My Inquiry
My Account
Diodes Incorporated DDTA125TUA-7
- Part No.:
- DDTA125TUA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTA125TUA-7.pdf
- Description:
- TRANS PREBIAS PNP 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,926
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DDTA125TUA-7 from Diodes Incorporated is a PNP pre-biased transistor with single built-in bias resistor (R1 = 200 kΩ), housed in SOT323 package, rated for VCEO = –50 V, IC(max) = –100 mA, and hFE = 100–600 at IC = –1 mA, used in discrete logic-level switching and signal inversion circuits.
For engineers reviewing the DDTA125TUA-7 datasheet, DDTA125TUA-7 pinout, DDTA125TUA-7 application, or DDTA125TUA-7 equivalent, key selection criteria include verified R1 tolerance (±30%), VCE(sat) ≤ –0.3 V at IC/IB = –0.5 mA/–0.05 mA, thermal resistance of 625 °C/W, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
This device implements a monolithic PNP bipolar junction transistor with an integrated 200 kΩ base-emitter pull-up resistor (R1 only), eliminating external bias components in low-current digital interface and level-shifting applications. Its epitaxial planar construction ensures stable hFE across temperature and consistent VCE(sat) performance under defined drive conditions.
The SOT323 package supports surface-mount assembly on FR4 PCBs with minimum pad layout, delivering 200 mW power dissipation capability and 625 °C/W junction-to-ambient thermal resistance. It operates across –55 °C to +150 °C, meeting industrial and automotive ambient requirements without derating below 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | –50 V: Maximum allowable collector-emitter voltage before breakdown; defines safe operating range in high-side switch configurations. |
| IC(max) | –100 mA: Continuous DC collector current limit; sets upper bound for load-driving capability in active-low output stages. |
| R1 | 200 kΩ ±30%: Integrated base bias resistor value; determines input current sensitivity and enables direct microcontroller GPIO interfacing. |
| hFE | 100–600 @ IC = –1 mA, VCE = –5 V: DC current gain range; ensures predictable saturation behavior under typical logic-driven conditions. |
| VCE(sat) | ≤ –0.3 V @ IC/IB = –0.5 mA/–0.05 mA: Saturation voltage at specified drive ratio; guarantees low conduction loss in on-state switching. |
| PD | 200 mW: Maximum power dissipation on FR4 board; constrains thermal design for continuous operation without heatsinking. |
Pinout & Package
Package: SOT323 - ultra-small surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), moisture sensitivity level 1, matte tin-plated leads, weight ≈ 0.006 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Connected to higher potential rail in PNP configuration; serves as current source output node. |
| 2 (Base) | Base terminal | Internally connected to R1; accepts logic-level input to control transistor conduction state. |
| 3 (Collector) | Collector terminal | Output node tied to load; sinks current when transistor is saturated and enabled. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias resistor | 200 kΩ ±30%, eliminates need for external base resistor in simple switching circuits. |
| Epitaxial planar die construction | Ensures repeatable hFE and VCE(sat) across production lots and temperature ranges. |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; no intentionally added lead, bromine & chlorine <1500 ppm total. |
| AEC-Q101 qualified option | Available in automotive-grade variant (PPAP-capable, IATF 16949 manufacturing); supports safety-critical vehicle subsystems. |
Applications
| LED Driver Circuit | Microcontroller GPIO Interface |
|---|---|
Use Scenario: Driving low-current indicator LEDs from 3.3 V or 5 V logic rails with minimal external components. IC Role / Device Role / Timing Role: PNP current sink switch enabling active-low LED activation with logic-compatible input threshold. Use Value: Eliminates discrete base resistor; achieves VCE(sat) ≤ –0.3 V at IC = –5 mA, minimizing LED forward voltage drop impact. | Use Scenario: Level translation between 1.8 V/3.3 V microcontroller outputs and 5 V peripheral enable inputs. IC Role / Device Role / Timing Role: Inverting buffer with fixed gain and predictable turn-on delay due to integrated R1. Use Value: Delivers hFE ≥ 100 at IC = –1 mA, ensuring reliable saturation with sub-10 µA GPIO sourcing capability. |
| Power Supply Enable Switch | Industrial Sensor Signal Conditioning |
Use Scenario: Enabling/disabling auxiliary 12 V supply rails using low-power MCU outputs. IC Role / Device Role / Timing Role: High-side switch controller with defined VCEO = –50 V rating for reverse-polarity protection margin. Use Value: Supports IC up to –100 mA while maintaining VCE(sat) ≤ –0.3 V, reducing power loss in always-on control paths. | Use Scenario: Converting open-collector sensor outputs (e.g., Hall effect, reed switch) to clean CMOS-compatible signals. IC Role / Device Role / Timing Role: Digital signal conditioner providing noise-immune, rail-to-rail output swing. Use Value: R1 tolerance (±30%) ensures consistent switching thresholds across temperature; operates reliably from –55 °C to +150 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTA125TCA-7-F | SOT-23 package; same R1 = 200 kΩ, identical electrical specs, but larger footprint and higher RθJA = 400 °C/W. | Preferred where board space allows and higher power handling (300 mW) is needed. | Select for legacy SOT-23 compatibility or higher thermal mass requirement. |
| NSV12501T1G | PNP pre-biased with R1 = 220 kΩ; hFE = 80–240; VCEO = –50 V; SOT-323 package; AEC-Q101 qualified. | Offers tighter hFE spread and certified automotive qualification out-of-box. | Choose when AEC-Q101 compliance is mandatory and ±30% R1 tolerance is acceptable. |
Compared with DDTA125TUA-7, DDTA125TCA-7-F trades compactness for improved thermal performance in SOT-23, while NSV12501T1G provides factory-certified automotive qualification and narrower hFE range-critical for deterministic timing in safety-relevant sensor interfaces.
