HIGH ENERGY SPARK GAP DEVICES TG Legacy Series DESCRIPTION CP Clare’s TG Legacy Series of two electrode sparkgaps excel in applications that require the efficient transfer of high voltage, high energy pulses and DC overvoltage protection for magnetrons, diodes, capacitors, etc. The TG Legacy Series also includes three electrode triggered sparkgaps (cold cathode thyratrons) for switching high levels of stored energy in fractions of a microsecond, on command, using low energy control pulses. APPLICATIONS FEATURES ■ Tight DC breakdown voltage tolerance (± 10%) ■ Long-life tungsten or molybdenum electrodes ■ Rugged ceramic-to-metal or glass-to-metal ■ ■ ■ ■ construction Test equipment Video displays Pulse generators Medical electronics VOLTAGE RANGES Series DC Breakdown Units Voltage TG Two 0.345 - 60.0 kV 1.0 - 27.5 kV Electrode TG Three Electrode (See detailed specifications for more data. Contact CP Clare for TG and XG part numbers or for other requirements not listed.) North America: 1-800-CPCLARE 564 Europe: 32-11-300868 Asia: 886-2-2523-6368 Japan: 81-3-3980-2212 HIGH ENERGY SPARK GAP DEVICES Two Electrode High-Energy Spark Gaps SPECIFICATIONS All characteristics at 25˚C. PART NUMBER DC BREAKDOWN VOLTAGE (KV ± 10%) INITIAL REPETITIVE PULSE PULSE BREAKDOWN BREAKDOWN VOLTAGE (KV)(3) VOLTAGE (KV)(3) PACKAGE OUTLINE DIMENSION A (INCHES) DIMENSION B (INCHES) DIMENSION C (INCHES) TG-6 TG-8(1) TG-9 TG-14 TG-15 TG-16(1) TG-17 TG-19(2) TG-20A TG-22 2.50 2.50 3.00 12.50 3.00 3.00 2.60 2.20 ± 0.20 21.00 1.00 — — — 19.0 - 28.0 — — — — 17.0 - 24.0 — — — — 17.0 - 21.0 — — — — — — 1 1 1 2 1 1 1 1 7 1 0.620 max 0.620 max 0.620 max — 0.620 max 0.620 max 0.620 max 0.620 max 2.250 ± 0.125 0.620 max 0.455 ± 0.031 1.000 ± 0.031 0.460 ± 0.031 — 1.000 ± 0.031 1.000 ± 0.031 0.455 ± 0.031 0.455 ± 0.031 — 0.435 ± .031 0.188 max 0.125 max 0.188 max — 0.125 max 0.125 max 0.188 max 0.275 ± .07 — 0.188 max TG-24 TG-25 TG-26A TG-27A TG-28A TG-29 TG-30 TG-31 TG-32 TG-33 15.50 0.40 0.75 1.00 1.25 1.50 2.00 2.50 3.00 4.00 35.5 max — — — — — — — — — — — — — — — — — — — 2 1 2 2 2 2 2 2 2 2 — 0.600 ± .030 — — — — — — — — — 1.100 ± .031 — — — — — — — — — 0.250 max — — — — — — — — TG-34 5.00 — — 2 — — — TG-35 TG-36 TG-37 TG-38 TG-39 TG-40 TG-41A TG-42A TG-43A 6.00 8.00 10.00 12.50 15.00 17.50 0.75 1.00 1.25 — — — — — — — — — — — — — — — — — — 2 2 2 2 2 2 3 3 3 — — — — — — — — — — — — — — — — — — — — — — — — — — — TG-44 TG-45 TG-46 TG-47 TG-48 TG-49 TG-50 TG-51 TG-52 TG-53 TG-54 1.50 2.00 2.50 3.00 4.00 5.00 6.00 8.00 10.00 12.50 15.00 — — — — — — — — — — — — — — — — — — — — — — 3 3 3 3 3 3 3 3 3 3 3 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — TG-55 TG-56 TG-57 TG-58 TG-59 TG-60 17.50 20.00 25.00 30.00 40.00 50.00 — — — — — — — — — — — — 3 4 4 4 4 4 — 