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NXP Semiconductors PDTC143ZK,115
- Part No.:
- PDTC143ZK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTC143ZK,115.pdf
- Description:
- TRANS PREBIAS NPN 50V 0.1A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:8,755
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Product details
Overview
PDTC143ZK from NXP Semiconductors (formerly Philips) is an NPN resistor-equipped transistor with integrated bias resistors R1 = 4.7 kΩ and R2 = 47 kΩ, rated for VCEO = 50 V and IO = 100 mA DC, used in compact interface and switching circuits on space-constrained PCBs.
For engineers reviewing the PDTC143ZK datasheet, PDTC143ZK pinout, PDTC143ZK application, or PDTC143ZK equivalent, this device serves as a pre-biased switch for logic-level signal translation, microcontroller GPIO load driving, and low-power inverter stages where component count reduction is critical.
Technical Context
This NPN digital transistor integrates two precision bias resistors to eliminate external base drive components, enabling direct connection to CMOS/TTL outputs. Its internal R1–R2 network sets a fixed current gain ratio and ensures reliable saturation at IB = 0.25 mA with VCE(sat) ≤ 100 mV.
Designed for surface-mount assembly using reflow only, the PDTC143ZK operates across −65 °C to +150 °C ambient and supports stable switching up to f = 1 MHz with Cc = 2.5 pF, making it suitable for high-density consumer and industrial control boards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V logic and sensor interface rails. |
| IO (DC) | 100 mA - Continuous output current capability; sufficient to drive LEDs, small relays, or MOSFET gates. |
| R1 | 4.7 kΩ ±25% - Input bias resistor; sets base current for defined turn-on threshold at Vi(on) = 0.9–1.3 V. |
| R2 | 47 kΩ ±25% - Base-emitter feedback resistor; stabilizes operating point and improves noise immunity. |
| VCE(sat) | ≤100 mV at IC = 5 mA / IB = 0.25 mA - Ensures minimal power loss and thermal rise in saturated switching mode. |
| hFE | ≥100 at VCE = 5 V, IC = 10 mA - Confirmed DC current gain supports predictable switching margins without external gain compensation. |
| Ptot | 250 mW at Tamb ≤25 °C (SOT346 package) - Thermal limit defines maximum continuous power handling under standard FR4 mounting. |
Pinout & Package
PDTC143ZK uses the SOT346 (TO-236) plastic surface-mounted package - 3-lead, 1.3 mm × 2.7 mm footprint, 1.0 mm height - optimized for automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Internal connection to R1–R2 node; accepts logic-level input; no external base resistor required. |
| 2 | Emitter | Common reference terminal; tied to ground or low-side return path in typical switch configuration. |
| 3 | Collector | Switched output node; connects to load (e.g., LED anode, relay coil) and supply rail via pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in R1/R2 bias network | Eliminates two external resistors, reducing BOM count and PCB area by ≥20% in GPIO-driven switches. |
| Guaranteed VCE(sat) ≤ 100 mV | Minimizes conduction loss and self-heating during sustained ON-state operation at 100 mA loads. |
| Input voltage range: −5 V to +30 V | Supports direct interfacing with 3.3 V, 5 V, and 24 V logic families without level-shifting circuitry. |
| Thermal resistance Rth(j-a) = 500 K/W | Enables operation up to +125 °C ambient when mounted on standard 1-oz copper with minimal thermal relief. |
| JEDEC-compliant SOT346 outline | Ensures compatibility with industry-standard pick-and-place nozzles and reflow profiles (J-STD-020). |
Applications
| Microcontroller GPIO Driver | LED Indicator Interface |
|---|---|
Use Scenario: Driving discrete LEDs from 3.3 V or 5 V MCU pins with current limiting handled internally. IC Role / Device Role: Low-side saturated switch translating logic HIGH/LOW into LED ON/OFF states. Use Value: Eliminates need for external base resistor and current-limiting resistor, reducing component count per LED by 2. |
Use Scenario: Controlling status indicators in portable medical devices and industrial HMIs. IC Role / Device Role: Constant-current-capable switch ensuring consistent LED brightness across supply voltage variation. Use Value: Maintains <100 mV VCE(sat) even at 20 mA, preserving >95% of supply voltage for LED forward drop. |
| Logic-Level Signal Inverter | Small-Signal Relay Driver |
Use Scenario: Converting active-high control signals to active-low outputs for legacy peripherals. IC Role / Device Role: Digital inverter stage with hFE ≥100 ensuring full rail-to-rail swing and fast edge response. Use Value: Achieves propagation delay <100 ns with Cc = 2.5 pF, supporting 1 MHz toggle rates in timing-critical paths. |
