BC847BS

Overview

The BC847BS is a dual NPN small-signal bipolar junction transistor (BJT) array manufactured by onsemi. It integrates two independent NPN transistors within a single SOT-363 surface-mount package, designed for general-purpose amplification and switching applications. The device features a collector-emitter voltage rating of 45 V and a continuous collector current capacity of 100 mA per element. Key electrical specifications include a minimum DC current gain (hFE) of 200 at specified test conditions and a transition frequency (fT) of 100 MHz. The maximum power dissipation is rated at 250 mW, with an operating temperature range spanning from -55°C to +150°C.

Feature Summary

• Dual NPN configuration in a compact SOT-363 package for space-constrained designs
• High DC current gain suitable for low-level signal amplification
• Wide operating temperature range for robust performance in varied environments

Applications

• General-purpose amplification circuits
• Signal switching applications
• Complementary pairs with PNP arrays like BC857BS

Procurement Notes

Verify the specific manufacturer source, as the BC847BS designation is widely used across multiple semiconductor vendors including Diotec and SECOS. Confirm that the datasheet provided matches the onsemi specification sheet, particularly regarding the SOT-363 package dimensions and electrical limits. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability.

Selection Notes

Select this component when a dual NPN solution is required in a minimal footprint. Compare the 250 mW power dissipation limit against thermal requirements. Verify that the 45 V breakdown voltage meets circuit constraints. Consider the BC847B single-transistor variant if only one channel is needed, or the BC857BS PNP counterpart for complementary push-pull configurations.

Part Context

The BC847BS belongs to the broader BC847 series of small-signal transistors, which are industry-standard components for low-power electronics. While the base part number often refers to single transistors in SOT-23 packages, the 'S' suffix typically denotes a dual-array configuration in smaller packages like SOT-363 or SC-88. This specific variant consolidates two NPN devices to save board space compared to using discrete single transistors.

Replacement Considerations

Direct pin-compatible replacements include the BCM847BS from Diotec Semiconductor and the BC847BS from other manufacturers such as SECOS. Verify that substitute parts maintain the same SOT-363 footprint and meet the 45V/100mA/250mW ratings. Cross-reference datasheets for hFE binning differences.