ISO 9001 Certified · SGS On-Site Verified Factory

OEM/ODM Enclosed Power Supply Manufacturer & Suppliers

High-Density AC/DC Switching Solutions, Custom Topologies & Tier-1 Industrial Reliability Engineered for Global OEMs (10W to 3000W)

Engineered Product Lineup

Featured Enclosed AC/DC Switching Power Supplies

Tested under 100% full-load burn-in conditions. Designed with perforated aluminum enclosures for optimal thermal dissipation, electromagnetic shielding, and compact footprint integration.

S-Series SMPS S-120-36 AC DC Switching Power Supply

CE RoHS 120W S-120-36 AC DC Switching Power Supply (12V-48V)

120W Output 3.3A @ 36V CE / RoHS
Datasheet → Inquire Now
LED Lighting S-145-12 145W 12V Industrial Switching Power Supply

S-Series S-145-12 145W 12V Industrial Switching Power Supply

145W Constant 12V 12A Rail Low Ripple
Datasheet → Inquire Now
High Current S-200-15 High Quality Power Supply 200W 15V

S-200-15 Single Output SMPS 200W 15V 13.33A for Industrial Automation

200W Heavy Duty 15V 13.33A Overload Prot.
Datasheet → Inquire Now
Telecom Ready WEHO 145w 48v Single Output Ac/dc Switching Power Supply

WEHO 145W 48V Single Output AC/DC Switching Power Supply 3A

48V Standard 3.0A Output Built-in Filter
Datasheet → Inquire Now
Factory Direct 145W AC DC Switching Power Supply S-145-12

S-145 Multi-Voltage Series SMPS 145W (12V/15V/24V/36V/48V 12A)

145W Universal Wide Input OVP / OCP
Datasheet → Inquire Now
Burn-In Tested CE ROHS S-200-36 36V AC to DC Switching Power Supply

CE ROHS S-200-36 36V 0~5.5A Imported Electronic Components SMPS

200W Grade 36V 5.5A 100% Full Load
Datasheet → Inquire Now
Compact Module SMPS S-15-5 Led Driver 15W 5V 3A AC DC

SMPS S-15-5 Enclosed Driver 15W 5V 3A High Frequency Power Unit

15W Micro 5V 3.0A Logic High Frequency
Datasheet → Inquire Now
Dual AC Select S-145-48 Single Output Power Supply AC 110V 220V DC 48V 3A

S-145-48 Single Output Power Supply AC 110V/220V to DC 48V 3A

145W Industrial 110V/220V Switch 48V Precision
Datasheet → Inquire Now
19+
Years Engineering Expertise (Est. 2007)
10,000m²
Floor Space & 10+ Automated SMT Lines
10W–3kW
Enclosed Power Conversion Span
100%
High-Temp Full Load Burn-In Verification
Engineering Whitepaper

Technical Architecture of Modern Enclosed Power Supplies

A comprehensive examination of power density, topological selection, electromagnetic compatibility, and thermal management mechanisms in industrial power electronics.

Topological Efficiency & PFC

Enclosed power supplies (SMPS) operating between 100W and 3000W demand rigorous topological optimization to minimize switching losses and adhere to IEC/EN 61000-3-2 harmonic standards.

  • Active Power Factor Correction (PFC > 0.95 at rated load)
  • LLC Resonant Half-Bridge converters for >90% efficiency
  • Synchronous rectification minimizing secondary diode drop

EMC Immunity & Isolation

In high-noise environments such as motor control and factory automation, enclosed chassis act as Faraday shields, attenuating radiated electromagnetic interference.

  • Compliance with CISPR 32 / EN 55032 Class B emission limits
  • Dielectric Withstand (Hi-Pot): 3000VAC I/P to O/P isolation
  • Surge immunity up to 4kV line-to-earth (IEC 61000-4-5)

Thermal Dynamics & MTBF

The enclosed form factor utilizes honeycomb or hexagonal perforation patterns engineered for chimney-effect natural convection or directed fan forced-air cooling.

  • Electrolytic capacitor longevity rated at 105°C long-life tiers
  • Full thermal derating curves engineered up to +70°C ambient
  • Calculated MTBF exceeding 250,000 hours (MIL-HDBK-217F)
Strategic Procurement

Global Sourcing Trends in Enclosed Switching Power Supplies

B2B technical buyers and system architects are moving away from spot-market buying toward resilient, audited factory partnerships. Discover how future-proof supply chains are structured.

Wide-Bandgap (WBG) Integration

The transition from silicon MOSFETs to Gallium Nitride (GaN) and Silicon Carbide (SiC) semiconductors represents the single largest shift in enclosed power designs. OEMs adopting WBG benefit from 40% reduction in thermal dissipation and 30% reduction in casing dimensions.

Total Cost of Ownership (TCO)

Procurement teams increasingly calculate 5-year running costs rather than simple unit purchase prices. High-efficiency enclosed supplies (>92%) drastically reduce electrical expenditure and thermal load inside control cabinets, decreasing auxiliary HVAC cooling energy.

ESG & Carbon Border Compliance

With tightening Ecodesign regulations, ErP Lot 9, and CBAM cross-border reporting in the EU and North America, buyers require verified BOM (Bill of Materials) transparency, halogen-free PCB substrate options, and recyclability reports from their tier-1 manufacturing source.

Industry Roadmap

Enclosed Power Supply Technology Evolution Roadmap

Comparing legacy enclosed power units against current benchmarks and next-generation specifications.

