DTC143ZCAT116

Overview

The DTC143ZCAT116 is a single NPN digital transistor from the ROHM DTx series, housed in an SOT-23-3 surface-mount package. It integrates internal bias resistors with a typical ratio of 10:1, featuring a base resistor (R1) of 4.7 kΩ and an emitter-base resistor (R2) of 47 kΩ. Key electrical specifications include a collector-emitter breakdown voltage (VCEO) of 50 V, a continuous collector current (Ic) of 100 mA, and a DC current gain (hFE) minimum of 80 at 10 mA and 5 V. The device supports a maximum operating frequency of 250 MHz, has a power dissipation rating of 200 mW, and operates within a temperature range up to +150°C.

Feature Summary

• Integrates built-in bias resistors to simplify circuit design by eliminating external components.
• Provides high-speed switching capabilities suitable for interface and driver applications.
• Offers low saturation voltage for efficient signal processing.

Applications

• Inverter circuits
• Interface logic driving
• Driver stages for small-signal loads

Procurement Notes

Verify the specific suffix CAT116 against the official datasheet to confirm the standard commercial grade variant. Ensure the ordering code matches the required tape-and-reel packaging format. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and avoid counterfeit components during sourcing.

Selection Notes

Select this component when a single NPN switch with integrated biasing is required. The 4.7 kΩ input resistance and 10:1 resistor ratio are critical for matching specific drive currents. Confirm that the 50 V voltage rating and 100 mA current capacity meet the load requirements. Verify thermal constraints given the 200 mW power dissipation limit in the SOT-23 package.

Part Context

This part belongs to the ROHM DTx series of digital transistors, which combine bipolar junction transistors with pre-bias resistors. The DTC143ZCAT116 specifically denotes the NPN polarity, Z resistor ratio (10:1), C package type (SOT-23), and AT116 tape-and-reel configuration. It is distinct from other ratios like X (2.1:1) or E (1:1) within the same family.

Replacement Considerations

Compatible substitutes include DTC143XCA variants for different resistor ratios or DTC143ECA models. For automotive-grade requirements, consider the DTC143ZCAHZGT116, which holds AEC-Q101 qualification. Ensure pinout compatibility and electrical parameters match before substitution.