Top 5 M Itx Power Supply Manufacturers 2026

The global mini-ITX power supply market is experiencing steady growth, driven by rising demand for compact, high-efficiency computing systems in industrial automation, edge computing, and embedded applications. According to Mordor Intelligence, the global small form factor (SFF) power supply market is projected to grow at a CAGR of over 6.8% from 2024 to 2029, fueled by advancements in thermal management and increasing adoption in OEM and defense sectors. Additionally, Grand View Research estimates that the broader power supply market will expand at a CAGR of 5.2% from 2023 to 2030, citing rising energy efficiency regulations and the proliferation of compact PCs as key drivers. Within this niche, mini-ITX power supplies represent a critical component, balancing space constraints with reliable power delivery. As demand for smaller, more efficient systems intensifies, a select group of manufacturers have emerged as leaders in innovation, performance, and reliability—shaping the top five mini-ITX power supply brands in today’s competitive landscape.

Top 5 M Itx Power Supply Manufacturers 2026

(Ranked by Factory Capability & Trust Score)

#1 Mini-Box.com – Mini-ITX

Trust Score: 60/100
Domain Est. 2002

Mini-Box.com - Mini-ITX

Website: mini-box.com

Key Highlights: Mini-Box.com design and manufacture a wide range of Mini-ITX products: Embedded Systems, Mini-ITX Power Supplies, Car PC Solution….

#2 store

Trust Score: 60/100
Domain Est. 2002

store

Website: mini-itx.com

Key Highlights: Mini-ITX Online Store – Hardware for your Mini-ITX Project from the UK’s Leading Store. Order Before 3pm for Same Day Shipping Worldwide!…

#3 ATX 3.1 & PCIe 5.1 Power Supply, PC Case, PD Charger …

Trust Score: 60/100
Domain Est. 2007

ATX 3.1 & PCIe 5.1 Power Supply, PC Case, PD Charger ...

Website: fsplifestyle.com

Key Highlights: FSP is one of the leading suppliers of power supplies, pc cases, PD chargers/adapters, cooling products and UPS. Experience unbeatable gaming performance….

#4 MINI

Trust Score: 60/100
Domain Est. 2010

MINI

Website: itxpower.net

Key Highlights: MINI-ITX Power —- Micro ATX Power Supply 230W ; Model:LPMA230 ; AC INPUT, 115V/230V 10A/6A 50-60Hz ; DC OUTPUT, +12V ; 230W, MAX COMINEO WATTS, 11A ; 230W, MAX…

#5 Pico Box

Trust Score: 60/100
Domain Est. 2012

Pico Box

Website: pico-box.com

Key Highlights: The small size, silent and smart plugin DC-DC ATX power supplies simplify the cable harness inside the PC chassis….


Expert Sourcing Insights for M Itx Power Supply

M Itx Power Supply industry insight

H2: 2026 Market Trends for Mini-ITX Power Supplies

The Mini-ITX power supply (PSU) market is poised for significant evolution by 2026, driven by advancements in computing efficiency, rising demand for compact systems, and innovations in power delivery technologies. As consumer and enterprise preferences shift toward smaller, more energy-efficient, and high-performance computing solutions, the Mini-ITX PSU segment is adapting to meet these changing requirements.

  1. Growth in Compact and High-Performance Systems
    The increasing popularity of small form factor (SFF) PCs—used in gaming, home theater setups, edge computing, and industrial applications—is a primary driver for Mini-ITX PSU demand. By 2026, the continued miniaturization of components and advancements in thermal management will enable more powerful systems in smaller chassis, directly influencing the need for efficient, high-wattage Mini-ITX power supplies. Manufacturers are responding with higher-density designs capable of delivering 750W to 1000W in SFX or Flex-ATX form factors.

  2. Adoption of SFX-L and Flex-ATX Standards
    While traditional SFX power supplies dominate the Mini-ITX space, the SFX-L (long version) and emerging Flex-ATX standards are gaining traction due to improved compatibility with larger GPUs and better airflow in compact builds. By 2026, Flex-ATX PSUs are expected to see broader adoption in commercial and industrial applications where space, efficiency, and reliability are critical. These form factors offer better thermal performance and higher efficiency ratings, aligning with global energy regulations.

  3. 80 PLUS Titanium and GaN Technology Integration
    Energy efficiency remains a key focus. By 2026, the prevalence of 80 PLUS Titanium-certified Mini-ITX PSUs—offering up to 94% efficiency under typical loads—will increase, especially in data centers and edge computing environments. Gallium Nitride (GaN) transistors are being integrated into PSU designs to reduce size, improve thermal performance, and boost efficiency. GaN-based Mini-ITX PSUs are expected to become more mainstream, targeting high-end SFF enthusiasts and professional users.

