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NXP Semiconductors PDTC124ES,126
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- Part No.:
- PDTC124ES,126
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
PDTC124ES,126.pdf
- Description:
- TRANS PREBIAS NPN 50V TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,453
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Product details
Overview
PDTC124ES,126 from NXP Semiconductors is an NPN resistor-equipped transistor in TO-92 (SOT54) package with integrated 22 kΩ base bias resistors (R1 = R2 = 22 kΩ), rated for 50 V VCEO, 100 mA IO, and 500 mW Ptot; used for general-purpose switching in interface and inverter circuits.
For engineers reviewing the PDTC124ES,126 datasheet, PDTC124ES,126 pinout, PDTC124ES,126 application, or PDTC124ES,126 equivalent, this discrete device simplifies BJT-based logic-level translation, reduces external component count, and supports reliable through-hole mounting in space-constrained industrial control modules and consumer appliance PCBs.
Technical Context
The PDTC124ES,126 integrates two precision-matched 22 kΩ bias resistors (R1, R2) directly into an NPN silicon transistor die, eliminating external base resistors required for standard BJT switching configurations. Its internal resistor network enables direct TTL/CMOS-compatible input drive without level-shifting circuitry.
This device operates as a single-stage digital switch with guaranteed hFE ≥ 60 at IC = 5 mA, VCE = 5 V, and exhibits low VCE(sat) ≤ 150 mV at IC = 10 mA / IB = 0.5 mA - enabling efficient current sourcing in load-driving applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V maximum - supports operation in 24 V industrial bus and 36 V automotive subsystems without derating. |
| IO (DC) | 100 mA maximum - sufficient to drive LEDs, small relays, and logic inputs directly. |
| R1 / R2 | 22 kΩ ±30% - provides fixed-current base bias enabling predictable turn-on at ~0.5 mA for 5 V logic inputs. |
| Ptot | 500 mW at Tamb ≤ 25 °C - allows continuous operation in ambient temperatures up to +70 °C with minimal heatsinking. |
| hFE | ≥60 at IC = 5 mA - ensures robust saturation under typical microcontroller GPIO drive conditions. |
| VCE(sat) | ≤150 mV at IC = 10 mA - minimizes power loss and self-heating during active switching. |
Pinout & Package
PDTC124ES,126 uses the SOT54 (TO-92) through-hole plastic package with 3 leads, 5.2 mm × 4.8 mm × 14.5 mm body dimensions, and standard lead pitch of 2.54 mm. It is designed for wave or hand soldering per NXP's recommended mounting conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Input node connected internally to R1 (22 kΩ) and R2 (22 kΩ); accepts logic-level voltage to enable transistor conduction. |
| 2 | Collector | High-side output terminal; connects to load supply rail (e.g., 5–24 V) and switches current to emitter. |
| 3 | Emitter | Low-side return path; tied to ground or reference potential; carries full switched load current. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in bias resistors | Eliminates need for two external 22 kΩ resistors, reducing BOM count and PCB real estate by ~3 mm² per instance. |
| Guaranteed hFE ≥ 60 | Ensures reliable saturation with standard 5 V CMOS/TTL outputs driving base via R1, avoiding marginal switching behavior. |
| VCE(sat) ≤ 150 mV | Reduces power dissipation to <1.5 mW at 10 mA load, supporting thermally constrained designs without thermal relief pads. |
| TO-92 mechanical compatibility | Enables drop-in replacement for legacy discrete BJT + resistor combinations using standard through-hole tooling and rework workflows. |
Applications
| Industrial Sensor Interface | Consumer Appliance Control |
|---|---|
Use Scenario: Level-shifting signal from 3.3 V MCU GPIO to activate 12 V solenoid valve in HVAC controller. IC Role / Device Role / Timing Role: Digital switch translating logic state to higher-voltage load control with no external bias components. Use Value: Reduces bill-of-materials by two 0805 resistors and associated placement cost while maintaining noise-immune switching margin. | Use Scenario: Driving indicator LED strings in microwave oven UI panel powered from 5 V rail. IC Role / Device Role / Timing Role: Constant-current sink switch enabling precise brightness control via PWM on base pin. Use Value: Delivers stable 20–100 mA LED current with <150 mV dropout, minimizing heat generation in sealed enclosure. |
| Automotive Body Control Module | Power Supply Enable Circuit |
Use Scenario: Enabling 24 V fan driver IC based on LIN bus command in door module. IC Role / Device Role / Timing Role: High-side enable switch isolating 24 V domain from 5 V microcontroller domain. Use Value: Withstands 50 V VCEO and operates reliably across −40 °C to +125 °C junction range per AEC-Q101 stress guidelines. | Use Scenario: Sequencing power-up of secondary LDO by enabling its EN pin only after primary regulator stabilizes. IC Role / Device Role / Timing Role: Delayed-enable logic gate using RC time constant on base resistor network. Use Value: Built-in R1/R2 allow simple RC timing network (e.g., 100 nF + R1) to generate ~2.2 ms enable delay without extra IC. |
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 |
|---|---|---|---|
| PDTC114ES,126 | R1 = 10 kΩ, R2 = 10 kΩ - delivers ~1 mA base current at 5 V, higher gain sensitivity but lower input impedance. | Better suited for weak-drive sources (e.g., open-drain I²C lines), less tolerant of leakage-induced false triggering. | Select when driving from high-impedance nodes or requiring faster turn-on with same VIN. |
| MMBT3904BRM | Standard BJT without built-in resistors - requires external RB and RBE; hFE = 100–300 (wider spread), no guaranteed VCE(sat) spec. | Offers higher hFE and lower VCE(sat) at optimized bias, but increases design complexity and layout area. | Choose when fine-tuned bias optimization is critical and additional components are acceptable. |
Compared with PDTC124ES,126, PDTC114ES,126 provides stronger base drive for marginal input sources, while MMBT3904BRM offers higher gain flexibility at the cost of added external components and tighter layout control requirements.
