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NXP Semiconductors PDTA123TU,115
- Part No.:
- PDTA123TU,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
PDTA123TU,115.pdf
- Description:
- TRANS PREBIAS PNP 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:24,000
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Product details
Overview
PDTA123TU,115 from Nexperia is a PNP resistor-equipped transistor (RET) in SOT323 (SC-70) package, designed for digital switching applications with integrated 2.2 kΩ base bias resistor (R1), −50 V VCEO, −100 mA output current capability, and −150 mV VCEsat at IC = −10 mA / IB = −0.5 mA - used to control logic-level inputs and low-power loads in space-constrained consumer and industrial PCBs.
For engineers reviewing the PDTA123TU,115 datasheet, PDTA123TU,115 pinout, PDTA123TU,115 application, or PDTA123TU,115 equivalent, this part serves as a drop-in replacement for BC857-series transistors in digital interface circuits where reduced component count, simplified layout, and consistent DC biasing are required.
Technical Context
This RET integrates a single PNP bipolar junction transistor with an on-chip 2.2 kΩ base-to-emitter pull-up resistor (R1); R2 is open, confirming a single-resistor configuration optimized for direct microcontroller GPIO interfacing without external bias networks. It operates with open-base VCEO = −50 V and supports continuous IO up to −100 mA.
Thermal resistance Rth(j-a) is 625 K/W under standard FR4 mounting conditions, enabling reliable operation up to Tj = 150 °C. Its hFE ≥ 30 at VCE = −5 V and IC = −20 mA ensures stable saturation in digital switch mode across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V - maximum collector-emitter voltage before breakdown; enables use in 3.3 V/5 V logic rails with margin against transients |
| IO | −100 mA - continuous output current rating; sufficient for driving LEDs, small relays, or logic inputs |
| R1 | 2.2 kΩ (1.54–2.86 kΩ range) - fixed internal base bias resistor; eliminates need for external pull-up/pull-down components |
| VCEsat | −150 mV @ IC = −10 mA, IB = −0.5 mA - low saturation voltage minimizes power loss and heat generation in switching mode |
| hFE | ≥ 30 @ VCE = −5 V, IC = −20 mA - ensures robust turn-on with modest base drive, compatible with 3.3 V MCU outputs |
| Ptot | 200 mW @ Tamb ≤ 25 °C - thermal limit defined for SOT323 package; constrains duty cycle in high-current pulsed operation |
| Cc | 3 pF @ VCB = −10 V, f = 1 MHz - low collector capacitance supports fast digital switching with minimal signal delay |
Pinout & Package
SOT323 (SC-70) is a 3-lead surface-mount plastic package measuring 2.2 × 1.35 × 0.9 mm (L × W × H), optimized for high-density PCB layouts and reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | input (base) | Connected internally to R1; accepts TTL/CMOS logic-level signals directly without external biasing |
| 2 | GND (emitter) | Common reference node; tied to system ground; provides return path for base and collector currents |
| 3 | output (collector) | Switched output node; sinks current when active; connects to load (e.g., LED cathode, IC input pull-down) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias resistor | 2.2 kΩ ±29% - reduces bill-of-materials count by eliminating one external resistor per switch node |
| Low VCEsat | −150 mV - limits conduction loss to <1.5 mW at 10 mA, easing thermal management in compact designs |
| SOT323 footprint | 2.2 × 1.35 mm body - occupies ~35% less board area than SOT23, supporting miniaturized portable electronics |
| 100 mA output capability | Rated continuous sink current - supports direct driving of multiple logic inputs or low-power indicators without buffering |
| −50 V VCEO | Breakdown margin >10× typical supply rails - enhances reliability in noisy industrial environments with voltage spikes |
Applications
| LED Indicator Control | Microcontroller GPIO Interface |
|---|---|
Use Scenario: Driving status LEDs on embedded control panels with limited PCB real estate. IC Role / Device Role / Timing Role: PNP switch sinking current from LED anode to ground; activated by low-active MCU output. Use Value: Eliminates discrete base resistor, reducing component count and assembly cost while maintaining <200 mV dropout across full brightness range. |
Use Scenario: Level-shifting and inverting signals between 3.3 V microcontrollers and 5 V peripheral logic inputs. IC Role / Device Role / Timing Role: Digital inverter buffer with fixed gain; toggles peripheral enable lines based on MCU output state. Use Value: Ensures clean logic transitions with hFE ≥ 30 and <150 ns propagation delay, avoiding floating inputs on legacy ICs. |
| Load Switching in Wearables | Power Rail Enable Circuit |
Use Scenario: Enabling/disabling sensor modules in battery-powered wearables to extend runtime. IC Role / Device Role / Timing Role: Low-side enable switch controlling VCC to analog sensors; driven by sleep-mode-capable GPIO. Use Value: Draws <1 µA leakage (ICEO) in off-state, contributing <0.01% to total quiescent current in multi-sensor systems. |