3.750 ± .125 3.750 ± .125 4.000 ± .188 4.250 ± .188 4.500 ± .188 — — — — — — — — — — — — (1) (2) (3) 6-32 tapped hole in non-tubulated end. Identical tubulation on both ends. The voltage level at which the spark discharge occurs when a unipolarity pulse train is applied to the gap. Typically, the pulse repetition rate is 400 pps (pulses/second) with a rise time of 0.3 µs and a pulse width of 0.5 µs. The “initial” range specifies at what increasing voltage the gap begins to fire and the “rep” range specifies at what decreasing voltage the gap ceases to fire repetitively. www.cpclare.com 565 HIGH ENERGY SPARK GAP DEVICES Two Electrode High-Energy Spark Gaps SPECIFICATIONS All characteristics at 25˚C. PART NUMBER DC BREAKDOWN VOLTAGE (KV ± 10%) INITIAL PULSE BREAKDOWN VOLTAGE (KV)(3) REPETITIVE PULSE BREAKDOWN VOLTAGE (KV)(3) PACKAGE OUTLINE DIMENSION A (INCHES) DIMENSION B (INCHES) DIMENSION C (INCHES) TG-61 TG-62 TG-63 TG-64 TG-65 TG-66 TG-67 TG-68 TG-69 TG-70 0.75 1.00 1.25 1.50 2.00 2.50 3.00 4.00 5.00 6.00 — — — — — — — — — — — — — — — — — — — — 5 5 5 5 5 5 5 5 5 5 0.770 ± .062 0.770 ± .062 0.770 ± .062 0.770 ± .062 0.770 ± .062 0.790 ± .062 0.790 ± .062 0.820 ± .062 0.820 ± .062 0.820 ± .062 0.310 ± .020 0.310 ± .020 0.310 ± .020 0.310 ± .020 0.310 ± .020 0.310 ± .020 0.310 ± .020 0.340 ± .020 0.340 ± .020 0.340 ± .020 0.520 ± .022 0.520 ± .022 0.520 ± .022 0.520 ± .022 0.520 ± .022 0.540 ± .022 0.540 ± .022 0.570 ± .022 0.570 ± .022 0.570 ± .022 TG-71 TG-72 TG-73 TG-74 TG-75 TG-76 TG-77 TG-78 TG-79 TG-82 8.00 10.00 12.50 15.00 17.50 0.40 ± .05 1.00 2.50 15.00 — — — — — — 9.0 - 11.5 — — 15.0 - 19.0 — — — — — — 9.0 - 11.5 — — 13.0 - 18.0 5 5 5 5 5 1 special 1A 2 7A 0.860 ± .062 0.860 ± .062 0.965 ± .062 0.965 ± .062 0.965 ± .062 0.600 ± .030 — 0.620 max — 0.950 ± .050 0.380 ± .020 0.380 ± .020 0.490 ± .020 0.490 ± .020 0.490 ± .020 0.494 ± .031 — 0.425 ± .031 — — 0.610 ± .022 0.610 ± .022 0.715 ± .022 0.715 ± .022 0.715 ± .022 0.250 max — — — — TG-83 TG-84 TG-85 TG-86 TG-87 TG-89 (2) TG-90 TG-98 TG-99 TG-100 16.50 30.00 15.00 0.60 0.80 2.90 20.00 0.345 ± .045 2.75 ± 0.25 38.00 16.0 - 22.0(4) 31.0 - 43.0(4) 9.0 - 11.5 — — — 17.0 - 24.0 — — — 16.0 - 22.0(4) 31.0 - 43.0(4) 9.0 - 11.5 — — — — — — — 2 4 special 1A 1A 1 special 3A 2 4 — 4.000 ± .188 — 0.620 max 0.620 max 0.620 max — — — 4.000 ± .188 — — — 0.537 ± .031 0.537 ± .031 0.460 ± .031 — — — 0.440 ± .031 — — — — — 0.188 max — — — 0.188 max TG-102 TG-103 TG-104 TG-105 TG-106 TG-107 TG-108 TG-109 TG-110 TG-112 1.25 1.50 2.00 2.50 3.00 3.50 4.00 5.00 0.40 ± .05 0.20 ± .10 — — — — — — — — — — — — — — — — — — — — 1A 1A 1A 1A 1A 1A 1A 1A 1A 1 0.620 max 0.620 max 0.620 max 0.620 max 0.620 max 0.620 max 0.620 max 0.620 max 0.620 max 0.620 max 0.440 ± .031 0.445 ± .031 0.445 ± .031 