The wire wound FD model resistors are low power resistors in a ceramic case. The main characteristics for these resistors are their compactness and small dimensions that enable use of these products on electronic boards. In fact, the terminals can be soldered and easily deformed.
| Nominal resistance values | serie E 12 (10%), Serie E 24 (5%) |
| DIN 41426 | |
| Climatic Category (according to IEC 68) | 55/255/10 |
| Soldering test (solder bath 260°C x 10s) | ≤ 1% + 0,1 Ω |
| Temperature change test (-55°C / +200°C) | ≤ 2% + 0,1 Ω |
| Humidity test (21 days 40°C / 95% relative humidity) | ≤ 3% + 0,1 Ω |
| Change in ohm value with Ts = 255°C | 1,000 h : -1.5 fino a +4.0% |
| 10,000 h : -2.0 fino a +6.0% | |
| 100,000 h : -3.0 fino a +10.0% |
The values indicated are valid for 99.7% of all resistors. For resistors with low ohm values, the changes indicated can exceed 0.1 Ω. Reliability: Approximate value at an ambient temperature of 70°C, relative atmospheric humidity of 25% and a surface temperature (Ts) of 255°C: <= 100 x 10-9/h for total fault.
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Industrial resistors, for starting and braking motors, railway traction, grounding resistors, medium and high power resistive loads, toroidal rheostats and flush-mount potentiometers.
ItalOhm S.r.l. Via della Meccanica, 13 – 36100 Vicenza – ITALY Tel: 0039 0444 965 365 Fax: 0039 0444 965 366 e-mail: info@italohm.com
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