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NXP Semiconductors PDTD123YK,115
- Part No.:
- PDTD123YK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTD123YK,115.pdf
- Description:
- TRANS PREBIAS NPN 50V 0.5A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:6,448
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Product details
Overview
PDTD123YK from NXP Semiconductors is a 500 mA, 50 V NPN resistor-equipped transistor (RET) with integrated bias resistors R1 = 2.2 kΩ and R2 = 10 kΩ, designed for digital switching in automotive and industrial control circuits. It delivers ±10 % resistor ratio tolerance, 0.3 V collector-emitter saturation voltage at IC = 50 mA/IB = 2.5 mA, and operates up to 150 °C junction temperature.
For engineers reviewing the PDTD123YK datasheet, PDTD123YK pinout, PDTD123YK application, or PDTD123YK equivalent, this device serves as a cost-optimized, reduced-component-count alternative to discrete BJT + resistor networks in load switching, microcontroller I/O interfacing, and level translation where guaranteed turn-on/off thresholds and stable gain are required.
Technical Context
The PDTD123YK integrates two precision thin-film resistors (R1 = 2.2 kΩ, R2 = 10 kΩ) directly into an NPN silicon transistor die, forming a monolithic bias network that eliminates external base resistors. Its R2/R1 ratio of 4.55 (typ.) ensures predictable current gain control and stable saturation behavior across temperature.
Designed for DC switching rather than linear amplification, it features VI(on) = 0.5–1.4 V (typ. 1 V) and VI(off) = 0.4–1.0 V (typ. 0.6 V), enabling reliable logic-level drive from 3.3 V or 5 V microcontrollers without additional level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum safe collector-emitter voltage under open-base conditions; supports 24 V industrial bus and 12 V automotive loads with margin. |
| IO (DC) | 500 mA - Continuous output current capability; sufficient for driving relays, LEDs, small solenoids, or logic inputs. |
| R1 | 2.2 kΩ ±30 % - Input bias resistor value; sets base current magnitude when driven by logic-high voltage. |
| R2/R1 | 4.55 (typ.), 4.1–5.0 - Resistor ratio defining feedback path; stabilizes operating point against β variation and temperature drift. |
| VCEsat | ≤0.3 V at IC = 50 mA / IB = 2.5 mA - Low saturation voltage minimizes power loss and heat generation during on-state operation. |
| VI(on) | 0.5–1.4 V (typ. 1.0 V) - Minimum input voltage required to achieve IC ≥ 20 mA; ensures compatibility with TTL and CMOS logic outputs. |
| hFE | 70 (min.) at VCE = 5 V, IC = 50 mA - Guaranteed DC current gain enables predictable switching margins without external gain compensation. |
Pinout & Package
SOT346 (SC-59A / TO-236) surface-mount plastic package with standard footprint, 3-pin configuration, and 250 mW power dissipation rating at Tamb ≤ 25 °C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | input (base) | Connected internally to R1; accepts logic-level drive signal; no external base resistor needed. |
| 2 | GND (emitter) | Emitter terminal tied to system ground; provides 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) referenced to positive supply. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in bias resistors R1/R2 | Eliminates two external components per switch, reducing BOM count and PCB area in multi-channel driver designs. |
| ±10 % R2/R1 tolerance | Ensures consistent turn-on characteristics across production lots, critical for deterministic timing in synchronous control systems. |
| 500 mA DC output rating | Supports direct drive of medium-power loads such as automotive indicator lamps or industrial status LEDs without external buffer stages. |
| VI(off) ≤ 1.0 V (max) | Guarantees full cutoff with 0 V or near-zero logic-low signals, preventing unintended conduction in noisy environments. |
| JEDEC TO-236 compatible | Enables drop-in replacement in legacy SOT23/SOT346 footprints; supports automated pick-and-place with standard 4 mm tape reel (115 variant). |
Applications
| Automotive Interior Lighting Control | Industrial PLC Digital Output Module |
|---|---|
|
Use Scenario: Switching 12 V LED strips and incandescent bulbs in vehicle cabin lighting systems. IC Role / Device Role / Timing Role: NPN RET acting as low-side load switch controlled by MCU GPIO pins. Use Value: Built-in R1/R2 eliminates need for discrete base resistors, reducing component count and improving ESD robustness in harsh automotive environments. |
Use Scenario: Driving 24 V DC solenoid valves and indicator LEDs in programmable logic controller output cards. IC Role / Device Role / Timing Role: Logic-level-controlled switching element interfacing between FPGA/CPLD I/O and field-side loads. Use Value: 500 mA rating and 50 V VCEO provide headroom for inductive kickback suppression and transient overvoltage protection without snubbers. |
| Microcontroller I/O Expansion | Consumer Appliance Power Sequencing |
|
Use Scenario: Expanding limited GPIO count on ARM Cortex-M0+ MCUs to control multiple peripheral enable lines. IC Role / Device Role / Timing Role: Digital interface translator converting 3.3 V logic levels to higher-current drive capability. Use Value: VI(on) = 0.5–1.4 V ensures reliable turn-on even with marginal logic-high voltages, avoiding metastability in timing-critical enable paths. |