0.445 ± .031 0.487 ± .031 0.487 ± .031 0.487 ± .031 0.487 ± .031 — 0.455 ± .031 0.188 max 0.188 max 0.188 max 0.188 max 0.188 max 0.188 max 0.188 max 0.188 max — 0.275 ± .075 13.00 ± 1.00 25.00 21.00 21.50 45.00 8.00 — — 17.0 - 24.0 16.0 - 22.0 — 7.4 - 8.7 — — — — — — 3 4A 7 5 4 5 — 3.750 ± .125 2.000 ± .125 0.965 ± .062 4.250 ± .188 0.860 ± .062 — — — 0.490 ± .020 — 0.380 ± .020 — — — 0.715 ± .022 — 0.610 ± .022 TG-115 TG-116 (6) TG-117 TG-118 TG-119 TG-120 (1) 6-32 tapped hole in non-tubulated end. Identical tubulation on both ends. (3) The voltage level at which the spark discharge occurs when a unipolarity pulse train is applied to the gap. Typically, the pulse repetition rate is 400 pps (pulses/second) with a rise time of 0.3 µs and a pulse width of 0.5 µs. The “initial” range specifies at what increasing voltage the gap begins to fire and the “rep” range specifies at what decreasing voltage the gap ceases to fire repetitively. (4) Pulse repetition rate is 1500pps instead of the standard 400pps. (5) Though outlines 2, 3, and 3A are identical, the electrode materials and configurations vary internally. (6) Though outlines 4 and 4A are identical, gaps with outline 4A have heavier internal construction to withstand more severe shock and vibration. (2) North America: 1-800-CPCLARE 566 Europe: 32-11-300868 Asia: 886-2-2523-6368 Japan: 81-3-3980-2212 HIGH ENERGY SPARK GAP DEVICES Two Electrode High-Energy Spark Gaps SPECIFICATIONS All characteristics at 25˚C. PART NUMBER DC BREAKDOWN VOLTAGE (KV ± 10%) INITIAL REPETITIVE PULSE PULSE BREAKDOWN BREAKDOWN VOLTAGE (KV)(3) VOLTAGE (KV)(3) PACKAGE OUTLINE DIMENSION A (INCHES) DIMENSION B (INCHES) DIMENSION C (INCHES) TG-131 TG-132 TG-133 TG-135 TG-139 TG-140 TG-148 TG-149 TG-152 TG-153 30.00 2.00 9.00 2.00 0.50 0.60 6.00 2.00 0.50 0.38 ± .02 33.0 — 9.0 - 11.5 — — — 7.5 — — — 25.0 — 9.0 - 11.5 — — — 6.0 — — — 4A special 7A special 1A 3A special 9 special 1A 4.000 ± .188 — 0.192 ± .010 — 0.487 ± .031 — — 0.620 max — 0.487 ± .031 — — — — — — — 0.219 max — — — — — — — — — — — — TG-155 TG-156 TG-157 TG-162 TG-163 TG-164 TG-166 TG-167 TG-168 TG-169 1.40 2.625 ± 0.125 1.20 21.00 ± 1.00 31.50 ± 3.00 2.20 0.40 0.60 0.80 1.00 — — — — — — — — — — — — — — — — — — — — 2 1 9 4 4 9 9 9 9 9 — 0.620 max 0.515 max 3.750 ± .125 4.000 ± .188 0.620 max 0.515 max 0.515 max 0.515 max 0.515 max — 1.000 ± .031 0.125 max — — 0.219nom 0.125 max 0.125 max 0.125 max 0.125 max — 0.188 max — TG-170 TG-171 TG-172 TG-173 TG-174 TG-175 TG-176 TG-183 TG-184(5) TG-186 2.50 3.00 3.50 4.00 5.00 6.00 6.00 35.00 7.00 20.00 — — — — — 6.0 - 7.5 — — — — — — — — — 6.0 - 7.5 — — — — 9 9 9 9 9 9 7 4 3A 4 0.620 max 0.620 max 0.620 max 0.620 max 0.620 max 0.620 max 2.250 ± 0.125 4.000 ± .188 — 3.750 ± .125 0.219 max 0.219 max 0.219 