GC WELWYN | Alldatasheet
Document overview
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- PDF pages: 2
Technical content
- High working voltage to 10kV
- Value up to 1G ohm
- Custom product available
- High stability thick film GC55 GC65 GC70 Power rating at 70°C watts 0.25 0.5 1.0 Resistance range ohms 47k to 900 meg 47k to 900 meg 47k to 1G Limiting element voltage Volts dc or ac Peak 1700 3500 10000 Isolation voltage volts 700 TCR (20°C to 70°C) ppm/°C 100 Resistance tolerance % 1, 2, 5 Values E24 & E96 preferred Thermal impedance °C/watt 140 90 70 Ambient temperature range °C - 55 to 155 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 B · 03.02 A subsidiary of TT electronics plc Welwyn Components 199 Construction Thick film material is fired on to high grade ceramic rods. Nickel plated steel caps are force fitted and the termination wires are welded to the caps. The value is obtained by a helical cut in the film and finally the resistor body is given a high temperature protective coating. Terminations Material Solder coated copper wire. Strength The terminations satisfy the requirements of IEC 68.2.21. Solderability The terminations meet the requirements of IEC 115-1, Clause 4.17.3.2. Marking 1% tolerance resistors are colour coded with 5 bands, 2% and 5% tolerance have 4, IEC 62 colours are used. Solvent Resistance The body protection and marking are resistant to all normal industrial cleaning fluids suitable for printed circuit boards. Dimensions (mm) and Weight (g) PCB Min mounting bend Wt Physical Data LD f d
© 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 B · 03.02 Welwyn Components 200 b f1 f2 c Body Location f1 – f2 ≤ 1.4 mm 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. Figure 2 Maximum Typical Load at rated power: 1000 hrs at 70°c ∆R% 1 0.5 Derating Zero at 155°C Overload ∆R% 1 0.2 Climatic ∆R% 1 0.25 Climatic category ∆R% 55/155/56 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 1000 min. Performance Data Type GC55 GC65 GC70 Taped (Reeled) 5000 2500 1500 Ammo pack 5000 2500 1000 Small box 250 125 25 Large box 1000 500 250 Standard Quantities Per Spool/Box Type b c GC55/GC65 52 5 GC70 67 10 N.B. This product can be custom built to meet specific voltage coefficient or pulse requirements.