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DTA144EUA-TP Equivalent & Substitute Parts
Part Overview
The DTA144EUA-TP is a pre-biased PNP bipolar junction transistor manufactured by Micro Commercial Co, designed for surface mount applications in the SOT-323 package. 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 actively produced and RoHS3 compliant with unlimited moisture sensitivity rating.
Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within specified parameter tolerances.
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 | 300 | mV @ 500µA, 10mA |
| Current - Collector Cutoff (Max) | 500 | nA |
| Frequency - Transition | 250 | MHz |
| Power - Max | 200 | mW |
| Package / Case | SC-70, SOT-323 | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the DTA144EUA-TP are classified based on the following electrical and mechanical criteria:
Primary Substitution Criteria:
- Transistor Type: PNP - Pre-Biased
- Voltage - Collector Emitter Breakdown: 50 V (maximum)
- Current - Collector: 100 mA (maximum)
- Frequency - Transition: 250 MHz
- Power - Max: 200 mW
- Package / Case: SC-70, SOT-323
- Mounting Type: Surface Mount
- RoHS3 Compliance
Substitution Categories:
Category 1: Direct Electrical Equivalents Parts with identical or equivalent base resistor values (R1 = R2 = 47 kOhms), matching all primary electrical specifications, and SOT-323 package compatibility.
Category 2: Functional Equivalents with Different Base Resistor Values Parts with 100 mA collector current capability, 50 V breakdown voltage, and SOT-323 package, but with different internal base resistor configurations. These parts maintain electrical performance within the specified parameter range but differ in biasing characteristics.
Category 3: Current-Limited Equivalents Parts with reduced maximum collector current (20 mA to 50 mA) but matching voltage, frequency, and package specifications. These parts are suitable for applications with lower current requirements.
Parameter Comparison
| Part Number | Manufacturer | Ic Max (mA) | Vce Breakdown (V) | R1 (kOhms) | R2 (kOhms) | hFE Min @ 5mA, 5V | Vce Sat Max (mV) | Frequency (MHz) | Package | Supplier Package | RoHS3 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DTA144EUA-TP | Micro Commercial Co | 100 | 50 | 47 | 47 | 68 | 300 | 250 | SC-70, SOT-323 | SOT-323 | Yes |
| DDTA144EUA-7-F | Diodes Incorporated | 100 | 50 | 47 | 47 | 68 | 300 | 250 | SC-70, SOT-323 | SOT-323 | Yes |
| DTA114EUAT106 | Rohm Semiconductor | 50 | 50 | 10 | 10 | 30 | 300 | 250 | SC-70, SOT-323 | UMT3 | Yes |
| DTA115EUAT106 | Rohm Semiconductor | 20 | 50 | 100 | 100 | 82 | 300 | 250 | SC-70, SOT-323 | UMT3 | Yes |
| DTA123EUAT106 | Rohm Semiconductor | 100 | 50 | 2.2 | 2.2 | 20 | 300 | 250 | SC-70, SOT-323 | UMT3 | Yes |
| DTA124EUAT106 | Rohm Semiconductor | 30 | 50 | 22 | 22 | 56 | 300 | 250 | SC-70, SOT-323 | UMT3 | Yes |
| DTA143EUAT106 | Rohm Semiconductor | 100 | 50 | 4.7 | 4.7 | 30 | 300 | 250 | SC-70, SOT-323 | UMT3 | Yes |
| PDTA144EU,135 | Nexperia USA Inc. | 100 | 50 | 47 | 47 | 80 | 150 | — | SC-70, SOT-323 | SOT-323 | Yes |
| PDTA144EU,115 | NXP USA Inc. | 100 | 50 | 47 | 47 | 80 | 150 | — | SC-70, SOT-323 | SOT-323 | — |
Engineering Selection Recommendations
Direct Substitution (Identical Electrical Performance):
The DDTA144EUA-7-F from Diodes Incorporated is a direct substitute for the DTA144EUA-TP. Both parts share identical electrical specifications including 100 mA collector current, 47 kOhm base resistors, 68 minimum hFE at 5 mA/5 V, and 300 mV saturation voltage. Both are RoHS3 compliant with SOT-323 packaging. This substitution requires no circuit modifications.
The PDTA144EU,135 from Nexperia USA Inc. is functionally equivalent with matching 100 mA collector current, 47 kOhm base resistors, and SOT-323 package. This part exhibits improved saturation voltage performance (150 mV versus 300 mV) and higher minimum hFE (80 versus 68), making it suitable for applications requiring lower saturation losses. RoHS3 compliance is confirmed.
