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NXP Semiconductors PDTC144EK,115
- Part No.:
- PDTC144EK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTC144EK,115.pdf
- Description:
- TRANS PREBIAS NPN 50V 0.1A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:9,021
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Product details
Overview
PDTC144EK,115 from Nexperia (formerly Philips Semiconductors) is an NPN resistor-equipped transistor with integrated 47 kΩ base bias resistors (R1 and R2), rated for 50 V VCEO, 100 mA DC output current, and housed in SOT346 (SC-59) surface-mount package. It functions as a single-transistor switch in digital interface and level-shifting circuits where simplified drive and reduced external component count are required.
For engineers reviewing the PDTC144EK,115 datasheet, PDTC144EK,115 pinout, PDTC144EK,115 application, or PDTC144EK,115 equivalent, key selection criteria include its built-in bias network, 50 V breakdown rating, 100 mA switching capability, SOT346 thermal performance (500 K/W Rth(j-a)), and compatibility with reflow-only assembly per JEDEC J-STD-020.
Technical Context
The PDTC144EK,115 integrates two precision-matched 47 kΩ resistors (R1 = base-to-VIN, R2 = base-to-emitter) to configure a fixed-current-driven NPN switch, eliminating external bias components. Its 50 V VCEO and 10 V VEBO ratings support operation across 3.3 V, 5 V, and 12 V logic domains.
Designed for high-volume surface-mount applications, it uses standard SOT346 footprint (3.1 × 1.7 × 1.3 mm), supports only reflow soldering per datasheet Note 2, and delivers 250 mW power dissipation at Tamb ≤25 °C with 500 K/W junction-to-ambient thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Enables safe switching of 24 V industrial control signals without risk of collector-emitter breakdown. |
| IO (DC) | 100 mA - Supports driving LED indicators, small relays, or logic-level MOSFET gates directly. |
| R1 / R2 | 47 kΩ ±28% - Provides consistent base bias for predictable turn-on at ~0.5 mA input drive with 3.3–5 V logic. |
| Vi(on) | 1.6 V (typ.) - Ensures reliable activation from low-voltage CMOS outputs (e.g., 1.8 V/3.3 V microcontrollers). |
| VCE(sat) | 150 mV (max.) - Minimizes conduction loss and self-heating during sustained on-state operation. |
| Rth(j-a) | 500 K/W - Requires minimal PCB copper area for thermal management in compact consumer electronics layouts. |
| Ptot | 250 mW - Limits continuous power handling to avoid junction temperature exceedance at ambient ≤25 °C. |
Pinout & Package
PDTC144EK,115 is supplied in the SOT346 (TO-236, SC-59) plastic surface-mounted package measuring 3.1 × 1.7 × 1.3 mm, optimized for automated pick-and-place and reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Input node connected internally to R1 (47 kΩ) and R2 (47 kΩ); accepts logic-level voltage for switch control. |
| 2 | Emitter | Common reference terminal tied to system ground or low-side load return path. |
| 3 | Collector | Switched output node connected to load (e.g., LED anode, relay coil, MOSFET gate) and supply rail. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual bias resistors | Eliminates need for two external 47 kΩ resistors, reducing BOM count and PCB real estate by ≥3 components. |
| Reflow-only assembly compliance | Guarantees mechanical and electrical reliability when processed per JEDEC J-STD-020 profile-no hand-soldering or wave soldering. |
| Low VCE(sat) at 100 mA | 150 mV max ensures <15 mW conduction loss, critical for battery-powered sensor nodes and portable devices. |
| Wide Vi(on)/Vi(off) separation | 1.6 V typical turn-on vs. 0.8 V typical turn-off enables robust noise margin (>0.5 V) against EMI in automotive body electronics. |
| JEDEC-standard SOT346 footprint | Ensures drop-in compatibility with existing pick-and-place nozzles and stencil apertures used for TO-236 packages. |
Applications
| LED Indicator Driver | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving status LEDs on a USB-C power delivery controller board operating from 5 V rail. IC Role / Device Role / Timing Role: Low-side switch controlling LED anode current with logic-level enable from MCU GPIO. Use Value: Built-in 47 kΩ bias resistors allow direct connection to 3.3 V GPIO without external pull-up/down, saving 2 passives and 2 placement steps. | Use Scenario: Adding discrete I/O capability to an STM32-based motor control board with limited GPIO availability. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer between 3.3 V MCU output and 12 V solenoid driver input. Use Value: 50 V VCEO rating safely isolates MCU from 12 V load transients while 100 mA output drives optocoupler inputs or small signal relays. |
| Logic-Level Inverter | RS-232 Line Receiver Interface |
Use Scenario: Inverting TTL-level signals in a legacy industrial PLC backplane where space constraints prohibit discrete resistor networks. IC Role / Device Role / Timing Role: Active-low inverter stage converting 5 V logic HIGH to LOW output for enable/disable control of downstream peripherals. Use Value: 150 mV VCE(sat) ensures clean LOW-level output (<0.2 V) compatible with 74HC-series inputs, avoiding marginal logic thresholds. | Use Scenario: Converting RS-232 receiver output (±12 V swing) to 3.3 V logic levels for UART input on an IoT gateway SoC. IC Role / Device Role / Timing Role: Clamped input stage limiting negative excursions via internal R2 path and providing current-limited 3.3 V-compatible output. Use Value: 10 V VEBO rating withstands RS-232 negative pulses without damage, while 1.6 V Vi(on) ensures fast response to valid logic transitions. |
