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NXP Semiconductors PDTD123ES,126
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- Part No.:
- PDTD123ES,126
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
PDTD123ES,126.pdf
- Description:
- TRANS PREBIAS NPN 50V TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,953
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Product details
Overview
PDTD123ES,126 from Nexperia is a 500 mA NPN resistor-equipped transistor (RET) in TO-92 (SOT54) through-hole package, featuring integrated bias resistors R1 = R2 = 2.2 kΩ with ±10 % ratio tolerance. It operates as a digital switch with VCEO = 50 V, VI(on) = 1.5 V (typ), and VCEsat ≤ 0.3 V at IC = 50 mA, used for controlling logic inputs and switching moderate-current loads in automotive and industrial control modules.
For engineers reviewing the PDTD123ES,126 datasheet, PDTD123ES,126 pinout, PDTD123ES,126 application, or PDTD123ES,126 equivalent, key selection criteria include its built-in resistor network eliminating external bias components, 500 mA DC output capability, TO-92 mechanical compatibility, and verified performance across −40 °C to +100 °C ambient operation.
Technical Context
This NPN RET integrates two precision-matched 2.2 kΩ bias resistors (R1 from base to input, R2 from base to emitter) to enable direct TTL/CMOS-level drive without external components. Its fixed resistor ratio (0.9–1.1) ensures stable saturation behavior under varying temperature and supply conditions.
The device delivers 500 mA DC output current with VCEsat ≤ 0.3 V at IC = 50 mA and IB = 2.5 mA, and supports input voltage ranges from −10 V to +12 V. Its thermal resistance Rth(j-a) = 250 K/W on FR4 PCB enables reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; defines safe switching range for 24 V industrial loads. |
| IO (DC) | 500 mA - Continuous output current capacity; supports relay coils, LED arrays, and small solenoids. |
| R1 | 2.2 kΩ (1.54–2.86 kΩ) - Input bias resistor enabling direct logic-level drive; eliminates need for external pull-up/pull-down. |
| R2/R1 | 1.0 ±0.1 - Matched resistor ratio ensuring predictable turn-on threshold and consistent hFE across production lots. |
| VCEsat | ≤0.3 V at IC = 50 mA, IB = 2.5 mA - Low saturation voltage minimizes power loss and self-heating in switching applications. |
| VI(on) | 1.5 V (typ) at VCE = 0.3 V, IC = 20 mA - Guaranteed turn-on threshold compatible with 3.3 V and 5 V logic families. |
| Ptot | 500 mW at Tamb ≤ 25 °C - Total power dissipation rating for TO-92 package; determines maximum continuous load under natural convection. |
Pinout & Package
Package: SOT54 (JEITA SC-43A / JEDEC TO-92), 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) | Connected internally to R1 and R2; accepts logic-level drive directly from MCU GPIO or buffer outputs. |
| 2 | output (collector) | High-current switched node; connects to load (e.g., relay coil anode or LED cathode) with 500 mA capability. |
| 3 | GND (emitter) | Common reference terminal; ties to system ground and completes current path through R2 to base. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in R1/R2 bias network | Eliminates 2 external resistors per switch channel, reducing BOM count and PCB area in multi-channel driver designs. |
| ±10 % R2/R1 tolerance | Ensures consistent VI(on)/VI(off) thresholds across temperature and process variation, improving batch-to-batch reliability. |
| 500 mA DC output rating | Supports direct driving of 24 V/100 Ω loads (e.g., automotive indicator lamps or PLC output stages) without heatsinking. |
| TO-92 mechanical compatibility | Enables drop-in replacement for legacy BC817-based designs using through-hole assembly and manual rework workflows. |
| −40 °C to +150 °C operating range | Validated for under-hood automotive and industrial environments where thermal cycling and long-term stability are critical. |
Applications
| Automotive Body Control Module | Industrial PLC Output Stage |
|---|---|
|
Use Scenario: Switching 12 V indicator lamps and small solenoids in door lock and lighting control units. IC Role / Device Role / Timing Role: Digital output switch translating microcontroller GPIO signals into high-current load activation. Use Value: Built-in resistors reduce component count by 2 per channel and ensure robust turn-on at cold start (−40 °C). |
Use Scenario: Driving 24 V DC relay coils and optocoupler inputs in programmable logic controller output cards. IC Role / Device Role / Timing Role: Level-shifting and current amplification stage between isolated logic and field-side loads. Use Value: 500 mA rating and 50 V VCEO support common industrial control voltages while maintaining low VCEsat for minimal heat generation. |
| Consumer Appliance Control Board | Medical Diagnostic Equipment Interface |
|
Use Scenario: Controlling fan motors, buzzer drivers, and display backlight segments in white goods control boards. IC Role / Device Role / Timing Role: General-purpose digital switch interfacing MCU I/O to higher-power peripherals. Use Value: TO-92 through-hole package allows easy manual prototyping and repair; R1/R2 network simplifies firmware-driven on/off sequencing. |
