50943% TAN 47 (RON AT A WMirniature Low Silhouette Surtace Mounyy TOROIDAL INDUCTORS/TRANSFORMERS @ Fully encapsulated Surface Mount design @ Series or Parallel inductor configuration @ 1:1 transformer @ Low external magnetic field @ Stable powdered iron cores design notes Toroidal inductors described in this brochure are manufactured of the highest quality raw materials utilizing powdered iron core mate- rial; they are provided as square low silhouette units with surface mount leads to realize maximum inductance per unit volume. These toroidal! inductors are designed for use as single or dual inductors or as 1:1 transformers to provide the utmost in versatility for applications in computers, filters, instruments, missiles, aircraft, business machines, communications equipment and similar type applications. They are designed for printed circuit board surface mount applications; lead design provides positive standoff to allow flush cleaning of solder-fiux residue from under the component after the soldering operation. These inductors are offered in 11 values and four different sizes for maximum design flexibility. Phosphor-bronze or beryllium copper surface mount leads are attached and the entire unit is encapsu- lated in the housing with epoxy resin. Leads are tin-plated per MIL- 62 L engineered components company 7 P-81728, semi-bright. Housing material is Vectra, a liquid crystal polymer plastic meeting the requirements of MIL-M-24519C. Vectra can be used continuously at 254C (489F), has a melt point of 280C (538F), is inherently flame retardant and meets the flammability requirements of UL 94V-0. These toroidal inductors are designed to meet the applicable portions of Specification MiL-C-15305, Grade I, Class B. Tempera- ture coefficient of inductance is less than 400ppm/C over the operating temperature range of -55 to +125C. Inductors have a minimum inter-winding dielectric strength of 2200V. Standard inductance tolerance is 10%; however, units can be supplied to closer tolerances on special order. All measurements of inductance are obtained at 1kHz and imA rms. Standard inductance values are shown in the following tables. Since induc- tance varies with AC/DC current values, each end application should be evaluated to ensure proper specification of inductance value. To assist in selecting optimal inductance during prototyping and breadboarding, toroid inductor kits are available. Inductance is measured on HP 4262A and 4284A/42841A LCR Meters. Tabulated current ratings are those calculated to cause a 40C rise in case temperature. Marking consists of manufacturers logo (EC2), part number, terminal identification and date code of manufacture. All marking is applied by silkscreen process using blue epoxy paint in accordance with MIL-STD-130, to meet the permanency of identification required by MIL-STD-202, Method 215. Vectra is a registered trademark of Hoechst Celanese Corporation. 3580 Sacramento Drive, P.O. Box 8121, San Luis Obispo, CA 93403-8121 Phone: (805) 544-38001 > * 4 10@-5 a4 1 = . 