Chokes Cylindrical Coil Forms 1537 High current R.F. chokes on cylindrical coil forms with axial leads. • 1537 is ideally suited for filtering in Switch Mode Power Supplies. • Overall coil length, 1.25”. • Lead length, 1.5” long. • Shrink sleeve as outer cover for mechanical protection and electrical insulation. • Optimum frequency range, 10 KHZ to 2 MHz. • Other values are available upon request. MECHANICAL ELECTRICAL SPECIFICATION Part No. Inductance Tol. æ 5% Q Min. Test Freq. DCR Max. Rated Current Max. Outside Dia. (D) Inch Length (L) Inch Lead Dia. Gauge 10 µH 20 µH 30 µH 4.5 6.5 5.3 1 KHz 1 KHz 1 KHz 0.006 Ω 0.013 Ω 0.024 Ω 20.0 A 12.5 A 8.0 A 0.63 0.60 0.58 1.25 1.25 1.25 14 16 18 1537 H 1537 J 1537 K 40 µH 50 µH 75 µH 5.2 3.4 3.2 1 KHz 1 KHz 1 KHz 0.039 Ω 0.064 Ω 0.128 Ω 5.0 A 3.2 A 2.0 A 0.57 0.56 0.54 1.25 1.25 1.25 20 20 20 1537 L 1537 M 1537 N 100 µH 250 µH 500 µH 10.5 12.0 11.6 1 KHz 1 KHz 1 KHz 0.050 Ω 0.114 Ω 0.260 Ω 8.0 A 5.0 A 3.2 A 0.71 0.69 0.65 1.25 1.25 1.25 18 20 20 1537 P 1537 R 750 µH 1000 µH 10.0 7.4 1 KHz 1 KHz 0.465 Ω 0.830 Ω 2.0 A 1.2 A 0.61 0.59 1.25 1.25 20 20 ISSUE A 15367 91/02/25 1537 E 1537 F 1537 G An ISO 9001 Registered Company 229 Colonnade Road, Nepean, Ontario, Canada K2E 7K3 Tel: (613) 226-1626 Fax: (613) 226-7124 www.filtran.com