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Magnetics Design & Testing Capabilities

If you are looking for efficiency, size, accuracy, or any other parameters, API will analyze the circuit and work with your design team to find the optimum magnetics solution to improve equipment performance:

  • Save space
  • Optimize efficiency by increasing the space
  • Produce an EMI inductor that fits a specific profile
  • Fix a failure mode with another magnetics component

  Voltage Current IND Turns Turns Ratio DCR Volt-Amp Rating Accuracy (%) Hi-Pot Rating Other
Current Transformers X X   X X X   X   Burden Resistor
Power Inductor/Choke X X   X   X   X X  
Switch Mode Power Supply Inductor X X X X   X   X X  
Switch Mode Power Supply Transformer X X     X X X   X  
Toroidal Power Transformer X X     X X X X X  
Laminate Power Transformer X X     X X X X X  
Broadband (RF) Transformer                   IL, Coupling, Frequency
Air Coil     X X   X        
Bandpass Filter X   X         X X  
Audio Transformer         X X X X   Impedance, CMR, THD
Voltage Sense Transformer X       X X X X X  
Lighting Chokes X X X              
Heater Coil           X   X   Heater Specifics
Relay Coil X         X     X  
RF Coupler                   IL, Coupling, Frequency
Fielded Directed Coil     X           X Input Pulse
Flyback Transformers X X     X X     X  
  Core Size Core Shape Core Material Wire Size Bobbin Size Temp Class Lead-Free (RoHS)
Current Transformers X X X X   X X
Power Inductor/Choke X X X X X X X
Switch Mode Power Supply Inductor X X X X X X X
Switch Mode Power Supply Transformer X X X X X X X
Toroidal Power Transformer X   X X   X X
Laminate Power Transformer X X X X X X X
Broadband (RF) Transformer X X X X     X
Air Coil       X     X
Bandpass Filter X X X X X X X
Audio Transformer X X X X X   X
Voltage Sense Transformer X X X X X X X
Lighting Chokes X X X X   X X
Heater Coil             X
Relay Coil X X X X X   X
RF Coupler X X X X     X
Fielded Directed Coil X X X X     X
Flyback Transformers X X X X X X X
Test Aspect Units Min Max Notes
Inductance (both w/ and w/o bias, up to 50A) mH     Up to 3 MHz
Leakage Inductance mH     Up to 3 MHz
DCR (DC Resistance) Ohms 1m 10M  
ACR (AC Resistance)       Up to 3 MHz
Turns Ratio   1 10000 Up to 3 MHz
Capacitance (inter-winding) pF     Up to 3 MHz
Polarity        
Hi-Pot/DWV (Dielectric Withstanding Voltage) kV   30  
Insertion Loss dB 0 100 Up to 1500 MHz
Coping Value dB 0 100 Up to 1500 MHz
Returns Loss dB 0 100 Up to 1500 MHz
Q     80 Up to 200 MHz
Impedance       Up to 3 MHz
Phase       Up to 3 MHz
Resonance       Up to 3 MHz
Longitudinal Balance        
Flyback Transformers        
Full Load Testing       Build to suit
Filter Shape Factor and Frequency Response        
Hi-Rel, Burn-in, and Various Environmental Testing/Qualification        
  Units Min Max Notes
Wire Size X 40 8 Have used larger size copper tubing on some air coils and high power field-focused coils.