Use Scenario: Isolating and conditioning sensor alarm signals or actuator enable lines in portable diagnostic devices. IC Role / Device Role / Timing Role: Safe, low-power switching element for non-life-critical auxiliary functions with defined VI(on)/VI(off) margins. Use Value: Tight R2/R1 tolerance and guaranteed VI(on) ≤ 2.0 V ensure reliable activation even with aging or low-voltage battery operation. |
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 | No integrated resistors; requires external R1/R2 network for biasing; hFE = 250–630 vs. PDTD123ES,126's fixed gain via resistor ratio. | Suitable where adjustable gain or variable switching threshold is needed; not drop-in for RET-based layouts. | Select when design flexibility in bias point or thermal derating is prioritized over component count reduction. |
| PDTB123ES,112 | PNP complement with identical R1/R2 values and TO-92 package; VCEO = −50 V, IO = −500 mA. | Used in high-side switching or complementary driver pairs; not interchangeable in NPN-only circuits. | Choose for dual-polarity output stages or when sourcing current from a positive rail is required. |
Compared with BC817-40,115, PDTD123ES,126 reduces bill-of-materials and layout complexity but trades off bias adjustability; versus PDTB123ES,112, it provides complementary polarity rather than functional equivalence, requiring circuit topology changes.
Availability
PDTD123ES,126 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC output stages, and consumer appliance control boards requiring stable component supply and long-lifecycle support.
Supply support for PDTD123ES,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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products business, with focus on automotive, industrial, computing, and consumer markets.
The PDTD123ES,126 belongs to Nexperia's resistor-equipped transistor (RET) family, designed specifically to simplify digital switching in cost-sensitive, high-volume applications by integrating precision bias resistors into standard packages.
FAQ
What is the package type and lead configuration of PDTD123ES,126?
PDTD123ES,126 uses the SOT54 (TO-92) through-hole package with three leads: Pin 1 is input (base), Pin 2 is output (collector), and Pin 3 is GND (emitter). This configuration matches JEDEC TO-92 mechanical standards and supports manual soldering and automated through-hole assembly.
Does PDTD123ES,126 require external bias resistors for operation?
No, PDTD123ES,126 does not require external bias resistors. It integrates R1 = 2.2 kΩ (base-to-input) and R2 = 2.2 kΩ (base-to-emitter) internally, enabling direct connection to 3.3 V or 5 V logic outputs without additional components. This is confirmed in Table 1 and Section 1.2 of the Nexperia datasheet.
What is the maximum continuous collector current rating for PDTD123ES,126?
The maximum continuous DC collector current for PDTD123ES,126 is 500 mA, as specified in Table 2 (Quick reference data) and Table 6 (Limiting values). This rating applies at Tamb ≤ 25 °C with proper PCB thermal relief; derating is required above ambient temperatures per the thermal characteristics table.
How does the R2/R1 ratio affect switching performance in PDTD123ES,126?
The R2/R1 ratio of 1.0 ±0.1 in PDTD123ES,126 ensures tightly controlled VI(on) and VI(off) thresholds-1.0–2.0 V and 0.6–1.8 V respectively-minimizing variation in turn-on timing and noise immunity across temperature and manufacturing lots, as documented in Table 8.
Is PDTD123ES,126 suitable for automotive applications?
Yes, PDTD123ES,126 is qualified for automotive applications per Nexperia's product profile, supporting operation from −40 °C to +150 °C junction temperature and used in digital applications across automotive and industrial segments, including body control modules and lighting systems.
PDTD123ES,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):
- 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:
- 500 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
PDTD123ES,126 FAQ
1.How can I place an order for PDTD123ES,126 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTD123ES,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 PDTD123ES,126 reliable?
The price and inventory of PDTD123ES,126 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTD123ES,126 is usually 5 days.
3.What payment methods are accepted for PDTD123ES,126?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTD123ES,126 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTD123ES,126?
PDTD123ES,126 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTD123ES,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 PDTD123ES,126?
For technical support, including PDTD123ES,126 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTD123ES,126 requirements.
6.How does Aetrix verify that PDTD123ES,126 is sourced from the original manufacturer or authorized distributors?
All PDTD123ES,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 PDTD123ES,126 meets industry standards.
7.What is the process for return or replacement of PDTD123ES,126?
All PDTD123ES,126 units undergo pre-shipment inspection (PSI). If there is an issue with PDTD123ES,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 PDTD123ES,126 part is unused and in its original packaging.
Return procedure for PDTD123ES,126:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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