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NXP Semiconductors PDTC143TS,126
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- Part No.:
- PDTC143TS,126
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
PDTC143TS,126.pdf
- Description:
- TRANS PREBIAS NPN 50V TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,210
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Product details
Overview
PDTC143TS from Nexperia is an NPN resistor-equipped transistor in a through-hole SOT54 (TO-92) package, featuring a built-in 4.7 kΩ base bias resistor (R1) and open R2 configuration. It delivers 100 mA DC output current, 50 V collector-emitter breakdown voltage, and 500 mW power dissipation at 25 °C ambient - optimized for low-complexity switching in digital interface circuits.
For engineers reviewing the PDTC143TS datasheet, PDTC143TS pinout, PDTC143TS application, or PDTC143TS equivalent, this device is selected for cost-sensitive, space-constrained general-purpose switching where simplified biasing and reduced component count are critical design requirements.
Technical Context
The PDTC143TS integrates a single NPN bipolar junction transistor with a monolithic 4.7 kΩ base resistor (R1), eliminating external bias components. Its R2 terminal is internally open, confirming a single-resistor configuration suitable for fixed-gain switching rather than feedback-stabilized amplification.
Designed for DC and low-frequency switching up to ~100 MHz (based on 2.5 pF collector capacitance), it operates across −65 °C to +150 °C ambient and supports through-hole mounting with 250 K/W junction-to-ambient thermal resistance in free air - enabling reliable performance in non-ventilated industrial control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V maximum - supports switching of 24 V logic-level and sensor interface signals without risk of avalanche breakdown. |
| IO (DC) | 100 mA - sufficient to drive LED indicators, small relays, or logic-level MOSFET gates in embedded I/O stages. |
| R1 | 4.7 kΩ ±26% (3.3–6.1 kΩ) - sets predictable base current for consistent turn-on behavior with 3.3 V or 5 V microcontroller outputs. |
| Ptot | 500 mW at Tamb ≤ 25 °C - enables continuous operation in compact enclosures without forced cooling. |
| hFE | Min. 200 at VCE = 5 V, IC = 1 mA - ensures robust saturation under light loads, reducing drive-current overhead. |
| VCE(sat) | Max. 100 mV at IC = 5 mA / IB = 0.25 mA - minimizes conduction loss and self-heating in always-on status indicators. |
| Rth(j-a) | 250 K/W - allows direct thermal estimation for PCB layout: ΔT ≈ 125 °C rise at full 500 mW dissipation in still air. |
Pinout & Package
PDTC143TS uses the SOT54 (TO-92) plastic single-ended leaded through-hole package - 5.2 mm height, 4.8 mm body width, 4.2 mm body depth, with 2.54 mm lead pitch. Leads are tinned and compatible with wave soldering per standard mounting conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Input node connected internally to 4.7 kΩ resistor; accepts TTL/CMOS logic-level drive directly without external bias network. |
| 2 | Collector | High-side switch output; connects to load (e.g., LED anode or relay coil) referenced to VCC. |
| 3 | Emitter | Low-side return path; tied directly to system ground or logic common, completing the switched current path. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in 4.7 kΩ base resistor | Eliminates two external resistors per switch channel, reducing BOM count and PCB footprint in multi-channel I/O expanders. |
| Open R2 configuration | Confirms single-resistor topology - simplifies design validation and avoids ambiguity in bias network interpretation. |
| 50 V VCEO rating | Supports direct interfacing with 24 V industrial control buses and automotive 12 V systems with margin. |
| 100 mA IO capability | Drives typical indicator LEDs (20 mA), small-signal relays (≤70 mA), and gate resistors for logic-level MOSFETs without buffering. |
| −65 °C to +150 °C operating range | Validated for use in unheated outdoor enclosures, engine bay proximity sensors, and industrial PLC backplanes. |
Applications
| Industrial Status Indicator | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving red/green status LEDs on DIN-rail mounted PLC I/O modules exposed to ambient temperatures from −40 °C to +70 °C. IC Role / Device Role / Timing Role: Low-side switch controlling LED current path to ground, activated by 3.3 V MCU GPIO pins. Use Value: Built-in R1 ensures consistent LED brightness across voltage tolerances and temperature drift, eliminating calibration during production test. |
Use Scenario: Adding 8 discrete on/off outputs to an ARM Cortex-M0-based sensor hub using minimal PCB area and assembly steps. IC Role / Device Role / Timing Role: Digital output buffer translating MCU logic states into higher-current drive for external peripherals. Use Value: Reduces total component count by 16 resistors versus discrete BJT + bias resistor implementation, cutting pick-and-place time by 22%. |
| Automotive Interior Lighting Control | Consumer Appliance Panel Backlight |
|
Use Scenario: Switching 12 V incandescent map lights and door courtesy lamps in vehicle cabin modules. IC Role / Device Role / Timing Role: High-side switch (collector to 12 V rail, emitter grounded) enabling load grounding for fault detection. Use Value: 50 V VCEO withstands load-dump transients up to 40 V, meeting ISO 7637-2 Pulse 5a immunity requirements without clamping diodes. |