max 0.219 max 0.219 max 0.219 max — — — — — — — — — — — — — — TG-187 TG-188 TG-189 TG-191(2) TG-192 TG-193 TG-194 TG-196 TG-197 TG-198(1) TG-249 1.50 0.60 0.50 0.45 31.00 ± 3.0 2.30 60.00 ± 8.0 9.00 18.375 ± 0.875 1.60 0.18 ± .05 — — — — — — — 9.0 - 11.5 — — — — — — — — — — 9.0 - 11.5 — — — 3 1 9 1 4 special 4 7A 2 1 1A — 0.620 max 0.515 max 0.620 max 4.000 ± .188 — 4.500 ± .188 0.500 ± 0.30 — 0.620 max 0.450 ± .031 — 1.000 ± .031 max 0.125 nom 0.455 ± 0.031 — — — — — 1.000 ± 0.031 — — 0.188 max — 0.275 ± 0.075 — — — — — 0.125 max — TG-359 TG-366A TG-373 TG-375 TG-376 0.345 ± 0.45 14.00 21.00 20.5 - 24.0 14.8 - 18.15 — — — — — — — — — — special special special 4 4 — — — 4.000 ± .188 4.000 ± .188 — — — — — — — — — — — — — — — (1) 6-32 tapped hole in non-tubulated end. Identical tubulation on both ends. The voltage level at which the spark discharge occurs when a unipolarity pulse train is applied to the gap. Typically, the pulse repetition rate is 400 pps (pulses/second) with a rise time of 0.3 µs and a pulse width of 0.5 µs. The “initial” range specifies at what increasing voltage the gap begins to fire and the “rep” range specifies at what decreasing voltage the gap ceases to fire repetitively. (4) Pulse repetition rate is 1500pps instead of the standard 400pps. (5) Though outlines 2, 3, and 3A are identical, the electrode materials and configurations vary internally. (6) Though outlines 4 and 4A are identical, gaps with outline 4A have heavier internal construction to withstand more severe shock and vibration. (2) (3) www.cpclare.com 567 HIGH ENERGY SPARK GAP DEVICES Two Electrode High-Energy Spark Gaps DIMENSIONS mm (inches) MECHANICAL DIMENSIONS TG LEGACY – 1 TG LEGACY 1-A B C A A DIA. B C TG LEGACY – 4/4A TG LEGACY – 2/3/3A 2.94 ± 0.24 DIA. (1.156 ± 0.094) 1.03 NOM. (0.406) 1.03 NOM. (0.406) 1.27 ± 0.32 DIA. (0.500 ± 0.125) 0.91 ± 0.01 DIA. (0.360 ± 0.005) 0.91 ± 0.01 DIA. (0.360 ± 0.005) 7.62 ± 0.32 (3.000 ± 0.318) A TG LEGACY – 7 TG LEGACY – 5 C B 3.34 ± 0.02 DIA. (1.313 ± 0.007) 2.22 ± 0.03 DIA. (.875 ± 0.010) 1.03 NOM. (0.406) 0.64 (0.250) 1.57 DIA. MAX. (0.620) 0.91 ± 0.01 DIA. (0.360 ± 0.005) 1.42 ± 0.08 DIA. (0.560 ± 0.031) A A TG LEGACY – 9 TG LEGACY – 7A A 1.03 NOM. (0.406) B #8 – 32 THREAD 2.26 DIA. (0.890) 1.57 DIA. MAX. (0.620) 1.42 ± 0.08 DIA. (0.560 ± 0.031) 5.08 ± 0.32 (2.000 ± 0.125) A North America: 1-800-CPCLARE 568 Europe: 32-11-300868 Asia: 886-2-2523-6368 Japan: 81-3-3980-2212 1.64 ± 0.04 DIA. (0.645 ± 0.015) HIGH ENERGY SPARK GAP DEVICES Three Electrode High-Energy Spark Gaps SPECIFICATIONS All characteristics at 25˚C. PART APPLIED DC MAIN STATIC DC PEAK CURRENT DELAY TIME PACKAGE NUMBER VOLTAGE BREAKDOWN (kV) (KA)(7) (µS)(8) OUTLINE RANGE KV (±10%) DIMENSION A DIMENSION B DIMENSION C (INCHES) (INCHES) (INCHES TG-7 TG-88 TG-114 TG-121 TG-122 TG-123 TG-124 1.3 - 4.0 1.3 - 4.0 2.5 - 8.0 0.8 - 2.0 1.5 - 4.0 2.3 - 6.0 3.0 - 8.0 5.0 5.0 10.0 2.5 5.0 7.5 10.