Solar 6220-1A Audio Isolation Transformer

EMC Item no.: 267
  • ISO 7637
  • DEF STAN 61-5
  • Automotive
Test Mode: Immunity
Test Type: Conducted
Manufacturer: Solar
Frequency: 30Hz-250kHz

There is a minimum 3-day hire period

Product description

The Solar 6220-1A audio isolation transformer was specifically designed for making conducted audio frequency susceptibility tests as required by MIL-STD-461/462 and other EMI specifications.

It can be used as a pickup device to measure low frequency EMI currents at lower levels than conventional current probes.

In addition, its secondary may be used as an isolating inductor in the power line during transient susceptibility tests.

The transformer is capable of handing up to 200 watts of audio power into its primary over the frequency range 30 Hz to 250 KHz. The turns ratio provides a two-to-one step down to the special secondary winding. The secondary will handle up to fifty amperes of a.c. or d.c. without saturating the transformer. Another secondary winding is connected to a pair of binding posts suitable for connecting to a.c. voltmeter as directed by the applicable EMI specifications. This winding serves to isolate the voltmeter from power ground. Neither the primary nor the secondary windings are connected to the end bells of the core. The transformer may be used as a 4-ohm primary and 1-ohm secondary or 2.4-ohm primary and 0.6-ohm secondary or 2-ohm primary and 0.5-ohm secondary.

General specification

Frequency range

20Hz to 250kHz

Secondary Rating

40A MAX (AC or DC)


<5 Ω


One-forth the primary impedance

Audio Power   

200 watts

Turns Ratio  

Two-to-one step down

Other accessories are available - please contact us