the surgx product family is specifically designed to protect sensitive electronic circuits from the threat of electrostatic discharge (esd). surgx products react almost instantly to the transient voltage and effectively clamp it below 60 v, meaning less voltage stress during the clamp period and greater ic protection. the design of surgx products inherently produces a low capaci- tance part. in the off-state surgx is virtually invisible to the circuit. installed from signal line to ground, the surgx device exhibits a high impedance and low capacitance that makes it transparent to high speed digital circuits. signals are not distorted or disrupted. with surgx devices, waveform definition stays true and high-speed signals do not suffer. surgx products uti- lize a unique polymer-based material. the nature of the material creates a bi-directional part, which means that only one device is required to provide complete esd protection regardless of the surge polarity. the combination of this material with proven thick film on ceramic technology produces a reliable, surface mount product that will help protect mobile communications, computers, data processing, test equipment, and many other electronic applications from esd. description: part ratings and characteristics: features: ?exceeds testing requirements outlined in iec 61000-4-2 ?extremely low capacitance ?very low leakage current ?fast response time ?bi-directional ?surface mount ?nickel & tin/lead plated performance characteristics units min typ max continuous operating voltage vdc - - 6 clamping voltage 1 v - 35 60 trigger voltage 2 v 150 300 esd voltage capability 4 kv - 8 15 capacitance (@ 1 mhz) pf - 0.25 1 leakage current (@ 6 vdc) na - <10 <100 peak current 1,4 a - 30 45 operating temperature ? -40 +25 +85 esd pulse withstand 1,3 # pulses 20 - - notes: 1. per iec 61000-4-2, 30a @ 8kv, level 4, clamp measurement made 30 ns after initiation of pulse, all tests in contact discharge mode. 2. trigger measurement made using tlp method (see page 5). 3. parts will remain within the specifica- tions listed in the above table after a minimum of 20 esd pulses. 4. surgx devices are capable of with- standing up to a 15 kv, 45 a esd pulse. device ratings are given at 8 kv per note 1, unless otherwise specified. environmental specifications: ?humidity, steady state: mil-std-202f, method 103b, 90-95% rh, 40?, 96 hrs. ?thermal shock: mil-std-202, method 107g, -65? to 125?, 30 min. cycle, 5 cycles ?vibration: mil-std-202f, method 201a,(10 to 55 to 10 hz, 1 min. cycle, 2 hrs each in x-y-z) ?chemical resistance: astm d-543, 24 hrs @ 50?, 3 solutions (h 2 o, detergent solution, defluxer) ?full load voltage: 24 vdc, 1000 hrs, 25? ?solder leach resistance and terminal adhesion: per eia-576 ?solderability: mil-std-202, method 208 (95% coverage) surgx 41206 four element array polymer esd suppressor
generaliz ed iv cur ve (150 ns pulse, see tables and graphs for numbers) v c = clamping voltage v t = trigger voltage w 0.5 (.020) 0.7 (.028) 0.8 (.031) 0.8 (.031) mm (inches) mm (inches) recommended solder pad outline (per ipc-sm-782) 4.00.1 (.157.004) 4.00.1 (.157.004) 2.00.05 (.079.002) 8.00.2 (.315.008) 1.5+0.1/-0 (.056+.004/-0) 1.750.1 (.059.004) 13.00.5 (.512.020) 10.01.5 (.394.059) 178.02.0 (7.008.080) 20.5 (.807) 2.0 (.080) b a 3.50.05 (.138.002) 60.01.0 (2.362.040) 1.00.2 (.040.008) dimension a b 3.5+0.2 (.138+.008) 1.9+0.2 (.075+.008) definition of terms product dimension tape-and-reel specification clamping voltage - the voltage at which the surgx device stabilizes during the transition from high to low impedance. this is the voltage experienced by the circuit, after stabilizing, for the duration of the esd transient. trigger voltage - the voltage at which the surgx device begins to function. when the esd threat voltage reaches this level, the surgx device begins the transition from high impedance to low impedance, shunting the esd energy to ground. threat voltage - the voltage that the test equipment is set to operate (i.e. the voltage across the discharge capacitor). lwhabcd 3.2?.2 1.6?.2 0.8 max 0.4?.05 0.8 typ. 0.4 typ. 0.2?.1 (.126?008) (.063?008) (.032 max) (.016?002) (.031 typ.) (.016 typ.) (.008?004) 2 surgx 41206 four element array polymer esd suppressor l b c d a h
3 surgx 41206 four element array polymer esd suppressor
