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2SA733(A)-ND-A is listed in the Single Bipolar Transistors range at ChipApex. The manufacturer field lists Renesas Electronics Corporation. Its product description is SMALL SIGNAL BIPOLAR TRANS PNP. Review the specifications below when checking this part for your BOM.
The 2SA733(A)-ND-A is a PNP silicon small-signal bipolar junction transistor manufactured by Renesas Electronics Corporation. It features a maximum collector current of 0.1 A and a collector-emitter breakdown voltage of 50 V. The device has a transition frequency of 100 MHz and a maximum power dissipation of 250 mW. DC current gain (hFE) is specified at 90 minimum when tested at 1 mA and 6 V. The saturation voltage is 300 mV maximum at 10 mA base and 100 mA collector currents. Collector cutoff current is limited to 100 nA. It operates within a temperature range of -55°C to 150°C junction temperature.
Verify component authenticity through authorized channels, as this part number may be subject to obsolescence or discontinuation notices from the manufacturer. Confirm that the specific suffix matches the required datasheet revision. Ensure compliance with RoHS and REACH standards if applicable to the end product. Check for any product change notifications regarding packaging or material composition updates before finalizing procurement plans.
Select this component for low-power PNP applications requiring moderate voltage handling and standard current capabilities. Consider its complementary relationship with the 2SC945 NPN transistor for push-pull configurations. Evaluate thermal management requirements given the 250 mW power dissipation limit in the TO-92 package. Verify that the 100 mA collector current meets the load requirements of the target circuit design.
The 2SA733 series represents a legacy small-signal bipolar transistor line originally developed by NEC, now supported by Renesas Electronics Corporation. This specific variant is designated for customers who have already adopted these products, indicating potential restricted availability or phased support status. The device belongs to the discrete semiconductor category, specifically single bipolar transistors, serving as a foundational component in analog and mixed-signal electronic designs.
BC557ATA is listed as an alternative option from onsemi.
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