Xi'an, Shaanxi, China · OEM / ODM Transformer & Power Supply Manufacturer [email protected]  |  ✔ Intertek-Verified Supplier

China Best Step Up & Step Down Transformer Factories & Supplier for the Fort Worth Market

Intertek-Verified OEM/ODM Power Magnetics, Industrial Step-Up/Step-Down Voltage Converters, and Heavy-Duty SMPS Built to North American Electrical Standards and Texas Heavy Industry Specifications.

Export Catalog

Featured Voltage Conversion & Regulated Power Systems

Direct from Xi'an manufacturing lines to Fort Worth, Arlington, and the greater DFW industrial corridor. Explore our proven high-frequency, DIN rail, chassis, and wall-plug power solutions engineered for high efficiency and continuous duty.

5V 2A 10W AC DC Switching Power Adapter Wall Plug Class VI 100-240V CE FCC

5V 2A 10W AC DC Switching Power Adapter Wall Plug Class VI 100-240V CE FCC

Input: 100–240 VAC Universal (50/60 Hz) Efficiency: US DOE Level VI Compliant Protection: OVP, OCP, SCP with Auto-Recovery
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Neon Transformer Waterproof Power Supply 24vdc Power Supply

Neon Transformer Waterproof Power Supply 24vdc Power Supply

Ingress: IP67 Sealed Aluminum Housing Output: 24 VDC Ultra-Low Ripple High-Voltage Isolation Duty: Commercial Neon, Architectural LED & Signage
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AC DC Switch Mode Power Supply 12V 24V 48V 1A to 50A

AC DC Switch Mode Power Supply 12V 24V 48V 1A 2A 3A 5A 10A 20A 30A 40A 50A 24vdc Power Supply

Topology: Industrial SMPS Metal Perforated Cage Outputs: 12V / 24V / 48V Configurable DC Rail Design: Active PFC, High Dielectric Isolation
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12V 1A AC DC Switching Power Adapter Wall Plug Class VI 100-240V CE FCC

12V 1A AC DC Switching Power Adapter Wall Plug Class VI 100-240V CE FCC

Form Factor: Compact US 2-Pin Wall Mount Application: Telecom Routers, Security Cameras, IoT Hubs Certifications: CE, FCC, RoHS, Class VI Standard
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HDR-15-24 Rail Power Supply

HDR-15-24 Rail Power Supply

Mounting: TS-35/7.5 or TS-35/15 DIN-Rail Mount Control: Industrial Automation Enclosure Compatible Standard: Ultra-Slim Step Shape (1SU Width)
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Adjustable 600W 12V 50A Switching Power Supply

Adjustable 600W 12V 50A Switching Power Supply AC/DC Regulated Power Source with Display

Rating: 600W High-Density with Digital Readout Control: Potentiometer Voltage/Current Trimming Target: CNC Rigs, Laboratory Benches, Battery Racks
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9V 2A Adapter Power Supply AC DC 5V 9V 12V 15V 24V Adaptor

9V 2A Adapter Power Supply AC DC 5V 9V 12V 15V 24V 1A 2A 3A 4A 5A 6A 8A 10A Adaptor

Outputs: Multi-Voltage Selectable / Custom Tuned Safety: IEC 62368-1 Certified Double Insulated Jack Size: 5.5×2.1mm / 5.5×2.5mm Tuning Options
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Fullstar 5V Power Supply 2A Power Adapter US Plug With Ferrite Core

Fullstar 5V Power Supply 2A Power Adapter US Plug, 5.5*2.1mm With Ferrite Core 2m Cable

EMI Mitigation: Molded Solid Ferrite Bead Choke Cord: Heavy-Duty 2.0-meter 20AWG Pure Copper Cable Endurance: Class H Insulation, 100% Full-Load Aged
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100%
Hi-Pot Dielectric Tested
4.8/5
Verified Buyer Satisfaction
<0.18%
Field Failure Rate
25+
Precision Testing Stations
Engineering Whitepaper

Step-Up & Step-Down Transformer Engineering for the Fort Worth Industrial Sector

In-depth electromagnetic analysis, thermal dynamics, and grid conversion standards bridging Chinese manufacturing capabilities with Tarrant County's mission-critical manufacturing facilities.

