Power Supplies & EMI/EMC Filters Since 1959
Engineered Power for Mission-Critical Systems
Standard and custom AC/DC, DC/DC, EMI filtering and power distribution platforms — designed, tested and manufactured under one quality system.
60+Years in Power Design
ISO9001:2015 & 13485
100%Units Functionally Tested
GlobalEngineering & Manufacturing
Product Portfolio
Power Conversion, Filtering & Distribution Product Lines
Nine engineered product families cover the full path from the utility connection to the load. Every platform is supported by application engineers who review topology, thermal design, EMC margin and agency approvals before you commit to a design.
AC/DC Power Supplies
Regulated DC from universal AC input in open-frame, enclosed, encapsulated, board-mount, external adapter, rack-mount and ruggedized/HazLoc formats — from a few watts to multi-kilowatt.
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DC/DC Power Supplies
Isolated and non-isolated converters including rugged, conduction- and liquid-cooled series for electric mobility, battery-fed systems and harsh industrial environments.
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EMI/EMC Filters
Single-phase, IEC inlet, DC, three-phase Delta and WYE, feed-thru, Tempest and MIL-COTS filters that attenuate common- and differential-mode noise to pass CISPR, FCC and MIL-STD limits.
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Uninterruptible Power Supplies
Mobile medical and rack-mount UPS systems that hold critical loads through outages, transfers and transport — engineered for patient-environment and clinical up-time requirements.
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Electronic Loads
Programmable high-voltage dynamic loads for power supply validation, battery and fuel-cell testing, with fast transient response and configurable operating modes.
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Power Supplies by Coolant Type
Select convection, forced-air, conduction or liquid-cooled construction to match your thermal budget, acoustic limits and cleanroom particulate constraints.
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Power Transformers
Toroidal and medical-grade isolation transformers, current transformers and isolation stations for accurate voltage conversion, low leakage current and dependable galvanic isolation.
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Power Distribution Units
Single-phase, three-phase, rackmount and cabinet-style PDUs with metering, circuit protection and custom outlet configurations for labs, shelters and data facilities.
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Custom Power Solutions
When no catalog part fits, our engineers modify proven platforms or develop new designs — including firmware, potting, coatings, connectors and integrated power subsystems.
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Flagship Platform — LiquaBlade™
16.5 kW. 1U. Liquid-Cooled Power Redefined
Engineered for next-generation systems, LiquaBlade delivers exceptional power density in a compact 1U chassis. Advanced liquid cooling removes heat at the source, so the platform holds full output in sealed cabinets and particulate-sensitive environments where fans are unacceptable.
- Scalable parallel architecture for multi-kilowatt racks
- Digital programmability and system-level telemetry
- Built for semiconductor process tools, defense and heavy industrial loads
Medical System Design
Power That Passes 60601 the First Time
Medical programs fail late for predictable reasons: insufficient isolation class, leakage current above patient limits, or inadequate immunity margin under IEC 60601-1-2. We align power supply, EMI filter and isolation transformer selection with your risk file and test plan before pre-compliance, reducing costly redesign loops.
- 2×MOPP isolation and low patient-leakage architectures
- Medical-grade isolation transformers and mobile medical UPS
- Robotic surgery, navigation and diagnostic imaging experience
Semiconductor Capital Equipment
Conforming to SEMI F47 Voltage Sag Tolerance
Power supplies inside semiconductor manufacturing equipment are generally required to conform to the SEMI F47 voltage sag tolerance standard, which defines how long a unit must keep operating during a temporary degradation of its single-phase AC input. Ride-through behaviour directly protects wafer lots and tool availability.
- Verified sag ride-through on single-phase input platforms
- Electrostatic chuck and RF-adjacent power expertise
- Fab-friendly liquid cooling and low-particulate construction
Why OEMs Standardise on Astrodyne TDI
Six Decades of Applied Power Engineering
A specification sheet only tells part of the story. Real programs are won or lost on thermal derating in the real enclosure, EMC margin with your cable harness, and whether the supplier can hold form-fit-function for a decade of production. Those are the problems our engineers solve every day.
