DTC143ESATP

Overview

The DTC143ESATP is a single NPN digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors. It operates with a maximum collector-emitter voltage of 50V and a continuous collector current of 100mA. The device incorporates thin-film resistors for R1 and R2, both typically valued at 4.7kΩ, resulting in a resistance ratio of 1. Key electrical characteristics include a minimum DC current gain (hFE) of 30 and a transition frequency of 250MHz. It is housed in an SPT package (EIAJ SC-72) and supports a junction temperature range from -55°C to +150°C.

Feature Summary

• Built-in bias resistors enable inverter circuit configuration without external input components.
• Thin-film resistor construction allows negative input biasing and minimizes parasitic effects.

Applications

• Inverter circuits
• Interface applications
• Driver circuits

Procurement Notes

Verify component status as the DTC143ESATP is listed as obsolete or discontinued in distributor databases. Confirm availability through authorized channels or secondary markets if sourcing is required. Ensure compliance with RoHS directives and check for specific packaging constraints such as Ammo Pack formats when placing orders.

Selection Notes

Select this component for designs requiring a pre-biased NPN transistor with integrated 4.7kΩ base and emitter resistors. The SPT package is suitable for through-hole mounting where space permits. Verify that the 50V rating and 100mA current capacity align with the target application's load requirements and operating conditions.

Part Context

This part belongs to the ROHM DTC143 series of digital transistors. Variants within this family share similar electrical specifications but differ in packaging types such as SOT-23, SOT-323, and EMT3. The DTC143ESA designation refers to the standard plastic encapsulated version, while the ATP suffix indicates specific tape-and-reel or ammo pack handling configurations.

Replacement Considerations

Direct substitutes include other DTC143 series variants like DTC143ECA or DTC143EU3, provided the package footprint matches the design. Cross-reference pinouts carefully as different packages may have varying terminal arrangements for Input, Ground, and Output.