2SB857-D-BP

Single Bipolar Transistors Overview

The 2SB857-D-BP is a silicon PNP power transistor manufactured by Micro Commercial Components. It features a TO-220 package with a collector connected to the flange. Key electrical ratings include a collector-emitter voltage of -50 V, a collector-base voltage of -70 V, and a continuous collector current of -4 A. The device supports a junction temperature range from -55°C to +150°C and offers a DC current gain (hFE) rank D ranging from 160 to 320 at an IC of -1 A.

Single Bipolar Transistors Feature Summary

• Designed for low frequency power amplifier applications
• Flange-mounted collector facilitates efficient heat dissipation
• Epoxy casing meets UL 94 V-0 flammability rating

Single Bipolar Transistors Applications

• Low frequency power amplifiers
• General purpose switching circuits
• Power supply output stages

Single Bipolar Transistors Procurement Notes

Verify the specific hFE binning classification required for your circuit design, as the datasheet defines distinct gain ranges for ranks B, C, and D. Confirm that the bulk packaging format aligns with your assembly line handling capabilities. Ensure thermal management solutions are adequate for the specified power dissipation limits under your operating conditions.

Single Bipolar Transistors Selection Notes

Select this component when high collector current capability and robust thermal performance are required in a single-transistor configuration. The wide operating temperature range makes it suitable for industrial environments. Consider the specific hFE rank needed for consistent amplification or switching characteristics in your schematic design.

Single Bipolar Transistors Part Context

This part belongs to the 2SB857 series of silicon PNP transistors produced by Micro Commercial Components. The series is engineered for power handling tasks where moderate voltage ratings and significant current capacity are necessary. The TO-220 form factor provides a standardized mounting interface for various power electronics designs.

Single Bipolar Transistors Replacement Considerations

Check pinout compatibility and absolute maximum ratings against existing designs. Verify that alternative components meet the -4 A current and -50 V voltage requirements. Ensure thermal resistance characteristics are comparable to maintain safe junction temperatures.

Single Bipolar Transistors FAQ

What is the collector connection type?

The collector is electrically connected to the metal flange of the TO-220 package.

What does the 'D' suffix indicate?

The 'D' suffix specifies the DC current gain (hFE) ranking, which ranges from 160 to 320 under standard test conditions.

Is the component halogen-free?

Standard units are not explicitly stated as halogen-free; the '-HF' suffix must be added to the ordering code to request halogen-free versions.