PQ50 230V To 12V Custom High Power Planar Transformer For Power Energy System

This high frequency power transformer is built on a PQ type ferrite core and is designed for switching power supplies operating in the tens to hundreds of kilohertz range. The PQ geometry gives a large winding window relative to its footprint and a round centre leg, which shortens the mean turn length and lowers copper loss compared with an equivalent EE core of the same power class. The closed magnetic path also keeps leakage flux low, which helps the end product pass radiated emission testing.

The windings are made with litz wire rather than solid magnet wire. At high switching frequency, current in a solid conductor crowds into the outer surface and the effective resistance rises sharply. Litz wire divides the conductor into many individually insulated strands, so the current distributes across the full copper area and AC loss stays under control. This is what allows the transformer to run at high frequency without excessive temperature rise.

Primary and secondary are brought out on flying leads with a plug-in terminal block, so the part can be dropped into a wire harness assembly without a dedicated PCB footprint. The sample shown is marked MTPQ50-301-15166 and carries UL recognition under file E332338 with the CHIPSEN-F insulation system. Turns ratio, inductance, wire construction, lead length, connector model and core size are all defined against the customer drawing or converter specification.

• PQ core geometry delivers a high power density per unit board area, with a short mean turn length that reduces copper loss.
• Litz wire winding suppresses skin and proximity effect, keeping AC resistance and temperature rise low at high switching frequency.
• Closed magnetic circuit with low leakage flux, reducing radiated interference to nearby control and feedback circuits.
• Class F insulation system with UL recognition under file E332338, simplifying safety approval of the end product.
• Reinforced primary to secondary isolation with 3000 V AC withstand capability, adjustable to the applicable safety standard.
• Flying lead and terminal block output allows direct harness assembly without a dedicated PCB footprint.
• Taped and clamped core assembly with varnish impregnation resists vibration and limits audible noise.
• Controlled leakage inductance, important for resonant and flyback topologies where leakage energy affects snubber loss.
• Stable inductance over the working temperature range through core grade selection matched to the operating frequency.
• Full customization of turns ratio, inductance, core size, wire construction, lead length, connector model and labelling.

• Industrial switching power supplies and AC-DC power modules
• Solar inverters, energy storage converters and micro-inverters
• EV chargers, charging piles and on-board charging modules
• LLC resonant, phase shifted full bridge and flyback converter stages
• Telecom and server power supplies with high efficiency targets
• Welding machines, induction heating and other high power equipment
• UPS systems and DC power distribution equipment
• Motor drives, servo controllers and industrial automation power stages
• LED display and high power lighting drivers
• Medical and laboratory equipment power supplies requiring reinforced isolation

• Established in 2000, with 26 years of continuous focus on magnetic components and power solutions for industrial control and power electronics.
• Own 10,000 sqm production base with 8 complete production lines, operating as a manufacturer rather than a trading company.
• Annual transformer output of approximately 2,400KK pcs, giving stable capacity and reliable delivery in peak season.
• Dedicated 20-person R&D team and 20-person QC team, with engineering consultants holding over 26 years of design experience.
• Annual export value of USD 42 million, serving North America (50%), Northern Europe (18%), South America (15%) and Southeast Asia (15%).
• ISO 9001 and ISO 14001 system certification, with CE, CB, UL, cUL and RoHS product certification available.
• Own UL recognised insulation system under file E332338, which shortens the safety approval path for customer equipment.
• Proven customer base including well known appliance and signalling equipment brands and North American inverter manufacturers.
• Trade support with DDP and DDU terms, and payment accepted by T/T, PayPal and Western Union.
• Complete ODM and OEM service from schematic evaluation and sample building to mass production, with MOQ from 1,000 pcs.

• Litz wire construction lowers AC loss where a solid wire design of the same turns count would run significantly hotter.
• Winding structure is arranged to control leakage inductance, which reduces voltage spikes and snubber dissipation in flyback and resonant designs.
• UL recognised insulation system already in place, so the transformer does not become the bottleneck in end product certification.
• Consistent batch to batch inductance through controlled core sourcing, automated winding and 100% electrical testing.
• Lower temperature rise at rated load extends the service life of adjacent electrolytic capacitors and semiconductors.
• Harness ready output reduces assembly time on the customer line compared with soldered pin versions.
• Engineering support on core size selection, turns ratio calculation, flux density margin and thermal evaluation for your topology.
• Cross reference support: send the existing part number, drawing or a physical sample and we will propose a compatible alternative.