Availability
DDTA125TUA-7 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interface designs, and power supply enable switches requiring stable component supply and long-term obsolescence management.
Supply support for DDTA125TUA-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This part belongs to the DDTA R1-Only Series of pre-biased transistors, designed specifically for simplifying digital interface and low-power switching applications by integrating critical biasing resistors directly into the die package.
FAQ
Is DDTA125TUA-7 still in active production?
No-DDTA125TUA-7-F is marked "Obsolete" in Diodes' official ordering information table. However, Aetrix Electronics maintains legacy inventory and offers cross-reference support, including verified alternatives like NSV12501T1G and DDTA125TCA-7-F with identical R1 and hFE specifications.
What is the function of the single internal resistor R1?
R1 is a 200 kΩ base-emitter pull-up resistor that biases the PNP transistor into cutoff when the base is left floating or driven low. It enables direct connection to logic outputs without external components, setting the input current required to saturate the device at approximately 0.05 mA for IC = 0.5 mA.
Can DDTA125TUA-7 be used in automotive applications?
Yes-while the standard DDTA125TUA-7-F is not AEC-Q101 qualified, Diodes offers automotive-grade variants (e.g., DDTA125TUAQ-7-F) manufactured in IATF 16949 facilities and PPAP-capable. These meet AEC-Q101 stress test requirements and are intended for engine control, body electronics, and ADAS subsystems.
How does thermal performance compare between SOT323 and SOT23 packages?
DDTA125TUA-7 in SOT323 has RθJA = 625 °C/W on FR4, limiting continuous power to 200 mW. In contrast, the SOT-23 variant (DDTA125TCA-7-F) achieves RθJA = 400 °C/W, supporting 300 mW dissipation-making it preferable for higher-current or thermally constrained environments despite its larger footprint.
DDTA125TUA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Resistor - Base (R1):
- -
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- Frequency - Transition:
- -
- Power - Max:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
DDTA125TUA-7 FAQ
1.How can I place an order for DDTA125TUA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA125TUA-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DDTA125TUA-7 reliable?
The price and inventory of DDTA125TUA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTA125TUA-7 is usually 5 days.
3.What payment methods are accepted for DDTA125TUA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA125TUA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA125TUA-7?
DDTA125TUA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA125TUA-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DDTA125TUA-7?
For technical support, including DDTA125TUA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA125TUA-7 requirements.
6.How does Aetrix verify that DDTA125TUA-7 is sourced from the original manufacturer or authorized distributors?
All DDTA125TUA-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DDTA125TUA-7 meets industry standards.
7.What is the process for return or replacement of DDTA125TUA-7?
All DDTA125TUA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTA125TUA-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DDTA125TUA-7 part is unused and in its original packaging.
Return procedure for DDTA125TUA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTA125TUA-7 Tags
-
MUN5211T1G
onsemi
-
DTC043ZEBTL
Rohm Semiconductor
-
DTC114EKAT146
Rohm Semiconductor
-
DDTD113ZC-7-F
Diodes Incorporated
-
DRDNB16W-7
Diodes Incorporated
-
PDTC114ET,215
Nexperia USA Inc.
-
PDTC143ZT,215
Nexperia USA Inc.
-
PDTC143ET,215
Nexperia USA Inc.
-
PDTC143XT,215
Nexperia USA Inc.
-
MMUN2211LT1G
onsemi
-
PDTC144ET,215
Nexperia USA Inc.
-
PDTC124ET,215
Nexperia USA Inc.
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