  4. Modularity and Customization
    Fully modular Mini-ITX PSUs are becoming standard, allowing users to optimize cable management in tight spaces. By 2026, customization options such as customizable fan curves, RGB lighting, and firmware-upgradable controls will differentiate premium products in the consumer market. OEMs are also offering tailored PSUs for specific chassis or systems, enhancing compatibility and performance.

  5. Rise of AI and Edge Computing Demand
    The expansion of AI inference at the edge and compact workstations for machine learning tasks is creating demand for reliable, high-efficiency Mini-ITX PSUs. These systems often require sustained power delivery in constrained environments, pushing PSU manufacturers to develop robust, low-noise solutions with excellent transient response and stable voltage regulation.

  6. Sustainability and Regulatory Pressures
    Environmental regulations such as the European Union’s Ecodesign Directive are pushing manufacturers to improve PSU efficiency and reduce standby power consumption. By 2026, most new Mini-ITX PSUs are expected to meet or exceed Level VI efficiency standards. Recyclable materials and modular designs that extend product lifespans will also become more common.

  7. Market Competition and Pricing Trends
    Increased competition from both established brands (e.g., Corsair, SilverStone, Seasonic) and emerging manufacturers, particularly in Asia, is driving innovation and lowering prices. By 2026, high-efficiency Mini-ITX PSUs will become more accessible to mainstream consumers, though premium models with advanced features will maintain higher price points.

In summary, the 2026 Mini-ITX power supply market will be defined by higher efficiency, greater power density, technological innovation (especially GaN), and alignment with compact computing trends across consumer, industrial, and edge applications. As demand for smaller yet powerful systems grows, Mini-ITX PSUs will play a critical role in enabling next-generation computing solutions.

M Itx Power Supply industry insight

Common Pitfalls When Sourcing Mini-ITX Power Supplies (Quality and IP)

Sourcing a reliable Mini-ITX power supply (PSU) is critical for compact, high-performance, or specialized computing builds. However, buyers often encounter pitfalls related to quality assurance and intellectual property (IP) concerns. Being aware of these issues helps ensure a stable, safe, and legally compliant power solution.

Poor Component Quality and Build Standards

Many low-cost Mini-ITX PSUs, especially from lesser-known brands, use substandard components such as low-grade capacitors, undersized transformers, and inadequate cooling solutions. This leads to reduced efficiency, unstable voltage delivery, and shortened lifespans. Look for units with 80 PLUS certification (Bronze, Silver, or higher) and reputable component brands (e.g., Japanese capacitors) to ensure reliability.

Misleading Efficiency and Power Ratings

Some manufacturers inflate wattage or efficiency claims. A PSU advertised as “300W” may only deliver sustained power under ideal lab conditions and fail under real-world loads. Always verify independent reviews and test reports before purchase. Units without proper certification labels (such as 80 PLUS or CE) are particularly suspect.

Inadequate Thermal Management

Due to their compact size, Mini-ITX PSUs have limited space for heat dissipation. Poorly designed models may lack effective thermal regulation, leading to overheating and throttling—or worse, system shutdowns or component damage. Check for silent or temperature-controlled fan designs and confirm operating temperature ranges in the specs.

Lack of Safety and Compliance Certifications

Counterfeit or non-compliant PSUs often lack essential safety certifications (e.g., UL, CE, FCC, RoHS). These certifications ensure protection against electrical hazards like overvoltage, short circuits, and fire risks. Sourcing from uncertified suppliers increases the risk of equipment damage and potential safety incidents.

Intellectual Property (IP) Infringement Risks

Some third-party or OEM Mini-ITX PSUs clone designs or firmware from established brands without authorization. Using such products may expose integrators or resellers to IP litigation, especially in commercial or enterprise deployments. Always source from authorized distributors or manufacturers with clear IP ownership and proper licensing.

Insufficient Warranty and Support

Low-quality or counterfeit PSUs often come with limited or nonexistent warranties. Reputable brands typically offer 3–10 year warranties and accessible technical support. A lack of support infrastructure can lead to costly downtime, particularly in mission-critical applications.

Counterfeit and Gray Market Products

The compact PSU market is prone to counterfeit units that mimic trusted brands. These may look identical but perform poorly or fail prematurely. Purchase only through authorized channels and verify batch numbers or serials when possible to avoid gray market or fake products.

Avoiding these pitfalls requires due diligence—researching brands, verifying certifications, and sourcing from trusted suppliers—to ensure both performance integrity and legal compliance.

M Itx Power Supply industry insight

Logistics & Compliance Guide for M-ITX Power Supply

This guide outlines the logistics handling, transportation, import/export regulations, and compliance requirements for M-ITX power supplies. Adhering to these guidelines ensures safe, timely delivery and regulatory conformity across global markets.

