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NXP Semiconductors PDTD123EK,115
- Part No.:
- PDTD123EK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTD123EK,115.pdf
- Description:
- TRANS PREBIAS NPN 50V 0.5A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:8,299
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Product details
Overview
PDTD123EK from Nexperia is a 500 mA, 50 V NPN resistor-equipped transistor (RET) with integrated bias resistors R1 = 2.2 kΩ and R2 = 2.2 kΩ, ±10 % resistor ratio tolerance, designed for digital switching in automotive and industrial control circuits where simplified base drive and reduced component count are critical.
For engineers reviewing the PDTD123EK datasheet, PDTD123EK pinout, PDTD123EK application, or PDTD123EK equivalent, this device serves as a cost-optimized, surface-mount alternative to discrete BJT + resistor combinations in load switching, IC input control, and low-power logic interfacing - with confirmed SOT346 package, 3-pin configuration, and validated DC current gain (hFE ≥ 40 at IC = 50 mA).
Technical Context
The PDTD123EK integrates two precision-matched on-die resistors (R1 and R2) to form a monolithic NPN transistor with built-in base bias network, eliminating external components required for saturation switching. Its fixed R2/R1 ratio of 0.9–1.1 ensures consistent turn-on/turn-off behavior across temperature and process variation.
Designed for direct interface with 3.3 V and 5 V logic families, it supports VI(on) = 1.0–2.0 V and VI(off) = 0.6–1.8 V, enabling reliable digital signal translation without level-shifting circuitry. The device operates up to 150 °C junction temperature and delivers VCE(sat) ≤ 0.3 V at IC = 50 mA / IB = 2.5 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V industrial control rails and 12 V automotive systems. |
| IO | 500 mA - Continuous DC output current capability; supports driving relays, LEDs, and small solenoids directly. |
| R1 | 2.2 kΩ (1.54–2.86 kΩ) - Input bias resistor value; sets base current for predictable saturation under standard logic drive conditions. |
| R2/R1 | 0.9–1.1 - Tight resistor ratio tolerance; ensures stable switching thresholds and minimizes variation in VI(on)/VI(off) across units. |
| VCE(sat) | ≤ 0.3 V at IC = 50 mA / IB = 2.5 mA - Low saturation voltage reduces power loss and thermal stress in high-duty-cycle switching. |
| hFE | ≥ 40 at VCE = 5 V, IC = 50 mA - Minimum DC current gain guarantees sufficient current amplification for reliable saturation with standard logic-level drive. |
| Ptot | 250 mW at Tamb ≤ 25 °C - Power dissipation limit on FR4 PCB; defines thermal derating envelope for continuous operation. |
Pinout & Package
Package: SOT346 (SC-59A / TO-236), 3-lead plastic surface-mount package with standard footprint and tin-plated leads.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (base) | Connected internally to R1; accepts logic-level input voltage (VI(on)/VI(off)) to control transistor conduction state. |
| 2 | GND (emitter) | Emitter terminal tied to system ground reference; forms common return path for load current and bias network. |
| 3 | Output (collector) | Switched high-side output node; connects to load (e.g., relay coil, LED anode) with current sourced from VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in bias resistors R1 and R2 | Eliminates need for two external resistors, reducing BOM count and PCB area by ~3 components per switch node. |
| ±10 % R2/R1 ratio tolerance | Ensures consistent VI(on) and VI(off) across production lots, improving batch-to-batch reliability in automated test and calibration. |
| 500 mA DC output current | Supports direct drive of medium-power loads (e.g., 24 V/200 mA relays) without external driver stages or heat sinking. |
| VCE(sat) ≤ 0.3 V at rated current | Minimizes conduction loss (< 15 mW at 50 mA), enabling higher efficiency and lower self-heating in compact layouts. |
| SOT346 package compatibility | Enables pick-and-place assembly with standard 0.95 mm pitch tooling; footprint matches industry-standard SC-59A land pattern. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Output |
|---|---|
Use Scenario: Switching 12 V indicator LEDs and small solenoid valves in door lock and lighting control units. IC Role / Device Role / Timing Role: NPN RET acting as logic-controlled load switch between battery rail and grounded load. Use Value: Reduces component count vs. discrete BJT + resistors; meets AEC-Q101 stress requirements via qualified Nexperia process. |
Use Scenario: Driving 24 V DC field devices (e.g., proximity sensors, pilot lights) from microcontroller GPIO pins. IC Role / Device Role / Timing Role: Level-translating digital output buffer with integrated base bias for robust 3.3 V/5 V MCU interface. Use Value: Eliminates external pull-up/pull-down networks; supports >100 k cycles per channel with guaranteed VCE(sat) stability. |
| Consumer Appliance Control Board | IoT Sensor Node Power Management |
Use Scenario: Enabling/disabling auxiliary power rails (e.g., display backlight, motor driver enable) in washing machine UI boards. IC Role / Device Role / Timing Role: Low-side switch controlling VCC delivery to subsystems based on MCU command signals. Use Value: Enables fast turn-on (ton < 100 ns typical) and low quiescent current (< 1 μA off-state leakage) for energy-efficient standby modes. |
Use Scenario: Managing power to BLE/Wi-Fi modules and environmental sensors during sleep/wake transitions in battery-powered nodes. IC Role / Device Role / Timing Role: Load switch isolating downstream circuitry from main supply to minimize system leakage current. Use Value: Achieves < 0.5 μA ICEO at VCE = 50 V, extending battery life in multi-year deployments without compromising wake latency. |
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 |
|---|---|---|---|
| PDTB123EK | PNP complement with identical R1/R2 values and SOT346 package; VCEO = −50 V, IO = −500 mA. | Used in high-side switching configurations where load connects to VCC and emitter ties to MCU GPIO. | Select when sourcing current from VCC is required instead of sinking to ground. |
| BC817-40,115 | Standard NPN BJT (no built-in resistors); hFE = 250–630; requires external base resistor network. | Offers higher gain and wider VCEO (45 V), but increases layout complexity and component count for digital switching. | Choose when precise gain control or higher voltage margin is needed, and board space allows for discrete biasing. |
Compared with PDTB123EK and BC817-40,115, the PDTD123EK provides optimized integration for ground-referenced digital switching - delivering lowest BOM count, fastest time-to-schematic completion, and guaranteed resistor matching - while maintaining full compatibility with existing SOT346 placement and reflow profiles.
