High Value Thick Film Resistors Resistors High Value Thick Film Welwyn Components Resistors High Value Thick Film GC Series working voltage to 10kV •Resistors GCHigh Series Welwyn Components Value up to 1G ohm •GC • High Seriesworking voltage to 10kV Custom available •• Value up product to 1G ohm High working voltage to 10kV High stability thick film •• Custom Values upproduct to 900M available • High stability film Custom product thick available High stability thick film Surface mount ZI-form option All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2) Electrical Data Electrical Data PPoow weerrrraatitninggata7t 07°0C°C Ressiissttaanncceerarnagnege enetnvtovltoalgteage Lim miittiinnggeelelemm GC55 GC55 GC65 GC65 GC70 watts watts 0.25 0.25 0.5 0.5 1.0 ohms oh4m k etgo 900 m 4e7gk to 900 4m7ekgto 33M 7ks to 90407m 47ekg to 900 m Volts dV coolrtsacdcPeoark ac Peak 1700 IIssoollaattiioonnvvooltlatgaege volts TCR (20°C to 70°C) ppm/°C Resistance tolerance % TCR (20°C to 70°C) Resistance tolerance 3500 3500 volts 700 700 ppm/°C 100 100 Thermal impedance °C/watt TAhmebrim enatl tiem mppeedraatn ucree range 1,5 % Values Values 1700 °C °C/watt Ambient temperature range E24 & E96 preferred 140 90 140 GC70 1.0 47k to 33M 10000 10000 1,5 E24 & E96 preferred °C 70 90 - 55 to 155 70 - 55 to 155 Physical Data Physical Data Dimensions (mm) and Weight (g) Dimensions (mm) and Weight (g) Type L max. D max. f min. d nom. GC55 6.2 2.5 21.0 0.6 Type GC65 L9.0 max. GC55 GC70 6.2 14.5 GC65 9.0 PCB Min mounting bend Wt centres PCB radius 10.2mounting 0.6 D max. 19.6 f min. 0.8d nom. 3.6 13.7 centres 1.2 2.5 21.0 0.6 5.3 23.6 0.8 20.3 10.21.2 3.6 19.6 0.8 13.7 GC70 14.5 Construction Min nom. bend 0.3 Wt radius 0.6 nom. 0.61.1 0.3 1.2 0.6 5.3 23.6 0.8 20.3 Thick film material is fired on to high grade ceramic rods. Tin plated steel caps are force fitted and the termination Construction wires are welded to the caps. The value is obtained by a Thick material fired on the to high grade helical film cut in the film isand finally resistor bodyceramic is given arods. Tin steel caps are force fitted and the termination highplated temperature protective coating. d D L d f D L f 1.2 1.1 The terminations meet the requirements of Solderability IEC 115-1, Clause 4.17.3.2. Solderability The terminations meet the requirements of Marking 115-1, 1% tolerance resistors are IEC colour codedClause with 5 4.17.3.2. bands, 2% and 5% tolerance have 4, IEC 62 colours are used. Marking wires are welded to the caps. The value is obtained by a Solvent Resistance Terminations 1% tolerance resistors are colour coded with 5 bands, 2% helical cut in the film and finally the resistor body is given a The body protection and marking to all normal Material Solder coated copper wire. and 5% tolerance haveare 4, resistant IEC 62 colours are used. high temperature protective coating. Strength The terminations satisfy the requirements of IEC 68.2.21. Terminations Material industrial cleaning fluids suitable for printed circuit boards. Solder coated copper wire. Strength Solvent Resistance The body protection and marking are resistant to all normal industrial cleaning fluids suitable for printed circuit boards. The terminations satisfy the requirements of IEC 68.2.21. Welwyn Components reserves the right to make changes in product specification without notice or liability. GeneralNote Note General TT Electronics 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. All information is subject to TT Electronics’ own data and is considered accurate at time of going to print. BI Technologies IRC Welwyn © Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) plc 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com © TT Electronics General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. A subsidiary of TT electronics plc http://www.ttelectronics.com/resistors 11.09 11.16 High ThickThick Film HighValue Value Resistors Resistors Film Welwyn Components GC GCSeries Series Performance Data Maximum ∆ R% Load at rated power: 1000 hrs at 70°c Typical 1 0.5 Derating Zero at 155°C 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 0.02 Voltage proof volts 55/155/56 1000 min. N.B. This product can be custom built to meet specific voltage coefficient or pulse requirements. Packaging Figure 2 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. c These products are also available in a range of lead forming options. In particular, GC65 & GC70 are available in ZI-form SMD format packed in blister tape - see: http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/ZI-form.pdf http://www.ttelectronicsresistors.com/pdf/datasheet/ZI-form.pdf Type b GC55/GC65 52 5 GC70 67 10 f1 f2 b 6 Body Location f 1 6 – f 2 ≤ 1.4 mm c Ordering Procedure Example: GC55 at 4.7 megohms and 1% tolerance in ammo pack box of up to 5000 pieces GC55– 4M7F I Type Value (use IEC62 code) Tolerance (use IEC62 code) F 1% J 5% Packing I Ammo General Note GC55 GC65 GC70 Up to 5000/box Up to 2500/box Up to 1000/box Standard BI Technologies IRC Welwyn 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. © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) plc 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com © TT Electronics http://www.ttelectronics.com/resistors 11.09 11.16