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Nexperia USA Inc. PDTC143TU/ZLF
- Part No.:
- PDTC143TU/ZLF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
PDTC143TU/ZLF.pdf
- Description:
- TRANS PREBIAS
- Quantity:
- Payment:
- Shipping:
Inventory:3,054
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Product details
Overview
PDTC143TU from Nexperia is an NPN resistor-equipped transistor (RET) with integrated 4.7 kΩ base bias resistor (R1), open R2 configuration, 50 V VCEO, 100 mA IO, and SOT323 (SC-70) package - used for compact logic-level switching in space-constrained digital interface circuits.
For engineers reviewing the PDTC143TU datasheet, PDTC143TU pinout, PDTC143TU application, or PDTC143TU equivalent, this page delivers verified pin functions, thermal resistance (625 K/W), DC current gain (hFE ≥ 200 at IC = 1 mA), saturation voltage (≤100 mV), and real-world switching use cases in level translation and load control.
Technical Context
This RET integrates a single 4.7 kΩ pull-up resistor between base and input terminal, eliminating external bias components while maintaining standard NPN switching behavior. It operates with open-emitter or open-collector configurations depending on PCB layout, supporting direct connection to CMOS/TTL outputs without additional resistors.
Designed for low-power digital switching, it delivers guaranteed hFE ≥ 200 at IC = 1 mA and VCE = 5 V, with VCE(sat) ≤ 100 mV at IC = 5 mA / IB = 0.25 mA - enabling efficient drive of LEDs, small relays, and MOSFET gates in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - supports rail-to-rail switching up to 5 V logic with margin for transient spikes in 3.3 V/5 V systems. |
| IO | 100 mA - sufficient to drive medium-current loads like indicator LEDs, small-signal relays, or gate capacitance of low-side MOSFETs. |
| R1 | 4.7 kΩ ±25% - sets base current for predictable turn-on with standard microcontroller GPIOs (e.g., 3.3 V output → ~0.5 mA IB). |
| hFE | ≥200 at IC = 1 mA - ensures robust saturation even with aging or temperature drift, reducing risk of partial turn-on in critical control paths. |
| VCE(sat) | ≤100 mV at IC = 5 mA - minimizes power loss (<0.5 mW) and self-heating during sustained conduction in portable devices. |
| Rth(j-a) | 625 K/W - reflects thermal limitation of SOT323 package; requires minimal copper area for ambient operation up to +70 °C. |
Pinout & Package
PDTC143TU uses the SOT323 (SC-70) plastic surface-mounted package: 1.1 mm × 0.8 mm × 0.5 mm body, 3-lead, lead pitch 0.65 mm, designed for reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Input node connected to internal R1 | Accepts logic-level signal; R1 pulls base high when driven low - enables active-low switching without external resistor. |
| 2 (Emitter) | Common emitter reference | Connected to GND in low-side switch configuration; provides return path for load current and defines emitter-follower output reference. |
| 3 (Collector) | Switched output node | Sinks current from load (e.g., LED anode or relay coil) to ground when saturated; rated for 50 V blocking and 100 mA continuous DC. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in 4.7 kΩ base resistor | Eliminates need for discrete bias resistor, reducing BOM count by one component and saving 0.5–1.0 mm² PCB area per instance. |
| Guaranteed hFE ≥ 200 | Ensures reliable saturation across temperature (-65 °C to +150 °C) and process variation, avoiding marginal conduction in safety-critical enable paths. |
| VCE(sat) ≤ 100 mV | Reduces power dissipation to <0.5 mW at 5 mA load - critical for thermally constrained wearable or IoT sensor nodes. |
| SOT323 footprint compatibility | Enables drop-in replacement for other SC-70 transistors (e.g., BC847, MMBT3904) in existing layouts where RET functionality is added later. |
Applications
| LED Indicator Control | Microcontroller GPIO Expansion |
|---|---|
|
Use Scenario: Driving status LEDs from 3.3 V MCU pins with limited sink/source capability. IC Role / Device Role / Timing Role: Low-side switch that translates logic-high output into LED-on state via collector-emitter conduction. Use Value: Eliminates external base resistor; 100 mV VCE(sat) ensures >95% of supply voltage reaches LED for consistent brightness at 5–10 mA. |
Use Scenario: Extending limited GPIO count to control multiple peripheral enable lines (e.g., sensors, displays). IC Role / Device Role / Timing Role: Digital buffer providing level-shifted, current-amplified enable signals to downstream ICs. Use Value: 200 hFE guarantees full saturation with 0.25 mA base drive - compatible with weak-drive MCUs like ARM Cortex-M0+. |
| Low-Power Relay Driver | Logic-Level Signal Inversion |
|
Use Scenario: Activating 5 V, 30 mA coil relays from battery-powered controllers. IC Role / Device Role / Timing Role: Saturated switch interfacing MCU output to relay coil, with flyback diode externally placed. Use Value: 100 mA IO rating exceeds relay coil requirement; 50 V VCEO accommodates inductive kickback without clamping circuitry. |
Use Scenario: Converting active-high control signals to active-low outputs for legacy peripherals. IC Role / Device Role / Timing Role: Inverter stage using common-emitter topology with fixed bias network. Use Value: Built-in R1 ensures stable DC operating point; propagation delay <20 ns enables sub-50 MHz toggling in timing-critical interfaces. |
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 |
|---|---|---|---|
| PDTC143ET,115 (Nexperia) | SOT416 (SC-75) package; higher Rth(j-a) = 833 K/W; same R1 = 4.7 kΩ, VCEO = 50 V. | Smaller footprint (1.0 × 0.6 mm) but lower power handling; suitable only for <50 mA loads at ambient <50 °C. | Select when board space is more constrained than thermal margin, and load current remains below 50 mA. |
| MMBT3904LT1G (onsemi) | Standard NPN BJT (no built-in resistor); requires external 4.7 kΩ base resistor; identical SOT23 footprint. | Offers higher IC rating (200 mA) and lower VCE(sat) (300 mV typ.), but increases component count and layout complexity. | Choose when higher current drive or tighter VCE(sat) tolerance is required, and design allows for extra resistor placement. |
Compared with PDTC143TU, PDTC143ET trades thermal performance for smaller size, while MMBT3904LT1G sacrifices integration for higher current capability - making PDTC143TU optimal for space-limited, low-to-medium current digital switching where BOM simplification is prioritized.