4 - Rt (HOG) yen \O 2 3 010 Fe 2 3 20 3 TYP. > |<-.020TYP. 2 <p ft mm SERIES PARALLEL TRANSFORMER uD be o A W ao a za L . o 1/2C le SIZE A B Cc c 1 350 275 250 cod) | 2 450 275 .300 LLOQ 3 .500 275 .400 A=WIDTH ANDLENGTH B=HEIGHT C=LEAD SPACING 4 600 325 500 SERIES INDUCTOR CONFIGURATION PARALLEL INDUCTOR CONFIGURATION Idc for Ide for # Rated Ide for Idec for Ide for PART *L pcr | # Rated Idc for *L DCR G SIZE Ide 10% drop | 20% drop | 30% drop Ide 10% drop | 20% drop | 30% drop NUMBER (UH) /(Ohms)! (amps) | ink inL inc | @H) |Ohms)! Camps) | ink in L inL SMIT-10-1 1 | 10 | 021 | 087 0.74 1.24 1.74 25 | 0.05 1.75 1.48 2.48 3.48 SMIT-20-1 1 | 20 | 029 | 074 0.52 0.88 1.23 5 | 007 1.47 1.04 1.76 2.46 SMIT-30-1 1 | 30 | 036 | o66 0.43 0.72 1.01 7.5 | 0.09 1.33 0.86 1.44 2.02 SMIT-50-1 1 | 50 | o46 | o59 0.33 0.56 0.78 125 | 0.12 1.17 0.66 1.12 1.56 SMIT-70-1 1 | 70 | 054 | 054 0.28 0.47 0.66 175 | 0.14 1.07 0.56 0.94 1.32 SmiT-100-1 | 1 | 100 | 065 | 0.49 0.23 0.39 0.55 25 | 0.16 0.98 0.46 0.78 1.10 smit-200-1 | 1 | 200 | os2 | 0.41 0.17 0.28 0.39 50 | 0.23 0.83 0.34 0.56 0.78 SMit-300-1 | 1 | 300 | 1.79 | 030 0.13 0.23 0.32 75 | 0.45 0.59 0.26 0.46 0.64 Smit-500-1 | 1 | 500 | 231 | 026 0.10 0.18 0.25 125 | 0.58 0.52 0.20 0.36 0.50 SMIT-700-1 | 1 | 700 | 2.74 |] 0.24 0.09 0.15 0.21 175 | 0.68 0.48 0.18 0.30 0.42 SMIT-1000-1] 1 | 1000 | 5.12 | 0.18 0.07 0.12 0.17 250 | 1.28 0.35 0.14 0.24 0.34 SMIT-10-2 | 2 } 10 | 0.21 1.05 1.06 1.78 2.50 25 | 0.05 2.10 2.12 3.56 5.00 SMIT-20-2 | 2 | 20 | 030] 088 0.75 1.26 1.77 5 0.08 1.76 1.50 2.52 3.54 SMIT-30-2 | 2 | 30 | 0.37 | 0.80 0.61 1.03 1.44 7.5 | 0.09 1.59 1.22 20.6 2.88 smit-50-2 | 2 | 50 | 0.48 | 0.70 0.47 0.80 1.12 125 | 0.12 1.40 0.94 1.60 2.24 SMit-70-2 | 2 | 70 | 056 | 0.64 0.40 0.67 0.95 175 | 0.14 1.28 0.80 1.34 1.90 SMIT-100-2 | 2 | 100 | 067 | 059 0.34 0.56 0.79 25 | 0.17 1.18 0.68 1.12 1.58 SMIT-200-2 | 2 | 200 | 0.95 | 0.50 0.24 0.40 0.56 50 | 0.24 0.99 0.48 0.80 1.42 SmiT-300-2 | 2 | 300 | 1.17 | 0.45 0.19 0.33 0.46 75 | 0.29 0.89 0.38 0.66 0.92 SMit-500-2 | 2 [| 500 | 1.51 | 0.39 0.15 0.25 0.35 125 | 0.38 0.79 0.30 0.50 0.70 SMIT-700-2 | 2 | 700 | 1.78 | 0.36 0.13 0.21 0.30 175 | 0.45 0.72 0.26 0.42 0.60 SMIT-100-2 | 2 | 1000 | 2.13 | 0.33 0.11 0.18 0.25 250 | 0.53 0.66 0.22 0.36 0.50 Smit-10-3 | 3 | 10 | o10 | 1.78 1.23 2.06 2.90 25 | 0.02 3.56 2.46 4.12 5.80 smit-20-3 | 3 | 20 | 014 | 1.50 0.87 1.46 2.05 5 | 0.04 3.00 1.74 2.92 4.10 smit-30-3 | 3 | 30 | 017 | 1.36 0.71 1.19 1.67 7.5 | 0.04 272 1.42 2.38 3.34 smit-50-3 | 3 | 50 | 022 | 1.19 0.55 0.92 1.30 12.5 | 0.06 2.38 1.10 1.84 2.60 smit-70-3 | 3 | 70 | o26 | 1.10 0.46 0.78 1.09 175 | 0.07 2.20 0.92 1.56 2.18 SMIT-100-3 | 3 | 100 | 0.31 1.00 0.39 0.65 0.92 25 | 0.08 2.00 0.78 1.30 1.84 SMIT-200-3 | 3 | 200 | 044 | 0.85 0.27 0.46 0.65 50 | 0.11 1.70 0.54 0.92 1.30 SMIT-300-3 | 3 | 300 | 0.86 | 0.60 0.22 0.38 0.53 75 | 0.22 1.20 0.44 0.76 1.06 SMIT-500-3 | 3 | 500 | 1.11 | 0.53 0.17 0.29 0.41 125 | 0.28 1.06 0.34 0.58 0.82 smit-700-3 | 3 | 700 | 2.05 | 0.39 0.15 0.25 0.35 175 | 051 0.78 0.30 0.50 0.70 SMIT-1000-3] 3 | 1000 | 2.45 | 0.36 0.12 0.21 0.29 250 | 0.61 0.72 0.24 0.42 0.58 SMiT-10-4 | 4 | 10 | 0.07 | 257 1.62 2.73 3.83 25 | 0.02 5.14 3.24 5.46 7.66 SmiT-20-4 | 4 | 20 | 0.09 | 2.17 1.15 1.93 2.71 5 0.02 4.34 2.30 3.86 5.42 SMiT-30-4 | 4 [| 30 | 0.71 1.96 0.94 1.57 2.21 7.5 | 0.03 3.92 1.88 3.14 4.42 smit-50-4 | 4 | 50 | 015 | 1.72 0.73 1.22 171 12.5 | 0.04 3.44 1.46 2.44 3.42 smit-70-4 | 4 | 70 | 017 | 1.58 0.61 1.03 1.45 17.5 | 0.04 3.16 1.22 2.06 2.90 SMIT-100-4 | 4 | 100 | 0.21 1.44 0.51 0.86 1.24 25 | 0.05 2.88 1.02 1.72 2.42 SMIT-200-4 | 4 | 200 | 0.29 | 1.21 0.36 0.61 0.86 50 | 0.07 2.42 0.72 1.22 1.72 Smit-300-4 | 4 | 300 | 057 | 0.7 0.30 0.50 0.70 75 | 0.14 1.74 0.60 1.00 1.40 SmIT-500-4 | 4 | 500 | 0.74 | 0.76 0.23 0.39 0.54 125 | 0.19 1.52 0.46 0.78 1.08 SMIT-700-4 | 4 | 700 | 1.39 | 0.56 0.19 0.33 0.46 175 | 0.35 112 0.38 0.66 0.92 SMIT-1000-4] 4 [1000 | 1.66 | 0.51 0.16 0.27 0.38 250 | 0.42 1.02 0.32 0.54 0.76 * Nominal L for # Ide # Rated for a 40C temperature rise Catalog No. C/120193 >