Toroids (5977003801) Part Number: 5977003801 77 TOROID Explanation of Part Numbers: Digits 1 & 2 = Product Class Digits 3 & 4 = Material Grade 9th digit 1 = Parylene Coating,2 = Thermo- Set Plastic Coating A ring configuration provides the ultimate utilization of the intrinsic ferrite material properties. Toroidal cores are used in a wide variety of applications such as power input filters, ground- fault interrupters, common- mode filters and in pulse and broadband transformers. All toroidal cores are supplied burnished to break sharp edges. Coating Options: Toroids with an outside diameter of 9.5 mm (0.375) or smaller can be supplied Parylene C coated. The Parylene coating will increase the A and C dimensions and decrease the B dimension a maximum of 0.038 mm (0.0015). The ninth digit of a Parylene coated toroid part number is a 1. See reference tables for the material characteristics of Parylene C. Parylene C coating is RoHS compliant. Toroids with an outside diameter of 9.5 mm (0.375) or larger can be supplied with a uniform coating of thermo- set plastic coating. This coating will increase the A and C dimensions and decrease the B dimension a maximum of 0.5 mm (0.020). The 9th digit of the thermo- set plastic coated toroid part number is a 2. Thermo- set plastic coating is RoHS compliant. Thermo- set plastic coated parts can withstand a minimum breakdown voltage of 1000 Vrms, uniformly applied across the C dimension of the toroid. For any toroidal core requirement not listed in the catalog, please contact our customer service department for availability and pricing. Catalog Drawing 3D Model The C dimension may be modified to suit specific applications. Weight: 106 (g) Dim mm mm tol nominal inch inch misc. A 61 1.30 2.402 B 35.55 0.85 1.4 C 12.7 0.50 0.5 Chart Legend l/ A : Core Constant, l : Effective Path Length, A : Effective Cross- Sectional Area, V : e e e Effective Core Volume A : Inductance Factor L Electrical Properties A (nH) 2950 25% L 2 Ae(cm ) 1.57 -1 l/ A(cm ) 9.1 l (cm) 14.4 e 3 V (cm ) 22.8 eToroids are tested for A values at 10 kHz. L Fair- Rite Products Corp. One Commercial Row, Wallkill, New York 12589-0288 888-324-7748 845-895-2055 Fax: 845-895-2629 emailprotected www.fair- rite.com