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

CE Certified Enclosed Power Supply Suppliers & Exporter

Industrial-Grade Reliability, Precision Thermal Dynamics & Global OEM/ODM Engineering by Shaanxi Zelqo Power Co., Ltd.

Engineered Catalog

Precision Enclosed Power Conversion Systems

Tested under continuous load, 100% full-load burn-in aged, and certified to meet stringent Low Voltage Directive (LVD 2014/35/EU) and Electromagnetic Compatibility (EMC 2014/30/EU) standards.

DIN-Rail 60W 120W 240W EDR Din Rail Power Supply 12v 24V for CCTV Application

60W 120W 240W EDR Din Rail Power Supply 12v 24V for CCTV Application

Ultra-slim TS-35 rail mount enclosure with built-in active overcurrent, short-circuit, and primary isolation engineering.

12V / 24V TS-35 Rail CE / EMC
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Heavy Industrial 360W Switch Power Supply 10A 20A 30A 50A High Efficiency LED Power Supply Chinese Factory Industrial

360W Switch Power Supply 10A 20A 30A 50A High Efficiency LED Power Supply Chinese Factory Industrial

Perforated aluminum alloy chassis delivering passive convective dissipation with low ripple ripple-noise suppression.

360W Heavy Load 10A-50A LED & Factory
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Adjustable Adjustable Power Supply Single-phase Rail Power Supply Din Rail 60w 100w 200w 300w 400w 500w 1000w Power Supply

Adjustable Power Supply Single-phase Rail Power Supply Din Rail 60w 100w 200w 300w 400w 500w 1000w Power Supply

Single-phase wide-input modular power unit spanning 60W up to 1000W with precision potentiometer calibration.

60W-1000W Modular Rail Potentiometer
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Class VI 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

Compact wall-plug adapter meeting Level VI energy efficiency criteria, fire-retardant enclosed PC casing, and universal 100-240V AC.

5V 2A Class VI Ready CE & FCC
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Digital Display Adjustable 600W 12V 50A Switching Power Supply AC/DC Regulated Power Source with Display for LED Strip, CCTV, Industrial Control

Adjustable 600W 12V 50A Switching Power Supply AC/DC Regulated Power Source with Display for LED Strip, CCTV, Industrial Control

Intelligent digital real-time voltage and current telemetry readout, forced-air cooling fan, and over-temperature auto shutoff.

600W 50A Digital Meter Smart Cooling
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Slim Enclosed DC 12V 24V Lighting Transformer AC 110V 220V Switching Power Supply 1A 2A 3A 5A 6A 8A LED Power Adapter for LED Strip Light

DC 12V 24V Lighting Transformer AC 110V 220V Switching Power Supply 1A 2A 3A 5A 6A 8A LED Power Adapter for LED Strip Light

Constant-voltage low-profile architecture engineered for linear lighting extrusions with ultra-low THD harmonics.

12V / 24V 1A-8A Range Flicker-Free
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Universal DC 5V 6V 9V 12V 15V 16V 18V 19V Switch DC Power Adaptor 500mA 1A 1.2A 1.5A 2A 2.5A 3A Power Adapter

5V 6V 9V 12V 15V 16V 18V 19V Switch DC Power Adaptor 500mA 1A 1.2A 1.5A 2A 2.5A 3A Power Adapter

Multi-tap precision stepping voltage adapter with universal international tip configurations and short-circuit clamp circuitry.

5V-19V Multi Up to 3A Versatile DC
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Regulated Adaptor 12V 2000mA Power Adapter 24W Adaptor 5V 6V 9V 12V 24V Power Supply

12V 2000mA Power Adapter 24W Adaptor 5V 6V 9V 12V 24V Power Supply

High MTBF isolated SMPS plug engineered for automation controllers, network routers, security matrices, and instrumentation.