4 surgx 41206 four element array polymer esd suppressor
test methodology full product characterization requires testing in a variety of scenarios. different test methods reveal unique information about the device response. evaluating the results for all of the tests is crucial to fully understanding the device operation. two different test methods have been employed to understand the surgx device response to an overvoltage event. electrostatic discharge (esd) pulse the esd pulse is the defining test for an esd protective device. the esd pulse is an extremely fast rising transient event. the pulse, as characterized in iec 61000-4-2, has a rise time of less than 1 ns, peak currents up to 45 a, and voltage levels to 15 kv. characteristics determined by this test are those such as voltage overshoot, peak voltage, clamping voltage, and peak current. due to the extremely fast rate of rise of the esd pulse, the test setup can have a definite impact on the above factors. variables such as wiring inductance and probe capacitance can produce inaccurate readings on an otherwise capable oscilloscope. transmission line pulse (tlp) the transmission line tester implements a controlled impedance cable to deliver a square wave current pulse. the advantage of this technique is that the constant current of the square wave allows the behavior of the protection structure to be more accurately studied. the actual implementation of this technique produces a waveform that has a slightly slower rise time than the esd pulse but can be correlated to deliver approximately the same surge current and energy. this controlled impedance pulse provides a more accurate depiction of the trigger voltage of the device because of the reduced voltage overshoot caused by a fast rising transient and the reactive components of the test fixture. device application surgx devices are applicable to most signal line circuits. it is applied in a shunt-connected manner. surgx devices are not applicable on lines where lightning or load switching transients are present. surgx devices are ideal for use in computers and computer-related equipment, such as modems, keyboards, and printers. surgx devices are also well suited for portable electronic equipment such as mobile telephones, test equipment, and card scanners. typical applications in from peripheral device to logic circuitry from logic circuitry driver/ receiver ic supply voltage current flow under surge conditions signal line in signal line out normal current esd tvs esd tvs ic chip normal current out to peripheral device 41206esda surgx device (2) data bus 5 surgx 41206 four element array polymer esd suppressor
part numbering note: spacing in part number is shown for clarity only. device part number contains no spaces (e.g.41206esda-tr1) device marking surgx devices are not marked. there are no distinguishing characteristics within the product family, other than package sizes, that require differentiation at this time. processing recommendations surgx devices currently have a convex profile on the top surface of the part. this profile is a result of the construction of th e device. surgx devices can be processed using standard pick-and-place equipment. the placement and processing techniques for surgx devices are similar to those used for chip resistors or chip capacitors. packaging configuration packaging options device characteristics a = standard 41206 surgx esd device designator esd -tr1 a -tr1 = (standard) 5,000 pcs, tape-and-reel -sp1 = (samples) 10 pcs on tape, in bag surgx 41206 four element array polymer esd suppressor visit us on the web at www.cooperet.com 3601 quantum boulevard boynton beach, florida 33426-8638 tel: +1-561-752-5000 toll free: +1-888-414-2645 fax: +1-561-742-1178 this bulletin is intended to present product design solutions and technical information that will help the end user with design applications. cooper electronic technologies reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. cooper electronic technologies also reserves the right to change or update, without notice, any technical informa tion contained in this bulletin. once a product has been selected, it should be tested by the user in all possible applications. ov-3102 2/00 ?cooper electronic technologies 2000 surgx is a registered trademark of surgx corp.
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