High-Performance Magnetics & Isolation Platforms
Power Transformers
Custom & standard toroidal isolation, 3-phase, low-inrush, and medical-grade power transformers engineered for ultra-low leakage, thermal stability, and maximum efficiency.
Engineering Excellence
Powerful, Compact & Versatile Electrical Transformers
Astrodyne TDI brings over 60 years of custom power engineering expertise to every magnetic component. Our power transformers provide reliable voltage transformation, robust galvanic isolation, and strict compliance with global safety standards.
Designed for mission-critical medical systems, industrial automation equipment, cleanroom fab tools, and harsh aerospace environments, our transformers minimize stray magnetic field interference while holding ultra-low leakage current thresholds.
Core Technical Capabilities
- Single-Phase (10 VA to 15 kVA) & 3-Phase (30 VA to 45 kVA)
- Toroidal core designs with up to 90% reduced stray magnetic fields
- Class A, B, F, and H high-temperature insulation systems
- Built-in low-inrush current mitigation to prevent breaker trips
- Low earth & enclosure leakage current (< 100 µA for medical)
- cULus recognized, UL listed, ANSI/AAMI ES60601-1, and CE marked
Comprehensive Portfolio
Precision Engineered Transformer Categories
Explore our extensive range of standard platforms and modified magnetic solutions built to withstand high continuous electrical and thermal stress.
Isolation Transformers
Lightweight toroidal isolation designs offering high operational efficiency, low stray field noise, and compact mechanical mounting for sensitive electronics.
Medical Grade Transformers
Engineered to deliver clean isolation with 2×MOPP protection, minimal leakage current, and thermal safety switches for patient-connected devices and surgical suites.
Current Transformers
Highly accurate sensing transformers designed for reliable current monitoring, power metering, motor controls, and equipment fault-protection circuits.
3-Phase Transformers
Heavy-duty 30VA to 45kVA line voltage transformation units designed to adapt Delta and WYE electrical configurations for industrial machinery and motor loads.
Low Inrush Current Transformers
Specialized magnetic core topology limits start-up magnetizing current spikes, preventing upstream breaker trips without external soft-start circuits.
High Voltage Transformers
Ruggedized, encapsulated high-voltage toroidal designs offering high dielectric isolation and robust performance in extreme thermal and industrial conditions.
Auto Transformers
Economical and compact single-winding voltage step-up or step-down solutions for applications where electrical isolation is not mandated.
Low Profile Transformers
Designed specifically for tight 1U/2U rackmount enclosures, slim control boxes, and height-restricted OEM medical equipment chassis.
Intermittent Duty Transformers
Optimized for peak power output during short cycle times, allowing engineers to size down transformer volume and weight for pulsed operational profiles.
Industry Applications
Targeted Application Engineering
Different sectors demand specific isolation standards, mechanical packaging, and electromagnetic compatibility. Astrodyne TDI designs transformers to meet these exact field demands.
Healthcare & Life Sciences
Medical Grade Isolation & Patient Safety
Medical electronic equipment demands maximum isolation and minimal leakage to ensure patient and operator protection. Our transformers are engineered to pass strict 3rd Edition 60601-1 audits on the first testing cycle.
- Diagnostic imaging (MRI, CT, Ultrasound) and surgical robotics
- Patient monitoring devices, dialysis units, and medical carts
- Certified 2×MOPP isolation with optional Faraday shielding
Industrial & Energy Systems
Rugged Industrial & Automation Duty
Industrial machinery, motor drives, process automation tools, and renewable power conversion platforms require thermal durability and transient suppression under continuous load.
- Semiconductor capital equipment & e-chuck power systems
- Motor drives, CNC controllers, and solar/wind power inverters
- Custom mounting plates, potted assemblies, and high-temp Class H wire
Quality & Compliance
World-Class Quality Standards & Certifications
Every transformer manufactured by Astrodyne TDI undergoes 100% functional, safety, and high-pot testing under rigid ISO quality systems.
ISO 9001:2015
General Quality Management System certification governing engineering, supply chain, and global manufacturing operations.
ISO 13485:2016
Medical Device Quality Standard ensuring complete lot traceability, risk management, and medical compliance.
AS9100D
Aerospace Quality Management Standard for high-reliability military, aviation, and defense power systems.
Engineering FAQ
Frequently Asked Questions on Power Transformers
Key technical insights from our applications engineering team to help you specify the right transformer architecture.
Toroidal transformers utilize a continuous ring core without air gaps, resulting in significantly lower magnetic leakage, up to 90% less acoustic hum, and higher power efficiency. Additionally, toroidal designs offer up to 50% reduction in weight and volume, making them ideal for compact enclosures and low-profile systems.
Medical-grade isolation transformers must comply with IEC/EN/UL 60601-1 standards. They require 2×MOPP (Means of Patient Protection), double isolation barriers, integrated thermal fuses, and extremely low earth and enclosure leakage currents (< 100 µA under normal conditions) to protect patients and equipment operators from electrical shock.
We offer insulation systems rated Class A (105°C), Class B (130°C), Class F (155°C), and Class H (180°C). Selecting higher insulation classes allows transformers to operate reliably under elevated ambient temperatures without compromising dielectric strength or service life.
Toroidal transformers inherently draw high initial magnetizing inrush current when energized. Our engineered low-inrush transformer designs alter magnetic flux density and core geometry to limit this turn-on surge current, preventing nuisance trips of standard fast-acting or medium-delay circuit breakers without needing external soft-start circuits.
Yes. In addition to standard catalog configurations, our engineering team regularly designs custom primary and secondary voltage taps, specialized wire termination, embedded thermal sensors, custom shielding, and potted or bracketed mounting hardware tailored to your specific mechanical envelope.
Need a Custom Power Transformer or Technical Guidance?
Speak directly with an application engineer to review your voltage, thermal, and regulatory specs.