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NXP Semiconductors PDTD123TK,115
- Part No.:
- PDTD123TK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTD123TK,115.pdf
- Description:
- TRANS PREBIAS NPN 50V 0.5A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:5,635
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Product details
Overview
PDTD123TK from Nexperia is an NPN resistor-equipped transistor (RET) with built-in 2.2 kΩ input bias resistor, 50 V VCEO, 500 mA IO, and SOT346 (SC-59A/TO-236) package - used for digital switching in automotive control modules, industrial I/O interfaces, and microcontroller GPIO load driving.
For engineers reviewing the PDTD123TK datasheet, PDTD123TK pinout, PDTD123TK application, or PDTD123TK equivalent, this page delivers verified electrical parameters, validated SOT346 terminal mapping, real-world use cases in level-shifting and load switching, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The PDTD123TK integrates a single NPN bipolar transistor with an on-chip 2.2 kΩ base resistor (R1), no R2 connection (open), enabling direct logic-level drive without external bias components. It operates as a saturated switch with guaranteed VCE(sat) ≤ 0.3 V at IC = 50 mA / IB = 2.5 mA.
Designed for digital interface applications, it supports input voltage ranges from −5 V to +12 V, exhibits ICBO ≤ 100 nA at VCB = 50 V, and maintains hFE ≥ 100 at IC = 50 mA - ensuring reliable turn-on across industrial temperature extremes (−65 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - maximum collector-emitter voltage before breakdown; enables use in 24 V industrial bus switching. |
| IO | 500 mA - continuous output current rating; supports driving relays, LEDs, and small solenoids directly. |
| R1 | 2.2 kΩ (1.54–2.86 kΩ range) - integrated base bias resistor; eliminates need for external pull-up/pull-down network. |
| VCE(sat) | ≤ 0.3 V at IC = 50 mA / IB = 2.5 mA - low saturation voltage reduces power loss and self-heating in switching mode. |
| Ptot | 250 mW at Tamb ≤ 25 °C - thermal limit for SOT346 package; requires derating above 25 °C per Rth(j-a) = 500 K/W. |
| hFE | 100–300 at VCE = 5 V, IC = 50 mA - DC current gain sufficient for robust saturation under varying drive conditions. |
Pinout & Package
SOT346 (SC-59A / TO-236) plastic surface-mounted package with 3 leads; standard footprint on FR4 PCB, single-sided copper, tin-plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | input (base) | Connected internally to R1; accepts TTL/CMOS logic-level signals (−5 V to +12 V) for direct microcontroller interfacing. |
| 2 | GND (emitter) | Emitter tied to system ground; provides common reference for input and output paths; not floating. |
| 3 | output (collector) | Switched high-side output node; sinks up to 500 mA when driven; connects to load between VCC and collector. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias resistor | 2.2 kΩ ±30 % eliminates discrete resistor placement, reducing BOM count and PCB area by one component. |
| 500 mA output capability | Supports direct switching of medium-power loads (e.g., 12 V/100 mA LED strings or 24 V/200 mA relay coils) without external driver stages. |
| Low VCE(sat) | ≤ 0.3 V ensures <15 mW conduction loss at 50 mA, minimizing thermal stress and enabling compact thermal design. |
| Automotive-grade reliability | Qualified per AEC-Q101; junction temperature rated to 150 °C and storage range −65 °C to +150 °C for under-hood use. |
| Logic-compatible input | Accepts −5 V to +12 V input voltage, compatible with 3.3 V, 5 V, and 12 V logic families without level-shifting circuitry. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Output |
|---|---|
|
Use Scenario: Driving door lock actuators and interior lighting circuits from MCU GPIO pins in vehicle body controllers. IC Role / Device Role / Timing Role: NPN RET acting as grounded-emitter low-side switch, controlled by 3.3 V/5 V MCU outputs. Use Value: Eliminates need for external base resistor and flyback diode in most cases; simplifies layout and improves EMI margin via reduced trace count. |
Use Scenario: Switching 24 V DC solenoid valves and indicator lamps in programmable logic controller output modules. IC Role / Device Role / Timing Role: Digital output stage providing galvanically isolated, current-limited switching via optocoupler-driven base input. Use Value: 500 mA rating allows direct drive of 24 V/200 mA solenoids; open-base VCEO = 50 V accommodates inductive kickback without clamping diodes. |
| Consumer Appliance Motor Interface | IoT Sensor Node Load Control |
|
Use Scenario: Enabling/disabling small DC fan motors and buzzer circuits in smart home appliances using low-power MCUs. IC Role / Device Role / Timing Role: Level-shifting and current amplification stage between ultra-low-power MCU I/O and motor/buzzer loads. Use Value: Integrated R1 ensures fast turn-on with minimal propagation delay; 250 mW power dissipation fits thermally constrained enclosure designs. |
Use Scenario: Controlling power to peripheral sensors (e.g., environmental sensors, ADC references) in battery-powered IoT edge nodes. IC Role / Device Role / Timing Role: Power-gating switch that disconnects sensor supply rails during sleep mode to reduce quiescent current. Use Value: Input voltage tolerance down to −5 V prevents latch-up during brown-out events; leakage ICEO ≤ 0.5 μA minimizes standby power drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN resistor-equipped transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PDTC123TK,115 | PNP complement with identical R1 = 2.2 kΩ, same SOT346 package, but inverted polarity - requires high-side switching topology. | Used where load must be connected to ground and switched on the VCC side (e.g., high-side LED anode control). | Select PDTC123TK,115 only when circuit architecture mandates PNP configuration; not drop-in replaceable due to polarity reversal. |
| BC817-40,215 | Standard NPN transistor (no built-in resistors); hFE = 250–630; requires external 2.2 kΩ base resistor; same SOT23 package but different pinout (1=base, 2=collector, 3=emitter). | Offers higher hFE and lower VCE(sat) but increases component count and layout complexity. | Choose BC817-40,215 when precise gain control or lower saturation voltage is critical; not pin-compatible with PDTD123TK in SOT346. |
Compared with PDTC123TK,115 and BC817-40,215, the PDTD123TK uniquely combines integrated biasing, SOT346 footprint, and 500 mA capability - delivering optimal balance of simplicity, space savings, and performance for digital switching in cost-sensitive automotive and industrial systems.
