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Product Detailed Parameters
- Description：TRANS PREBIAS PNP 50V SMT3
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Resistors Included：R1 and R2
- Transistor Type：PNP - Pre-Biased
- Current - Collector (Ic) (Max)：30 mA
- Voltage - Collector Emitter Breakdown (Max)：50 V
- Resistor - Base (R1)：47 kOhms
- Resistor - Emitter Base (R2)：22 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce：56 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic：300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max)：500nA
- Frequency - Transition：250 MHz
- Power - Max：200 mW
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SMT3
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Overview
DTA144WKAT146 is a PNP digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors within a compact SOT-346 (TO-236) surface-mount package. The device integrates a single NPN structure with an input resistance (R1) of 47 kΩ and an emitter-base resistance (R2) of 22 kΩ. It supports a maximum collector-emitter voltage (VCEO) of -50 V and a continuous collector current (IC) of -100 mA. Key electrical parameters include a minimum DC current gain (hFE) of 68 at specified test conditions and a power dissipation rating of 150 mW. The component operates within a storage temperature range of -55°C to +150°C and complies with RoHS standards.
Feature Summary
- Integrates PNP transistor with dual internal resistors to simplify circuit design
- Compact SMT3 (SOT-346) footprint suitable for high-density PCB layouts
- Eliminates need for external biasing components, reducing assembly steps
Applications
- Microcontroller I/O port interface and level shifting
- Low-power signal switching and logic buffer applications
- Driver circuits for small-signal relays or LED indicators
Procurement Notes
Verify the specific suffix T146 confirms tape-and-reel packaging containing 3000 units per reel. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure design reviews account for the non-recommended status for new designs if applicable to legacy sourcing strategies.
Selection Notes
Select this component when a PNP configuration with 47 kΩ input and 22 kΩ emitter-base resistance is required. Compare against DTA144EKA variants if different resistor ratios are needed. Verify thermal management capabilities align with the 150 mW dissipation limit in the target application environment.
Part Context
The DTA144 series belongs to ROHM's standard digital transistor lineup designed for replacing discrete resistor-transistor networks. This specific model utilizes the SMT3 package code, corresponding to the JEITA SC-59A / EIAJ SC-75A form factor. It serves as a direct replacement for older TO-236 configurations in space-constrained consumer electronics.
Replacement Considerations
Direct pin-compatible substitutes include DTA144EKA and DTC144WE (NPN equivalent). Verify resistor tolerance and hFE ranges match original design requirements before substitution.
