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HVC Datasheet(PDF) 3 Page - Welwyn Components Limited |
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HVC Datasheet(HTML) 3 Page - Welwyn Components Limited |
3 / 3 page 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 Wr P1 A0 D1 D0 P0 P2 T2 T1 K0 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 ±0.5 ±0.3 ±0.1 ±0.1 ±0.05 ±0.1 ±0.2 ±0.1 ±0.05 ±0.1 ±0.1 ±0.1 ±0.05 Nom. ±0.15 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°C. 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°C (see performance above). For soldered resistors, the joint temperature should not exceed 110°C. This condition is met when the stated power levels at 70°C 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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