1206 2010 2512 notes power rating @70? watts 0.3 0.5 1 limiting element voltage volts 1000 2000 3000 dc or ac peak overload voltage (2s) volts 1500 3000 4000 resistance range ohms 100k to 100m consult factory for out of range values resistance tolerance % 0.5,1,2,5,10 see table of value ranges tcr ppm/? 100 ambient temperature range ? -55 to +155 values e24 & e96 preferred any value to order thermal impedance ?/w 200 80 70 tolerance % size 10 5 2 1 0.5 1206 100k to 100m 100k to 100m 100k to 10m 100k to 2m n/a 2010 100k to 100m 100k to 100m 100k to 10m 100k to 10m n/a 2512 100k to 100m 100k to 100m 100k to 10m 100k to 10m 100k to 10m high voltage chip resistors HVC series continuous voltages up to 3kv overload voltages up to 4kv values up to 100m tolerances to ?.5% robust thick film construction general note welwyn components reserves the right to make changes in product specification without notice or liability. all information is subject to welwyn s own data and is considered accurate at time of going to print. ?welwyn components limited ?bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 ?facsimile: +44 (0) 1670 829465 ?email: info@welwyn-tt.com ?website: www.welwyn-tt.com electrical data issue d ?11.05 a subsidiary of tt electronics plc welwyn components 84 value ranges (ohms) dimensions (mm) & weight (g) l w t a b c wt. 1206 3.2?.2 1.6?.2 0.6?.1 0.35?.2 1.95 min 0.35?.2 0.010 2010 5.1?.2 2.5?.2 0.7?.1 0.45?.2 3.70 min 0.4?.25 0.035 2512 6.5?.2 3.2?.2 0.7?.1 0.45?.2 5.00 min 0.4?.2 0.055 physical data t w a a b l wrap-around terminations (3 faces) c
high voltage chip resistors HVC series ?welwyn components limited bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 ?facsimile: +44 (0) 1670 829465 ?email: info@welwyn-tt.com ?website: www.welwyn-tt.com issue d ?11.05 welwyn components 85 maximum typical load at rated power: 1000 hours rated load @ 70? ? r% 1206 : 2 1206 : 1 2010/2512 : 1 2010/2512 : 0.25 shelf life test: 12 months at room temperature ? r% 0.1 0.02 derating from rated power at 70? zero at 155? short term overload: lesser of 6.25 x rated power or 1.5 x lev for 2s ? r% 2 0.2 lightning strike: 1.2/50? & 10/700? - see graph for peak voltage ? r% 0.5 0.2 dry heat: 1000 hours at 155? ? r% 0.5 0.1 long term damp heat ? r% 1 0.25 temperature rapid change ? r% 0.25 0.05 resistance to solder heat ? r% 0.25 0.05 voltage proof volts 500 1206 : -25 1206 : -15 voltage coefficient of resistance ppm/v 2010 : -15 2010 : -5 2512 : -5 2512 : -1.5 performance data construction resistive thick film material, overglaze and organic protection are screen printed on a 96% alumina substrate. the design and laser adjustment of the resistive element optimises the limiting element voltage of the resistor. terminations the chips are supplied with wrap-around terminations suitable for soldering. consult factory for alternative termination options. solderability the terminations have an electroplated nickel barrier and tin finish. this ensures excellent ?each?resistance properties and solderability. marking the body protection is resistant to all normal cleaning solvents suitable for printed circuits. the chips are not marked and the relevant information on type, value, tolerance date code and quantity are recorded on the reel. 0.1 1 10 100 8 6 4 2 0 lightning s trike performan c e re s i s tan c e value (mohm s ) peak voltage (kv) 1 20 6 - 1 .2/50 1 20 6 - 1 0/700 20 1 0- 1 .2/50 20 1 0- 1 0/700 25 1 2- 1 .2/50 25 1 2- 1 0/700 0.1 1 10 100 3500 3000 2500 2000 1500 1000 500 0 maximum continuou s voltage re s i s tan c e value (mohm s ) voltage (v) HVC 1 20 6 HVC25 1 2 HVC20 1 0 commo d ity chip note: maximum peak voltage tested was 6kv; performance beyond this is estimated.
type HVC 2512 - 4m7 f t 1 8 size value (use iec62 code) tolerance (use iec62 code) packing d 0.5% j 5% f 1% k 10% g2% t3 tape 1206 or 2010 3000/reel standard t18 2512 1800/reel 2.5 0.5 13 0.5 33 1.0 marking (both sides) 0.8 0.15 80 2 178 2 wr p 1 a 0 b 0 d 1 d 0 p 0 p 2 gf w e t 2 t 1 k 0 t high voltage chip resistors HVC series ?welwyn components limited bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 ?facsimile: +44 (0) 1670 829465 ?email: info@welwyn-tt.com ?website: www.welwyn-tt.com issue d ?11.05 welwyn components 86 packaging HVC resistors are supplied taped and reeled as per iec 286-3. tape and reel dimensions (mm) qty. wr w p1 p0 p2 d0 d1 e f a0 b0 k0 t t1 t2 per ?.5 ?.3 ?.1 ?.1 ?.05 ?.1 ?.2 ?.1 ?.05 ?.1 ?.1 ?.1 ?.05 nom. ?.15 reel 1206 9 8 4 4 2 1.5 1 1.75 3.5 1.95 3.55 1.0 0.2 0.05 1.3 3000 2010 13 12 8 4 2 1.5 1.5 1.75 5.5 2.79 5.89 0.91 0.28 0.06 1.21 3000 2512 13 12 8 4 2 1.5 1.5 1.75 5.5 3.61 6.96 1.17 0.28 0.06 1.45 1800 ordering procedure example: HVC2512 at 4.7 megohms and 1% tolerance on a reel of 1800 pieces - application notes HVC resistors are ideally suited for handling by automatic methods due to their rectangular shape and the small dimensional tolerances. electrical connection to a ceramic substrate or to a printed circuit board can be made by reflow or wave soldering of wrap-around terminations. wrap-around terminations provide good leach properties and ensure reliable contact. due to the robust construction, the HVC can be immersed in the solder bath for 30 seconds at 260?. this enables the resistor to be mounted on one side of a printed circuit board and wire-leaded components applied on the other side. HVC resistors themselves can operate at a maximum temperature of 155? (see performance above). for soldered resistors, the joint temperature should not exceed 110?. this condition is met when the stated power levels at 70? are used. the pcb layout should avoid tracks running between the HVC mounting pads, as this would compromise the lev. the lev stated applies to operation at sea-level pressure, in a non-condensing atmosphere and non-contaminating environment. voltage derating should be applied if low pressure, high humidity or contamination may be encountered. the termination clearance dimension (b) should be used in conjunction with the creepage limit applicable to the circuit application in order to determine the derated lev.
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