201 PSU Guide: Stainless Steel Enclosures & OEM Power Supply Modules

The phrase '201 PSU' typically refers to two distinct product categories in the B2B market: 201 Grade Stainless Steel enclosures for power supply units and specific OEM linear power supply modules like the PSU 201.

Product Overview

* PSU 201 Module: A compact, fixed-voltage linear power supply designed for OEM integration. It features integrated over-current and over-temperature protection, commonly used in industrial and laboratory equipment Farnell.

* 201 Stainless Steel Enclosures: A cost-effective alternative to 304 stainless steel, frequently used for outdoor distribution boxes and power supply cabinets where price sensitivity is high Judesteel Reidsupply.

Market Trends & Insights

* Cost vs. Durability: The market is seeing a shift towards 201 stainless steel for indoor and dry-environment applications due to it being 20-30% cheaper than 304 grade Rovsun. However, 304 remains the industry standard for high-humidity or corrosive environments due to its superior nickel content Partmfg.

* PSU Market Growth: The global power supply unit market is projected to grow from $35.86 billion in 2025 to $52.19 billion by 2031, driven by rising demand in server and industrial sectors Researchandmarkets.

* Alternative Materials: Ferritic grades like 430 stainless steel are emerging as strong competitors to 201 for basic appliance panels because they offer even lower costs due to zero nickel content Judesteel.

I have compiled detailed lists of 201 stainless steel enclosures and 200W-range power supply units below for your sourcing review.