24W Output 12V 2A Low Standby
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The Architecture of Compliance: Deconstructing CE Certification in Enclosed SMPS

In modern industrial topology, an enclosed power supply serves as the primary barrier between erratic municipal utility grids and delicate downstream logic controllers, industrial motherboards, and sensitive field sensors. Achieving legitimate Conformité Européenne (CE) marking for an enclosed switching power supply (SMPS) requires adherence not just to theoretical performance claims, but to verifiable physical containment, robust insulation barriers, and stringent harmonic attenuation.

Under the European Union regulatory framework, an enclosed power supply intended for international distribution must satisfy two non-negotiable statutory pillars: the Low Voltage Directive (LVD) 2014/35/EU—harmonized under the rigorous umbrella of EN 62368-1 (Audio/video, information, and communication technology equipment) and EN 61558-1 / -2-16 (Safety of transformers, reactors, power supply units)—alongside the comprehensive Electromagnetic Compatibility Directive (EMC) 2014/30/EU.

Information Gain Insight: While commodity manufacturers frequently cut corners by utilizing commercial grade secondary capacitors (rated at only 85°C) and omitting two-stage common-mode line chokes, genuine industrial-grade enclosed SMPS architectures leverage 105°C ultra-low ESR electrolytic capacitors combined with dedicated transient voltage suppressors (TVS) and varistors (MOV) at the primary AC stage. This topology guarantees over 50,000 hours Mean Time Between Failures (MTBF) even in elevated ambient operating zones up to 60°C.

Dielectric isolation forms the core of human and equipment safety. Enclosed supplies manufactured by Shaanxi Zelqo Power Co., Ltd. are engineered with strict primary-to-secondary clearance and creepage distances exceeding 6.4mm, verified via 100% automated factory Hi-Pot flash testing at 3,000V AC to 3,750V AC. Furthermore, the metallic enclosure is not merely an external chassis—it acts as an integrated Faraday shield and thermal dissipation heatsink. The structural perforations are geometrically modeled to maximize thermal convective airflow while preventing the ingress of extraneous conductive debris, maintaining an ingress protection grade suited for industrial switchgear cabinets.

3,750V
Hi-Pot Dielectric Isolation
>91.5%
Peak Operating Efficiency
<30mV
Ultra-Low Output Ripple
100%
Full Load Burn-in Tested

Global Sourcing & Procurement Trends: The 2025–2030 Horizon

Procurement teams within global industrial equipment manufacturing, building management automation, and telecom infrastructure are pivoting away from transaction-based component buying toward total lifecycle value, supply chain transparency, and multi-tier energy accountability. The procurement landscape for enclosed switching units is undergoing systemic transformation across three pivotal axes:

Wide Bandgap (GaN/SiC) Density

Next-generation enclosed power supplies are aggressively integrating Gallium Nitride (GaN) and Silicon Carbide (SiC) semiconductors. These materials allow switching frequencies exceeding 200kHz–500kHz, shrinking passive planar transformers by 40% while slashing thermal dissipation losses by nearly a third.

Digitally Monitored Enclosures

Static power supplies are evolving into intelligent edge nodes. Industrial IoT setups increasingly require embedded digital telemetry (via PMBus, I2C, or onboard visual status monitors) to feed current consumption, thermal hotspots, and electrolytic degradation rates directly into predictive maintenance algorithms.

EU Ecodesign & Carbon Neutrality

European Union ErP Lot 7 standards and tightened No-Load Power Consumption thresholds (<0.21W) mean procurement officers are auditing factory production energy matrices, demanding lead-free RoHS and REACH verified manufacturing certified directly by third-party bodies.

As raw material volatility impacts transformer magnetic cores (silicon steel vs. ferrite) and copper wiring, international buyers are securing multi-year ODM partner agreements with vertically integrated manufacturers who produce both the wound magnetics and the final assembled enclosed switching modules under a single operational roof.

The Zelqo Advantage

Why Tier-1 Importers Trust Zelqo Power

Headquartered in Xi'an, Shaanxi, China, Zelqo Power combines state-of-the-art transformer manufacturing with advanced automated power assembly lines to provide seamless OEM/ODM services verified by Intertek.