Evaluation Parameter Legacy SMPS (Pre-2020) Current Benchmark (2024-2026) Next-Gen Trajectory (2027+)
Power Density 5 - 8 W / in³ 12 - 18 W / in³ > 25 W / in³ (GaN/SiC)
Active Efficiency 78% - 84% Typical 88% - 91% (S-Series / LRS) 94% - 96% Ultra-Low Loss
Input Voltage Window 170 - 264 VAC or Manual Switch Universal 85 - 264 VAC / 120-370 VDC Ultra-Wide 85 - 305 VAC (Grid Fluctuation Tolerant)
Diagnostic Capabilities Single DC-OK LED Indicator Relay Dry Contacts / DC-OK Signal Digital Telemetry (PMBus / I2C / Modbus)
Thermal Architecture Bulky Extruded Aluminum Fins Perforated Stamped Convection + Fan Cold-Wall Conduction / Vapor Chamber
Safety Compliance IEC 60950-1 (Obsolescent) IEC / EN / UL 62368-1 Hazard-Based IEC 61558 / IEC 60601-1 4th Ed. Co-Compliance
Enterprise Manufacturing

Why Tier-1 Brands Partner with Zhejiang Harlon Electronic

Backed by over 18 years of specialized export experience, our 10,000m² manufacturing facility in Wenzhou delivers rigorous engineering, in-house PCBA assembly, and end-to-end quality control.

Full OEM / ODM Tailoring

We provide full customization, sample-based customization, design-based customization, and private buyer labeling. Everything from unique rail voltages (e.g. 13.8V, 27.6V, 36V, 48V), terminal blocks, harness leads, to custom mechanical chassis can be rapidly prototyped.

SGS Audited Quality System

Our ISO 9001 certified plant operates on-site incoming material inspection (IQC), automatic SMT surface-mount placement, wave soldering, output voltage adjustment, loaded aging burn-in, and full finished product functional verification.

Reliable Global Export Backbone

Serving long-term B2B partnerships across North America, South America, Central America, and Eastern Europe. We maintain 31 coordinated component supplier alliances to guarantee stable raw component pipelines even during peak global allocation shortages.

Procurement Knowledge Base

Frequently Asked Questions by Purchasing & Engineering Teams

Detailed technical and operational answers to facilitate your supplier assessment and qualification process.

How does Harlon calculate MTBF and operational service life?

Mean Time Between Failures (MTBF) is calculated in accordance with MIL-HDBK-217F standards at an ambient temperature of 25°C under nominal input and full rated load conditions, typically yielding figures between 250,000 and 450,000 hours. The operational life expectancy is predominantly governed by the Arrhenius reaction rate of the internal primary electrolytic smoothing capacitors, specified at 105°C with guaranteed 5,000 to 10,000 hours life, translating to 5-8 years of continuous factory operation when operated within standard thermal derating envelopes.

What protection topologies are built into the S-Series enclosed supplies?

Every enclosed model integrates triple-stage protection circuitry: Over-Current Protection (OCP) operating in hiccup mode or constant current limiting (105%–150% rated load) with auto-recovery; Over-Voltage Protection (OVP) utilizing Zener clamp and optocoupler shutdown to prevent downstream component damage; and Over-Temperature Protection (OTP) on models 150W and above via integrated thermal thermistors mounted directly to the main switching FET heatsinks.

Can Harlon enclosed power supplies be connected in parallel or series?

Standard catalog units can be wired in series to step up total terminal voltage (e.g. two 24V units combined for a 48V rail) with the addition of reverse-biased protection diodes across each output. For parallel load sharing, models designated with internal OR-ing diodes or active current-share pins should be specified during your OEM configuration request to ensure equalized thermal dissipation across adjacent units.

What is the typical NRE and lead time for custom OEM power supply projects?

For minor modifications (custom output voltages, specialized connector assemblies, conformally coated PCBAs for humid or dusty environments, and custom silkscreen/labeling), Non-Recurring Engineering (NRE) charges are frequently waived on standard MOQ commitments, with prototypes delivered in 10-15 business days. Full custom ground-up topologies (custom magnetic cores, specific low-profile mechanical enclosures) typically require 3-4 weeks for engineering prototypes and validation testing.

How does the 100% full-load burn-in process operate on your production floor?

Every completed power supply is transferred to our dedicated high-temperature aging chambers. The units are subjected to 100% full electrical load at +45°C to +50°C ambient temperatures for a continuous cycle (typically 2 to 4 hours depending on client inspection protocols). The testing equipment monitors for instantaneous voltage drops, transient fluctuations, and thermal runaway, effectively screening out infantile electronic component mortality prior to packaging.

What international trade and logistics terms are supported for export orders?

We routinely accommodate standard Incoterms including FOB (Ningbo / Shanghai / Shenzhen), CFR, CIF, EXW, and DDU door-to-door air and sea freight. Payment mechanisms supported for international distributors include T/T wire transfer, L/C at sight, and escrow. Comprehensive export document packages—including commercial invoices, packing lists with net/gross weights, certificates of origin (CO / Form E / Form F), and CE/RoHS declarations—are supplied with every dispatch.

Ready to Engineer or Source Your Enclosed Power Supply Solution?

Whether you need catalog model samples (15W to 200W) or a fully customized 3000W high-power industrial power system, our engineering team responds within 24 hours with comprehensive datasheets, thermal derating reports, and competitive volume quotation matrices.

Inquire Now