Astrodyne TDI supports customers from first concept sketch through qualification, agency submission and long-term production — with in-house design, magnetics, EMI pre-compliance capability and 100% functional testing on shipped product.
Design Authority
Topology, magnetics and control loops developed in-house, not re-badged.
Compliance Support
EMI pre-compliance guidance and documentation for agency submissions.
Quality Systems
ISO 9001:2015 and ISO 13485 processes with full traceability.
Lifecycle Continuity
Long-life platforms and change control that protect multi-year builds.
Industries We Power
Applications Engineered to Sector Standards
Requirements differ sharply by market: patient safety in healthcare, sag immunity in fabs, shock and EMI hardening in defense. Our platforms and documentation are shaped around those realities.
Healthcare
Reliable, low-leakage power and filtering for diagnostic, surgical and patient-connected devices.
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Semiconductor Fab
High-density, SEMI F47-conscious power for deposition, etch, metrology and e-chuck systems.
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Industrial
Automation, test and measurement, renewable energy and facility power with clean line behaviour.
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Military & Aerospace
COTS and ruggedized power plus Tempest and MIL-COTS filters for MIL-STD environments.
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Pro-Grade Appliances
Durable, cost-optimised EMI filtering and power modules for premium appliance platforms.
Engineering FAQ
Specification Questions Buyers Ask Us Most
Practical answers from our applications engineering team — written to help you shortlist correctly the first time.
Start with the load profile (continuous and peak watts), required output voltages and regulation, then confirm the safety and EMC framework: IEC/EN 60601-1 3rd Edition with 2×MOPP isolation where patient contact exists, IEC 60601-1-2 4th Edition immunity, and leakage-current limits. Next evaluate mechanical envelope, cooling method and expected service life. Our engineers review the complete system architecture — not just the wattage — before recommending a standard or modified platform.
A Delta filter suits three-wire three-phase systems with no distributed neutral. A WYE filter is built for four-wire systems carrying a neutral conductor, filtering line-to-neutral noise paths and using higher current-rated neutral components. Choosing the wrong topology commonly leaves common-mode noise unattenuated and causes conducted-emissions failures at the test house.
Liquid cooling removes heat far more efficiently than forced air. That enables much higher power density in a small footprint, eliminates fan noise and fan-related failure modes, and keeps particulate-sensitive environments such as semiconductor fabs and cleanrooms clean. It is the preferred approach whenever kilowatt-class power must fit into 1U or a sealed enclosure.
Both. Many programs begin as a modified standard platform — different output voltage, connectors, potting, coating, firmware or mechanical interface — which shortens qualification time and cost. Where a modification cannot meet the requirement, our teams develop ground-up custom power supplies, EMI filters, transformers and integrated power subsystems.
SEMI F47 defines the voltage-sag envelope that single-phase equipment must ride through without interrupting operation. A compliant supply keeps delivering regulated output during specified short-duration line sags, preventing tool aborts and scrapped wafers. Note that the standard applies to single-phase input equipment, not three-phase input supplies.
Depending on the family, products are supported by UL/cUL and IEC safety approvals, CE and UKCA marking, IEC 60601-1 medical safety, industrial and MIL-standard EMC performance data, and RoHS/REACH declarations. Manufacturing operates under ISO 9001:2015 and ISO 13485 quality systems, with certification documents and declarations available through our resources library.
Insights
Astrodyne TDI News & Engineering Blog
Design notes, compliance guidance and product announcements from the engineers who build our platforms.
From Grid to Load: Complete Power Architecture
Modern systems depend on more than one component. From the incoming utility connection to the equipment consuming power, every stage must work together to stay reliable and efficient.
Are Conducted Emissions Risking Your EMC Compliance?
A system can operate exactly as intended and still fail formal EMC testing. Understanding conducted-emission paths early prevents late-stage redesign and schedule loss.
3-Phase Power: Delta vs Wye Explained
Three-phase distribution shapes electrical system design, and three-phase EMI filters are critical in heavy-duty industrial equipment. Here is how the two topologies differ.
Have a Difficult Power Requirement?
Send us your specification and speak directly with an applications engineer — no call centre in between.