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NXP Semiconductors PDTD123YS,126
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- Part No.:
- PDTD123YS,126
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
PDTD123YS,126.pdf
- Description:
- TRANS PREBIAS NPN 50V TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,319
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Product details
Overview
PDTD123YS,126 from NXP Semiconductors is a through-hole NPN resistor-equipped transistor (RET) designed for digital switching in automotive and industrial control circuits. It features built-in bias resistors R1 = 2.2 kΩ and R2 = 10 kΩ, 500 mA DC output current capability, 50 V collector-emitter voltage rating, ±10 % resistor ratio tolerance, and TO-92 (SOT54) package with 3-pin leaded configuration.
For engineers reviewing the PDTD123YS,126 datasheet, PDTD123YS,126 pinout, PDTD123YS,126 application, or PDTD123YS,126 equivalent, this part serves as a cost-optimized, component-count-reducing alternative to discrete BJT + resistor combinations in load switching and IC input driving applications where simplified PCB layout and reduced assembly cost are critical.
Technical Context
The PDTD123YS,126 integrates two precision thin-film resistors (R1 = 2.2 kΩ, R2 = 10 kΩ) directly into an NPN silicon transistor die, forming a monolithic resistor-equipped transistor. Its internal R2-to-R1 ratio of 4.55 ±10 % ensures stable base biasing across temperature and process variation.
It operates with VI(on) = 0.5–1.4 V at IC = 20 mA and VI(off) = 0.4–1.0 V at IC = 100 μA, enabling reliable logic-level interfacing with microcontrollers and gate drivers. The device delivers VCEsat ≤ 0.3 V at IC = 50 mA / IB = 2.5 mA and supports junction temperatures up to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum safe collector-emitter voltage under open-base condition; defines maximum load supply rail compatibility. |
| IO (DC) | 500 mA - Continuous output current handling capacity; supports medium-power relay, LED, and solenoid loads. |
| R1 | 2.2 kΩ ±30 % - Input bias resistor value; sets base current magnitude when driven by logic-level signals. |
| R2/R1 | 4.55 ±10 % - Precision resistor ratio determining feedback stability and saturation margin in digital switch mode. |
| VCEsat | ≤ 0.3 V at IC = 50 mA - Low saturation voltage minimizes power loss and heat generation during on-state operation. |
| VI(on) | 0.5–1.4 V at IC = 20 mA - Valid input voltage range to reliably turn on the transistor; compatible with 3.3 V and 5 V logic families. |
| hFE | ≥ 70 at VCE = 5 V, IC = 50 mA - Minimum DC current gain ensures sufficient drive margin without external base current calculation. |
Pinout & Package
Package: SC-43A (JEITA), TO-92 (JEDEC), SOT54 (NXP); plastic single-ended leaded through-hole package with standard 2.54 mm lead pitch and 5.2 mm body height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | input (base) | Internal connection to R1 and R2 network; accepts logic-level control signal; no external base resistor required. |
| 2 | output (collector) | High-current output node; connects to load (e.g., relay coil, LED string); rated for 500 mA continuous DC. |
| 3 | GND (emitter) | Common reference terminal; ties to system ground; forms return path for load current and bias network. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in bias resistors R1 & R2 | Eliminates need for two external SMT or through-hole resistors, reducing BOM count and PCB real estate. |
| ±10 % R2/R1 ratio tolerance | Ensures consistent saturation behavior and predictable turn-on thresholds across production lots and temperature ranges. |
| 500 mA output current rating | Supports direct driving of medium-power loads such as automotive indicator lamps, industrial status LEDs, and small solenoids. |
| TO-92 through-hole package | Enables manual prototyping, legacy board repair, and high-reliability through-hole assembly in harsh environments. |
| VI(off) ≤ 1.0 V at IC = 100 μA | Guarantees robust off-state immunity against noise coupling and leakage currents in noisy industrial settings. |
Applications
| Automotive Interior Lighting Control | Industrial PLC Digital Output Module |
|---|---|
|
Use Scenario: Switching 12 V LED strips and incandescent bulbs in dashboard and cabin lighting systems. IC Role / Device Role / Timing Role: NPN RET acting as low-side load switch controlled by MCU GPIO pins. Use Value: Reduces component count per channel by two resistors, lowers assembly cost, and improves thermal reliability vs. discrete BJT solutions. |
Use Scenario: Driving 24 V DC solenoid valves and indicator LEDs in programmable logic controller output stages. IC Role / Device Role / Timing Role: Logic-level-compatible digital output driver with integrated bias network. Use Value: Enables direct interface with 3.3 V/5 V FPGA or microcontroller outputs without level-shifting or external bias components. |
| Consumer Appliance Power Sequencing | Medical Diagnostic Equipment Status Indication |
|
Use Scenario: Enabling sequential power-up of subsystems (e.g., display backlight, sensor modules) in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Medium-current digital switch controlling enable lines and reset signals. Use Value: Simplifies timing-critical sequencing design by eliminating resistor selection and placement errors in discrete implementations. |
Use Scenario: Driving multi-color status LEDs (red/green/yellow) on diagnostic instrument front panels with isolated logic control. IC Role / Device Role / Timing Role: Isolated low-side LED driver with guaranteed VI(on)/VI(off) margins for noise-immune visual feedback. Use Value: Ensures unambiguous LED state indication under EMI-prone conditions due to tight resistor ratio and defined threshold voltages. |
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 without integrated resistors; requires external R1/R2; hFE = 250–630; same SOT23 footprint but different package type. | Used where adjustable bias or higher gain is needed; not drop-in compatible due to missing internal resistors and different pinout. | Select BC817-40,115 only when custom bias tuning or higher hFE is required; additional resistors increase BOM and layout complexity. |
| PDTB123YS,112 | PNP complement of PDTD123YS,126; identical R1/R2 values and TO-92 package; VCEO = −50 V; IO = −500 mA. | Used for high-side switching or complementary logic stages; shares same footprint and thermal profile but opposite polarity. | Choose PDTB123YS,112 when implementing push-pull outputs, level inversion, or sourcing current in the same system architecture. |
Compared with BC817-40,115 and PDTB123YS,112, the PDTD123YS,126 provides a complete, calibrated NPN switching solution in TO-92 with no external bias components-reducing design time, test iterations, and long-term field failure risk from resistor drift or solder joint fatigue.
