B57236S0120M000

Overview

The B57236S0120M000 is a leaded NTC thermistor from the B57236S0M0 series, designed for inrush current limiting. It features a nominal resistance of 12 Ω at 25°C with a ±20% tolerance and a maximum steady-state current of 3.2 A. The component has a disk body measuring 11.5 mm in diameter and 16 mm in height, with a thermal time constant of 70 s. It operates within a temperature range of -55°C to 170°C and supports a rated AC voltage of 265 V.

Feature Summary

• Provides effective inrush current suppression during power-up cycles
• Features a robust coated disk construction for mechanical stability
• Offers high thermal endurance suitable for demanding environments

Applications

• Power supply input stages
• Switch-mode power unit protection
• General electronic equipment surge mitigation

Procurement Notes

Verify the specific ordering suffix against official TDK documentation to confirm lead length and packaging configuration. Ensure the selected variant matches the required steady-state current and resistance tolerance for the target circuit design. Cross-reference certification marks such as UL or VDE if regulatory compliance is mandatory for the end application.

Selection Notes

Select this component based on the required 12 Ω resistance value and 3.2 A current handling capability. Consider the 70 s thermal time constant for response speed requirements. Verify that the 11.5 mm body size fits the available PCB footprint and that the through-hole mounting style aligns with the assembly process constraints.

Part Context

This part belongs to the B57236S0M0 series of NTC inrush current limiters manufactured by TDK Electronics. The series utilizes specialized ceramic materials to provide reliable surge protection in various electronic systems. These components are widely used in consumer and industrial electronics to protect downstream circuits from initial current spikes.

Replacement Considerations

Compatible substitutes include other 12 Ω NTC inrush limiters with similar 3.2 A ratings and 11.5 mm dimensions, such as variants from Murata or Vishay. Ensure equivalent thermal characteristics and certification approvals when sourcing alternatives.