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DTA144ECA-TP Equivalent & Substitute Parts
Part Overview
The DTA144ECA-TP is a pre-biased PNP bipolar junction transistor (BJT) manufactured by Micro Commercial Co in SOT-23 surface mount packaging. This component operates at 50 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and 250 MHz transition frequency. The device is designed for general-purpose switching and amplification applications requiring integrated base bias resistors (47 kOhms each). The part is Active status and RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).
Equivalent and substitute parts are identified based on matching or compatible electrical characteristics including collector current rating, breakdown voltage, transition frequency, and integrated resistor values. Substitutes may vary in collector current capacity, base resistor configuration, and packaging format while maintaining functional compatibility within specified application parameters.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Transistor Type | PNP - Pre-Biased | — |
| Current - Collector (Ic) Max | 100 | mA |
| Voltage - Collector Emitter Breakdown (Max) | 50 | V |
| Resistor - Base (R1) | 47 | kOhms |
| Resistor - Emitter Base (R2) | 47 | kOhms |
| DC Current Gain (hFE) Min @ Ic, Vce | 68 @ 5mA, 5V | — |
| Vce Saturation (Max) @ Ib, Ic | 300mV @ 500µA, 10mA | — |
| Frequency - Transition | 250 | MHz |
| Power - Max | 200 | mW |
| Package / Case | TO-236-3, SC-59, SOT-23-3 | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the DTA144ECA-TP is determined by the following critical parameters:
Primary Matching Criteria:
- Transistor Type: PNP - Pre-Biased configuration
- Voltage - Collector Emitter Breakdown: 50 V minimum
- Frequency - Transition: 250 MHz or higher
- Power - Max: 200 mW or higher
- Mounting Type: Surface Mount
- Package / Case: TO-236-3, SC-59, SOT-23-3 compatible
Secondary Compatibility Factors:
- Current - Collector (Ic) Max: 100 mA or higher for direct substitution; lower ratings acceptable for current-limited applications
- Resistor - Base (R1) and Resistor - Emitter Base (R2): 47 kOhms for direct substitution; alternative values acceptable if application bias requirements are met
- DC Current Gain (hFE): 68 minimum at specified test conditions for direct substitution
- Vce Saturation: 300 mV maximum at specified conditions
Substitute parts are grouped by collector current capacity and integrated resistor values. Parts with identical electrical specifications and packaging are classified as direct equivalents. Parts with reduced collector current or modified resistor networks are classified as functional substitutes suitable for specific application requirements.
Parameter Comparison
| Part Number | Manufacturer | Ic Max (mA) | Vce Breakdown (V) | R1 (kOhms) | R2 (kOhms) | hFE Min @ Test | Frequency (MHz) | Package | Packaging Format |
|---|---|---|---|---|---|---|---|---|---|
| DTA144ECA-TP | Micro Commercial Co | 100 | 50 | 47 | 47 | 68 @ 5mA, 5V | 250 | SOT-23 | Tape & Reel (TR) |
| DDTA144ECA-7-F | Diodes Incorporated | 100 | 50 | 47 | 47 | 68 @ 5mA, 5V | 250 | SOT-23-3 | Tape & Reel (TR) |
| DTA144ECAT116 | Rohm Semiconductor | 100 | 50 | 47 | 47 | 68 @ 5mA, 5V | 250 | SOT-23-3 | Cut Tape (CT) & Digi-Reel® |
| DTA144EKAT146 | Rohm Semiconductor | 30 | 50 | 47 | 47 | 68 @ 5mA, 5V | 250 | SOT-23-3 | Cut Tape (CT) & Digi-Reel® |
| DTA143EKAT146 | Rohm Semiconductor | 100 | 50 | 4.7 | 4.7 | 30 @ 10mA, 5V | 250 | SOT-23-3 | Cut Tape (CT) & Digi-Reel® |
| DTA123EKAT146 | Rohm Semiconductor | 100 | 50 | 2.2 | 2.2 | 20 @ 20mA, 5V | 250 | SOT-23-3 | Cut Tape (CT) & Digi-Reel® |
| DTA124EKAT146 | Rohm Semiconductor | 30 | 50 | 22 | 22 | 56 @ 5mA, 5V | 250 | SOT-23-3 | Cut Tape (CT) & Digi-Reel® |
