DTC143ZKAT146

DTC143ZKAT146 is a digital transistor (NPN) in the DTC family with an integrated base resistor. It lets you drive small loads directly from a microcontroller without needing an external base resistor, simplifying circuits and improving drive consistency.
Key points:
- Built-in base bias resistor, suitable for TTL/CMOS logic levels.
- Used as a low-side switch for loads like LEDs, small relays, or other transistors.
- Package is a small three-pin SMD device; typical pinout: pin 1 = base (through internal resistor), pin 2 = emitter, pin 3 = collector.
- Connecting emitter to ground and the load between Vcc and the collector provides easy switching from a microcontroller output.
Benefits:
- Fewer components, compact PCB, predictable base current, quick switching.
Note:
- Exact electrical specs (max collector current, saturation voltage, gain, and packaging) are variant-specific. Refer to the DTC143ZKAT146 datasheet for precise numbers.

DTC143ZKAT146 is an NPN digital transistor with a built‑in base resistor. Common cross-references include ON Semiconductor PDTC143E / PDTC143EU. For an exact match, verify the package (e.g., SOT-23/DIP) and base‑resistor value in the datasheet.

Here are the key features of DTC143ZKAT146:
- NPN digital transistor with built-in base resistor (Rb)
- No external base resistor required
- Logic-level input; can be driven directly from microcontrollers
- Suitable for switching loads (LEDs, small relays, optocouplers)
- Low input current required to turn on
- Small SMD package (SOT-23/3-pin common for DTC parts)
- RoHS compliant; designed for compact, low-power circuits
- Designed for moderate load drive with fast switching (exact Ic/Vce specs in datasheet)
Note: For precise electrical specs (Ic max, Vceo, input resistor value, package details), please consult the official datasheet for DTC143ZKAT146.

Pin count: 6 pins.
Function: DTC143ZKAT146 is a dual NPN digital transistor with built‑in base resistors and a common emitter. It provides two protected switch outputs.
Typical pinout (SOT-23-6):
- Pin 1: IN1
- Pin 2: IN2
- Pin 3: E (common emitter)
- Pin 4: C1 (OUTPUT1)
- Pin 5: C2 (OUTPUT2)
- Pin 6: NC (no connection)

Manufacturer: Toshiba Electronics (Toshiba Electronic Devices & Storage Corporation).
Type of company: A Japanese multinational electronics and semiconductor company that designs and manufactures semiconductor devices and other electronic components.

DTC143ZKAT146 is a digital transistor (NPN with built-in base resistor). Applications include:
- Direct-drive switching of LEDs and indicators from microcontroller I/Os
- Driving small loads such as relays, optocouplers, and small motors (low current)
- Interface/level-shifting for logic signals in consumer, automotive, and industrial electronics
- BOM and PCB space reduction (no external base resistor required)

The DTC143ZKAT146 is supplied in a SOT-23 (3-pin, surface-mount) package. The "AT146" suffix denotes tape-and-reel packaging for automated assembly.