2SA1859A

Single Bipolar Transistors Overview

The Sanken Electric 2SA1859A is a Silicon PNP Epitaxial Planar Transistor designed for audio output driver and TV velocity-modulation applications. It serves as the complement to the 2SC4883/A type. The device features an absolute maximum collector-emitter voltage (VCEO) of -150 V for the standard variant and -180 V for the 'A' suffix version. It supports a continuous collector current (IC) of -2 A and a maximum power dissipation (PC) of 20 W at a case temperature of 25°C. The DC current gain (hFE) ranges from 60 to 240, with a typical cut-off frequency (fT) of 30 MHz. The component operates within a junction temperature range of -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• Epitaxial planar silicon construction optimized for high-voltage switching and amplification
• Designed specifically as a complementary pair to the 2SC4883/A NPN transistor
• Capable of handling significant peak currents suitable for audio output stages

Single Bipolar Transistors Applications

• Audio output driver circuits
• TV velocity-modulation systems

Single Bipolar Transistors Procurement Notes

Verify the specific voltage rating required for your design when selecting between the standard 2SA1859 (-150 V) and the 2SA1859A (-180 V) variants. Confirm that the TO-220F package dimensions align with your thermal management strategy. Note that the manufacturer explicitly states this component is not recommended for new designs; ensure legacy compatibility requirements justify its continued use in your project specifications.

Single Bipolar Transistors Selection Notes

Select the 2SA1859A variant if the application demands a higher collector-emitter breakdown voltage of -180 V compared to the standard -150 V rating. Ensure the thermal design accounts for the 20 W power dissipation limit at 25°C case temperature, utilizing appropriate heatsinking for sustained operation. Verify that the hFE range of 60 to 240 meets the gain requirements of the driving circuitry.

Single Bipolar Transistors Part Context

This component belongs to Sanken Electric's discrete semiconductor lineup, specifically within their bipolar junction transistor category. It is engineered for general-purpose power amplification tasks where high voltage tolerance and reliable switching characteristics are necessary. The TO-220F package provides a robust mechanical structure for through-hole mounting in industrial and consumer electronic assemblies.

Single Bipolar Transistors Replacement Considerations

The datasheet identifies the 2SC4883/A as the complementary NPN counterpart. No other direct substitute part numbers are documented in the official specifications.