Grid Step-Down Conversion: 480V to 240V/120V

Industrial parks across North Fort Worth and the Alliance Texas logistics hub operate primarily on 480V 3-phase commercial mains. Heavy machine automation, robotics, PLC racks, and localized instrumentation require precision dry-type or toroidal step-down transformers to establish stable 240V, 208V, or 120V split-phase secondary circuits.

  • Elimination of zero-sequence harmonics via delta-wye configurations.
  • Low eddy-current loss using grain-oriented silicon steel (M4/M5 grades).
  • Electrostatic copper foil shielding preventing capacitive transient transfer.

Machine Import Step-Up Systems: 208V/240V to 380V/415V

Fort Worth contract manufacturers and aerospace tier-2 suppliers frequently import European and Asian computer numerical control (CNC) equipment, laser cutting beds, and automated packaging systems calibrated exclusively for 380V, 400V, or 415V 50Hz/60Hz supplies. Our step-up autotransformers and isolation transformers eliminate equipment re-engineering costs.

  • High magnetic saturation thresholds mitigating core excitation spikes.
  • Class H 180°C and Class N 200°C vacuum pressure impregnated (VPI) varnishing.
  • Minimal voltage regulation drop (<3.5% under dynamic step loading).

Switch-Mode & Toroidal Magnetic Innovations

For high-frequency aerospace flight-line test rigs and medical equipment in Fort Worth's medical district, conventional lamination designs radiate unwanted magnetic stray flux. Zelqo designs custom toroidal wound-core transformers and high-frequency ferrite flyback assemblies featuring near-zero audible hum and ultra-low stray magnetic leakage fields.

  • Distributed gap core geometry reducing no-load core losses up to 45%.
  • Custom bobbins utilizing reinforced triple-insulated winding wire (TIW).
  • Precision gapping and LCR testing to minimize leakage inductance.
Transformer Architecture Primary Topology Typical Efficiency Harmonic Attenuation Thermal Rise (ΔT) Fort Worth Market Best Fit
Toroidal Step-Up/Down Continuous CRGO Toroid 96.8% – 98.4% Superior (<1% THD) 45°C – 60°C Avionics Test Rigs, Hi-Fi Acoustics, Medical Electronics
EI Silicon Steel Laminated EI Silicon Core (Interleaved) 91.5% – 94.2% Moderate (Class G) 65°C – 80°C Control Cabinets, Machine Tool Automation, HVAC Panels
High-Frequency Ferrite (EE/PQ) Flyback / Forward / LLC 93.0% – 96.5% High (Integrated Choke) 50°C – 70°C Embedded SMPS, Telecom Power, EV Auxiliary Systems
Heavy-Duty Auto-Transformer Single-Winding Tapped Core 97.5% – 99.1% Standard 40°C – 55°C Imported European CNC Systems, Industrial Freight Elevators
Localized Industrial Ecosystem

Mission-Critical Deployment Across Fort Worth's Economic Clusters

From Lockheed Martin Aeronautics flight-test corridors to the sprawling automated distribution networks of AllianceTexas, precision voltage conversion and reliable power electronics form the bedrock of North Texas industry.

Aerospace, Defense & Flight Support Systems

Fort Worth houses premier aerospace manufacturing, defense research, and tactical flight-line maintenance. Ground support electronics, radar calibrations, and RF communications benches operate on precise DC bus systems and 400Hz/60Hz AC step-down conversions where noise filtering is paramount.

Shaanxi Zelqo Power delivers encapsulated toroidal isolation transformers that suppress line transients, maintaining dielectric insulation tested up to 4,000 VAC, safeguarding multi-million dollar avionics arrays against grid perturbations.

Smart Logistics, AGVs & Alliance Corridor Automation

The AllianceTexas inland trade hub and regional distribution nodes rely on 24/7 automated guided vehicles (AGVs), multi-tier sortation conveyors, and motorized sorting pulleys. These installations demand rugged DIN-rail power supplies (like our HDR-15-24 series) and robust step-down control transformers.

