SL321R036

Overview

The SL321R036 is a negative temperature coefficient (NTC) thermistor inrush current limiter from the Vishay Ametherm SL32 series. It features a nominal resistance of 1 Ohm and supports a continuous current rating of 36 A. The component has a cylindrical diameter of 32 mm with radial leads spaced at 17.1 mm. It operates within a temperature range of -40°C to +150°C and includes UL approval for safety compliance.

Feature Summary

• Provides effective suppression of high inrush currents during power-up sequences
• Automatically transitions to low-resistance state after initial thermal activation
• Radial leaded construction facilitates through-hole printed circuit board mounting

Applications

• Power supply input stages requiring surge protection
• Transformer primary circuits limiting magnetizing inrush
• Capacitive load charging control in industrial electronics

Procurement Notes

Verify that the specific part number matches the required 36 A continuous current rating and 1 Ohm resistance value. Confirm that the 32 mm physical dimensions fit the designated PCB footprint and clearance requirements. Ensure the operating environment remains within the specified -40°C to +150°C temperature limits for reliable performance.

Selection Notes

Select this component when the application demands a 36 A steady-state current capacity with a 1 Ohm initial impedance. The 32 mm diameter provides sufficient thermal mass for high-energy dissipation scenarios. Consider the radial lead spacing of 17.1 mm for appropriate board layout and mechanical stability during assembly.

Part Context

This device belongs to the SL32 series of NTC inrush current limiters designed for robust industrial applications. The series offers various resistance and current combinations, with the SL321R036 representing the 36 A variant. These components are engineered to protect sensitive downstream electronics from damaging startup surges.

Replacement Considerations

Cross-reference other Vishay Ametherm SL32 series parts for alternative current ratings. Verify that any substitute maintains identical electrical parameters and physical dimensions to ensure compatibility with existing designs.