BD681STU-ON

$0.24

Description：TRANS NPN DARL 100V 4A TO-126-3
Series：-

SKU:a82925ddee81 Category: Single Bipolar Transistors Brand: onsemi

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Product introduction

Product Detailed Parameters

Description：TRANS NPN DARL 100V 4A TO-126-3
Series：-
Mfr：onsemi
Package：Bulk
Transistor Type：NPN - Darlington
Current - Collector (Ic) (Max)：4:00 AM
Voltage - Collector Emitter Breakdown (Max)：100 V
Vce Saturation (Max) @ Ib, Ic：2.5V @ 30mA, 1.5A
Current - Collector Cutoff (Max)：500µA
DC Current Gain (hFE) (Min) @ Ic, Vce：750 @ 1.5A, 3V
Power - Max：40 W
Frequency - Transition：-
Operating Temperature：150°C (TJ)
Mounting Type：Through Hole
Package / Case：TO-225AA, TO-126-3
Supplier Device Package：TO-126-3
Grade：-
Qualification：-

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BD681STU-ON

Overview

The BD681STU is a single NPN power Darlington transistor manufactured by onsemi. It features a maximum collector-emitter voltage (VCEO) of 100 V and a maximum DC collector current (IC) of 4 A. The device utilizes a monolithic Darlington configuration with an integrated antiparallel collector-emitter diode. It is housed in a TO-225AA package, also known as CASE77, designed for through-hole mounting. The component operates within a temperature range of -55 °C to +150 °C junction temperature.

Feature Summary

Monolithic Darlington configuration with integrated antiparallel collector-emitter diode
High transition frequency (fT) performance
Good hFE linearity characteristics

Applications

Power switching applications
Linear amplifier circuits
Motor control systems

Procurement Notes

Verify the specific suffix STU against the official onsemi datasheet to confirm the exact package variant and marking code. Ensure the ordering part number matches the required thermal and mechanical specifications for your PCB layout. Confirm RoHS compliance status directly from the manufacturer's documentation prior to procurement.

Selection Notes

Select this component for high-gain amplification or switching tasks requiring substantial current handling capabilities. The integrated flyback diode simplifies circuit design for inductive loads. Consider the thermal resistance of the TO-225AA package when designing heat dissipation strategies for continuous operation at high currents.

Part Context

This device belongs to the BD681 series of bipolar power transistors. It serves as the NPN counterpart to the BD680 PNP Darlington transistor. The series is characterized by planar base island technology, offering robust performance in power electronics applications where high current gain and voltage tolerance are critical requirements.

Replacement Considerations

Check for direct cross-reference part numbers such as BD681 from other manufacturers like STMicroelectronics. Verify pinout compatibility and electrical parameter equivalence 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

Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.

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

Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.

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.