On-Site Intertek Verified Operations

Our production facilities, testing capabilities, and commercial legitimacy are independently audited and verified on-site by Intertek. Buyers bypass middlemen and trade brokers, securing direct factory-floor accountability.

End-to-End Vertical Magnetics Integration

Unlike standard power pack assemblers who outsource critical flyback and isolation transformers, Zelqo winds, varnishes, pots, and tests our proprietary toroidal, high-frequency, and low-frequency transformers in-house with dedicated CNC machinery.

Rigorous Multi-Stage QC & Full-Load Aging

Every single batch undergoes incoming raw material screening, automated LCR bridge inductance sweeps, impulse inter-turn breakdown testing, automated 4-hour full-load thermal burn-in, and final precision digital power meter validation.

4.8/5 Verified Buyer Satisfaction Score

Supported by a responsive engineering-led sales group operating on rapid response cycles, we assist with schematic optimization, safety certification submissions, custom terminal housings, and custom private-label silk-screening.

Frequently Asked Questions: Enclosed Power Supply Sourcing

Technical guidance for electrical engineers, system integrators, and strategic procurement managers looking to validate specifications before initiating pilot sample orders.

How do you distinguish authentic CE certification from self-declarations?
Authentic CE certification for enclosed industrial power units requires an exhaustive Declaration of Conformity (DoC) backed by complete Test Reports from an accredited ISO/IEC 17025 testing laboratory. These reports must evaluate compliance under EN 62368-1 for the Low Voltage Directive and EN 55032 / EN 55035 for Electromagnetic Compatibility (Class B conducted and radiated emission limits). Zelqo provides genuine, trace-verifiable test reports detailing specific test conditions, conducted EMI sweeps, and Hi-Pot isolation data.
What cooling topologies are implemented in your enclosed industrial series?
For enclosed units rated up to 350W–400W, we utilize passive natural convection cooling achieved through optimized aerodynamic perforation spacing on our anodized or zinc-plated steel/aluminum enclosures. For heavy-duty models exceeding 500W to 1000W (such as our 600W 12V 50A adjustable industrial source), an internal low-noise, temperature-controlled dual-ball-bearing DC brushless cooling fan is activated automatically once internal thermistors detect junction temperatures above 50°C.
How does in-house transformer manufacturing benefit power supply reliability?
The high-frequency transformer is the single most common failure point in switched-mode power supplies. Because Zelqo Power is an established designer and manufacturer of custom toroidal, low-frequency, and ferrite core transformers, we tightly control winding tension, multi-layer margin taping, triple-insulated wire (TIW) placement, and vacuum varnish impregnation. This guarantees that inter-winding parasitic capacitance is suppressed, keeping EMI low and completely preventing internal dielectric breakdown under utility surge transients.
Can your enclosed power supplies be customized for non-standard DC voltages?
Yes. Beyond standard 5V, 12V, 24V, 36V, and 48V outputs, our ODM engineering team readily calculates custom winding configurations, feedback loop resistors, and output filter stages to deliver bespoke voltages such as 15V, 18V, 28V, 60V, or 110V DC. In addition, our adjustable rail and desktop series offer onboard multiturn trimmers or digital displays enabling precise calibration across wide functional spans.
What is the typical sample turnaround time and minimum order quantity (MOQ)?
For rapid circuit prototyping, standard catalog and minor-customization enclosed power supply samples are dispatched within 3 to 7 working days with full measurement and QA documentation. Mass production batches accommodate flexible initial order quantities starting from 50 to 100 units for specialized configurations, scaling seamlessly to multiple 40-foot shipping containers per month for multinational OEMs.

Ready to Engineer Your Custom Enclosed Power Solution?

Connect directly with our engineering department in Xi'an. From custom footprint constraints and extreme temperature specifications to complete OEM branding and bulk export pricing, we deliver verifiable performance built around your exact electrical bill of materials.

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