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Nexperia USA Inc. PDTC144EU,135
- Part No.:
- PDTC144EU,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
PDTC144EU,135.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8,279
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Product details
Overview
PDTC144EU from Nexperia is an NPN resistor-equipped transistor (RET) in SOT323 (SC-70) package, rated for 50 V VCEO, 100 mA output current, with integrated R1 = 47 kΩ and R2 = 47 kΩ bias resistors; used as a digital switch to control IC inputs or low-power loads in industrial control modules.
For engineers reviewing the PDTC144EU datasheet, PDTC144EU pinout, PDTC144EU application, or PDTC144EU equivalent, this page delivers verified pin functions, real-world switching use cases, thermal derating behavior, and validated alternatives for BC847-based digital interface designs.
Technical Context
This RET integrates two precision-matched 47 kΩ resistors to form a voltage-divider bias network directly at the base node, enabling single-resistor drive from microcontroller GPIOs without external components. Its 1:1 R2/R1 ratio ensures predictable turn-on threshold and stable saturation under varying temperature.
The device operates as a saturated switch - not a linear amplifier - with guaranteed VCE(sat) ≤ 150 mV at IC = 10 mA / IB = 0.5 mA, and VI(on) = 1.6–3.0 V across −40 °C to +100 °C, supporting robust logic-level interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; supports 24 V industrial bus switching with safety margin. |
| IO | 100 mA - Continuous DC output current capability; sufficient for driving LEDs, small relays, or logic inputs. |
| R1 | 47 kΩ ±28% - Input bias resistor value; sets base current for predictable switching with 3.3 V/5 V MCU outputs. |
| R2/R1 | 1.0 ±0.2 - Matched resistor ratio; ensures stable base voltage division and consistent turn-on behavior across temperature. |
| VCE(sat) | ≤150 mV at IC=10 mA - Low saturation voltage minimizes power loss and heat generation in switching mode. |
| Ptot | 200 mW at Tamb ≤ 25 °C - Total power dissipation limit on standard FR4 PCB; derates linearly above 25 °C. |
| fT | 230 MHz - Transition frequency of internal transistor; confirms high-speed switching suitability up to ~10 MHz digital signals. |
Pinout & Package
SOT323 (SC-70) plastic surface-mount package: 3-pin, 1.3 mm pitch, 2.0 mm × 1.25 mm × 0.95 mm body height; optimized for high-density PCB layouts and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (base) | Connected to internal R1; accepts logic-level drive signal directly from MCU or gate output. |
| 2 | Ground (emitter) | Emitter tied to system ground; serves as common reference for input and output paths. |
| 3 | Output (collector) | Switched high-side output node; connects to load (e.g., LED anode or relay coil) referenced to VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias network | Eliminates need for two external resistors - reduces BOM count and layout area by ≥2 components per switch node. |
| Guaranteed R2/R1 matching | 0.8–1.2 ratio tolerance ensures consistent VI(on)/VI(off) thresholds across production lots and temperature. |
| Low VCE(sat) at 10 mA | ≤150 mV enables <1.5 mW conduction loss - critical for thermally constrained IoT sensor nodes. |
| SC-70 footprint compatibility | Matches industry-standard SOT323 land pattern; allows drop-in replacement in existing high-density designs. |
Applications
| Industrial Digital I/O Modules | Microcontroller GPIO Expander Interfaces |
|---|---|
Use Scenario: Isolating and level-shifting 3.3 V MCU outputs to drive 24 V PLC input circuits. IC Role / Device Role / Timing Role: Digital switch translating logic states with defined VI(on)/VI(off) thresholds and fast turn-on/turn-off. Use Value: Eliminates discrete resistor pair while maintaining noise immunity via matched R1/R2 bias network. | Use Scenario: Adding extra low-current switching channels to resource-constrained edge-node controllers. IC Role / Device Role / Timing Role: Compact, pre-biased NPN switch enabling direct GPIO connection without external passive components. Use Value: Reduces PCB area by 1.5 mm² per channel and cuts pick-and-place cycle time versus discrete BJT + resistors. |
| LED Indicator Drivers | Small-Signal Load Switches |
Use Scenario: Driving status LEDs in battery-powered handheld instruments with tight thermal budgets. IC Role / Device Role / Timing Role: Constant-current switch operating in saturation with minimal VCE(sat)-induced voltage drop. Use Value: Delivers full LED brightness at 10–20 mA while dissipating <1.5 mW - extends battery life and avoids local heating. | Use Scenario: Enabling/disabling sensors or communication transceivers in always-on embedded systems. IC Role / Device Role / Timing Role: Low-leakage, fast-turning switch controlling power path to peripheral ICs. Use Value: ICEO ≤ 5 µA at 150 °C ensures reliable off-state isolation in high-temp environments like motor control enclosures. |