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 |
|---|---|---|---|
| PDTC144ET,115 | SOT23 package (smaller 2.9 × 1.3 × 1.0 mm), same R1/R2 values and electrical specs, but lower Ptot (250 mW) and higher Rth(j-a) (500 K/W). | Better suited for ultra-dense portable PCBs where footprint is constrained but thermal load remains light. | Select PDTC144ET,115 only if board layout requires SOT23 footprint and peak current stays below 50 mA average. |
| PDTC144EU,115 | SOT323 package (2.2 × 1.35 × 1.15 mm), identical bias resistors and voltage ratings, but reduced Ptot (200 mW) and higher thermal resistance (625 K/W). | Targeted at space-constrained RF modules or wearables where minimal height (1.15 mm) is prioritized over power handling. | Choose PDTC144EU,115 only when board stack height is critical and ambient temperature remains ≤40 °C with derated current. |
Compared with PDTC144EK,115, the SOT23 and SOT323 alternatives offer smaller footprints but sacrifice thermal margin and maximum continuous current capability-PDTC144EK,115 remains optimal for general-purpose industrial and automotive interface designs requiring balanced size, power, and manufacturability.
Availability
PDTC144EK,115 is available at Aetrix Electronics and suitable for LED indicator drivers, microcontroller GPIO expanders, logic-level inverters, and RS-232 line receiver interfaces requiring stable component supply across production lifecycles.
Supply support for PDTC144EK,115 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, formerly Philips Semiconductors, is a global leader in high-volume production of discrete semiconductors and logic ICs, headquartered in Nijmegen, Netherlands.
The PDTC144E series was designed specifically for cost-sensitive, high-reliability digital interface applications in consumer, industrial, and automotive electronics-emphasizing integration, assembly simplicity, and JEDEC-compliant manufacturability.
FAQ
What is the exact pin configuration of PDTC144EK,115?
The PDTC144EK,115 uses SOT346 package with Pin 1 = Base, Pin 2 = Emiiter, Pin 3 = Collector. This matches the "SOT346" row in the Simplified Outline table on page 3 of the 2004 datasheet, confirming base-input/emitter-return/collector-output topology for low-side switching.
Does PDTC144EK,115 support wave soldering?
No. The PDTC144EK,115 datasheet explicitly states in Limiting Values Note 2: "Reflow soldering is the only recommended soldering method." Wave soldering may damage internal resistor elements or delaminate the SOT346 mold compound due to thermal stress.
What is the guaranteed minimum hFE for PDTC144EK,115 at 5 mA collector current?
The PDTC144EK,115 has a minimum DC current gain (hFE) of 80 at VCE = 5 V and IC = 5 mA, as specified in the Characteristics table on page 5. This value applies across the full operating temperature range and ensures predictable switching behavior in buffered logic interfaces.
Can PDTC144EK,115 replace a standard 2N3904 transistor in a circuit?
PDTC144EK,115 cannot serve as a direct functional replacement for a 2N3904 because it includes integrated 47 kΩ bias resistors and lacks independent base access. It is intended only for resistor-equipped transistor applications-not general-purpose amplifier or switch designs requiring external bias networks.
What is the maximum allowable input voltage applied to the base pin of PDTC144EK,115?
The PDTC144EK,115 specifies a maximum positive input voltage (VI) of +40 V and a maximum negative input voltage of −10 V, per the Limiting Values table on page 4. Exceeding these values risks permanent damage to the internal R1/R2 network or junction integrity.
PDTC144EK,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):
- 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:
- 250 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMT3; MPAK
PDTC144EK,115 FAQ
1.How can I place an order for PDTC144EK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC144EK,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 PDTC144EK,115 reliable?
The price and inventory of PDTC144EK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC144EK,115 is usually 5 days.
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PDTC144EK,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC144EK,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 PDTC144EK,115?
For technical support, including PDTC144EK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC144EK,115 requirements.
6.How does Aetrix verify that PDTC144EK,115 is sourced from the original manufacturer or authorized distributors?
All PDTC144EK,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 PDTC144EK,115 meets industry standards.
7.What is the process for return or replacement of PDTC144EK,115?
All PDTC144EK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC144EK,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 PDTC144EK,115 part is unused and in its original packaging.
Return procedure for PDTC144EK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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