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Nexperia USA Inc. PDTC143EU,115
- Part No.:
- PDTC143EU,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
PDTC143EU,115.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,813
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Product details
Overview
PDTC143EU from Nexperia is an NPN resistor-equipped transistor (RET) in SOT323 (SC-70) package, designed for digital switching applications with 50 V VCEO, 100 mA IO, and integrated bias resistors R1 = R2 = 4.7 kΩ. It replaces discrete base-resistor + transistor combinations in load switching, IC input control, and industrial digital logic interfaces.
For engineers reviewing the PDTC143EU datasheet, PDTC143EU pinout, PDTC143EU application, or PDTC143EU equivalent, this page delivers verified pin functions, exact resistor values, thermal derating behavior, switching voltage thresholds (VI(on) = 1.9 V typ, VI(off) = 1.1 V typ), and direct BC847-series substitution guidance.
Technical Context
This RET integrates a silicon NPN transistor with two precision on-die resistors: R1 connects input to base, R2 shunts base to emitter-enabling single-pin drive and guaranteed turn-off without external pull-down. Its 230 MHz fT supports fast digital edge rates while maintaining robust saturation (VCE(sat) ≤ 150 mV at IC = 10 mA, IB = 0.5 mA).
The device operates across –65 °C to +150 °C ambient, with junction-to-ambient thermal resistance of 625 K/W on standard FR4 PCB. Its 200 mW Ptot rating and 10 nA–1 µA leakage specs (ICBO, ICEO) ensure stable performance in low-power industrial control nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V industrial bus and 3.3/5 V logic-level switched rails. |
| IO | 100 mA - Continuous output current capability; sufficient for driving LEDs, small relays, MOSFET gates, and logic inputs. |
| R1 / R2 | 4.7 kΩ / 4.7 kΩ - Matched internal bias resistors eliminate external components; sets precise IB for predictable saturation under 3.3 V–5 V drive. |
| VI(on) / VI(off) | 1.9 V / 1.1 V (typ) - Input voltage thresholds define clean digital switching window; ensures noise margin >0.8 V at 25 °C. |
| fT | 230 MHz - Transition frequency of the embedded transistor; supports <5 ns rise/fall times in high-speed digital interface buffering. |
| Ptot | 200 mW @ Tamb ≤ 25 °C - Power dissipation limit on standard FR4; derates linearly above 25 °C per 625 K/W slope. |
Pinout & Package
SOT323 (SC-70) plastic surface-mount package: 2.0 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, three terminals in single-row configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (base node) | Driven directly by MCU GPIO or logic output; internal R1 connects this pin to base, R2 connects base to emitter (pin 2). |
| 2 | GND (emitter) | Emitter terminal tied to system ground; serves as common reference for input and output paths; no external connection required beyond PCB ground plane. |
| 3 | Output (collector) | Switched high-side output node; connects to load (e.g., LED anode, relay coil, MOSFET gate); sinks current when active. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 + R2 bias network | Eliminates need for two external resistors; reduces BOM count by 2 parts and placement footprint by ≥2.5 mm². |
| Guaranteed VI(off) ≤ 1.1 V | Ensures reliable cutoff with 1.8 V logic families (e.g., LVCMOS), preventing unintended turn-on due to leakage or noise. |
| Matched R2/R1 ratio = 1.0 ± 0.2 | Maintains consistent βeff across production lots; enables predictable IC/IIN gain without calibration. |
| SC-70 thermal profile | 625 K/W Rth(j-a) allows 100 mA continuous operation up to 75 °C ambient on standard PCBs without heatsinking. |
Applications
| Industrial Digital I/O | Microcontroller GPIO Buffering |
|---|---|
|
Use Scenario: Isolating and level-shifting 3.3 V MCU outputs to drive 24 V PLC input modules. IC Role / Device Role / Timing Role: NPN switch translating logic signals into current-sinking inputs compliant with IEC 61131-2 Type 1/3 standards. Use Value: Eliminates discrete resistor pair; guarantees VI(off) margin against 24 V field noise coupling, reducing false-trigger risk. |
Use Scenario: Driving multiple parallel LED indicators from limited GPIO resources on an ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Single-pin-controlled current sink enabling independent on/off control per LED without external base resistors. Use Value: Saves 2 resistors per channel; 100 mA rating supports up to 20 mA per LED across five channels with shared thermal budget. |
| Low-Voltage Relay Control | Logic-Level MOSFET Gate Driver |
|
Use Scenario: Activating 5 V/10 mA coil relays in battery-powered HVAC sensor nodes. IC Role / Device Role / Timing Role: Low-quiescent-current switch interfacing 3.3 V microcontroller outputs to relay coils with fast turn-on (<100 ns). Use Value: VCE(sat) ≤ 150 mV minimizes power loss (≤1.5 mW at 10 mA), extending coin-cell life in wireless sensors. |