Use Scenario: Enabling sequential power-up of motor drivers, display backlights, and sensor modules in smart home appliances. IC Role / Device Role / Timing Role: Precision-timed load switch activated by system supervisor IC or PMIC. Use Value: Tight R2/R1 ratio (4.1–5.0) maintains consistent switching thresholds across temperature, ensuring repeatable sequencing timing. |
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 |
|---|---|---|---|
| BC817-40,115 | Discrete NPN BJT (no built-in resistors); hFE = 250–630; requires external base resistor network. | Higher gain but increased component count and layout sensitivity; less suitable for space-constrained or high-reliability automotive modules. | Select BC817-40,115 only when variable gain tuning or thermal derating flexibility is required beyond fixed RET performance. |
| PDTB123YK,115 | PNP complement with identical R1/R2 values and SOT346 package; VCEO = −50 V, IO = −500 mA. | Used for high-side switching or complementary push-pull configurations; not interchangeable in NPN topology without circuit redesign. | Choose PDTB123YK,115 when designing bidirectional current control or active pull-up functionality alongside PDTD123YK. |
Compared with BC817-40,115, PDTD123YK reduces design complexity and improves production yield by integrating biasing; compared with PDTB123YK,115, it provides complementary polarity for low-side switching while sharing identical thermal and packaging characteristics.
Availability
PDTD123YK is available at Aetrix Electronics and suitable for automotive interior lighting control, industrial PLC digital output modules, and microcontroller I/O expansion requiring stable component supply and long-term lifecycle support.
Supply support for PDTD123YK 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The PDTD123YK belongs to NXP's resistor-equipped transistor (RET) family, engineered to simplify digital switching designs by replacing discrete BJT + resistor combinations with monolithic, production-validated devices for cost-sensitive, high-volume applications.
FAQ
What is the maximum continuous collector current for PDTD123YK?
The PDTD123YK supports a maximum continuous DC collector current (IO) of 500 mA, as specified in its limiting values table. This rating applies under standard FR4 PCB mounting conditions with single-sided copper and tin-plated traces. Derating is required above Tamb = 25 °C per the thermal resistance (Rth(j-a) = 500 K/W) and power dissipation limit of 250 mW.
Does PDTD123YK require external base resistors?
No, PDTD123YK does not require external base resistors. It integrates R1 = 2.2 kΩ and R2 = 10 kΩ internally, forming a complete bias network. The input pin (Pin 1) connects directly to a logic source, and the emitter (Pin 2) and collector (Pin 3) interface with the load-eliminating two passive components per switch in typical digital applications.
What is the package type and footprint compatibility of PDTD123YK?
PDTD123YK uses the SOT346 (SC-59A / JEDEC TO-236) surface-mount package. Its 3-pin outline matches standard SOT23 land patterns, enabling mechanical compatibility with existing pick-and-place equipment and reflow profiles. The 4 mm pitch, 8 mm tape-and-reel format (variant -115) supports automated assembly.
How does the R2/R1 ratio affect PDTD123YK performance?
The R2/R1 ratio of 4.55 (typical), with a range of 4.1–5.0, determines the internal feedback strength and stabilizes the transistor's operating point against variations in hFE and temperature. This ratio directly influences VI(on) and VI(off) thresholds, ensuring consistent switching behavior across batches and environmental conditions without external trimming.
Is PDTD123YK suitable for automotive applications?
Yes, PDTD123YK is qualified for automotive interior applications, as confirmed by its inclusion in NXP's automotive-grade RET portfolio, 150 °C maximum junction temperature rating, and design for use in 12 V systems with transient immunity. It meets AEC-Q101 stress test requirements when used within its specified limiting values and thermal constraints.
PDTD123YK,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):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 70 @ 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
PDTD123YK,115 FAQ
1.How can I place an order for PDTD123YK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTD123YK,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 PDTD123YK,115 reliable?
The price and inventory of PDTD123YK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTD123YK,115 is usually 5 days.
3.What payment methods are accepted for PDTD123YK,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTD123YK,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTD123YK,115?
PDTD123YK,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTD123YK,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 PDTD123YK,115?
For technical support, including PDTD123YK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTD123YK,115 requirements.
6.How does Aetrix verify that PDTD123YK,115 is sourced from the original manufacturer or authorized distributors?
All PDTD123YK,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 PDTD123YK,115 meets industry standards.
7.What is the process for return or replacement of PDTD123YK,115?
All PDTD123YK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTD123YK,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 PDTD123YK,115 part is unused and in its original packaging.
Return procedure for PDTD123YK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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