Exclusive Distribution · Germany & European Union

World-Class Material.
Local Partner.

Nanocrystalline ring core chokes and amorphous transformer cores — direct from the world's #1 amorphous ribbon manufacturer, with German engineering support, EU compliance, and local stock.

Request a Project Our Services

Our Services

01

Full supply chain control

Yunlu produces its own amorphous and nanocrystalline ribbon in-house — with no dependency on third-party material suppliers. The result: stable lead times, secure availability, and a structural cost advantage of 20–35% versus European choke manufacturers who buy ribbon externally.

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02

57–72% smaller than ferrite

Nanocrystalline delivers 5–10× the initial permeability of standard MnZn ferrite. Same inductance, same rated current, dramatically smaller footprint. Drop-in replacement — no schematic redesign required.

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03

German presence. EU compliance.

German- and English-speaking technical sales. Local warehouse with stock availability for fast delivery. CE / RoHS / REACH documentation as standard. Everything OEM procurement and quality assurance need to approve a new supplier — in your language, in your time zone.

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04

Custom solutions

Standard catalogue plus engineered-to-order. Custom inductance, current rating, and core geometry below competitors' minimum order quantities. Co-development with Yunlu's design team in 2–4 weeks.

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Ring Core Chokes & EMC Filters

Ring core
Nanocrystalline Common-Mode Filter Inductor Cores

• Automotive components (OBC, DC-DC, electric drive, BMS, PTC heating, etc.) • New energy (photovoltaic inverters, energy storage, wind power converters, EV charging stations) • Consumer electronics (air conditioners, microwave ovens, washing machines, computers, gaming consoles, etc.) • Medical equipment (MRI machines, ventilators) • Other switching power supplies (communication power supplies, UPS, server power supplies, aircraft power supplies, rail transit)

• Excellent anti-saturation: High saturation flux density Bs (1.2 T–1.5 T); permeability μ flexibly adjustable, helping reduce common-mode inductor volume. • Excellent frequency characteristics: Outstanding permeability performance in the 10 kHz–120 MHz frequency range. • Stable temperature characteristics: Small performance change rate in the −40°C to 180°C temperature range. • Low magnetostriction coefficient, low noise: Saturation magnetostriction coefficient λs is close to zero.
Evans Core
Amorphous/Nanocrystalline C-Type Cores

Application Fields • Amorphous reactors in photovoltaic inverters • Output filter reactors in medium-frequency high-power switching power supplies • Medium-frequency high-power PFC reactors • Inductors in new energy vehicles • Power transformers in rail transit • Current transformer cores; high-frequency transformers

• High saturation flux density Bs — enables high power density inductor design • Rectangular cut structure — facilitates coil winding and assembly of inductors • Segmented air gap in the core — reduces the effect of air gap leakage field on temperature rise • Low loss — reduces inductor temperature rise
Block core
Amorphous/Nanocrystalline Block Cores

• Block combination hybrid magnetic circuit inductor cores • Center-column decoupling cores for hybrid magnetic circuits in photovoltaic inverter inductors • Center-column flux leakage slabs for differential-common-mode integrated inductors

• High permeability • High saturation flux density • Low loss
trafo core
Nanocrystalline High-Frequency Transformer Cores

• Inverter welder power transformers • X-ray power transformers, laser power transformers, pulse power transformers • Uninterruptible Power Supply (UPS) transformers • High-frequency induction heating power transformers • Electrolytic plating power transformers • Variable frequency drive power transformers • Plasma cutting machine transformers

• High saturation flux density — reduces component size and weight • High permeability — reduces magnetizing current, improves efficiency • Low remanence — achieves larger ΔB, reduces volume and weight • Low loss — reduces transformer temperature rise, improves efficiency • Good temperature stability — operates normally from −40°C to 180°C
ring core choke
Ring Core Chokes

NC-CMC 1-phase (0.6–38 A) · NC-CMC 3-phase · AM-CMC (ETO) · DMC (ETO) · Power Inductors · Transformer Cores. Each with tech highlight: "57–72 % smaller than ferrite equivalent.

Current up to 20 A · Inductance 1–100 mH · IPC/CECC compliant

About Merton Technik
The story behind

Merton Technik is the exclusive German and EU distribution partner of Yunlu Advanced Materials. Founded by power electronics engineer Felix Wedel, the company bridges Chinese manufacturing scale and German application engineering.

We are based in Munich, Germany, with (planned) local warehouse capacity and German/English-speaking technical support across Germany and the EU. Our focus: making it easier for European OEMs to specify, qualify, and integrate world-class magnetic components.

DIN EN
ISO 9001
TÜV
certified
VDI
Member
KM
Dipl.-Ing. Felix Wedel
Managing Director & Founder
"Our customers don't buy a core. They buy a working inverter, a certified appliance, a transformer that meets Tier 2. We're here to make that integration painless — first time, on time

Selected Projects

NC-CMC in washing machine inverters
White Goods · 2025
Amorphous transformer cores for transformer manufacturers
Energy · 2026

Have a project?

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Send an email +49 (151) 474 28 674