B57236S0309L002

Overview

The B57236S0309L002 is a leaded NTC thermistor from the B57236S series, designed for inrush current limiting. It features a nominal resistance of 3 Ohms at 25°C with a tolerance of ±15%. The component supports a maximum steady-state current of 5 A and operates within a temperature range of -55°C to 170°C. Physical dimensions include an 11.5 mm diameter disk with a thickness of approximately 6 mm. It utilizes tin-plated copper leads for through-hole mounting and holds certifications including VDE, UL, IEC, and CQC.

Feature Summary

• Negative temperature coefficient characteristic for effective inrush current suppression
• Robust construction with coated disk design for environmental protection
• Compliance with international safety standards for industrial applications

Applications

• Switch-mode power supply input stages
• Industrial control system power inputs
• Consumer electronics AC/DC conversion circuits

Procurement Notes

Verify the specific suffix L002 against official TDK documentation to confirm the 15% tolerance rating, as other variants in this series may differ. Ensure the selected package type matches the required tape and reel or bulk configuration for automated assembly processes. Cross-reference certification marks such as VDE and UL to meet regional regulatory requirements for the target equipment.

Selection Notes

Select this component when a 3 Ohm initial resistance is required to limit peak charging currents in capacitive loads. The 5 A steady-state rating suits moderate power applications. Consider the thermal time constant and energy absorption capabilities relative to the specific circuit's discharge profile. Ensure the operating environment stays within the specified -55°C to 170°C range for reliable performance.

Part Context

This part belongs to the B57236S0***M0** / L0** family of NTC thermistors manufactured by EPCOS, now integrated into TDK Electronics. These components are specialized for protecting electronic circuits against high inrush currents during startup. The series offers various resistance values and tolerances to match different power supply designs, providing a cost-effective solution for surge protection in both industrial and consumer markets.

Replacement Considerations

Direct substitutes include B57236S0309M051, which shares similar electrical characteristics but carries a ±20% tolerance instead of ±15%. Verify that the alternative variant meets the specific tolerance requirements of the original design before substitution.