Established 1960 · ISO 9001:2015 & ISO 13485 Certified
About Astrodyne TDI
Engineering Excellence Since 1960
Powering & Filtering Demanding Global Applications
For over six decades, Astrodyne TDI has designed and manufactured custom AC/DC power supplies, DC/DC converters, EMI/EMC filters, and toroidal power transformers that safeguard, enhance, and save lives.
Our commitment to rigorous engineering standards, continuous quality management, and customer-focused co-development has made us the trusted OEM partner for world-leading medical device manufacturers, semiconductor fab toolmakers, aerospace defense contractors, and heavy industrial automation developers.
Whether you require ultralow-leakage power supplies for Class III medical devices (IEC 60601-1 3rd/4th Edition), SEMI F47 sag-immune units for semiconductor equipment, or MIL-STD-461 compliant EMI filters for defense systems, Astrodyne TDI delivers proven platforms tailored to your exact operational envelope.
Legacy of Innovation
Six Decades of Engineering Milestones
Strategic expansion and specialized acquisitions have consolidated industry-leading power brands under the unified expertise of Astrodyne TDI.
Transistor Devices Inc. (TDI Power) is founded, pioneering high-reliability, high-power custom power supply platforms for industrial and military defense programs.
RO Associates establishes industry standards in highly durable AC/DC and DC/DC COTS power bricks designed for demanding operating environments.
Jerome Industries introduces custom low-leakage external power adapters tailored specifically for medical patient-connected applications.
LCR Electronics, Filter Concepts, and Radius Power establish leadership in custom and standard single-phase and three-phase EMI/EMC line filters.
Astrodyne TDI officially emerges, merging top-tier power conversion, advanced digital control systems, and EMI suppression capabilities under one globally integrated organization.
Powertronix Acquisition expands our portfolio to include specialized toroidal isolation transformers, custom inductors, and heavy-duty power distribution systems.
Our Foundational Principles
Mission, Vision & Quality Commitment
Every platform engineered at Astrodyne TDI reflects our core values of uncompromised reliability, transparent technical communication, and continuous improvement.
Our Mission
Develop innovative power conversion and EMI suppression technologies that our clients depend upon to protect, enhance, and save lives across demanding global sectors.
Our Vision
To remain the preferred worldwide partner for high-reliability custom power solutions, recognized for technical innovation, operational transparency, and long-term product lifecycle support.
Ethical Conduct
We uphold strict honesty, professional integrity, and compliance across all manufacturing operations, engineering partnerships, and supply chain management practices.
Quality Policy
Maintain ISO 9001:2015 and ISO 13485 quality management systems while ensuring 100% functional testing, strict component traceability, and zero-defect performance goals.
Worldwide Footprint
Global R&D Technical Centers & Manufacturing Hubs
With engineering and production capabilities spanning North America, Europe, and Asia, Astrodyne TDI provides seamless global supply chain continuity and responsive technical support.
North America Headquarters
Hackettstown, NJ & Silicon Valley, CA
- Global Executive & Marketing Offices
- Advanced R&D Engineering Centers
- State-of-the-Art Cleanroom & Assembly
- ISO 9001:2015 & ISO 13485 Certified Production
Asia Manufacturing & R&D
Shenzhen & Kunshan, China & Penang, Malaysia
- High-Volume Automated Assembly Lines
- Custom Magnetics & Transformer Production
- Dedicated EMI Pre-Compliance Test Chambers
- Global Purchasing & Supply Chain Hub
EMEA Technical Center
Munich, Germany
- Regional Application Engineering Center
- Custom Power & EMI Filter Technical Support
- European Regulatory & Compliance Guidance
- Logistics & Direct Regional Support
OEM Partner Feedback
Endorsed by Industry Leaders Worldwide
See how top engineering teams rely on Astrodyne TDI for critical medical compliance, defense reliability, and rapid prototype verification.
"We selected Astrodyne TDI’s engineering team due to their outstanding reputation in low-leakage power supplies. For our Class III implantable support devices, their custom dual-insulated units met strict patient safety isolation specs when other vendors failed."
Technical Program Manager, Orqis Medical
"Without Astrodyne TDI's engineering assistance during IEC 60601-1-2 EMC testing and system safety verification, we would have suffered severe schedule delays. Their level of technical support is unmatched in the power industry."
Lead Compliance Engineer, Cardio Dynamics
"The reliability of Astrodyne TDI power platforms in defense applications is proven. Their responsiveness and engineering rigour were crucial to maintaining mission-critical deployment readiness."
Program Manager, Tobyhanna Army Depot
Technical FAQ
Frequently Asked Questions by OEM Buyers
Key technical insights from our applications engineering department regarding standards, custom modifications, and thermal management.
Our power supplies and EMI filters are certified to major global safety standards, including UL/cUL 62368-1 (Information & Communication Technology), IEC/EN 60601-1 3rd & 4th Edition (Medical Electrical Equipment), SEMI F47 (Voltage Sag Immunity), and MIL-STD-461 / MIL-STD-810 for defense applications. CE and UKCA declarations are maintained across standard product families.
Every product specification provides detailed derating curves for operation above nominal ambient temperatures. We offer conduction-cooled, forced-air, and liquid-cooled platform options to match stringent system thermal envelopes. Engineering support is available to calculate thermal derating based on your actual enclosure airflow and duty cycle.
Yes. Over 60% of our production consists of modified standard or fully custom platforms. Modifications include custom output voltages, tailored wiring harnesses, conformal coating, custom enclosures, modified capacitance for specific leakage current limits, and pre-set digital control firmware.
You can contact our applications engineers directly to discuss your project requirements, request detailed 3D CAD models and datasheet specifications, or receive a quick technical quotation. Click the catalog button below to initiate immediate live chat support or technical request handling.
Need Technical Assistance or Product Specifications?
Connect directly with our senior application engineers for custom power design reviews, EMI pre-compliance consultation, and complete catalog documentation.