DTD133HKT146

Overview

The DTD133HKT146 is a single NPN digital transistor manufactured by Rohm Semiconductor, featuring built-in bias resistors to simplify inverter circuit design. It operates with a maximum supply voltage of 50 V and supports a continuous collector current of 500 mA. The device utilizes a thin-film resistor structure for input isolation, enabling negative-bias capability. Key electrical parameters include a DC current gain (GI) of 56 at 100 µA output, a transition frequency (fT) of 200 MHz, and a power dissipation rating of 200 mW. It is housed in the SMT3 surface-mount package.

Feature Summary

• Built-in bias resistors eliminate the need for external components in inverter configurations.
• Thin-film resistor construction provides complete isolation and allows for negative input biasing.
• Simplified design process through direct On/Off condition setting without complex bias networks.

Applications

• Inverter circuits requiring simplified input biasing
• High-density digital logic interfaces
• Equipment utilizing pre-biased switching applications

Procurement Notes

Verify the specific suffix KT146 corresponds to the SMT3 package and tape-and-reel quantity of 3000 units as documented. Confirm RoHS compliance status and ensure the ordering code matches the exact manufacturer part number to avoid substitution errors during procurement.

Selection Notes

Select this component when a single NPN digital transistor with integrated biasing is required for space-constrained designs. Ensure the application voltage does not exceed 50 V and current requirements remain within the 500 mA limit. Consider the 200 mW power dissipation constraint for thermal management in high-density layouts.

Part Context

This component belongs to Rohm's series of digital transistors that integrate bipolar junction transistors with internal resistors. The DTD133H variant specifically denotes an NPN configuration with defined resistance ratios, designed to replace discrete resistor-transistor combinations in modern surface-mount electronics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout compatibility and electrical specifications before considering any alternative manufacturers or models.