Hammond 1530B475 47uH Sub-Miniature RF Choke, 188 mA Iron Core

The 1530B475 is a sub-miniature R.F. choke from the Hammond 1530 Series, rated at 47 uH with an inductance tolerance of +/- 5%. It is a mid-range inductance coil for engineers and OEM designers who need a compact inductor for network, filter and delay line circuits, the applications the 1530 Series is intended for.

Performance is specified with L and Q values measured on a Q meter. This part is rated for a minimum Q of 44 at a test frequency of 2.5 MHz, with a minimum Fo of 9.1 MHz. Maximum DC resistance is 3.36 ohms and the maximum DC current is 188 mA, giving designers a clear current limit when sizing the choke for a supply or bias line.

Construction is a varnish-impregnated coil wound over an iron core. The 1530B475 has a form length of 0.25 in (6 mm) (tolerance +/- 0.03 in) and a maximum coil diameter rating of 0.175, keeping it within the series' subminiature size range of .25" to .63". Shipping weight is 0.1 lbs (0.05 kg).

Key ratings at a glance:

• Inductance: 47 uH, +/- 5%
• Q minimum: 44 at 2.5 MHz
• Fo minimum: 9.1 MHz
• DC resistance maximum: 3.36 ohms
• DC current maximum: 188 mA

The 1530B475 is listed as RoHS compliant and REACH compliant, and carries UPC 623980292182 and UNSPSC code 39121301. Hammond notes that the 1530 Series will soon be discontinued as a stocked series and is available while quantities last.