ROHM DTC124XM DTC124XE DTC124XKA DTC124XUA User Manual
Summary
ROHM DTC124X series are NPN 100mA/50V digital transistors with built-in bias resistors R1=22k ohm and R2=47k ohm in an epitaxial planar silicon structure. The integrated thin-film bias resistors with complete isolation allow negative input biasing and eliminate parasitic effects, enabling simple inverter circuit configuration without external components. Available in four surface mount packages (VMT3, EMT3, UMT3, SMT3) with taping packaging for automated assembly, the devices simplify circuit design by requiring only on/off condition settings. They target inverter, interface, and driver circuits in compact electronic devices and consumer product applications.
Page 1 Text Content
100m A / 50V Digital transistors (with built-in resistors)
DTC124XM / DTC124XE / DTC124XUA / DTC124XKA
Applications
0. 1M in
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 negative biasing of the input. They also have the advantage of almost completely eliminating parasitic effects. 3) Only the on/off conditions need to be set for operation, making the device design easy.
Structure NPN epitaxial planar silicon transistor (Resistor built-in type)
Dimensions (Unit : mm)
DTC124XM DTC124XE
(3) 0. 1M in
0. 3M in (2) (1)
0.8 (1) IN (1) GND
(2) GND ROHM : EMT3 (2) IN ROHM : VMT3 (3) OUT EIAJ : SC-75A (3) OUT
Abbreviated symbol : 45 Abbreviated symbol : 45
DTC124XUA 2.0 0.9 DTC124XKA
(1) GND
0.65 0.65 0.95 0.95 (1) GND
(2) IN 0.15
0.15 (2) IN
1.3 (3) OUT
1.9 (3) OUT
Each lead has same dimensions
ROHM : UMT3 ROHM : SMT3 Each lead has same dimensions
EIAJ : SC-70 Abbreviated symbol : 45 EIAJ : SC-59 Abbreviated symbol : 45
Packaging specifications Inner circuit
Package VMT3 UMT3EMT3 SMT3
Packaging type Taping Taping Taping Taping
R1 OUT
Code T2L TL T106 T146 IN
Basic ordering R2
Part No. unit (pieces)
DTC124XM
DTC124XE
DTC124XUA IN OUT
DTC124XKA
www.rohm.com
1/2 2009.06 - Rev.B
○c 2009 ROHM Co., Ltd. All rights reserved.
Page Summary Contents For ROHM DTC124XM DTC124XE DTC124XKA DTC124XUA User Manual
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 3 |
| File Size | 141.62 KB |
| Published | June 17, 2026 |
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Frequently Asked Questions
What is the maximum output current of the DTC124X series transistors?
The maximum output current is 100mA.
Can these transistors be used in medical instruments?
No, they are not designed for medical or other high-reliability safety-critical equipment.
What are the built-in resistor values?
R1 is 22kΩ and R2 is 47kΩ.
What is the maximum supply voltage?
The maximum supply voltage VCC is 50V.