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 |
|---|---|---|---|
| BC847B,115 | Discrete NPN BJT requiring external 47 kΩ base resistor; no integrated R2; hFE = 200–450 vs. RET's fixed bias. | Requires PCB space and assembly for external resistor; less predictable VI(on) due to hFE variation. | Select when precise gain control or linear operation is needed; not recommended for simplified digital switching. |
| PDTA144EU,135 | PNP complement with identical R1/R2 values and SOT323 package; VECO = 50 V, IO = −100 mA. | Used for high-side switching or inverted logic interfaces where emitter connects to VCC. | Select for complementary high-side drive in push-pull or level-shift configurations with PDTC144EU. |
Compared with BC847B, PDTC144EU reduces component count and improves consistency in digital switching; compared with PDTA144EU, it provides non-inverted low-side drive with identical biasing architecture but opposite polarity.
Availability
PDTC144EU is available at Aetrix Electronics and suitable for industrial digital I/O modules, microcontroller GPIO expander interfaces, and LED indicator drivers requiring stable component supply and long-term manufacturability.
Supply support for PDTC144EU 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 semiconductor expert focused on high-volume, high-reliability essential semiconductors for automotive, industrial, and consumer markets.
PDTC144EU belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, designed specifically to replace discrete BJT + resistor combinations in cost-sensitive, space-constrained digital switching applications.
FAQ
What is the maximum continuous collector current for PDTC144EU?
The PDTC144EU is rated for 100 mA continuous output current (IO) under ambient conditions ≤25 °C on a standard FR4 PCB. Derating applies above 25 °C per the published power curve - at 75 °C ambient, usable current drops to ~60 mA to stay within 200 mW Ptot limit.
Can PDTC144EU replace BC847 in all digital switching circuits?
PDTC144EU can replace BC847 in most digital on/off switching applications where the BC847 uses a single 47 kΩ base resistor, but not in linear amplifier or analog gain-control roles. Its fixed R1/R2 network eliminates resistor selection effort but removes gain adjustability - verify VI(on)/VI(off) thresholds match your controller's logic levels.
What is the function of the second resistor (R2) in PDTC144EU?
R2 connects between base and emitter internally, forming a feedback path that stabilizes the base voltage during switching transitions and improves noise immunity. With R1 = R2 = 47 kΩ, it creates a 1:1 divider that defines a predictable VI(on) threshold (~1.6–3.0 V), reducing sensitivity to hFE variation and temperature drift.
Is PDTC144EU qualified for automotive applications?
No. Per Nexperia's 2023 data sheet revision, PDTC144EU is explicitly designated as non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade process controls. For automotive use, select the -Q qualified variant (e.g., PDTC144EU-Q) or consult Nexperia's automotive RET portfolio.
PDTC144EU,135 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 47 kOhms
- Resistor - Emitter Base (R2):
- 47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 80 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- -
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
PDTC144EU,135 FAQ
1.How can I place an order for PDTC144EU,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC144EU,135 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 PDTC144EU,135 reliable?
The price and inventory of PDTC144EU,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC144EU,135 is usually 5 days.
3.What payment methods are accepted for PDTC144EU,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC144EU,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC144EU,135?
PDTC144EU,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC144EU,135 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 PDTC144EU,135?
For technical support, including PDTC144EU,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC144EU,135 requirements.
6.How does Aetrix verify that PDTC144EU,135 is sourced from the original manufacturer or authorized distributors?
All PDTC144EU,135 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 PDTC144EU,135 meets industry standards.
7.What is the process for return or replacement of PDTC144EU,135?
All PDTC144EU,135 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC144EU,135, 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 PDTC144EU,135 part is unused and in its original packaging.
Return procedure for PDTC144EU,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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