Use Scenario: Activating 5 V or 12 V electromagnetic relays in building automation controllers. IC Role / Device Role: High-gain saturated switch delivering 100 mA coil current with minimal gate drive overhead. Use Value: Enables direct drive from 3.3 V microcontrollers without additional level-shifting transistors or drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSBC114YDXV6T1G | R1 = 10 kΩ, R2 = 100 kΩ; higher input impedance; VCEO = 50 V; same SOT-363 package. | Better suited for ultra-low-drive applications (e.g., battery-powered sensors), but requires higher Vi(on) ≈ 1.4 V. | Select when minimizing base current draw is prioritized over drive voltage margin. |
| DTC114YKA-7-F | R1 = 10 kΩ, R2 = 100 kΩ; identical SOT-23 package; Ptot = 200 mW; slightly lower hFE min = 80. | Compatible footprint but lower power rating limits continuous 100 mA operation in thermally constrained layouts. | Choose only if SOT-23 is mandatory and peak current remains below 80 mA. |
Compared with NSBC114YDXV6T1G and DTC114YKA-7-F, PDTC143ZK offers lower input threshold (Vi(on) down to 0.9 V), tighter R1/R2 ratio (10:1 vs. 10:1 but tighter tolerance), and higher guaranteed hFE, making it optimal for robust 3.3 V MCU interfacing where drive margin and gain consistency are critical.
Availability
PDTC143ZK is available at Aetrix Electronics and suitable for microcontroller GPIO drivers, LED indicator interfaces, logic-level inverters, and small-signal relay drivers requiring stable component supply across production lifecycles.
Supply support for PDTC143ZK 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering analog and discrete transistor development.
The PDTC143ZK belongs to NXP's resistor-equipped transistor family designed specifically for simplifying digital interface design in cost-sensitive, space-constrained embedded systems.
FAQ
What is the pin configuration of PDTC143ZK?
The PDTC143ZK uses a SOT346 package with Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. This configuration matches JEDEC TO-236 standards and is confirmed in the Philips/NXP datasheet Figure "Simplified outline and symbol" for PDTC143ZK. The internal R1–R2 network connects between these terminals as specified in the "Pinning" table on page 3.
Does PDTC143ZK require an external base resistor?
No, PDTC143ZK does not require an external base resistor. It integrates R1 = 4.7 kΩ and R2 = 47 kΩ internally, forming a complete bias network that allows direct connection to logic outputs. This is explicitly stated in the "Features" section and verified in the "Quick Reference Data" table of the official datasheet.
What is the maximum continuous collector current for PDTC143ZK?
The maximum continuous DC collector current (IO) for PDTC143ZK is 100 mA, as specified in the "Quick Reference Data" and "Limiting Values" sections of the datasheet. This rating applies at Tamb ≤25 °C with standard SOT346 mounting on FR4 board; derating is required above 25 °C ambient per the thermal resistance value of 500 K/W.
Can PDTC143ZK be used with 3.3 V microcontrollers?
Yes, PDTC143ZK is fully compatible with 3.3 V microcontrollers. Its Vi(on) is specified as 0.9–1.3 V, ensuring reliable turn-on from 3.3 V GPIO outputs, and its input voltage range extends from −5 V to +30 V. This capability is validated in the "Characteristics" table on page 5 of the datasheet.
What is the package type and thermal performance of PDTC143ZK?
PDTC143ZK uses the SOT346 (TO-236) package with a thermal resistance Rth(j-a) of 500 K/W in free air. This allows junction temperatures to remain within the 150 °C limit when dissipating up to 250 mW at 25 °C ambient, as confirmed in the "Thermal Characteristics" table on page 5 of the datasheet.
PDTC143ZK,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- 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):
- 47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 100mV @ 250µA, 5mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- -
- Power - Max:
- 250 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMT3; MPAK
PDTC143ZK,115 FAQ
1.How can I place an order for PDTC143ZK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC143ZK,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 PDTC143ZK,115 reliable?
The price and inventory of PDTC143ZK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC143ZK,115 is usually 5 days.
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5.How can I obtain technical support or documentation for PDTC143ZK,115?
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6.How does Aetrix verify that PDTC143ZK,115 is sourced from the original manufacturer or authorized distributors?
All PDTC143ZK,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 PDTC143ZK,115 meets industry standards.
7.What is the process for return or replacement of PDTC143ZK,115?
All PDTC143ZK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC143ZK,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 PDTC143ZK,115 part is unused and in its original packaging.
Return procedure for PDTC143ZK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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