2SB1258

Single Bipolar Transistors Overview

The Sanken Electric USA Inc. 2SB1258 is a Silicon PNP Epitaxial Planar Transistor designed as a complement to the 2SD1785 type. It features a collector-emitter voltage of -100 V and a continuous collector current rating of -6 A, with a pulse current capacity of -10 A. The device provides a minimum DC current gain (hFE) of 1000 at -10 mA collector current and a typical transition frequency of 100 MHz. Maximum power dissipation is rated at 30 W at a case temperature of 25°C. The component utilizes an FM20 (TO-220F) package.

Single Bipolar Transistors Feature Summary

• High DC current gain capability for efficient driver applications
• Fast switching characteristics suitable for solenoid and relay control
• Complementary pairing with NPN types for push-pull configurations

Single Bipolar Transistors Applications

• Driver for Solenoid
• Driver for Relay
• Driver for Motor
• General Purpose Switching

Single Bipolar Transistors Procurement Notes

Verify the specific revision status before procurement, as the datasheet explicitly states this component is not recommended for new designs. Confirm that the FM20 (TO-220F) package dimensions align with existing board layouts. Ensure sourcing channels provide genuine Sanken Electric USA Inc. parts to maintain specified electrical tolerances and thermal performance ratings.

Single Bipolar Transistors Selection Notes

Select this component when a high-gain PNP transistor is required to complement an NPN counterpart like the 2SD1785 in motor or solenoid drive circuits. Consider the 30 W power dissipation limit and the necessity of a heatsink for sustained operation above ambient temperatures. Evaluate the -100 V breakdown voltage against circuit supply rails to ensure adequate safety margins during switching transients.

Single Bipolar Transistors Part Context

This part belongs to the family of Silicon PNP Epitaxial Planar Transistors manufactured by Sanken Electric USA Inc. It is specifically engineered as the complementary pair to the 2SD1785 NPN transistor. The device is housed in the FM20 (TO-220F) plastic package, which facilitates through-hole mounting and effective heat dissipation for medium-power switching applications.

Single Bipolar Transistors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.