BCY-59

$25.18

Description：SMALL-SIGNAL BJT
Series：*

SKU:5eeef298282e Category: Single Bipolar Transistors Brand: Microchip Technology

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Product introduction

Product Detailed Parameters

Description：SMALL-SIGNAL BJT
Series：*
Mfr：Microchip Technology
Package：Bulk
Transistor Type：-
Current - Collector (Ic) (Max)：-
Voltage - Collector Emitter Breakdown (Max)：-
Vce Saturation (Max) @ Ib, Ic：-
Current - Collector Cutoff (Max)：-
DC Current Gain (hFE) (Min) @ Ic, Vce：-
Power - Max：-
Frequency - Transition：-
Operating Temperature：-
Mounting Type：-
Package / Case：-
Supplier Device Package：-
Grade：-
Qualification：-

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BCY-59

Overview

The BCY59 is an NPN switching transistor manufactured by Microchip Technology (formerly Philips Semiconductors). It is housed in a TO-18 metal package. The device features a maximum collector-base voltage of 45 V and a maximum continuous collector current of 100 mA. Designed for low-voltage applications, it supports switching and amplification functions. The component operates within standard discrete semiconductor specifications, superseding earlier data sheets from September 1994.

Feature Summary

NPN switching transistor configuration
Low current capability up to 100 mA
Low voltage operation with 45 V maximum rating
TO-18 metal case construction

Applications

General purpose switching circuits
Amplification stages
Low voltage signal processing

Procurement Notes

Verify the manufacturer origin carefully, as the BCY59 was originally a Philips/NXP product. Ensure the specific datasheet version matches your design requirements, noting that newer documentation may supersede older specifications. Confirm the TO-18 package availability and pinout compatibility before integration into existing hardware designs.

Selection Notes

Select this component for applications requiring robust NPN switching in a metal can package. Consider its 45 V voltage limit and 100 mA current capacity when designing load circuits. Verify thermal management needs due to the metal case construction. Compare against modern surface-mount alternatives if space constraints exist.

Part Context

The BCY59 belongs to the BCY58/BCY59 series of NPN switching transistors. It serves as the NPN counterpart to the PNP BCY78 and BCY79 devices. This series is designed for general-purpose low-power switching and amplification tasks in electronic circuits.