Sidactor Protection Thyristor Products Page 62 SIDACtor Protection Thyristor Products

SIDACtor Protection Thyristors 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/17 Table 3.50 Minimum clearances in secondary circuits (mm) Note: The values in parentheses apply to BASIC INSULATION, SUPPLEMENTARY INSULATION or REINFORCED INSULATION if manufacturing is subjected to a quality control program. Note: F = Functional B = Basic S = Supplementary R = Reinforced D = Double PEAK WORKING VOLTAGE X CLEARANCES in mm Highest transient overvoltage in the SECONDARY CIRCUIT (V peak) X 71V 71V < X 800V X 800V 800V < X 1500V 1500V < X 2500V Pollution Degree 1 and 2 3 1 and 2 3 1, 2 and 3 V F B/S R F B/S R F B/S R F B/S R F B/S R F B/S R 71 0.2 0.4 0.8 0.2 0.7 1.4 0.8 1.3 2.6 0.5 1.0 2.0 0.8 1.3 2.6 1.5 2.0 4.0 -0.2 (0.4) (0.2) (0.4) (0.8) (1.6) (0.5) (1.0) (0.8) (1.6) (1.5) (3.0) 140 0.2 0.7 1.4 0.2 0.7 1.4 0.8 1.3 2.6 0.5 1.0 2.0 0.8 1.3 2.6 1.5 2.0 4.0 (0.2) (0.4) (0.8) (1.6) (0.5) (1.0) (0.8) (1.6) (1.5) (3.0) 210 0.2 0.7 1.4 0.2 0.9 1.8 0.8 1.3 2.6 0.5 1.0 2.0 0.8 1.3 2.6 1.5 2.0 4.0 (0.2) (0.4) (0.8) (1.6) (0.5) (1.0) (0.8) (1.6) (1.5) (3.0) 280 0.2 1.1 2.2 F 0.8B/S 1.4 (0.8) R 2.8(1.6) 1.5 2.0 4.0 (0.2) (0.4) (1.5) (3.0) 420 0.2 1.4 2.8 F 1.0 B/S 1.9 (1.0) R 3.8(2.0) 1.5 2.0 4.0 (0.2) (0.4) (1.5) (3.0) Table 3.51 Minimum creepage distances (mm) The Material Groups are defined as: Material Group I CTI 600 Material Group II 600 > CTI 400 Material Group IIIa 400 > CTI 175 Material Group IIIb 175 > CTI 100 CREEPAGE DISTANCES in mm RMS WORKING VOLTAGE X Pollution degree 1 2 1 2 3 Material group Printed boards Other materials I, II, IIIa, IIIb I, II, IIIa I, II, IIIa, IIIb I II IIIa, IIIb I II IIIa, IIIb 10 0.025 0.04 0.08 0.4 1.0 12.5 0.025 0.04 0.09 0.42 1.05 16 0.025 0.04 0.1 0.45 1.1 20 0.025 0.04 0.11 0.48 1.2 25 0.025 0.04 0.125 0.5 1.25 32 0.025 0.04 0.14 0.53 1.3 40 0.025 0.04 0.16 0.56 0.8 1.1 1.4 1.6 1.8 50 0.025 0.04 0.18 0.6 0.85 1.2 1.5 1.7 1.9 63 0.04 0.06 0.2 0.63 0.9 1.25 1.6 1.8 2.0 80 0.063 0.10 0.22 0.67 0.9 1.3 1.7 1.9 2.1 100 0.1 0.16 0.25 0.71 1.0 1.4 1.8 2.0 2.2 125 0.16 0.25 0.28 0.75 1.05 1.5 1.9 2.1 2.4 160 0.25 0.40 0.32 0.8 1.1 1.6 2.0 2.2 2.5 200 0.4 0.63 0.42 1.0 1.4 2.0 2.5 2.8 3.2 250 0.56 1.0 0.56 1.25 1.8 2.5 3.2 3.6 4.0 320 0.7 1.6 0.75 1.6 2.2 3.2 4.0 4.5 5.0 400 1.0 2.0 1.0 2.0 2.8 4.0 5.0 5.6 6.3 500 1.3 2.5 1.3 2.5 3.6 5.0 6.3 7.1 8.0 630 1.8 3.2 1.8 3.2 4.5 6.3 8.0 9.0 10 800 2.4 4.0 2.4 4.0 5.6 8.0 10 11 12.5 If the Material Group is not known, then Material Group IIIb shall be assumed. Regulatory Requirements (continued)

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