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NXP Semiconductors PDTA123TK,115
- Part No.:
- PDTA123TK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTA123TK,115.pdf
- Description:
- TRANS PREBIAS PNP 50V 0.1A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:5,162
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Product details
Overview
PDTA123TK,115 from Nexperia is a PNP resistor-equipped transistor (RET) with integrated 2.2 kΩ input bias resistor and open R2 configuration, designed for digital switching applications where simplified base drive and reduced component count are critical; it delivers −100 mA output current, −50 V collector-emitter voltage rating, and −150 mV saturation voltage at IC = −10 mA/IB = −0.5 mA.
For engineers reviewing the PDTA123TK,115 datasheet, PDTA123TK,115 pinout, PDTA123TK,115 application, or PDTA123TK,115 equivalent, this device serves as a cost-optimized, surface-mount alternative to discrete PNP + resistor combinations in load switching, microcontroller I/O interfacing, and level translation circuits requiring stable DC gain and low saturation loss.
Technical Context
The PDTA123TK,115 integrates a single PNP bipolar junction transistor with one monolithically embedded 2.2 kΩ base resistor (R1), while R2 remains unconnected - enabling direct logic-level drive without external biasing components. Its operation relies on standard BJT saturation principles under fixed-current forced β conditions.
Designed for digital switching rather than linear amplification, it exhibits guaranteed hFE ≥30 at IC = −20 mA/VCE = −5 V and maintains consistent VCEsat across temperature (−40 °C to +100 °C), with thermal resistance Rth(j-a) of 500 K/W on FR4 PCB - confirming suitability for moderate-duty, space-constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V: Maximum safe collector-emitter voltage with base open; defines off-state blocking capability in high-side switch configurations. |
| IO | −100 mA: Continuous DC output current rating; supports driving small relays, LEDs, or logic inputs without derating at 25 °C ambient. |
| R1 | 2.2 kΩ (1.54–2.86 kΩ): Integrated base bias resistor enables direct connection to 3.3 V or 5 V logic outputs without external components. |
| VCEsat | −150 mV max at IC = −10 mA/IB = −0.5 mA: Ensures minimal power loss and heat generation during saturated conduction. |
| Ptot | 250 mW at Tamb ≤25 °C: Total power dissipation limit in SOT346 package; sets practical current/voltage operating envelope for continuous use. |
| hFE | ≥30 at VCE = −5 V, IC = −20 mA: Minimum DC current gain ensures reliable saturation with standard logic drive strength. |
Pinout & Package
SOT346 (SC-59A / TO-236) plastic surface-mounted package with 3 leads; 3.0 mm × 1.7 mm × 1.3 mm body size; standard footprint compatible with reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | input (base) | Connected internally to R1; accepts logic-level voltage to initiate conduction - no external pull-up/down required. |
| 2 | GND (emitter) | Common reference node; ties to system ground when used in low-side switch or level translator configurations. |
| 3 | output (collector) | Switched output terminal; sinks current from load connected between VCC and collector in high-side or low-side topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias resistor | Eliminates need for external base resistor, reducing BOM count and PCB area in digital interface designs. |
| −100 mA output current capability | Supports direct driving of medium-current loads such as indicator LEDs, small solenoids, or CMOS/TTL inputs without buffer stages. |
| Low −150 mV VCEsat | Minimizes conduction loss and self-heating, improving efficiency and reliability in battery-powered or thermally constrained systems. |
| SC-59A (SOT346) package | Standardized 3-pin SMD outline with proven manufacturability and compatibility with automated pick-and-place and reflow processes. |
Applications
| LED Driver Circuit | Microcontroller I/O Interface |
|---|---|
Use Scenario: Driving multiple status LEDs from 3.3 V or 5 V MCU GPIO pins with current limiting handled internally. IC Role / Device Role / Timing Role: Low-side switch sinking LED current through collector to ground, controlled by logic-high base input. Use Value: Eliminates discrete base resistors per LED channel, cutting BOM cost and layout complexity while maintaining predictable turn-on behavior. | Use Scenario: Level-shifting and signal inversion between mixed-voltage subsystems (e.g., 3.3 V MCU controlling 5 V peripheral enable lines). IC Role / Device Role / Timing Role: Inverting digital buffer with defined saturation characteristics and fast switching response. Use Value: Provides clean logic inversion with <1 µs propagation delay and guaranteed noise margin due to built-in resistor tolerance control. |
| Relay Coil Driver | Power Rail Enable Switch |
