B57211P0200M351

Overview

The B57211P0200M351 is a PTC inrush current limiter from the TDK P11 series. It features a nominal resistance of 20 Ohms with a ±20% tolerance at 25°C. The component supports a maximum steady-state current of 3 A and exhibits a minimum resistance of 380 mOhms at maximum current. It has a cylindrical diameter of 13.00 mm (0.512 inches) with a lead spacing of 7.50 mm (0.295 inches). The device is RoHS compliant and packaged in tape and reel format.

Feature Summary

• Provides effective suppression of high inrush currents during power-up to protect downstream components.
• Features self-resetting capability that automatically returns to high resistance state after fault conditions clear.
• Utilizes positive temperature coefficient characteristics for reliable thermal protection without manual intervention.

Applications

• Power supply input stages
• Consumer electronics AC/DC adapters
• Industrial control systems

Procurement Notes

Verify the specific ordering suffix M351 to confirm tape and reel packaging requirements. Ensure the selected variant matches the required 20 Ohm resistance and 3 A current rating for the target circuit design. Confirm RoHS compliance status if environmental regulations apply to the final assembly process.

Selection Notes

Select this component based on the required 20 Ohm initial resistance and 3 A steady-state current capacity. Consider the 13 mm diameter for available board space and the 7.50 mm lead spacing for PCB footprint compatibility. Evaluate thermal dissipation needs relative to the application's duty cycle and ambient temperature constraints.

Part Context

This part belongs to the EPCOS P11 series of inrush current limiters, designed for general-purpose circuit protection. The series offers various resistance and current ratings to suit different power levels. The B57211P0200M351 specifically addresses applications requiring moderate inrush limiting with standard through-hole mounting configurations.

Replacement Considerations

BN-LG10Y200MYB by Bourns Inc. is a documented alternative substitute part number for this component.