| DTA115EKAT146 | Rohm Semiconductor | 20 | 50 | 100 | 100 | 82 @ 5mA, 5V | 250 | SOT-23-3 | Cut Tape (CT) & Digi-Reel® |
| DTA114EKAT146 | Rohm Semiconductor | 50 | 50 | 10 | 10 | 30 @ 5mA, 5V | 250 | SOT-23-3 | Cut Tape (CT) & Digi-Reel® |
| DTB113EKT146 | Rohm Semiconductor | 500 | 50 | 1 | 1 | 33 @ 50mA, 5V | 200 | SOT-23-3 | Cut Tape (CT) & Digi-Reel® |
| DTB114EKT146 | Rohm Semiconductor | 500 | 50 | 10 | 10 | 56 @ 50mA, 5V | 200 | SOT-23-3 | Cut Tape (CT) & Digi-Reel® |
Engineering Selection Recommendations
Direct Equivalents (100% Functional Replacement):
DDTA144ECA-7-F (Diodes Incorporated) is a direct equivalent to DTA144ECA-TP. Both devices feature identical electrical specifications: 100 mA collector current, 50 V breakdown voltage, 47 kOhm integrated resistors, 68 minimum hFE at 5 mA/5 V, and 250 MHz transition frequency. Both are RoHS3 compliant with MSL 1 rating. The primary difference is packaging format (Tape & Reel) and supplier. This part is suitable for direct substitution in all applications.
DTA144ECAT116 (Rohm Semiconductor) provides equivalent electrical performance with identical specifications to the main part. This variant uses SST3 package designation and Cut Tape & Digi-Reel® packaging format. RoHS3 compliance and MSL 1 rating are maintained. Selection is appropriate where Rohm supply chain or packaging format is preferred.
Functional Substitutes (Application-Dependent):
DTA144EKAT146 (Rohm Semiconductor) maintains 47 kOhm resistor values and 68 hFE specification but reduces maximum collector current to 30 mA. This part is suitable for applications where collector current does not exceed 30 mA. RoHS3 and MSL 1 compliance are maintained.
DTA143EKAT146 (Rohm Semiconductor) supports full 100 mA collector current with 50 V breakdown voltage but features reduced base resistors (4.7 kOhms) and lower hFE (30 minimum at 10 mA/5 V). This part is suitable for applications requiring lower input impedance and higher base drive current. RoHS3 and MSL 1 compliance are maintained.
DTA123EKAT146 (Rohm Semiconductor) supports full 100 mA collector current with 50 V breakdown voltage but features minimal base resistors (2.2 kOhms) and lowest hFE (20 minimum at 20 mA/5 V). This part is suitable for high-speed switching applications requiring maximum base drive. RoHS3 and MSL 1 compliance are maintained.
DTA124EKAT146 (Rohm Semiconductor) reduces collector current to 30 mA with 22 kOhm resistors and 56 hFE at 5 mA/5 V. This part is suitable for moderate-current applications with intermediate bias requirements. RoHS3 and MSL 1 compliance are maintained.
DTA115EKAT146 (Rohm Semiconductor) reduces collector current to 20 mA with 100 kOhm resistors and 82 hFE at 5 mA/5 V. This part is suitable for low-current applications requiring high input impedance. RoHS3 and MSL 1 compliance are maintained.
DTA114EKAT146 (Rohm Semiconductor) supports 50 mA collector current with 10 kOhm resistors and 30 hFE at 5 mA/5 V. This part is suitable for moderate-current applications with lower input impedance. RoHS3 and MSL 1 compliance are maintained.
Higher Current Alternatives:
DTB113EKT146 and DTB114EKT146 (Rohm Semiconductor) support 500 mA collector current with 50 V breakdown voltage. DTB113EKT146 features 1 kOhm resistors and 33 hFE at 50 mA/5 V. DTB114EKT146 features 10 kOhm resistors and 56 hFE at 50 mA/5 V. Transition frequency is 200 MHz (reduced from 250 MHz). These parts are suitable for high-current applications where the DTA144ECA-TP current rating is insufficient. RoHS3 and MSL 1 compliance are maintained.
All substitute parts maintain Active product status, RoHS3 compliance, and MSL 1 (Unlimited) moisture sensitivity rating. Selection should be based on specific application requirements for collector current, input impedance (resistor values), and frequency response.
