igh Value Thick Film esistors High Value Value Thick ThickFilm Film Series Welwyn Component Resistors Resistors Welwyn Components GC Series GC Series igh working voltage to 10kV * High High working voltage to 10kV voltage to 10kV alue up *stoValue 1Gworking ohm up to 1G ohm upproduct to 1G ohm *s Value Custom available ustom product available product available *s Custom High stability thick film igh stability thick film s High stability thick film Electrical Data ectrical Data GC55 Power rating at 70C watts 0.25 Resistance range ohms 47k to GC55 900 meg Limiting element voltage Volts dc or ac Peak er rating at 70C stance rangeTCR (20C to 70C) ophpm m/sC sisltaangce tolerance ting elementRveo Volts dc or ac Peak% Values es 140 C/watt Dimensions (mm) and Weight (g) PCB d nom. mounting centres bend radius Wt nom. GC55 6.2 2.5 21.0 0.6 10.2 0.6 0.3 GC65 9.0 3.6 19.6 0.8 13.7 1.2 0.6 GC70 14.5 5.3 ensions (mm) and Weight (g) 23.6 0.8 20.3 1.2 1.1 Construction PCB Min mounting bend Thick film material is fired on to high grade ceramic rods. L max. D max. f min. nom.and the centres radius Tin plated steel caps are forcedfitted termination welded to21.0 the caps. The 6.2wires are2.5 0.6value is obtained 10.2 by a0.6 helical cut in the film and finally the resistor body is given a 9.0 3.6 19.6 0.8 13.7 1.2 high temperature protective coating. Material 0.8 20.3 90 1.2 Solder coated copper wire. The terminations satisfy the requirements of 70 - 55 to 155 f min. structionStrength 70 100 - 55 to 155 MinC D max. 23.6 10000 700 90 140 L max. 14.5 5.3 Terminations 3500 1, 2, 5 Type 0 47k to 1G E24 & E96 preferred bient temperature range 5 1, 2, 5 Physical Data ysical Data 1.0 to 900 meg % mal impedance 5 1407 0k GC70 10000 E24 & E96 preferred ppm/CC stance tolerance 47k to 1G 0.5 700 1700 C/watt (20C to 70A C ) mbient temperature range 1.0 3500 47k to 900 meg volts Thermal impedance 0.5 0.25 volts GC70 47k to 900 mGC65 eg 1700 watts Isolation voltage tion voltage GC65 d D L f Solderability The terminations meet the requirements of Wt IEC 115-1, Clause 4.17.3.2. nom. Marking 0.3 d D L f 1% tolerance resistors are colour coded with 5 bands, 2% 0.6 and 5% tolerance have 4, IEC 62 colours are used. 1.1 Solvent Resistance The body protection and marking are resistant to all normal industrial cleaning fluids for printed circuitthe boards. Solderability The suitable terminations meet requirements of IEC 115-1, Clause 4.17.3.2. film material is fired on high grade ceramic rods. IECto 68.2.21. ated steel caps are force fitted and the termination Marking are welded to the caps. The value is obtained by a General Note 1% tolerance resistors are colour coded with 5 bands, 2% General al cut in the film Note and finally the resistor body is given a Welwyn Components reserves the right to make changes in product specification without notice or liability. TT electronics reserves the right to make changes in product specification without notice or liability. subsidiary of and 5% tolerance have 4, IEC 62 coloursA are used. All information is subjectcoating. to Welwyn's own data and is considered accurate at time of going to print. temperature protective All information is subject to TT electronics' own data and is considered accurate at time of going to print. TT electronics plc www.bitechnologies.com www.irctt.com www.welwyn-tt.com (c) Welwyn Components Limited * Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 (c) TT electronics plc822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com minations Solvent Resistance 11.09 10. 11 The body protection and marking are resistant to all normal High Thick Film HighValue Value Thick Resistors Resistors Film Welwyn Components GC GC Series Series Performance Data Maximum Typical R% 1 0.5 Overload R% 1 0.2 Climatic R% 1 0.25 Climatic category R% Temperature rapid change R% 1 0.15 Resistance to Solder Heat R% 0.2 0.03 Vibration and bump R% 0.1 Voltage proof volts Load at rated power: 1000 hrs at 70c Derating Zero at 155C 55/155/56 0.02 1000 min. N.B. This product can be custom built to meet specific voltage coefficient or pulse requirements. Packaging The standard method of packaging GC resistors is taped in ammo packs. Taped resistors on reel or loose packed components can also be supplied by special request. In the case of tape packed components the usable lead length is reduced by the width of the tape. A detailed taping specification is available on request. Type b c GC55/GC65 52 5 GC70 67 10 Figure 2 c f1 6 f2 b 6 Body Location f1 - f2 1.4 mm Ordering Procedure Example: GC55 at 4.7 megohms and 2% tolerance in ammo pack box of up to 5000 pieces GC55- 4M7GI Type Value (use IEC62 code) Tolerance (use IEC62 code) F G J 1% 2% 5% Packing I Ammo GC55 GC65 GC70 Up to 5000/box Up to 2500/box Up to 1000/box Standard General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics' own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK 11.09 Telephone: +44 (0) 1670 (c) TT electronics plc822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com 10. 11