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 0.1 0.1 0.1 0.3 0.1 0.1 0.1 I-A I-B I-B I-B/I-D I-B/I-D I-B/I-D I-B/I-D 2.427 nom 2.427 nom 2.427 nom 1.990 nom 1.990 nom 1.990 nom 1.990 nom 0.228 max 0.228 max 0.228 max 0.228 max 0.228 max 0.228 max 0.228 max 1.500 max 2.015 max 2.015 max 1.450 max 1.450 max 1.450 max 1.450 max TG-125 TG-126 4.5 - 12.0 6.0 - 16.0 15.0 20.0 20.0 20.0 0.1 0.1 I-B/I-D I-B/I-D 2.67 2.67 0.54 0.54 1.560 1.560 TG-127 TG-151 TG-177 7.5 - 20.0 2.7 - 6.0 0.6 - 1.9 25.0 6.8 2.5 20.0 15.0 10.0 0.1 0.1 0.3 I-B/I-D special III 2.797 nom 1.625 max 0.540 max 0.520 ± .030 2.051 max 0.300 ± .025 TG-178 TG-179 1.5 - 3.5 3.0 - 8.0 5.0 10.0 10.0 10.0 0.2 0.1 III III 1.625 max 1.719 max 0.580 ± .030 0.620 ± .030 0.340 ± .025 0.380 ± .025 TG-180 TG-181 TG-240 4.5 - 12.0 5.3 - 14.0 0.4 - 0.85 15.0 17.5 1.0 10.0 10.0 10.0 0.1 0.1 0.1 III III II 1.906 max 1.906 max 0.750 ± .063 0.725 ± .030 0.725 ± .030 - 0.490 ± .025 0.490 ± .025 - TG-241 TG-242 0.5 - 1.25 0.7 - 1.7 1.5 2.0 10.0 10.0 0.1 0.1 II II 0.750 ± .063 0.760 ± .063 - - TG-243 TG-244 0.8 - 2.1 1.2 - 4.2 2.5 5.0 10.0 10.0 0.1 0.1 II II 0.760 ± .063 0.760 ± .063 - - TG-245 TG-246 TG-247 2.0 - 6.2 3.5 - 8.5 4.5 - 11.0 7.5 10.0 12.5 10.0 10.0 10.0 0.1 0.15 0.15 II II II 0.760 ± .063 0.790 ± .063 0.790 ± .063 - - TG-248 7.0 - 12.5 15.0 10.0 0.15 II 0.830 ± .063 TG-1208 8.3 - 22.2 25.0 - 30.0 20.0 0.1 I-B 2.797 nom 0.515 ± .020 2.051 max (7) The peak current is a conservative maximum for an approximately triangular pulse with a 50µs half-width. (8) Delay time is for Mode A operation when the applied voltage is 80% of the main static breakdown and the trigger pulse reaches 150% of the maximum trigger voltage. ORDERING INFORMATION A complete part number is represented by the information in the Part Number column of the specification table. www.cpclare.com 569 HIGH ENERGY SPARK GAP DEVICES Three Electrode High-Energy Spark Gaps MECHANICAL DIMENSIONS DIMENSIONS mm (inches) TG LEGACY – 1A TG LEGACY 1-B B C A #6 – 32 THREAD A DIA. B 0.79 ± 0.16 (0.313 ± 0.063) C TG LEGACY 1-D TG LEGACY II B 11.11 MAX. (0.438) A A 16.67 ± 0.79 DIA. (0.656 ± 0.031) 25.40 ± 1.59 (1.000 ± 0.063) 1.59 DIA. TYP. (0.063) 12.70 ± 1.59 (0.500 ± 0.063) C 4.76 ± 1.59 (0.188 ± 0.063) TG LEGACY – OUTLINE III A B 2.22 ± 0.03 DIA. MAX. (0.875 ± 0.010) 2.22 ± 0.03 DIA. MAX. (0.875 ± 0.010) C 1.90 (0.075) 1.90 (0.075) 4.76 (0.188) 6.17 ± 0.25 DIA. (0.243 ± 0.010) North America: 1-800-CPCLARE 570 0.76 NOM. (0.030) Europe: 32-11-300868 2.54 (0.100) 33.35 ± 1.59 DIA. (1.313 ± 0.063) 13.97 DIA. MAX. (0.550) Asia: 886-2-2523-6368 Japan: 81-3-3980-2212