7-11 file number 3603.3 1-800-999-9445 or 1-847-824-1188 | copyright littelfuse, inc. 1999 sgt23b13, SGT27B13, sgt27b27 bidirectional transient surge suppressors (to-202 surgector) these surgector devices are designed to protect telecommunication equipment, data links, alarm systems, power supplies and other sensitive electrical circuits from damage by switching transients, lightning strikes, load changes, commutation spikes and line crosses. bidirectional surgector devices are constructed with a thyristor whose gate region contains a special diffused section which acts as a zener diode. this zener diode section permits anode voltage turn on of the structure. initial clamping by the zener diode section, and fast turn on by the thyristor, provide excellent voltage limiting even on very fast rise time transients. the thyristor also features high holding current, which allows the surgector to recover to its high impedance off state after a transient. all these devices are supplied in a 2 lead, modi?d to-202 package. equivalent schematic symbols features clamping voltage . . . . . . . . . . . . . . . . . . . . . 230v or 270v rated for peak transient surge current high minimum holding current low on-state voltage ul recognized file #e135010 to std 497b applications secondary protectors for: - telephone -fax - modem - line cards - slic alarm systems packaging modified to-202 mt2 mt1 mt2 mt1 mt2 mt2 mt1 mt2 data sheet july 1999 [ /title (sgt2 3b13, sgt27 b13, sgt27 b27) /sub- ject (bidi- rec- tional tran- sient surge sup- pres- sors (surge ctor)) /autho r () /key- words (surge ctor, tvs, tran- sient sup- pres- sion, protec- tion, tele- com,
7-12 absolute maximum ratings t c = 25 o c sgt23b13 SGT27B13 sgt27b27 units continuous off state voltage: v dm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v rm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 200 235 235 235 235 v v transient peak surge current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i tsm 1 s x 2 s (note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 s x 20 s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 s x 560 s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 s x 1000 s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . one half cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50hz to 60hz (note 2) one second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50hz to 60hz, halfwave 300 200 125 100 60 30 300 200 125 100 60 30 600 400 250 200 60 30 a a a a a a operating temperature (t a ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to 85 -40 to 85 -40 to 85 o c storage temperature range (t stg ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to 150 -40 to 150 -40 to 150 o c notes: 1. unit designed not to fail open below: 900a. 2. one every 30s maximum. caution: stresses above those listed in ?bsolute maximum ratings may cause permanent damage to the device. this is a stress o nly rating and operation of the device at these or any other conditions above those indicated in the operational sections of this speci?ation is not implied. electrical speci?ations at case temperature, t c = 25 o c, unless otherwise speci?d parameter symbol test conditions min typ max units off-state current i dm , i rm maximum rated v dm , v rm t a = 25 o c t a = 85 o c - - - - 200 100 na a clamping voltage sgt27b27 sgt23b13 SGT27B13 v z i z < 200 a 270 230 270 - - - 325 270 325 v v v breakover voltage sgt27b27 sgt23b13 SGT27B13 v bo dv/dt = 100v/ s - - - - - - 345 240 345 v v v holding current sgt27b27 sgt23b13 SGT27B13 i h 270 130 130 - - - - - - ma ma ma on-state voltage v t i t = 10a - - 2 v main terminal capacitance sgt27b27 sgt23b13 SGT27B13 c o v dm = v rm = 50v, frequency = 1mhz - - - 80 50 50 - - - pf pf pf sgt23b13, SGT27B13, sgt27b27
7-13 performance curves figure 1. typical volt-ampere characteristics for all types figure 2. typical capacitance vs voltage for sgt23b13 and SGT27B13 figure 3. typical capacitance vs voltage for sgt27b27 figure 4. normalized zener voltage vs temperature for all types figure 5. normalized v bo vs dv/dt for all types figure 6. normalized holding current vs temperature for all types v dm v i dm v bo v z ma i h i t a v t 190 170 150 130 110 90 70 50 30 10 20 0 40 60 80 100 120 140 160 180 200 voltage (v) capacitance (pf) 300 270 240 210 150 120 90 60 30 0 20 0 40 60 80 100 120 140 160 180 200 voltage (v) capacitance (pf) 1.2 1.1 1 0.9 0.8 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 ambient temperature ( o c) normalized zener voltage (v) 1.50 1.25 1.00 0.75 0.50 10 100 1,000 10,000 rate of rise of voltage (v/ s) normalized breakdown voltage (v) 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1 0.9 0.8 0.7 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 ambient temperature ( o c) normalized holding current (ma) sgt23b13, SGT27B13, sgt27b27
7-14 mechanical dimensions ordering information terms and symbols v dm (maximum off-state voltage) - maximum off-state voltage (dc or peak) which may be applied continuously. v rm (maximum reverse voltage) - maximum reverse- blocking voltage (dc or peak) which may be applied. i tsm (maximum peak surge current) - maximum nonrepetitive current which may be allowed to ?w for the time state. t a (ambient operating temperature) - ambient temperature range permitted during operation in a circuit. t stg (storage temperature) - temperature range permitted during storage. i dm (off-state current) - maximum value of off-state current that results from the application of the maximum off-state voltage (v dm ). i rm (reverse current) - maximum value of reverse current that results from the application of the maximum reverse voltage (v rm ). v z (clamping voltage) - off-state voltage at a speci?d current. v bo (breakdown voltage) - voltage at which the device switches from the off-state to the on-state. i h (holding current) - minimum on-state current that will hold the device in the on-state after it has been latched on. v t (on-state voltage) - voltage across the main terminals for a speci?d on-state current. c o (main terminal capacitance) - capacitance between the main terminals at a speci?d off-state voltage. l d l 1 h 1 b 2 b b 1 e e 1 c j 1 a 45 o 1 2 active element to-202 modi?d 2 lead jedec style to-202 short tab plastic package symbol inches millimeters notes min max min max a 0.130 0.150 3.31 3.81 - b 0.024 0.028 0.61 0.71 2, 3 b 1 0.045 0.055 1.15 1.39 1, 2, 3 b 2 0.270 0.280 6.86 7.11 - c 0.018 0.022 0.46 0.55 1, 2, 3 d 0.320 0.340 8.13 8.63 - e 0.340 0.360 8.64 9.14 - e 1 0.200 bsc 5.08 bsc 4 h 1 0.080 0.100 2.04 2.54 - j 1 0.039 0.049 1.00 1.24 5 l 0.410 0.440 10.42 11.17 - l 1 0.080 0.100 2.04 2.54 1 notes: 1. lead dimension and ?ish uncontrolled in l 1 . 2. lead dimension (without solder). 3. add typically 0.002 inches (0.05mm) for solder coating. 4. position of lead to be measured 0.250 inches (6.35mm) from bottom of dimension d. 5. position of lead to be measured 0.100 inches (2.54mm) from bottom of dimension d. 6. controlling dimension: inch. 7. revision 3 dated 10-94. sgt 27 b 27 holding current in ma divided by 10 type of surgector u: unidirectional s: scr b: bidirectional off-state voltage rating divided by 10 surgector sgt23b13, SGT27B13, sgt27b27
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