ROHM DTB143TK User Guide
Summary
The DTB143TK is a high-performance digital transistor designed for interface, inverter, and driver circuits. Featuring built-in bias resistors, it significantly simplifies circuit design by eliminating the need for external input components. This manual provides comprehensive technical specifications, including absolute maximum ratings, detailed electrical curves (like DC current gain and saturation voltage), and application guides. It is ideal for electronics designers seeking a reliable, easy-to-implement solution for power switching applications.
Page 1 Text Content
DTB143TK
Transistors
-500m A / -40V Digital transistors (with built-in resistor) DTB143TK
Applications External dimensions (Unit : mm)
Inverter, Interface, Driver
Features
1) Built-in bias resistors enable the configuration of an inverter circuit without connecting external input resistors (see equivalent circuit).
2) The bias resistors consist of thin-film resistors with
complete isolation to allow positive biasing of the input. 0.15
They also have the advantage of almost completely
Each lead has same dimension
eliminating parasitic effects.
ROHM : SMT3 (1) Emitter
3) Only the on / off conditions need to be set for
EIAJ : SC-59 (2) Base
operation, making the device design easy. (3) Collector Abbreviated symbol : F93
Equivalent circuit
Structure 2.
PNP epitaxial planar silicon transistor (Resistor built-in type)
0. 3M in
Packaging specifications
Package SMT3
Packaging type Taping
Code T146 B : Base C : Collector
Basic ordering E : Emitter Part No. unit (pieces)
DTB143TK
Absolute maximum ratings (Ta=25°C)
Symbol Limits Parameter Unit
Collector-base voltage VCBO −50
Collector-emitter voltage VCEO −40
Emitter-base voltage VEBO −5
Collector current IC −500 m A
Collector power dissipation PC m W Junction temperature Tj Storage temperature Tstg −55 to +150
Rev.B 1/2
Page Summary Contents For ROHM DTB143TK User Guide
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 3 |
| File Size | 60.06 KB |
| Published | June 15, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the maximum collector-emitter voltage rating for this device?
The Collector-emitter voltage (VCEO) has an absolute limit of −40 V.
How do the built-in bias resistors simplify circuit design?
They allow the configuration of an inverter circuit without needing external input resistors.
Can this component be used in extremely high-reliability life-safety equipment?
No, it is intended for ordinary electronic devices and should not be used where malfunction endangers human life (e.g., medical or transport equipment).