Product Overview
0.80uH 21.5A Bare Coil Choke 16 AWG High Current
Condition
Unused new old stock (NOS). Bare coil with factory-tinned through-hole leads, clean and unmounted. Sold each.
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Product Overview
Pulse Electronics PA0689 is a bare-coil through-hole toroidal power inductor engineered for high-current DC-DC conversion, output filtering, and power supply line conditioning. Built with heavy 16 AWG magnet wire wound across a blue-coated iron powder core, this choke provides low DC resistance and reliable energy storage in compact power stages.
Key Features
- 0.80 uH typical inductance at rated current
- 1.70 uH inductance at zero DC current (+/-20%)
- 21.5 A rated current handling (40-degree C rise)
- 2.0 mOhm maximum DC resistance (DCR)
- 7-turn single 16 AWG winding on T44-52 iron powder toroid
- Radial through-hole mounting with 90-degree formed, tinned leads
Applications
- Replaces failed output filter chokes on high-current switch-mode power supplies.
- Installs into custom bench power supplies, buck converters, and amateur radio linear amplifier filtering stages.
- Useful for makers winding custom magnetic chokes or building high-amperage battery charging rigs.
Frequently Asked Questions
What are the physical dimensions and lead spacing?
Outer winding diameter measures 15 mm on a 4 mm thick core, with radial through-hole leads formed at 90 degrees on 8 mm centers.
How can I confirm this is a PA0689 without markings on the core?
Bare-coil toroidal inductors typically lack printed ink. Physical construction matches the factory specification: 7 turns of 16 AWG enameled wire on a blue-coated T44-sized toroid with formed, tinned leads.
Seven tight turns of heavy copper on iron powder that ask for nothing more than a solid solder joint and a steady current to do their job.