Use Scenario: Sequencing power-up of auxiliary rails (e.g., RF section, display backlight) in handheld devices. IC Role / Device Role / Timing Role: Controlled rail enable switch; triggered by PMIC-controlled GPIO after primary rail stabilization. Use Value: Delivers precise −100 mA sink capability with <150 mV saturation drop, minimizing voltage droop during rail activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP digital switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PDTC123TU | PNP RET with identical R1 = 2.2 kΩ, same SOT323 package, but specified with tighter hFE min = 160 | Higher guaranteed current gain enables lower base drive requirements in marginal voltage scenarios | Select PDTC123TU when designing for worst-case 1.8 V GPIO drive or extended temperature operation beyond −40 °C |
| BC857B,215 | Standard PNP BJT (no built-in resistors); requires external 2.2 kΩ base resistor; same SOT323 package | Offers higher hFE (200–450) but increases component count and layout complexity | Choose BC857B,215 only when fine-tuned biasing or adjustable gain is required, and extra resistor placement is acceptable |
Compared with PDTC123TU and BC857B,215, PDTA123TU,115 delivers optimal balance of integration, thermal performance (625 K/W), and cost for fixed-gain digital switching - especially where board area and assembly yield are critical constraints.
Availability
PDTA123TU,115 is available at Aetrix Electronics and suitable for LED indicator control, microcontroller GPIO interfacing, wearable sensor load switching, and power rail enable circuits requiring stable component supply and long-term manufacturability.
Supply support for PDTA123TU,115 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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, serving automotive, industrial, computing, and consumer markets.
The PDTA123T series belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered specifically to replace traditional BJT + resistor combinations in digital interface and load-switching applications with higher reliability and lower assembly cost.
FAQ
What is the function of the internal resistor in PDTA123TU,115?
The internal 2.2 kΩ resistor (R1) connects between pin 1 (base) and pin 2 (emitter), providing automatic base biasing for PNP transistor operation. This allows direct connection to logic outputs without external components, ensuring predictable turn-on behavior with −0.5 mA base current at 3.3 V drive, and eliminates risk of incorrect biasing due to layout errors.
Can PDTA123TU,115 be used in linear amplifier applications?
No - PDTA123TU,115 is characterized and qualified exclusively for digital switching operation. Its hFE specification applies only at VCE = −5 V and IC = −20 mA in saturation, and no linearity, frequency response, or small-signal parameters (e.g., fT, rπ) are provided in the datasheet. Use dedicated general-purpose PNP transistors like BC857 for amplification.
Is reflow soldering mandatory for PDTA123TU,115?
Yes - the datasheet explicitly states "Reflow soldering is the only recommended soldering method" for SOT323 packages. Hand soldering risks thermal damage due to the device's low thermal mass and sensitivity to localized overheating; peak reflow temperature must not exceed 260 °C for ≤10 seconds per JEDEC J-STD-020.
How does PDTA123TU,115 differ from PDTA123TE in practical design?
PDTA123TU uses SOT323 (SC-70) packaging (2.2 × 1.35 mm), while PDTA123TE uses SOT416 (SC-75, 1.75 × 0.95 mm). Though both share identical electrical specs, the SOT323 offers better thermal dissipation (200 mW vs. 150 mW Ptot) and larger pad area for improved solder joint reliability - making PDTA123TU preferred for higher-current or thermally constrained designs.
PDTA123TU,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- -
PDTA123TU,115 FAQ
1.How can I place an order for PDTA123TU,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTA123TU,115 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 PDTA123TU,115 reliable?
The price and inventory of PDTA123TU,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTA123TU,115 is usually 5 days.
3.What payment methods are accepted for PDTA123TU,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTA123TU,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTA123TU,115?
PDTA123TU,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTA123TU,115 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 PDTA123TU,115?
For technical support, including PDTA123TU,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTA123TU,115 requirements.
6.How does Aetrix verify that PDTA123TU,115 is sourced from the original manufacturer or authorized distributors?
All PDTA123TU,115 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 PDTA123TU,115 meets industry standards.
7.What is the process for return or replacement of PDTA123TU,115?
All PDTA123TU,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTA123TU,115, 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 PDTA123TU,115 part is unused and in its original packaging.
Return procedure for PDTA123TU,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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