BC81840

$0.09

Description：TRANS NPN 25V 0.8A SOT-23-3
Series：-

SKU:d259798f5c7e Category: Single Bipolar Transistors Brand: Fairchild Semiconductor

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Product introduction

Product Detailed Parameters

Description：TRANS NPN 25V 0.8A SOT-23-3
Series：-
Mfr：Fairchild Semiconductor
Package：Bulk
Transistor Type：NPN
Current - Collector (Ic) (Max)：800 mA
Voltage - Collector Emitter Breakdown (Max)：25 V
Vce Saturation (Max) @ Ib, Ic：700mV @ 50mA, 500mA
Current - Collector Cutoff (Max)：100nA
DC Current Gain (hFE) (Min) @ Ic, Vce：250 @ 100mA, 1V
Power - Max：310 mW
Frequency - Transition：100MHz
Operating Temperature：150°C (TJ)
Mounting Type：Surface Mount
Package / Case：TO-236-3, SC-59, SOT-23-3
Supplier Device Package：SOT-23-3
Grade：-
Qualification：-

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BC81840

Overview

The BC81840 is a PNP silicon planar medium power transistor manufactured by Fairchild Semiconductor. It is designed for switching and amplifier applications, serving as a complement to the BC817/BC818 series. The device is suitable for AF-driver stages and low-power output stages. It features a PNP configuration with a maximum collector-emitter voltage of -45V and a continuous collector current capability of 0.8A. The component is housed in a SOT-23 surface-mount package.

Feature Summary

Designed for switching and amplifier applications
Suitable for AF-driver stages and low power output stages
Complements the BC817/BC818 series

Applications

AF-driver stages
Low power output stages
General purpose switching circuits

Procurement Notes

Verify the manufacturer marking and date code on the physical component against the official Fairchild Semiconductor datasheet specifications. Ensure the part number matches the exact suffix requirements for the specific voltage and current ratings documented in the original product documentation. Confirm RoHS compliance status if required for the specific application environment.

Selection Notes

Select this component when a PNP transistor with medium power handling capabilities is required for audio driver or low-power output applications. Consider its compatibility with the BC817/BC18 series for complementary circuit designs. Evaluate the thermal performance within the SOT-23 package constraints for the intended load conditions.

Part Context

This component belongs to the BC817/BC818 family of PNP transistors. It shares similar functional characteristics but may differ in specific electrical limits or packaging options compared to other members of the series. It is widely used in consumer electronics and industrial control systems requiring reliable PNP switching.

Replacement Considerations

Direct substitutes include the BC817-40 and BC818-40 from various manufacturers. Verify pinout compatibility and electrical parameters such as Vceo and Ic before substitution.

How to buy

Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.

Payment Method

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Delivery time

In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.

Freight calculation

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Mode of Transportation

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Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.