SL1547003

Inrush Current Limiters (ICL) Overview

The Vishay Ametherm SL1547003 is a Negative Temperature Coefficient (NTC) thermistor designed as an inrush current limiter. It features a nominal resistance of 47 ohms with a tolerance of ±20%. The component supports a maximum steady-state current of 3 A and can withstand up to 50 Joules of recommended energy. Mechanical specifications include a 16 mm diameter, radial leads with a 7.8 mm spacing, and a lead diameter of 1 mm. It is rated for voltages of 115 VAC and 230 VAC.

Inrush Current Limiters (ICL) Feature Summary

• Functions as an NTC thermistor to limit inrush current during power-up
• Capable of absorbing high energy pulses without failure
• Radial leaded construction suitable for through-hole PCB mounting

Inrush Current Limiters (ICL) Applications

• Power supply input stages
• Transformer protection circuits
• Motor drive inputs

Inrush Current Limiters (ICL) Procurement Notes

Verify the specific datasheet version for the SL1547003 to confirm thermal characteristics and derating curves. Ensure the application voltage does not exceed the 230 VAC rating. Confirm that the expected inrush energy remains within the 50 J recommendation to maintain long-term reliability. Check lead spacing compatibility with the target PCB footprint.

Inrush Current Limiters (ICL) Selection Notes

Select this component when a 47-ohm initial resistance is required to suppress startup currents. The 3 A steady-state rating determines the continuous load capacity. Consider the 16 mm package size for mechanical clearance. Evaluate the thermal environment to ensure the device operates within safe temperature limits during continuous conduction.

Inrush Current Limiters (ICL) Part Context

This part belongs to the SL15 series of inrush current limiters from Vishay Ametherm. The series offers various resistance values and physical sizes to match different power requirements. The SL1547003 specifically addresses applications needing moderate current limiting with a compact radial form factor.

Inrush Current Limiters (ICL) Replacement Considerations

Cross-reference with other Vishay Ametherm SL15 variants or equivalent NTC thermistors from other manufacturers. Verify that substitute parts match the 47 ohm resistance, 3 A current rating, and 16 mm diameter constraints.