Our solutions provide constant-voltage regulation over wide input variations (85V–264V AC), with integrated short-circuit and thermal overload self-recovery, eliminating costly downtime in high-throughput fulfillment centers.

Metal Fabrication, CNC Machining & Advanced Tools

Tarrant County's expansive metal forming, toolmaking, and plastic extrusion plants rely heavily on multi-axis machining centers. Interfacing multi-voltage foreign machinery to Texas shop-floor 480V 3-phase buses necessitates custom multi-tap autotransformers and low-frequency EI transformers.

Zelqo custom-winds high-capacity step-up and step-down units utilizing heavy enameled copper conductor wire and vacuum varnish baking, ensuring zero turn-to-turn shorting even under harsh harmonic distortion from VFDs (Variable Frequency Drives).

Texas Grid Adaptation & Extreme Weather Hardening

The Electric Reliability Council of Texas (ERCOT) grid faces extreme seasonal shifts—from sub-freezing winter polar vortex events to blistering summer heat waves exceeding 105°F (40.5°C). Industrial power supplies must withstand wide ambient temperature swings without thermal trip-outs.

All Zelqo industrial-grade units undergo 100% full-load burn-in at elevated temperatures, utilizing military-grade electrolytic capacitors rated at 105°C and low-temperature coefficient silicon magnetic cores, ensuring reliable sub-zero cold starts and mid-summer stability.

DFW Market Trends

Strategic Sourcing: Direct Chinese Factory Precision vs. Domestic Distribution Markups

North Texas procurement directors and OEM design engineers face ballooning costs and prolonged 26-to-40 week lead times from domestic US catalog distributors. Working directly with Shaanxi Zelqo Power Co., Ltd. bypasses intermediaries, providing direct engineering-to-engineering collaboration at factory-direct pricing.

With express air-freight corridors directly into DFW International Airport for rapid prototyping and regular maritime intermodal shipping through the Port of Houston, Fort Worth enterprises receive customized transformer runs in 3 to 5 weeks rather than half a year.

Furthermore, each batch includes certified factory test certificates, comprehensive LCR bridge reports, Hi-Pot isolation validations, and full material compliance documentation required by corporate compliance departments.

Shaanxi Zelqo Power Factory headquarters and engineering operations
Manufacturing Transparency

Precision Manufacturing & Testing Rigor at Zelqo Power

Shaanxi Zelqo Power Co., Ltd. is an Intertek-verified custom manufacturer in Xi'an, China. We do not relabel generic catalog items. We calculate, wind, pot, and test every transformer and power adapter to project specifications.

Automated CNC Winding

Computerized multi-spindle and circular toroidal winding machinery ensures uniform tension, consistent turn-counts, and tight magnetic coupling across high-volume production batches.

Hi-Pot & Dielectric Testing

Every single step-up, step-down, and isolation unit undergoes high-potential dielectric breakdown testing up to 3,750 VAC (primary to secondary) to eliminate dielectric breakdown risks in the field.

Impulse & LCR Verification

Precision digital bridges measure primary/secondary inductance, leakage inductance, and DC winding resistance. Impulse surge testers verify inter-turn insulation integrity.

100% Full-Load Aging

All switching power supplies and AC-DC power adapters run under 100% continuous rated load inside automated thermal burn-in chambers for 4 to 8 hours before final inspection.

Shaanxi Zelqo Power factory production workshop overview

Full In-House Engineering & Rapid ODM Prototyping

Whether you require a custom 15VA PCB-mount potted transformer for a medical device or a 25kVA chassis step-down transformer for an industrial automation cell, our engineers calculate core geometry, wire gauge, temperature rise, and insulation systems based on your engineering drawings.

We work with CAD, Gerber, schematic diagrams, or physical golden samples. Our Xi'an laboratory builds functional validation prototypes in as fast as 5 business days, complete with full electrical inspection logs.

