SL2247003

Inrush Current Limiters (ICL) Overview

The SL2247003 is a negative temperature coefficient (NTC) thermistor from the Vishay Ametherm SL22 series, designed as an inrush current limiter. It features a nominal resistance of 47 Ohms with a tolerance of ±25%. The component has a steady-state current rating of 3 A and a maximum voltage rating of 265 VAC. Mechanically, it utilizes a radial through-hole package with a 22 mm diameter and a lead spacing of 7.8 mm.

Inrush Current Limiters (ICL) Feature Summary

• Provides effective suppression of high inrush currents during power-up sequences to protect downstream circuitry.
• Utilizes NTC characteristics where resistance decreases significantly as temperature rises, allowing efficient steady-state conduction.
• Designed for robust through-hole mounting with standardized lead spacing for easy integration into PCB layouts.

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Transformer primary circuits
• Capacitive load protection

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific suffix 'A' against the official datasheet to confirm mechanical or environmental variations. Ensure the operating environment does not exceed the maximum steady-state current of 3 A at elevated temperatures. Confirm that the 265 VAC rating aligns with the target application's peak line voltage requirements before finalizing procurement.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a 47 Ohm initial resistance is required to limit surge currents for loads drawing up to 3 A. The 22 mm diameter offers higher energy absorption capacity compared to smaller variants like the SL15 series. Ensure the application voltage does not exceed 265 VAC and that through-hole mounting is feasible for the design.

Inrush Current Limiters (ICL) Part Context

This part belongs to the SL22 series of inrush current limiters, which are larger than the SL15 series to handle higher energy loads. It serves as a protective element in AC/DC conversion systems, preventing thermal stress on rectifiers and capacitors during initial energization.

Inrush Current Limiters (ICL) Replacement Considerations

The SL2247003 may be replaced by other Vishay Ametherm SL22 series parts with matching 47 Ohm resistance and 3 A current ratings, provided the physical dimensions and lead spacing are compatible with the existing footprint.

Inrush Current Limiters (ICL) FAQ

What is the maximum steady-state current for the SL2247003?

The maximum steady-state current is rated at 3 A up to 65°C.

Does the SL2247003 support surface mount installation?

No, the SL2247003 is designed for through-hole mounting with radial leads.