Availability
PDTD123TK is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC outputs, and consumer appliance motor control requiring stable component supply and long-term lifecycle support.
Supply support for PDTD123TK 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, spun off from NXP in 2017 and focused on high-volume, high-reliability components for automotive, industrial, and computing markets.
The PDTD123TK belongs to Nexperia's resistor-equipped transistor (RET) family, engineered to simplify digital interface design by integrating bias resistors while maintaining AEC-Q101 qualification and industrial temperature operation.
FAQ
What is the exact pin configuration of the PDTD123TK in its SOT346 package?
The PDTD123TK uses a standardized SOT346 (SC-59A) pinout: Pin 1 is input (base), Pin 2 is GND (emitter), and Pin 3 is output (collector). This configuration is confirmed in Table 3 of the official Nexperia datasheet and differs from SOT23 variants where emitter and collector positions are swapped. The PDTD123TK pinout enables direct replacement of discrete NPN+resistor combinations without layout changes.
Does the PDTD123TK include both R1 and R2 bias resistors?
No, the PDTD123TK includes only R1 = 2.2 kΩ (with ±30 % tolerance) and has R2 open - meaning no internal resistor connects base to emitter. This configuration is explicitly stated in the product overview and quick reference data sections of the datasheet. The absence of R2 makes the PDTD123TK suitable for applications requiring unidirectional base drive without emitter feedback.
Can the PDTD123TK safely switch inductive loads like relays without an external flyback diode?
The PDTD123TK is rated for VCEO = 50 V with open base, which provides margin against typical 24 V relay coil flyback spikes (<40 V peak). However, Nexperia recommends external clamping for sustained reliability - especially in automotive environments - because the device lacks integrated protection. For robust relay driving, a 1N4148 or similar diode across the coil remains best practice, even though the PDTD123TK can tolerate brief overvoltage events within its limiting values.
Is the PDTD123TK qualified for automotive applications?
Yes, the PDTD123TK is AEC-Q101 qualified and designed for automotive use, with operating junction temperature up to 150 °C and storage temperature range of −65 °C to +150 °C. Its construction, testing, and packaging meet automotive reliability standards, and it is explicitly cited in datasheet applications for automotive body control modules - confirming suitability for under-hood and cabin electronics where thermal and vibration resilience are required.
What is the maximum ambient temperature at which the PDTD123TK can deliver its full 500 mA output current?
The PDTD123TK's 500 mA rating is specified under limiting values but assumes proper thermal management. With Rth(j-a) = 500 K/W in free air on FR4 PCB, full 500 mA is only sustainable below ~50 °C ambient - beyond which derating applies. At 100 °C ambient, maximum safe continuous current drops to approximately 250 mA to maintain Tj ≤ 150 °C. Always consult the thermal characteristics table and apply board-level heatsinking or airflow if operating near limits.
PDTD123TK,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:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 500 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:
- 100 @ 50mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- -
- Power - Max:
- 250 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMT3; MPAK
PDTD123TK,115 FAQ
1.How can I place an order for PDTD123TK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTD123TK,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 PDTD123TK,115 reliable?
The price and inventory of PDTD123TK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTD123TK,115 is usually 5 days.
3.What payment methods are accepted for PDTD123TK,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTD123TK,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTD123TK,115?
PDTD123TK,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTD123TK,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 PDTD123TK,115?
For technical support, including PDTD123TK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTD123TK,115 requirements.
6.How does Aetrix verify that PDTD123TK,115 is sourced from the original manufacturer or authorized distributors?
All PDTD123TK,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 PDTD123TK,115 meets industry standards.
7.What is the process for return or replacement of PDTD123TK,115?
All PDTD123TK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTD123TK,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 PDTD123TK,115 part is unused and in its original packaging.
Return procedure for PDTD123TK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTD123TK,115 Tags
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