Use Scenario: Activating 5 V or 12 V electromagnetic relays using microcontroller outputs incapable of sourcing sufficient current. IC Role / Device Role / Timing Role: High-current PNP switch placed between relay coil and VCC, turned on by grounded base signal. Use Value: Delivers −100 mA peak current with low VCEsat, minimizing coil heating and ensuring robust relay actuation even at elevated temperatures. | Use Scenario: Enabling/disabling auxiliary power rails (e.g., sensor supply, RF module VDD) under firmware control in portable devices. IC Role / Device Role / Timing Role: High-side switch controlling rail voltage delivery via emitter-follower or common-emitter configuration. Use Value: Enables precise power sequencing and fault-isolation with no shoot-through risk, leveraging built-in resistor for stable gate/base drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP resistor-equipped transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PDTC123TK | NPN complement with identical R1 = 2.2 kΩ, same SOT346 package and marking code GA. | Used where active-low input drives a load referenced to ground instead of VCC. | Select PDTC123TK when circuit topology requires NPN sink switching rather than PNP source switching. |
| BC857B,215 | Discrete PNP transistor without integrated resistors; requires external base resistor network for biasing. | Offers higher hFE (min 200) but increases component count and layout sensitivity to stray capacitance. | Choose BC857B,215 only when precise analog gain control or higher-frequency AC performance is needed beyond digital switching scope. |
Compared with PDTC123TK and BC857B,215, the PDTA123TK,115 uniquely combines PNP polarity, integrated biasing, and SOT346 packaging - delivering lowest assembly cost and highest design simplicity for fixed-ratio digital load switching without compromising saturation performance or thermal margin.
Availability
PDTA123TK,115 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller I/O interfaces, relay coil drivers, and power rail enable switches requiring stable component supply and long-term production continuity.
Supply support for PDTA123TK,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, consumer, and wearable markets.
The PDTA123TK,115 belongs to Nexperia's PNP Resistor-Equipped Transistor (RET) family, engineered specifically to replace discrete transistor-resistor combinations in cost-sensitive, high-volume digital switching applications.
FAQ
What is the function of the internal resistor in PDTA123TK,115?
The PDTA123TK,115 integrates a single 2.2 kΩ resistor (R1) between the base and input pin, eliminating the need for an external base resistor when driven by standard logic outputs. This resistor establishes a defined base current path, enabling predictable saturation behavior and simplifying circuit design - a core feature confirmed in the official datasheet's Quick Reference Data and Pinning sections.
Is PDTA123TK,115 pin-compatible with BC857 series transistors?
No, PDTA123TK,115 is not pin-compatible with BC857 series transistors. While both are PNP devices in SOT346 packages, the PDTA123TK,115 has a 3-pin configuration with pin 1 = base/input, pin 2 = emitter/GND, pin 3 = collector/output, whereas BC857 variants follow standard B-C-E pinout (pin 1 = emitter, pin 2 = base, pin 3 = collector). PCB layout changes are required for substitution.
What is the maximum ambient temperature for continuous operation of PDTA123TK,115?
The PDTA123TK,115 supports continuous operation up to +150 °C ambient temperature, as specified in Table 6 (Limiting Values) of its datasheet. However, its usable current rating decreases above +25 °C due to thermal derating - at +85 °C ambient, maximum continuous output current drops to approximately −60 mA to maintain junction temperature ≤150 °C.
Does PDTA123TK,115 include an emitter resistor (R2)?
No, PDTA123TK,115 does not include an emitter resistor. The datasheet explicitly states "R1 = 2.2 kΩ, R2 = open" across all product overview and characteristics sections. This configuration makes it suitable for applications requiring simple base-driven switching without emitter feedback or current sensing.
What marking code identifies PDTA123TK,115 on the device body?
The PDTA123TK,115 is marked with the code "GA" on its package surface, as documented in Table 5 (Marking codes) of the official datasheet. This two-character laser marking is consistent across all production lots and serves as the primary visual identifier for quality inspection and traceability.
PDTA123TK,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 30 @ 20mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- -
- Power - Max:
- 250 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMT3; MPAK
PDTA123TK,115 FAQ
1.How can I place an order for PDTA123TK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTA123TK,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 PDTA123TK,115 reliable?
The price and inventory of PDTA123TK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTA123TK,115 is usually 5 days.
3.What payment methods are accepted for PDTA123TK,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTA123TK,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTA123TK,115?
PDTA123TK,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTA123TK,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 PDTA123TK,115?
For technical support, including PDTA123TK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTA123TK,115 requirements.
6.How does Aetrix verify that PDTA123TK,115 is sourced from the original manufacturer or authorized distributors?
All PDTA123TK,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 PDTA123TK,115 meets industry standards.
7.What is the process for return or replacement of PDTA123TK,115?
All PDTA123TK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTA123TK,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 PDTA123TK,115 part is unused and in its original packaging.
Return procedure for PDTA123TK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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