Frequently Asked Questions (FAQ)
Q: Can DDTA144ECA-7-F replace DTA144ECA-TP directly without circuit modification?
A: Yes. DDTA144ECA-7-F is a direct electrical equivalent with identical collector current (100 mA), breakdown voltage (50 V), integrated resistor values (47 kOhms), and transition frequency (250 MHz). Both devices are RoHS3 compliant with MSL 1 rating. The only difference is the manufacturer (Diodes Incorporated vs. Micro Commercial Co) and packaging format designation. No circuit modification is required.
Q: What is the difference between DTA144EKAT146 and DTA144ECA-TP?
A: DTA144EKAT146 reduces maximum collector current from 100 mA to 30 mA while maintaining all other electrical specifications including 50 V breakdown voltage, 47 kOhm resistors, 68 hFE, and 250 MHz transition frequency. This part is suitable for applications where collector current does not exceed 30 mA. Both parts use SOT-23-3 packaging and are RoHS3 compliant.
Q: When should I use DTA143EKAT146 instead of DTA144ECA-TP?
A: DTA143EKAT146 is selected when the application requires lower input impedance (4.7 kOhm resistors vs. 47 kOhms) and higher base drive current. This part maintains 100 mA collector current and 50 V breakdown voltage but features lower hFE (30 minimum at 10 mA/5 V vs. 68 at 5 mA/5 V). Use this part in applications requiring faster switching response or where base current availability is limited.
Q: Are DTB113EKT146 and DTB114EKT146 suitable replacements for DTA144ECA-TP?
A: DTB113EKT146 and DTB114EKT146 are not direct replacements due to significantly higher collector current rating (500 mA vs. 100 mA) and reduced transition frequency (200 MHz vs. 250 MHz). These parts are suitable only for applications requiring higher collector current capacity. Circuit redesign may be necessary to accommodate the different resistor values (1 kOhm or 10 kOhm vs. 47 kOhms) and lower frequency response.
Q: What is the significance of the integrated resistor values (R1 and R2)?
A: The integrated resistor values determine the input impedance and bias current characteristics of the pre-biased transistor. DTA144ECA-TP features 47 kOhm resistors, providing moderate input impedance suitable for general-purpose switching. Lower resistor values (2.2 kOhms, 4.7 kOhms, 10 kOhms) increase base drive current and reduce input impedance, suitable for high-speed switching. Higher resistor values (100 kOhms) reduce base current and increase input impedance, suitable for low-current applications. Selection depends on the specific bias and switching requirements of the application.
Q: Can I use DTA115EKAT146 in a circuit designed for DTA144ECA-TP?
A: DTA115EKAT146 is suitable only if the application collector current does not exceed 20 mA. This part features 100 kOhm resistors (vs. 47 kOhms) and higher hFE (82 at 5 mA/5 V), making it suitable for low-current, high-impedance applications. If the circuit requires 100 mA collector current capability, DTA115EKAT146 is not suitable without circuit modification.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All substitute parts listed are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance status of DTA144ECA-TP. All parts are suitable for applications requiring RoHS3 certification.
Q: What is the difference between SOT-23 and SOT-23-3 packaging designations?
A: SOT-23 and SOT-23-3 refer to the same physical package format (TO-236-3, SC-59). The designations are equivalent and interchangeable. Both support surface mount assembly on standard PCB equipment. The difference in designation reflects manufacturer nomenclature conventions and does not affect physical compatibility or electrical performance.
Q: Which substitute part should I select for a low-current application?
A: For low-current applications (20 mA or less), select DTA115EKAT146, which features 100 kOhm resistors and 82 hFE at 5 mA/5 V. This part provides high input impedance suitable for low-current bias circuits. For applications requiring 20-30 mA, select DTA124EKAT146 (22 kOhm resistors, 56 hFE) or DTA144EKAT146 (47 kOhm resistors, 68 hFE).
Q: What is the impact of transition frequency on part selection?
A: Transition frequency (fT) determines the maximum switching speed of the transistor. DTA144ECA-TP and most substitutes feature 250 MHz transition frequency, suitable for general-purpose switching applications up to several hundred megahertz. DTB113EKT146 and DTB114EKT146 feature 200 MHz transition frequency, which is adequate for most applications but may limit performance in high-frequency circuits. For applications requiring maximum switching speed, select parts with 250 MHz or higher transition frequency.
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