, precision manufacturing and any site where switchroom space is scarce, cooling is expensive or downtime is costly. The higher power density lets you fit more compensation capacity in the same footprint.

SiC MOSFET Ultra AHF | Active Harmonic Filter

Name: CHITEK SiC MOSFET Ultra Active Harmonic Filter
Brand: CHITEK INNOPOWER

Product Description

Lower harmonic levels on a CHITEK Active Harmonic Filter translate directly into a more dependable electrical network and lower running costs. By removing the harmonic currents that cause extra heating, the filter helps eliminate the nuisance tripping of protective devices and the unexplained fuse failures that plant teams often spend weeks tracing.

Because harmonic heating is kept in check, motors, transformers, switchgear and cables run cooler, so their service life is extended and maintenance schedules become lighter. On new-build projects, engineers can also revisit the practice of oversizing distribution equipment purely as a defence against harmonics — a smaller, better-utilised design is usually enough.

Graphical HMI

Direct control, configuration, monitoring and harmonic analysis from the front panel — no PC required.

Comprehensive Measurements

RMS voltages and currents, THDu/THDi, system frequency, load factor, compensated current, PF before/after and 2nd–50th order spectrum.

Power Factor Correction

Dynamic correction for both lagging and leading power factor without capacitor-step switching.

Load Balancing

Balances three-phase systems and relieves neutral current in 3P4W networks.

Low Thermal Loss

SiC switching keeps losses under 1.8% of rated kVA and efficiency at 98% or better, cutting cooling demand.

Flexible & Modular

Modular design embedded in standard or customized cabinets, with parallel expansion and factory ODM support.

Technical Parameters

Rated Voltage	208–690 V
Rated Capacity	50 A – 200 A per module (parallel expandable, unlimited)
Frequency	50 / 60 Hz
Wiring Mode	3P3W / 3P4W
Filtering Range	2nd – 51st order harmonic
Function	Harmonic mitigation, reactive compensation, imbalance phase balancing
Full Response Time	< 50 μs
Switching Frequency	up to 40 kHz (SiC)
Efficiency	≥ 98%
Power Loss	< 1.8% of rated kVA
THDi (after compensation)	< 5% (IEEE 519)
Topology	3-level NPC, SiC MOSFET
IP Class	IP20 (customizable)
Installation	Wall mounted / floor stand cabinet
Standard	IEC 61000 / IEC 62477
Communication	MODBUS / optional Ethernet

WHY CHITEK SiC MOSFET Active Harmonic Filter?

Performance you can specify

The SiC MOSFET bridge is specified for accurate, repeatable harmonic cancellation rather than best-effort filtering. THDi is driven below 5% at the point of common coupling, so the power quality written into your design is the power quality measured at commissioning.

One module, any size of plant

Modules parallel without a practical ceiling, so capacity is added as the site grows instead of being guessed at the outset. Enclosures follow the space you actually have — wall-mounted, rack, or floor-standing cabinet.

Already running in your industry

CHITEK filters are in service across data centres, manufacturing plants, commercial buildings and renewable energy projects. Equipment, spares and documentation ship worldwide, so support is never a regional afterthought.

Engineers before and after the order

Sizing is done with you, from your own load data — not from a catalogue. The same application engineers stay reachable through installation and commissioning, and remain on hand to fine-tune the installation long after handover.

Certifications

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Want a network that runs cooler, trips less often and stays inside specification? Send us your load details and our engineers will propose a configuration and quote it against your actual requirements — not a catalogue guess.

Request a Consultation

FAQs About the SiC Ultra AHF

Q1: What is a SiC MOSFET active harmonic filter?

A SiC active harmonic filter replaces the conventional silicon IGBT bridge with silicon-carbide power devices. SiC switches faster with lower loss, so the filter achieves higher efficiency, higher power density and lower heat rejection while still cancelling harmonics in real time and holding THDi below 5%.

Q2: Why choose silicon carbide instead of IGBT?

SiC MOSFETs tolerate higher switching frequencies (up to 40 kHz), which shrinks the magnetics, raises efficiency to 98% or more and reduces thermal loss by roughly a third — a smaller cabinet for the same capacity, less cooling and longer device life.

Q3: How does the Ultra AHF work?

An external CT samples the load current; a DSP/FPGA runs an FFT to separate 2nd–51st order harmonics, reactive power and imbalance; the SiC bridge then injects an equal and opposite-phase compensation current so the utility sees only the fundamental.

Q4: What capacity and voltage range is available?

208–690V, 3P3W/3P4W, 50A to 200A per module. Modules parallel without a practical limit to reach 3000 A and beyond for large plants.

Q5: Can it correct power factor and balance loads too?

Yes. A selectable priority function covers harmonic mitigation, reactive compensation and three-phase balancing. In 3P4W mode it also cancels the accumulated 3rd-harmonic neutral current.

Q6: How do I confirm the right model for my site?

Send us the load's harmonic spectrum, voltage class and installed nonlinear capacity. CHITEK supplies a selection matrix by voltage class, series and capacity, plus a sizing calculation on request.