B57236S0120M051

Overview

The B57236S0120M051 is a negative temperature coefficient (NTC) thermistor designed for inrush current limiting. It features a nominal resistance of 12 Ohms at 25°C with a tolerance of ±20%. The component supports a maximum steady-state current of 3.2 A and has a maximum rated power of 2.1 W. It utilizes a radial leaded package with a disc diameter of 11.5 mm, width of 6 mm, and a lead spacing of 5 mm. The operating temperature range spans from -55°C to +170°C.

Feature Summary

• Provides effective suppression of high inrush currents during power-up sequences.
• Features self-resetting capability that returns to high resistance state after cooling.
• Constructed with coated disk design suitable for through-hole PCB mounting.

Applications

• Power supply input stages
• Switching mode power supplies (SMPS)
• Electronic ballasts

Procurement Notes

Verify the specific part number suffix against official TDK documentation to ensure correct resistance value and tolerance. Confirm that the radial lead pitch matches the target PCB footprint dimensions. Check RoHS compliance status if required by assembly specifications. Ensure thermal management allows adequate heat dissipation within the specified operating temperature range.

Selection Notes

Select this component based on the required steady-state current rating and initial resistance value. Verify that the physical dimensions fit the available board space. Consider the thermal time constant for response speed requirements. Ensure the voltage rating meets the circuit's peak inverse voltage conditions.

Part Context

This device belongs to the B57236S series of NTC thermistors manufactured by EPCOS, now part of TDK Electronics. The series is specifically engineered for circuit protection applications where controlling surge currents is critical. These components are widely used in industrial and consumer electronics for reliable power management.

Replacement Considerations

Compatible substitutes include other 12 Ohm NTC inrush limiters with similar current ratings and package dimensions. Verify electrical parameters such as B-value and thermal time constant before substitution. Ensure mechanical compatibility with existing mounting holes and lead configurations.