SL3210015B

Overview

The Vishay Ametherm SL3210015B is a radial leaded Negative Temperature Coefficient (NTC) thermistor designed as an inrush current limiter. It features a nominal resistance of 10 Ohms with a tolerance of ±20% at 25°C. The component supports a maximum steady-state current of 15 A up to 65°C ambient temperature. Its physical dimensions are characterized by a diameter of approximately 31 mm (1.220 inches). This device serves as a direct replacement for wire-wound resistors combined with timers or relays, offering simplified circuit protection against high initial surge currents.

Feature Summary

• Radial leaded NTC thermistor construction for through-hole mounting
• Provides automatic inrush current limiting without external control circuits
• Serves as a single-component alternative to resistor-timer-relay combinations

Applications

• Power supply input stages requiring surge protection
• Motor drive circuits managing startup current spikes
• Transformer primary side protection in industrial equipment

Procurement Notes

Verify the specific suffix 'B' against the manufacturer's latest datasheet to confirm exact dimensional tolerances and marking codes. Ensure the application environment does not exceed the 65°C thermal limit for continuous 15 A operation. Cross-reference the 10 Ohm resistance value with system design requirements to prevent excessive voltage drop during normal operation.

Selection Notes

Select this component when a robust, passive solution for high-current surge suppression is required. The 10 Ohm resistance value must align with the specific impedance needs of the target circuit. Consider the 31 mm package size for adequate heat dissipation and mechanical clearance within the final assembly enclosure.

Part Context

This part belongs to the Vishay Ametherm SL series of inrush current limiters. These components are engineered for industrial and commercial power applications where reliable surge management is critical. The SL series utilizes specialized ceramic materials to achieve stable performance across varying thermal conditions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing footprints and thermal profiles before substituting with generic equivalents.