Functional Substitution (Reduced Current Capability):
The DTA114EUAT106 from Rohm Semiconductor operates at 50 mA maximum collector current with 10 kOhm base resistors. This part is suitable for applications with lower current requirements while maintaining 50 V breakdown voltage and 250 MHz transition frequency. The lower base resistor value results in reduced hFE (30 minimum) compared to the DTA144EUA-TP.
The DTA124EUAT106 from Rohm Semiconductor provides 30 mA collector current with 22 kOhm base resistors and hFE of 56 minimum at 5 mA/5 V. This configuration offers intermediate current capability between the DTA114EUAT106 and full 100 mA devices.
The DTA115EUAT106 from Rohm Semiconductor is rated for 20 mA maximum collector current with 100 kOhm base resistors, resulting in higher hFE (82 minimum). This part is appropriate for low-current signal switching applications.
Functional Substitution (Different Base Resistor Configuration):
The DTA143EUAT106 from Rohm Semiconductor maintains 100 mA collector current and 50 V breakdown voltage but incorporates 4.7 kOhm base resistors, resulting in lower hFE (30 minimum at 10 mA/5 V). This configuration provides faster switching response suitable for high-frequency applications.
The DTA123EUAT106 from Rohm Semiconductor provides 100 mA collector current with 2.2 kOhm base resistors, delivering the lowest hFE (20 minimum) among 100 mA options. This configuration is optimized for applications requiring minimal base current and rapid switching transitions.
All recommended substitutes maintain RoHS3 compliance and SOT-323 package compatibility with the DTA144EUA-TP.
Frequently Asked Questions (FAQ)
Q: Can the DDTA144EUA-7-F replace the DTA144EUA-TP without circuit modifications?
A: Yes. The DDTA144EUA-7-F is electrically identical to the DTA144EUA-TP with matching collector current (100 mA), base resistor values (47 kOhm), hFE characteristics (68 minimum), and saturation voltage (300 mV). Both use SOT-323 packaging. No circuit changes are required.
Q: What is the difference between the DTA144EUA-TP and PDTA144EU,135?
A: Both parts share identical collector current (100 mA), voltage rating (50 V), and base resistor configuration (47 kOhm). The PDTA144EU,135 exhibits superior saturation voltage performance (150 mV versus 300 mV) and higher minimum hFE (80 versus 68). The PDTA144EU,135 is suitable for applications where lower saturation losses improve efficiency.
Q: When should I use DTA114EUAT106 instead of DTA144EUA-TP?
A: The DTA114EUAT106 is appropriate when application current requirements do not exceed 50 mA. This part features 10 kOhm base resistors and lower hFE (30 minimum), making it suitable for reduced-power signal switching applications. The 50 V breakdown voltage and 250 MHz transition frequency remain equivalent to the DTA144EUA-TP.
Q: Are all substitute parts RoHS3 compliant?
A: All substitute parts listed in this document are RoHS3 compliant except PDTA144EU,115, for which RoHS3 status is not specified in the provided data.
Q: What is the significance of base resistor values (R1 and R2) in pre-biased transistor selection?
A: Base resistor values determine the biasing characteristics and switching speed of pre-biased transistors. Lower resistor values (2.2 kOhm to 10 kOhm) reduce hFE and enable faster switching. Higher resistor values (47 kOhm to 100 kOhm) increase hFE and provide stronger biasing. Selection depends on application switching frequency and current requirements.
Q: Can I use DTA123EUAT106 in place of DTA144EUA-TP?
A: The DTA123EUAT106 maintains 100 mA collector current and 50 V breakdown voltage but incorporates 2.2 kOhm base resistors, resulting in significantly lower hFE (20 minimum versus 68 minimum). This substitution is valid only if the application circuit accommodates the lower hFE and faster switching characteristics. Circuit verification is necessary to confirm compatibility.
Q: What packaging formats are available for these pre-biased transistors?
A: All listed parts use SOT-323 (SC-70) surface mount packaging. Supplier device packages vary: Micro Commercial Co and Diodes Incorporated use SOT-323 designation, while Rohm Semiconductor uses UMT3 designation. These are equivalent package formats. Nexperia and NXP parts use SOT-323 designation. Packaging format differences do not affect electrical performance or PCB layout compatibility.
Q: Is the DTA115EUAT106 suitable for high-current applications?
A: No. The DTA115EUAT106 is rated for 20 mA maximum collector current, making it unsuitable for applications requiring 100 mA. This part is optimized for low-current signal switching with 100 kOhm base resistors and high hFE (82 minimum). For 100 mA applications, use DTA144EUA-TP, DDTA144EUA-7-F, PDTA144EU,135, DTA123EUAT106, or DTA143EUAT106.
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