3N253

Bridge Rectifier Overview

The onsemi 3N253 is a single-phase bridge rectifier designed for general-purpose power supply applications. It features an average forward current rating of 2.0 A at 50°C and supports a maximum repetitive reverse voltage of 50 V. The device withstands a non-repetitive peak forward surge current of 60 A under standard half-sine-wave conditions. Electrical characteristics include a forward voltage of 1.1 V per element at 3.14 A and a reverse leakage current of 5.0 µA at rated voltage and 25°C. Thermal management allows for a junction temperature range from -55°C to +150°C, with a power dissipation capacity of 4.7 W.

Bridge Rectifier Feature Summary

• Surge overload capability rated at 60 amperes peak for transient protection.
• UL certified construction utilizing molded plastic technique for reliable low-cost performance.

Bridge Rectifier Applications

• General-purpose AC to DC conversion in power supplies
• Bridge rectification circuits requiring 50V reverse voltage ratings
• Industrial equipment power modules

Bridge Rectifier Procurement Notes

Verify the component status carefully before procurement, as this specific part number may be classified as obsolete or not in production by the manufacturer. Confirm availability through authorized distributors to ensure genuine parts and traceability. Review the latest datasheet revisions for any updated specifications or handling requirements prior to finalizing orders.

Bridge Rectifier Selection Notes

Select the 3N253 when a 50V peak reverse voltage rating and 2.0A continuous current are required for single-phase rectification. Ensure the application environment maintains ambient temperatures within limits that allow for proper thermal dissipation of 4.7W. Consider the 60A surge rating for circuits experiencing high inrush currents during startup phases.

Bridge Rectifier Part Context

This component belongs to the 2KBP/3N series of bridge rectifiers manufactured by Fairchild Semiconductor, now part of onsemi. The series utilizes a KBPM package style and covers various voltage ratings from 50V to 1000V. The 3N253 specifically represents the 50V variant within this standardized lineup of molded plastic bridge rectifiers.

Bridge Rectifier Replacement Considerations

Publicly confirmed substitute part numbers for the 3N253 are not available in the provided documentation. Verify compatibility with other 50V, 2A bridge rectifiers in the KBPM package if direct replacements are needed.

Bridge Rectifier FAQ

What is the maximum non-repetitive peak forward surge current?

The device can withstand a non-repetitive peak forward surge current of 60 A for an 8.3ms single half-sine-wave.

What is the thermal resistance from junction to ambient?

The thermal resistance (RθJA) is 18 °C/W per leg when mounted on a PCB with 0.47 × 0.47” (12 × 12mm).

What is the total capacitance per leg?

The total capacitance per leg is 25 pF, measured at VR = 4.0 V and f = 1.0 MHz.