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| General Purpose Carbon Film Resistors GCF Series Drop in replacement for CF/CR Low cost Extensive resistance range Wide range of sizes and power ratings RoHS compliant Electrical Data GCF1/4 Power rating @70C Resistance range Limiting element voltage Max overload voltage Dielectric withstanding voltage TCR watts volts volts volts ppm/C 0.125 200 400 300 0.25 250 500 500 GCF1/4S 0.25 200 400 300 GCF1/2 0.5 350 700 700 <10R <10R ~ <60K <60K ~ <200K <200K ~ <1M0 <1M0K ~ 10M Resistance tolerance Standard values Ambient temperature range C Note: 'S' denotes smaller body size - see physical data % GCF1/2S 0.5 250 500 500 : : : : : 5 E24 -55 to +155 GCF1 1 500 1000 1000 GCF1S 1 400 700 700 GCF2 2 500 1000 1000 GCF2S 2 500 800 700 GCF3S 3 500 1000 1000 ohms 1R0-1M0 1R0-10M 1R0-1M0 1R0-10M 1R0-10M 1R0-10M 1R0-10M 1R0-10M 1R0-10M 1R0-10M 0350 0 ~ -500 0 ~ -700 0 ~ -1000 0 ~ -1500 Physical Data L max GCF1/8 GCF1/4 GCF1/4S GCF1/2 GCF1/2S GCF1 GCF1S GCF2 GCF2S GCF3S 3.5 6.8 3.5 10 6.8 16 12 17.5 16 17.5 D max 1.85 2.5 1.85 3.5 3 5.5 5 6.5 5.5 6.5 f min 25 25 25 25 25 25 25 25 25 25 d 0.10 0.5 0.55 0.5 0.6 0.55 0.8 0.63 0.8 0.8 0.8 PCB mounting centres min. Bend Radius Wt. nom. 7.6 10.2 7.6 15.2 10.2 20.3 17.8 22.9 20.3 22.9 0.5 0.55 0.5 0.6 0.55 1.2 0.6 1.2 1.2 1.2 0.1 0.3 0.1 0.55 0.35 1.0 0.65 1.2 1.0 1.2 d D L f General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyns own data and is considered accurate at time of going to print. (c) Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK A subsidiary of TT electronics plc Issue D . 11.06 Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com GCF Series Construction A carbon film is deposited onto a ceramic former. Plated steel caps are then fitted before the resistor is adjusted to value by a helical cut in the film. Termination wires are then welded to the caps and the body of the resistor is protected with an epoxy coating. Terminations Material Strength Hot tin dipped copper wire. The terminations meet the requirements of IEC 68.2.21 SolderabilityThe terminations meet the requirements of IEC 115-1,Clause 4.17.3.2 Marketing Resistance value and tolerance are identified in accordance with IEC 62 4-band colour code. Solvent Resistance The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Performance Data Maximum Change Load life Load life in humidity Temperature rapaid change Derating from rated power at 70C Short term overload Terminal strength Resistance to solder heat Solderability Resistance to solder heat Insulation resistance Dielectric withstanding min DR% DR% DR% DR% DR% 3 5 1 + 0.05W Zero at 155C 1 + 0.05W No evidence of mechanical damage 1 + 0.05W Minimum of 95% coverage No deterioration of protective coating and marking 1000M No evidence of flahover, mechanical damage, arcing of insulation breakdown (c) 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 A . 11.06 GCF Series Packaging All GCF resistors are supplied ammo tape packed ready for loading on to automatic sequencing and insertion machines. Component wires will not protrude beyond the outside edge of the tapes. Alternative packaging available by request GCF 1/4 52 5 52 5 1/4S 52 5 1/2 52 5 1/2S 52 5 1 52 10 1S 52 5 2 67 10 2S 67 10 3S 67 10 W B B Body location f1-f2 < 1.4mm 6 f1 W f2 6 Application Notes If the resistors are to dissipate full rated power, it is recommended that the terminations should not be soldered closer than 4mm from the body. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. GCF resistors can also be supplied with radial, goalpost or lancet pre-formed leads. Consult Factory for details. Radial Goalpost Lanset Ordering Procedure Example: GCF1/4 small size at 10 kilohms and 5% tolerance and ammo packed in a box with a standard quantity of 5000pcs. GCF1 / 4S 10K J A5 Type Value (use IEC62 code) Tolerance (use IEC62 code) J 5% Packing A5 A1 A05 Ammo Pack GCF1 8 , GCF1 4 , GCF1 4 S, GCF1 2 S, GCF1 2 , GCF1, GCF1S, GCF2S GCF2, GCF3S 5000 / Box 1000 / Box 500 / Box (c) 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 A . 11.06 |
Price & Availability of GCF
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