Availability
PDTD123EK is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC outputs, and consumer appliance control requiring stable component supply, long-term lifecycle support, and AEC-Q101-aligned manufacturing consistency.
Supply support for PDTD123EK 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 applications in automotive, industrial, computing, and consumer markets.
The PDTD123EK belongs to Nexperia's resistor-equipped transistor (RET) family, engineered specifically to replace discrete BJT + resistor combinations in cost-sensitive, space-constrained digital switching applications across harsh-environment electronics.
FAQ
What is the maximum operating temperature for the PDTD123EK?
The PDTD123EK has a maximum junction temperature (Tj) of 150 °C and an ambient operating range of −65 °C to +150 °C. Its thermal resistance Rth(j-a) is 500 K/W on standard FR4 PCB, meaning it can sustain continuous 500 mA operation only with appropriate derating above 25 °C ambient. For sustained high-current use, thermal design must ensure Tj remains below 150 °C - verified using the PDTD123EK's published limiting values and thermal characteristics.
Does the PDTD123EK require an external base resistor?
No, the PDTD123EK does not require an external base resistor because it integrates R1 = 2.2 kΩ and R2 = 2.2 kΩ on-die. These built-in resistors configure the device as a ready-to-use digital switch that accepts direct connection to 3.3 V or 5 V logic outputs. Adding an external resistor would disrupt the calibrated VI(on)/VI(off) thresholds and may prevent proper saturation - the PDTD123EK is designed for resistor-free implementation in standard digital interface circuits.
Is the PDTD123EK pin-compatible with other SOT346 transistors?
The PDTD123EK uses the standard SOT346 (SC-59A) pinout: Pin 1 = input (base), Pin 2 = GND (emitter), Pin 3 = output (collector). While the physical package is compatible with other SOT346 devices, electrical functionality is not interchangeable - for example, BC817-40,115 shares the same footprint but lacks integrated resistors and requires external biasing. Always verify circuit role and electrical parameters before substitution; the PDTD123EK is not a drop-in replacement for generic SOT346 BJTs.
What is the marking code for the PDTD123EK?
The PDTD123EK is marked with the code "E3" on its package surface, as specified in Table 5 of the official Nexperia datasheet. This 2-character top-side marking is laser-etched or molded into the plastic body and is used for traceability and visual identification during assembly and inspection. The "E3" code uniquely identifies the PDTD123EK variant within the broader PDTD123E series and distinguishes it from related parts like PDTD123ES (marked "D123ES") and PDTD123ET (marked "*7T").
How does the PDTD123EK compare to the BC817 series in digital applications?
The PDTD123EK is positioned as a cost-saving alternative to the BC817 series in digital switching applications, offering integrated bias resistors that eliminate two external components, reduce PCB area, and simplify layout. Unlike the BC817-40,115 - which requires manual resistor selection and placement - the PDTD123EK guarantees matched R1/R2 ratio (0.9–1.1) and defined VI(on)/VI(off) thresholds. Its 500 mA rating matches BC817-40's capability, but with lower design overhead and tighter parameter control - making the PDTD123EK ideal for high-volume, standardized digital interface nodes.
PDTD123EK,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):
- 2.2 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 40 @ 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
PDTD123EK,115 FAQ
1.How can I place an order for PDTD123EK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTD123EK,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 PDTD123EK,115 reliable?
The price and inventory of PDTD123EK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTD123EK,115 is usually 5 days.
3.What payment methods are accepted for PDTD123EK,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTD123EK,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTD123EK,115?
PDTD123EK,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTD123EK,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 PDTD123EK,115?
For technical support, including PDTD123EK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTD123EK,115 requirements.
6.How does Aetrix verify that PDTD123EK,115 is sourced from the original manufacturer or authorized distributors?
All PDTD123EK,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 PDTD123EK,115 meets industry standards.
7.What is the process for return or replacement of PDTD123EK,115?
All PDTD123EK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTD123EK,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 PDTD123EK,115 part is unused and in its original packaging.
Return procedure for PDTD123EK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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