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Eaton ICL250D09 2.5 Ohm 9 mm NTC Inrush Current Limiter
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pEaton ICL250D09 — NTC inrush current limiter, 2.5 Ω at 25 °C, 4 A steady./p
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Eaton ICL250D09 2.5 Ohm 9 mm NTC Inrush Current Limiter
Eaton ICL250D09 2.5 Ohm 9 mm NTC Inrush Current Limiter belongs to the Eaton range. It holds 2.5 ohm at 25 °C, passes up to 4 A steady, on a 9 mm disk.
Technical Data
| Parameter | Rating |
|---|---|
| Parameter | Value |
| Orderable part number | ICL250D09BIM (5.0 mm pitch) / ICL250D09CIM (7.5 mm pitch) |
| Zero-power resistance R25 | 2.5 Ohm at +25 C |
| Tolerance | M = plus/minus 20 % |
| Max steady current | 4 A |
| Beta (25/50) | 2550 K |
| Max capacitance at 240 Vac | 180 uF |
| Dissipation factor | 9 mW/C |
| Thermal time constant | 40 s |
| Body | D09 disk, epoxy sealed radial |
| Operating temperature | -40 C to +170 C |
| Environmental | Halogen free, Pb-free |
Design Notes
- Limits capacitor and transformer inrush by dropping resistance as it heats.
- It does not interrupt a fault — pair it with a fuse or breaker upstream.
- Leave cooling time between power cycles so the disk returns to high resistance.
- Resistance at 25 °C sets the cold-start limiting; the hot value is far lower.
- A disk rated for a higher steady current runs cooler at the same load.
- Beta value 2550 K describes how sharply resistance falls with temperature.
- Continuous current must stay at or below 4 A or the disk self-heats.
Where It Is Used
Typical places this thermistor turns up:
- EV
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