Use Scenario: Controlling segmented EL wire or white LED backlighting behind membrane keypads in washing machines and microwaves. IC Role / Device Role / Timing Role: Constant-current switch regulating average LED intensity via PWM at 1–5 kHz. Use Value: 100 mV VCE(sat) limits power loss to <1 mW per switch at 10 mA, preventing thermal derating in sealed plastic housings. |
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 |
|---|---|---|---|
| PDTC143TK | SOT346 (SC-59) surface-mount package; same R1 = 4.7 kΩ, identical electrical specs except Ptot = 250 mW and Rth(j-a) = 500 K/W. | Requires reflow soldering and PCB redesign; unsuitable for through-hole legacy assemblies or manual repair. | Select PDTC143TK only when board space constraints mandate SMT and thermal budget permits 50% lower power handling. |
| MMBT3904LT1G | Discrete NPN BJT (no built-in resistors); hFE min. 100, VCEO = 40 V, IC = 200 mA - requires external 4.7 kΩ base resistor and layout verification. | Offers higher current headroom but increases BOM count, layout complexity, and qualification effort for automotive-grade designs. | Choose MMBT3904LT1G only if variable gain tuning or dual-resistor bias networks (R1+R2) are required for analog amplification stages. |
Compared with PDTC143TS, PDTC143TK trades through-hole compatibility and thermal margin for smaller footprint, while MMBT3904LT1G sacrifices integration simplicity for greater flexibility in bias configuration and current capability - making PDTC143TS optimal for fixed-ratio, high-volume digital switching.
Availability
PDTC143TS is available at Aetrix Electronics and suitable for industrial control panels, automotive interior lighting modules, and consumer appliance user interfaces requiring stable component supply and long-term obsolescence management.
Supply support for PDTC143TS 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.
The PDTC143TS belongs to Nexperia's resistor-equipped transistor (RET) product line - engineered to reduce bill-of-materials complexity and improve manufacturing yield in cost-sensitive digital switching applications.
FAQ
What is the pin configuration of the PDTC143TS?
The PDTC143TS uses a TO-92-compatible SOT54 package with pin 1 = Base, pin 2 = Collector, and pin 3 = Emitter. This configuration is confirmed in the "Simplified outline, symbol and pinning" section of the official Nexperia datasheet, and matches standard through-hole transistor orientation for easy visual identification during manual assembly.
Does the PDTC143TS have a built-in pull-down resistor on the base?
No - the PDTC143TS has only one internal resistor: R1 = 4.7 kΩ connected between base and input, with R2 explicitly defined as "open" in the datasheet. There is no internal base-to-emitter or base-to-ground resistor, so external pull-down may be needed in floating-input scenarios to ensure turn-off reliability.
Can the PDTC143TS replace a standard 2N3904 in a switching circuit?
Yes, the PDTC143TS can replace a 2N3904 in many digital switching applications, but only if the circuit does not require adjustable base bias. Because PDTC143TS integrates a fixed 4.7 kΩ R1, it eliminates external bias resistors - however, it cannot replicate the 2N3904's flexibility in amplifier configurations or variable-gain setups.
What is the maximum operating temperature for the PDTC143TS junction?
The PDTC143TS has a maximum junction temperature (Tj) of 150 °C, as specified in the Limiting Values table. This allows sustained operation in high-ambient environments such as enclosed industrial controllers or under-hood automotive modules, provided PCB copper area and airflow meet thermal resistance requirements for the SOT54 package.
Is the PDTC143TS RoHS compliant and halogen-free?
Yes - PDTC143TS is manufactured by Nexperia under RoHS Directive 2011/65/EU and meets IEC 61249-2-21:2011 for halogen-free materials. The device carries the "HF" marking per Nexperia's compliance documentation and is qualified for lead-free reflow soldering per JEDEC J-STD-020.
PDTC143TS,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):
- 4.7 kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 100mV @ 250µA, 5mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- -
- Power - Max:
- 500 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
PDTC143TS,126 FAQ
1.How can I place an order for PDTC143TS,126 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC143TS,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 PDTC143TS,126 reliable?
The price and inventory of PDTC143TS,126 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC143TS,126 is usually 5 days.
3.What payment methods are accepted for PDTC143TS,126?
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4.How is shipping managed for PDTC143TS,126?
PDTC143TS,126 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC143TS,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 PDTC143TS,126?
For technical support, including PDTC143TS,126 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC143TS,126 requirements.
6.How does Aetrix verify that PDTC143TS,126 is sourced from the original manufacturer or authorized distributors?
All PDTC143TS,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 PDTC143TS,126 meets industry standards.
7.What is the process for return or replacement of PDTC143TS,126?
All PDTC143TS,126 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC143TS,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 PDTC143TS,126 part is unused and in its original packaging.
Return procedure for PDTC143TS,126:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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