Use Scenario: Driving the gate of a 20 V-rated N-channel MOSFET used in a 5 V synchronous buck converter's high-side switch. IC Role / Device Role / Timing Role: Level-translating driver providing controlled gate charge/discharge via internal R1/R2 network. Use Value: 230 MHz fT and low Cc (2.5 pF) enable <50 ns switching transitions, reducing shoot-through risk in PWM 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 |
|---|---|---|---|
| BC847B,115 | Discrete NPN transistor requiring external 4.7 kΩ base resistor; no built-in R2; hFE = 200–450 vs. fixed βeff ≈ 20. | Requires PCB layout space for resistor; susceptible to ESD-induced turn-on without R2; less noise-immune in noisy environments. | Select when fine-tuned DC gain or adjustable bias is needed; avoid where board area or reliability under EMI is critical. |
| PDTA143EU,115 | PNP complement with identical R1/R2 values (4.7 kΩ), same SOT323 package, but inverted polarity and VEBO = 10 V. | Used for high-side switching or complementary push-pull stages; not interchangeable without circuit redesign. | Choose only for PNP-side matching in dual-rail logic interfaces or level translators requiring source/sink symmetry. |
Compared with BC847B and PDTA143EU, PDTC143EU uniquely delivers guaranteed turn-off behavior, reduced component count, and immunity to floating-base failure modes-making it optimal for cost-sensitive, high-reliability digital switching where layout simplicity and noise margin are prioritized over gain tuning.
Availability
PDTC143EU is available at Aetrix Electronics and suitable for industrial digital I/O, microcontroller GPIO buffering, low-voltage relay control, and logic-level MOSFET gate driving requiring stable component supply and long-term obsolescence management.
Supply support for PDTC143EU 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
PDTC143EU belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered specifically to replace discrete transistor + resistor combinations in digital switching applications-reducing design complexity and improving manufacturing yield.
FAQ
What is the maximum safe operating voltage for PDTC143EU in a 24 V industrial control circuit?
The PDTC143EU has a VCEO rating of 50 V and VCBO of 50 V, making it suitable for continuous operation in 24 V systems with transient margins. Its 10 V VEBO rating requires that emitter-referenced input signals remain within –10 V to +30 V, ensuring compatibility with standard 24 V PLC backplane noise envelopes.
Can PDTC143EU replace BC847 in existing designs without layout changes?
Yes-PDTC143EU uses the same SOT323 (SC-70) footprint as BC847 series transistors, enabling drop-in replacement. However, because PDTC143EU integrates R1 and R2, the original base resistor must be removed from the PCB to prevent double-biasing and potential overdrive or latch-up conditions.
How does the internal R2 resistor improve reliability compared to discrete base resistors?
The on-die R2 provides a defined path from base to emitter, guaranteeing turn-off even during MCU reset, brown-out, or floating GPIO states. This eliminates risk of unintended conduction caused by leakage currents or EMI coupling-critical in safety-monitored industrial controllers where fail-safe behavior is mandated.
Is PDTC143EU qualified for automotive applications?
No-PDTC143EU is explicitly designated as non-automotive qualified per Nexperia's revision history (v.11, April 2023). It lacks AEC-Q101 qualification, automotive-grade screening, and extended temperature validation. For automotive use, select the -Q qualified variant (e.g., PDTC143EU-Q) or consult Nexperia's automotive RET portfolio.
PDTC143EU,115 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):
- 4.7 kOhms
- Resistor - Emitter Base (R2):
- 4.7 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 30 @ 10mA, 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
PDTC143EU,115 FAQ
1.How can I place an order for PDTC143EU,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC143EU,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 PDTC143EU,115 reliable?
The price and inventory of PDTC143EU,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC143EU,115 is usually 5 days.
3.What payment methods are accepted for PDTC143EU,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC143EU,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC143EU,115?
PDTC143EU,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC143EU,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 PDTC143EU,115?
For technical support, including PDTC143EU,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC143EU,115 requirements.
6.How does Aetrix verify that PDTC143EU,115 is sourced from the original manufacturer or authorized distributors?
All PDTC143EU,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 PDTC143EU,115 meets industry standards.
7.What is the process for return or replacement of PDTC143EU,115?
All PDTC143EU,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC143EU,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 PDTC143EU,115 part is unused and in its original packaging.
Return procedure for PDTC143EU,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTC143EU,115 Tags
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