Availability
PDTC124ES,126 is available at Aetrix Electronics and suitable for industrial sensor interfaces, consumer appliance control, automotive body electronics, and power supply sequencing requiring stable component supply and long-term obsolescence management.
Supply support for PDTC124ES,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 PDTC124ES,126 belongs to NXP's resistor-equipped transistor (RET) product line, engineered to reduce discrete BJT circuit complexity in cost-sensitive, high-volume switching applications where reliability and assembly efficiency are critical.
FAQ
What is the package type and lead configuration of PDTC124ES,126?
PDTC124ES,126 uses the SOT54 (TO-92) through-hole package with three leads arranged as Base (pin 1), Collector (pin 2), and Emitter (pin 3). Its mechanical outline conforms to JEDEC TO-92 standards, with 2.54 mm lead pitch and 14.5 mm overall length - compatible with standard wave-soldering equipment and manual rework tools.
Does PDTC124ES,126 require external base resistors for operation?
No, PDTC124ES,126 does not require external base resistors. It integrates two 22 kΩ resistors (R1 and R2) internally: R1 connects base to input, and R2 connects base to emitter. This configuration enables direct connection to 3.3 V or 5 V logic outputs without additional components, simplifying schematic design and reducing PCB footprint.
What is the maximum continuous collector current rating for PDTC124ES,126?
The maximum continuous DC collector current (IO) for PDTC124ES,126 is 100 mA, as specified in the Quick Reference Data and Limiting Values sections of the NXP datasheet. This rating applies at Tamb ≤ 25 °C with proper PCB thermal relief; derating is required above 25 °C ambient per the 250 K/W junction-to-ambient thermal resistance.
Can PDTC124ES,126 be used in automotive applications?
PDTC124ES,126 meets key electrical and thermal specifications for automotive body electronics (e.g., 50 V VCEO, −40 °C to +150 °C Tj range), but it is not AEC-Q101 qualified. For production automotive use, NXP recommends verifying qualification status per part marking and consulting latest NXP automotive-grade RET variants such as the PDTD124ES series.
How does the built-in resistor ratio affect switching performance of PDTC124ES,126?
The PDTC124ES,126 features a 1:1 resistor ratio (R1/R2 = 1), ensuring stable bias point and predictable VI(on) (~1.7 V) and VI(off) (~0.8 V) thresholds. This ratio minimizes sensitivity to temperature drift and process variation, delivering consistent turn-on/off behavior across operating conditions without requiring recalibration or trimming.
PDTC124ES,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):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 22 kOhms
- Resistor - Emitter Base (R2):
- 22 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 60 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- -
- Power - Max:
- 500 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
PDTC124ES,126 FAQ
1.How can I place an order for PDTC124ES,126 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC124ES,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 PDTC124ES,126 reliable?
The price and inventory of PDTC124ES,126 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC124ES,126 is usually 5 days.
3.What payment methods are accepted for PDTC124ES,126?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC124ES,126 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC124ES,126?
PDTC124ES,126 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC124ES,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 PDTC124ES,126?
For technical support, including PDTC124ES,126 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC124ES,126 requirements.
6.How does Aetrix verify that PDTC124ES,126 is sourced from the original manufacturer or authorized distributors?
All PDTC124ES,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 PDTC124ES,126 meets industry standards.
7.What is the process for return or replacement of PDTC124ES,126?
All PDTC124ES,126 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC124ES,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 PDTC124ES,126 part is unused and in its original packaging.
Return procedure for PDTC124ES,126:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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