Availability
PDTD123YS,126 is available at Aetrix Electronics and suitable for automotive interior lighting control, industrial PLC digital output modules, and consumer appliance power sequencing requiring stable component supply and through-hole assembly compatibility.
Supply support for PDTD123YS,126 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 PDTD123YS,126 belongs to NXP's resistor-equipped transistor (RET) family, engineered to replace discrete BJT + resistor combinations in cost-sensitive, high-volume digital switching applications where reliability and assembly efficiency are prioritized.
FAQ
What is the package type and lead configuration of PDTD123YS,126?
The PDTD123YS,126 uses the SOT54 package, also known as TO-92 or SC-43A, with three straight through-hole leads spaced at 2.54 mm pitch. Pin 1 is input (base), Pin 2 is output (collector), and Pin 3 is GND (emitter). This configuration supports manual soldering and legacy board designs requiring mechanical robustness.
Does PDTD123YS,126 require external base resistors for operation?
No, the PDTD123YS,126 does not require external base resistors because it integrates R1 = 2.2 kΩ and R2 = 10 kΩ internally. These resistors provide fixed biasing that enables direct connection to 3.3 V or 5 V logic outputs, eliminating design steps related to resistor selection, placement, and tolerance stacking.
What is the maximum continuous collector current rating for PDTD123YS,126?
The PDTD123YS,126 is rated for 500 mA DC output current under standard FR4 PCB mounting conditions (single-sided copper, tin-plated). This rating applies at ambient temperatures up to 25 °C; derating is required above Tamb = 25 °C per the thermal resistance Rth(j-a) = 250 K/W specified for the SOT54 package.
How does the R2/R1 ratio affect switching performance in PDTD123YS,126?
The R2/R1 ratio of 4.55 ±10 % in the PDTD123YS,126 determines the internal feedback strength and saturation depth. A tightly controlled ratio ensures consistent VCEsat ≤ 0.3 V and prevents unintended partial turn-on due to process or temperature variation-critical for reliable digital on/off behavior in automotive and industrial environments.
Is PDTD123YS,126 suitable for use in automotive applications?
Yes, the PDTD123YS,126 is explicitly qualified for automotive interior lighting control per its product profile and quick reference data. It meets 50 V VCEO, 150 °C Tj, and −65 °C to +150 °C storage/ambient temperature specifications, and its resistor-equipped architecture reduces failure modes associated with external component aging or solder joint fatigue in vibration-prone environments.
PDTD123YS,126 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Box (TB)
- 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:
- 500 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
PDTD123YS,126 FAQ
1.How can I place an order for PDTD123YS,126 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTD123YS,126 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 PDTD123YS,126 reliable?
The price and inventory of PDTD123YS,126 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTD123YS,126 is usually 5 days.
3.What payment methods are accepted for PDTD123YS,126?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTD123YS,126 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTD123YS,126?
PDTD123YS,126 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTD123YS,126 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 PDTD123YS,126?
For technical support, including PDTD123YS,126 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTD123YS,126 requirements.
6.How does Aetrix verify that PDTD123YS,126 is sourced from the original manufacturer or authorized distributors?
All PDTD123YS,126 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 PDTD123YS,126 meets industry standards.
7.What is the process for return or replacement of PDTD123YS,126?
All PDTD123YS,126 units undergo pre-shipment inspection (PSI). If there is an issue with PDTD123YS,126, 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 PDTD123YS,126 part is unused and in its original packaging.
Return procedure for PDTD123YS,126:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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