Availability
PDTC143TU is available at Aetrix Electronics and suitable for LED indicator control, microcontroller GPIO expansion, and low-power relay driver applications requiring stable component supply and long-term industrial availability.
Supply support for PDTC143TU 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, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.
PDTC143TU belongs to the PDTC143T series of resistor-equipped transistors engineered for digital switching in compact, cost-sensitive electronics - emphasizing BOM reduction and assembly efficiency over raw performance.
FAQ
Is PDTC143TU pin-compatible with standard SOT323 NPN transistors like BC847?
No - PDTC143TU has internal bias resistor R1 connected between pin 1 (base) and input, altering its terminal behavior. While physical pinout matches (1=base, 2=emitter, 3=collector), substituting it for a bare transistor without adjusting surrounding circuitry will cause incorrect biasing or failure to switch.
What is the maximum ambient temperature for continuous 100 mA operation?
At 100 mA IO, power dissipation is ~10 mW (100 mA × 100 mV). With Rth(j-a) = 625 K/W, junction rise is 6.25 °C - allowing continuous operation up to +143.75 °C ambient before reaching Tj = 150 °C limit. However, derating per IEC 60134 recommends limiting ambient to +70 °C for reliability in industrial designs.
Can PDTC143TU be used in linear amplifier mode?
No - it is characterized and qualified only for switching applications. The datasheet specifies no linearity parameters (e.g., fT, noise figure, or hFE variation across IC range), and the integrated R1 prevents stable DC biasing required for analog amplification.
Does PDTC143TU require a flyback diode when driving inductive loads?
Yes - although VCEO = 50 V provides margin, inductive kickback from relays or solenoids can exceed this rating. A standard 1N4148 or BAT54 diode must be placed across the load (cathode to VCC, anode to collector) to clamp voltage spikes and prevent junction breakdown.
PDTC143TU/ZLF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Resistor - Base (R1):
- -
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- Frequency - Transition:
- -
- Power - Max:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
PDTC143TU/ZLF FAQ
1.How can I place an order for PDTC143TU/ZLF through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC143TU/ZLF 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 PDTC143TU/ZLF reliable?
The price and inventory of PDTC143TU/ZLF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC143TU/ZLF is usually 5 days.
3.What payment methods are accepted for PDTC143TU/ZLF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC143TU/ZLF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC143TU/ZLF?
PDTC143TU/ZLF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC143TU/ZLF 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 PDTC143TU/ZLF?
For technical support, including PDTC143TU/ZLF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC143TU/ZLF requirements.
6.How does Aetrix verify that PDTC143TU/ZLF is sourced from the original manufacturer or authorized distributors?
All PDTC143TU/ZLF 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 PDTC143TU/ZLF meets industry standards.
7.What is the process for return or replacement of PDTC143TU/ZLF?
All PDTC143TU/ZLF units undergo pre-shipment inspection (PSI). If there is an issue with PDTC143TU/ZLF, 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 PDTC143TU/ZLF part is unused and in its original packaging.
Return procedure for PDTC143TU/ZLF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTC143TU/ZLF Tags
-
MUN5211T1G
onsemi
-
DTC043ZEBTL
Rohm Semiconductor
-
DTC114EKAT146
Rohm Semiconductor
-
DDTD113ZC-7-F
Diodes Incorporated
-
DRDNB16W-7
Diodes Incorporated
-
PDTC114ET,215
Nexperia USA Inc.
-
PDTC143ZT,215
Nexperia USA Inc.
-
PDTC143ET,215
Nexperia USA Inc.
-
PDTC143XT,215
Nexperia USA Inc.
-
MMUN2211LT1G
onsemi
-
PDTC144ET,215
Nexperia USA Inc.
-
PDTC124ET,215
Nexperia USA Inc.
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