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Product Detailed Parameters
- Description：TRANS NPN 45V 0.8A SOT-23-3
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Transistor Type：NPN
- Current - Collector (Ic) (Max)：800 mA
- Voltage - Collector Emitter Breakdown (Max)：45 V
- Vce Saturation (Max) @ Ib, Ic：700mV @ 50mA, 500mA
- Current - Collector Cutoff (Max)：20nA
- DC Current Gain (hFE) (Min) @ Ic, Vce：250 @ 100mA, 1V
- Power - Max：330 mW
- Frequency - Transition：100MHz
- Operating Temperature：-55°C ~ 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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Overview
The BCW66HTA is a 45V NPN medium power transistor manufactured by Diodes Incorporated. It features a maximum continuous collector current of 800mA and a collector-base breakdown voltage of 75V. The device operates within a temperature range of -55°C to +150°C. Key electrical characteristics include a static forward current transfer ratio (hFE) ranging from 80 to 630, depending on the operating point. The transition frequency is specified at 100MHz. Power dissipation capabilities vary based on mounting conditions, with thermal resistance values provided for junction-to-ambient and junction-to-lead configurations.
Feature Summary
- High continuous collector current capability up to 800mA
- Low saturation voltage performance under specified drive conditions
- Automotive-grade variant available separately as BCW66HQ
- Lead-free and RoHS compliant construction
Applications
- General-purpose switching circuits
- Amplification applications
- Medium power transistor stages
Procurement Notes
Verify the specific ordering suffix against official Diodes Incorporated documentation to confirm packaging details and reel specifications. Ensure that the selected component matches the required marking code EH for the SOT23 package. Confirm compliance with relevant environmental directives such as RoHS 3 if applicable to your manufacturing process. Cross-reference the datasheet revision date to ensure access to the most current electrical characteristics and mechanical dimensions.
Selection Notes
Select this component when an NPN transistor with high current handling and low saturation voltage is required in a compact surface-mount form factor. Consider the complementary PNP type BCW68H for push-pull configurations. Evaluate thermal management requirements based on the specific PCB copper area and ambient conditions, as power dissipation ratings are dependent on these factors. Verify that the hFE range meets the gain requirements of the intended circuit design.
Part Context
The BCW66HTA belongs to the BCW66H series of NPN general-purpose transistors produced by Diodes Incorporated. This series is designed for use in small SOT23 packages suitable for surface-mounted device applications. The product line emphasizes high reliability and compliance with automotive standards through its qualified variants. It serves as a robust solution for medium power applications requiring efficient switching and amplification capabilities.
Replacement Considerations
The BCW66HQ is noted as an automotive-compliant part within the same family. For complementary PNP operations, the BCW68H is the designated match. Other manufacturers produce similar SOT23 NPN transistors with comparable voltage and current ratings, but direct substitution requires verification of pinout compatibility and electrical parameter alignment.
