COSEL ASIA LTD.
Cosel's Strength
Why Top Engineers Choose COSEL Power Supplies
With over 50 years of experience, COSEL is more than a manufacturer — we're a trusted partner in powering the world's most demanding technologies. From medical devices to semiconductor tools, industrial automation, telecom, and rail systems, our power supplies are built to perform where failure isn't an option.
- Proven Reliability and Massive Product Selection
- Customizable Solutions and Engineer-Backed Support
- Cutting-Edge Technology and Find the Right Fit — Fast
What Sets Cosel Apart?
Decades of field-tested performance across mission-critical industries.
Over 22,000 models across 110 categories — plus 380 optional parts to fine-tune your solution.
If our standard lineup doesn't fit, we'll modify it to meet your exact specs.
Real technical support from real engineers — not just sales reps.
High-efficiency switching, advanced EMI filtering, and sulfuration-resistant designs for harsh environments.
Whether you're optimizing for size, cost, or application-specific requirements, COSEL makes it easy to find the right power supply — and back it with support that actually understands your design challenges.
Find the most suitable power supply
Extensive Product Lineup
We offer a wide range of standard products—110 categories, 478 sub-categories, and 22,292 models (as of January 2024).
Based on your requirements for size, cost, and application, combined with 380 optional parts, we can provide the most suitable product solution. If our standard products do not meet some of your needs, Cosel offers modification solutions.
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Enclosed Type
Power Supply39 Classes / 162 Sub-Classes /
16,539 Models
360 Optional parts -
On-board Type
Power Supply44 Classes / 163 Sub-Classes /
3,947 Models
20 Optional parts -
EMI Filters
27 Classes / 153 Sub-Classes /
1,806 Models
Our products place a high emphasis on reliability, both in component selection and overall design
- Enhanced Sulfuration Resistance: We strengthen the anti-sulfuration performance of our components. This reduces failure rates, even in equipment with high sulfur content.
- Key Components' Lifespan: Critical components like electrolytic capacitors and fans undergo individual lifespan testing. We focus on the expected lifespan of each during the design phase.
Equipment Highlights
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X-ray Fluorescence Analyzer
Ensures that the chemical composition of components complies with relevant regulations.
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PCT Tester
Conducts highly accelerated lifespan tests on parts used in new products.
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Automated Test System
Automatically inspects and confirms the characteristics of new products.
Provide various support
Proactive Customer Support
While we strive to develop high-quality products, we are also committed to working closely with you to tackle any challenges, from product selection to mass production and post-sales support
- Engineer on-site visits: Our engineers will visit you to offer personalized assistance.
- EMI Testing Assistance: We provide support for Electromagnetic Interference (EMI) testing.
- Anechoic Chamber Use: Access to anechoic chambers for accurate testing.
- EMI and Peripheral Circuit Design Support: Guidance on designing EMI and peripheral circuits.
- Circuit and Modification Design Advice: Recommendations for circuit modifications and redesigns based on your specific needs.
In the event of any product issues, we will conduct thorough testing and analysis, providing detailed analysis reports to help you resolve the problem efficiently
Equipment Highlights
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Anechoic Chamber
Confirms EMI characteristics
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X-ray CT Diagnostic Equipment
Observes the internal condition of components during failures
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Microscope
Detects scratches and measures shapes in micron units
Delivering peace of mind backed by our advanced technological capabilities
High-Quality Technical Capabilities
Cosel's core philosophy is quality first, and it is consistently dedicated to product research and development. At our R&D center, over 250 engineers are engaged in developing high-quality products and providing customer support
R&D Center
Consistent Commitment to Improvement
- Continuous Improvement Awareness: Quality control activities are conducted throughout the company to foster a mindset of proactive improvement
- Gold Award at the JHS All Japan Selection Quality Control Circle Conference (2020)
- Multiple Ishikawa Kaoru Awards for quality control damati
Leave all your worries about switching power supplies behind with Cosel!
