Hammond 1538M22 10uH 20A EMI/RFI Choke, Ferrite Rod Core

The 1538M22 is an EMI/RFI choke from the 1538 series, described by the manufacturer as a heavy duty RF hash choke. It is rated 10 uH +/- 10% with a maximum DC current of 20 A, making it a practical choice for electronics designers and OEM engineers building filtering circuits or energy storage inductors.

The 1538M22 is the highest-current 10 uH choke in the 1538 series at 20 A, and its part drawing adds lead and reference dimensions plus label details not shown on the series table. Other 10 uH values on the 1538 specification sheet are 1538M02 (9 A), 1538M09 (12 A) and 1538M16 (16 A), so compare current rating and body size when choosing.

The choke is built on a high saturation flux density ferrite rod. It has 1 in long leads, tinned to within 1/8 in of the body. The 1538 series is specified for an ambient temperature range of -60 C to +85 C.

• Inductance: 10 uH +/- 10%
• Self-resonant frequency: 20 MHz
• Maximum DC resistance: 0.006 ohms
• Maximum DC current: 20 A
• Maximum Dim. A: 1.69 in (43 mm); maximum Dim. B: 0.72 in (18 mm)
• Typical Dim. C: 1.50 in (38 mm); typical Dim. D: 0.08 in (2 mm)

Inductance for the 1538 series is measured at 1 kHz with 0 A DC current, and typical inductance change is less than 5% at twice rated current. The 1538M22 is RoHS and REACH compliant and has a shipping weight of 0.1 lbs (0.05 kg). Its part drawing shows a 1.690 in maximum Dim. A, a 0.720 in maximum Dim. B, E and F dimensions of 1.000 in +/- 0.063, and a label marked MADE IN CANADA; the drawing lists the resonant frequency as 20 MHz minimum.