Packaging and Handling

M-ITX power supplies must be packaged to prevent physical and electrical damage during transit. Use anti-static bags for internal components and rigid outer boxes with cushioning materials (e.g., foam or bubble wrap). Clearly label packages with “Fragile,” “This Side Up,” and ESD (Electrostatic Discharge) warnings. Avoid stacking heavy items on top of packages containing power supplies.

Transportation Requirements

Ship M-ITX power supplies via ground, air, or sea freight depending on urgency and destination. For air transport, ensure compliance with IATA Dangerous Goods Regulations if the unit contains lithium batteries or components classified as hazardous. Most standard M-ITX PSUs are non-hazardous but verify with manufacturer specifications. Maintain stable temperature and humidity during transit to prevent condensation or component stress.

Import and Export Documentation

Prepare accurate documentation for international shipments, including commercial invoices, packing lists, and bills of lading. Include HS (Harmonized System) code 8504.40 for power supply units. Verify export control classifications (e.g., ECCN) under relevant regulations such as the U.S. Commerce Control List (CCL) or EU Dual-Use Regulation. Most M-ITX PSUs fall under EAR99 or equivalent, but confirm with technical specifications.

Regulatory Compliance

Ensure M-ITX power supplies comply with regional safety and electromagnetic compatibility (EMC) standards. Key certifications include:

  • CE Marking (EU): Complies with Low Voltage Directive (LVD) 2014/35/EU and EMC Directive 2014/30/EU.
  • FCC Part 15 (USA): Meets electromagnetic interference standards for digital devices.
  • UKCA (UK): Required for sale in Great Britain; aligns with CE requirements.
  • PSE (Japan): Mandatory for electrical safety under DENAN law.
  • CCC (China): Required for power supply units sold in China.

Maintain compliance documentation (test reports, certificates) for audit and customs inspection.

Environmental and RoHS Compliance

M-ITX power supplies must conform to RoHS (Restriction of Hazardous Substances) directives in the EU, UK, and other jurisdictions. This restricts the use of lead, mercury, cadmium, and other hazardous materials. Ensure suppliers provide RoHS compliance statements and material declarations (e.g., IPC-1752). Also comply with WEEE (Waste Electrical and Electronic Equipment) for proper end-of-life recycling.

Labeling and Marking

Each unit must display required regulatory labels, including manufacturer name, model number, input/output voltage, power rating, safety certification marks (e.g., CE, FCC, CCC), and serial number. Labels must be durable and legible. Include multilingual safety warnings if shipping to non-English-speaking regions.

Customs Clearance and Duties

Work with customs brokers to ensure smooth clearance. Provide accurate product descriptions, value declarations, and origin information. Be aware of duty rates and import taxes, which vary by country. Use Free Trade Agreements (e.g., USMCA, RCEP) where applicable to reduce tariffs. Retain records for a minimum of five years for audit purposes.

Quality and Inspection Protocols

Implement pre-shipment inspections to verify product conformity, packaging integrity, and labeling accuracy. Conduct random sampling based on AQL (Acceptable Quality Level) standards. Address non-conformities before dispatch to avoid customs delays or recalls.

Recalls and Non-Compliance Response

Establish a procedure for handling product recalls or compliance violations. This includes notifying regulatory bodies, issuing customer alerts, and arranging returns or field corrections. Maintain traceability through batch/serial number tracking.

Adhering to this logistics and compliance guide ensures M-ITX power supplies are delivered efficiently and meet all international requirements, minimizing risks and enhancing customer trust.

Declaration: Companies listed are verified based on web presence, factory images, and manufacturing DNA matching. Scores are algorithmically calculated.

In conclusion, sourcing an mITX power supply requires careful consideration of compatibility, efficiency, reliability, and physical constraints. Due to the compact nature of mini-ITX builds, selecting a power supply with the appropriate form factor—such as SFX, Flex ATX, or external adapters—is crucial. Prioritizing units with 80 Plus efficiency ratings ensures better energy conservation and lower heat output, which is especially important in small, enclosed cases. Additionally, opting for reputable brands with strong warranties and reliable customer support helps safeguard your investment and ensures long-term system stability.

Modular cabling can enhance airflow and ease of installation, while adequate wattage and necessary connectors must align with your specific components, particularly the CPU and GPU. Ultimately, choosing the right mITX power supply involves balancing size, performance, and quality to achieve a compact, efficient, and dependable system. With thorough research and attention to specifications, you can source a power supply that perfectly complements your mini-ITX build.

Top 5 M Itx Power Supply Manufacturers 2026

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