Procurement Knowledge Base

Frequently Asked Questions by Fort Worth Engineers & Sourcing Managers

Clear answers addressing technical customization, North American electrical safety standards, customs logistics, and lead-time guarantees.

How do your step-up and step-down transformers handle 50Hz to 60Hz frequency discrepancies?
While static transformers alter voltage and cannot change electrical frequency (which is dictated by the grid generator), frequency heavily impacts transformer core flux density (Bmax). A transformer wound purely for 60Hz US mains will saturate and overheat if operated on 50Hz power because flux density is inversely proportional to frequency (B ∝ V/f). Zelqo designs all our export step-up and step-down units with universal 50Hz/60Hz magnetic cores. We calculate the laminations based on 50Hz worst-case flux saturation, allowing Fort Worth equipment operators to run European 50Hz machines on Texas 60Hz power lines with zero thermal runaway.
Can you build transformers and power adapters compliant with UL 508A and IEC 62368-1 standards?
Yes. For industrial control panel builders in Fort Worth complying with UL 508A requirements, we design dry-type control transformers utilizing UL-recognized insulation systems (Class B 130°C, Class F 155°C, and Class H 180°C). Our external power adapters and enclosed switching power supplies adhere strictly to IEC/EN/UL 62368-1 for audio/video and IT equipment, as well as US Department of Energy (DOE) Level VI no-load efficiency and CEC efficiency regulations.
What is the difference between an Autotransformer and an Isolation Transformer for step-down use?
An autotransformer shares a single continuous copper winding that functions as both primary and secondary via voltage taps. It offers a compact footprint, higher electrical efficiency (up to 99%), and lower material cost, making it ideal for stepping 480V down to 380V or 240V when common grounding is permitted. An isolation transformer possesses electrically separated, galvanically isolated primary and secondary windings. It completely isolates the secondary circuit from grid ground faults, suppresses common-mode electrical noise, and is mandatory for sensitive medical, avionics, and high-noise automation environments.
What information is required to get a firm engineering quote and custom prototype?
To provide an accurate technical schematic and quotation, our engineering team requires:
  • Input Parameters: Primary voltage range (e.g., 480V ±10% 3-phase, or 120V single-phase) and frequency (50/60Hz).
  • Output Parameters: Secondary voltage(s), nominal and peak current per winding, total power capacity (VA or Wattage).
  • Topology / Mounting: Toroidal, EI laminated, open frame, DIN-rail, chassis, or encapsulated waterproof housing.
  • Environmental Limits: Maximum ambient temperature (e.g., 50°C for unconditioned Texas plants), enclosure rating (IP20, IP67, NEMA 3R).
  • Compliance Targets: Hi-Pot dielectric test voltage, target safety marks, and anticipated annual lot quantities.
How are shipments dispatched to the Dallas–Fort Worth (DFW) metroplex?
We offer turnkey shipping terms including FOB, CIF, DDU, and DDP (Delivered Duty Paid). Urgent sample builds and low-volume pilot runs are dispatched via express air freight (DHL, FedEx, UPS) arriving at DFW International Airport customs in 4 to 7 business days. High-volume commercial orders are packaged in ISPM-15 compliant heat-treated export crates, shipped ocean freight via the Port of Houston, and railed directly into North Texas intermodal depots for final local warehouse delivery.
Do you offer custom branding, private labeling, and custom wire harnesses?
Yes. As a full-spectrum OEM/ODM manufacturer, Shaanxi Zelqo Power provides private label laser-etched or metal foil nameplates featuring your corporate branding, model numbers, UL/CE marks, and serial barcodes. We also terminate lead wires with custom molex connectors, screw terminal blocks, Anderson plugs, or specialized aviation sockets to allow plug-and-play assembly on your Fort Worth production line.

Power Your Fort Worth Projects with Precision Magnetics

Whether you need a custom prototype evaluated within 5 business days or high-volume transformer manufacturing with guaranteed zero-defect QA, Shaanxi Zelqo Power Co., Ltd. is your verified industrial partner. Connect directly with our power engineering group today.

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