My Inquiry
My Account
NXP Semiconductors PDTC144TK,115
- Part No.:
- PDTC144TK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTC144TK,115.pdf
- Description:
- TRANS PREBIAS NPN 50V 0.1A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:7,155
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PDTC144TK,115 from Nexperia is an NPN resistor-equipped transistor with integrated 47 kΩ base bias resistor (R1), open R2 configuration, 50 V VCEO, 100 mA IO, and SOT346 (SC-59) package - used for compact DC switching in interface and driver circuits.
For engineers reviewing the PDTC144TK,115 datasheet, PDTC144TK,115 pinout, PDTC144TK,115 application, or PDTC144TK,115 equivalent, key selection factors include its built-in bias network, 3-pin SOT346 footprint, guaranteed hFE ≥100 at 1 mA, low VCEsat ≤150 mV, and suitability for space-constrained logic-level switching.
Technical Context
The PDTC144TK,115 integrates a single NPN bipolar junction transistor with a precision 47 kΩ input resistor (R1) connected between base and emitter; R2 is omitted (open), simplifying biasing for digital input-driven switching. It operates as a saturated switch rather than a linear amplifier.
Its thermal resistance Rth(j-a) is 500 K/W in free air, and it supports reflow soldering only per JEDEC J-STD-020. Junction temperature is rated to 150 °C, with storage range from −65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - maximum collector-emitter voltage before breakdown; enables use in 24 V and lower DC systems. |
| IO | 100 mA - continuous DC output current capability; sufficient for LED drivers, small relays, and logic buffers. |
| R1 | 47 kΩ ±26% - integrated base bias resistor; eliminates external component, reduces BOM count and layout area. |
| hFE | ≥100 at VCE = 5 V, IC = 1 mA - ensures reliable saturation with low drive current (e.g., 10 µA base current yields ≥1 mA collector current). |
| VCEsat | ≤150 mV at IC = 10 mA, IB = 0.5 mA - minimizes power loss and self-heating during on-state operation. |
| Ptot | 250 mW at Tamb ≤ 25 °C - defines maximum steady-state power dissipation in standard SOT346 mounting. |
Pinout & Package
SOT346 (SC-59) plastic surface-mounted package: 3-lead, 1.7 mm × 1.3 mm × 0.95 mm body, gull-wing leads, JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Input node connected internally to R1; accepts TTL/CMOS logic-level drive without external resistor. |
| 2 | Emitter | Common reference terminal; tied to ground or low-side return path in typical switch configurations. |
| 3 | Collector | Output node; sinks load current when base is driven high; connects to positive rail via load (e.g., LED, relay coil). |
Key Features
| Feature | Design Value |
|---|---|
| Built-in 47 kΩ base resistor | Reduces external component count by one resistor per switch channel; eliminates resistor placement and solder joint risk. |
| Guaranteed hFE ≥100 | Ensures consistent saturation across process and temperature; supports reliable low-drive switching down to 0.5 mA base current. |
| Low VCEsat ≤150 mV | Minimizes conduction loss and thermal rise in battery-powered or thermally constrained applications. |
| SOT346 package compatibility | Enables high-density PCB layouts; compatible with standard SOT-23 reflow profiles and automated assembly equipment. |
Applications
| LED Driver Circuit | Microcontroller GPIO Interface |
|---|---|
Use Scenario: Driving indicator LEDs from 3.3 V or 5 V microcontroller outputs. IC Role / Device Role / Timing Role: Low-side saturated switch controlling LED current path to ground. Use Value: Eliminates need for discrete base resistor; enables direct connection to MCU pins with no additional passives. |
Use Scenario: Level-shifting and buffering between 3.3 V logic and 5 V peripheral enable lines. IC Role / Device Role / Timing Role: Digital signal translator providing current gain and voltage isolation. Use Value: Ensures clean, fast turn-on/turn-off with <150 mV saturation drop, preserving noise margin. |
| Relay Coil Driver | Logic Inverter Stage |
Use Scenario: Switching 12 V relay coils in industrial control modules. IC Role / Device Role / Timing Role: High-gain NPN switch sinking coil current to ground upon logic-high input. Use Value: Delivers 100 mA output with guaranteed hFE ≥100, enabling robust coil activation even at elevated temperatures. |
Use Scenario: Creating non-inverting or inverting logic stages in discrete gate-based systems. IC Role / Device Role / Timing Role: Active pull-down element in open-collector or wired-OR configurations. Use Value: Provides predictable switching threshold and fast edge response due to fixed R1 bias network. |
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 | SOT416 (SC-75) package; smaller 1.25 mm × 0.8 mm footprint; Ptot = 150 mW vs. 250 mW. | Lower power handling; suited for ultra-dense portable designs where thermal budget is tight. | Select PDTC144ET,115 only if board space is critical and load current remains ≤60 mA. |
| PDTC144TT,115 | SOT23 package; identical electrical specs but larger 3.0 mm × 1.4 mm body; Ptot = 250 mW. | Higher thermal mass and easier manual rework; compatible with legacy SOT-23 footprints. | Choose PDTC144TT,115 when upgrading from older SOT-23 designs or requiring higher mechanical robustness. |
Compared with PDTC144TK,115, PDTC144ET,115 trades thermal capacity for miniaturization, while PDTC144TT,115 retains full power rating in a more serviceable package - both require PCB layout changes due to differing land patterns.
Availability
PDTC144TK,115 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface modules, and relay control systems requiring stable component supply and long-term industrial availability.
Supply support for PDTC144TK,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 is a global leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division.
The PDTC144TK,115 belongs to Nexperia's resistor-equipped transistor (RET) product line, engineered for simplified digital switching in automotive, industrial, and consumer electronics.
FAQ
What is the pin configuration of PDTC144TK,115?
The PDTC144TK,115 uses SOT346 package with pin 1 = Base, pin 2 = Emitter, pin 3 = Collector. This arrangement is confirmed in the official Nexperia datasheet Figure 3 "Simplified outline, symbol and pinning" and matches SC-59 mechanical standard. The internal R1 resistor connects pin 1 to pin 2.
Does PDTC144TK,115 have a built-in pull-down resistor?
No - PDTC144TK,115 has only R1 = 47 kΩ between base and emitter (pin 1 to pin 2); R2 is explicitly open. It does not include a base-emitter pull-down resistor, so external leakage paths or floating inputs must be managed in system design.
What is the maximum operating temperature for PDTC144TK,115?
The PDTC144TK,115 has a maximum junction temperature (Tj) of 150 °C and an operating ambient temperature range of −65 °C to +150 °C. Its thermal resistance Rth(j-a) is 500 K/W in free air, meaning power dissipation must be derated above 25 °C ambient.
Can PDTC144TK,115 replace a standard 2N3904 with external bias resistors?
Yes - PDTC144TK,115 can replace a 2N3904 plus base resistor in low-speed switching applications, provided the 47 kΩ R1 value meets drive requirements and the 100 mA IO limit suffices. However, it lacks the 2N3904's linear gain consistency and is optimized for saturation, not amplification.
Is PDTC144TK,115 RoHS compliant and halogen-free?
Yes - PDTC144TK,115 complies with RoHS Directive 2011/65/EU and is halogen-free per Nexperia's material declarations. The device carries the "115" suffix indicating lead-free, green (halogen-free) packaging per industry-standard marking convention.
PDTC144TK,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):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1mA, 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
PDTC144TK,115 FAQ
1.How can I place an order for PDTC144TK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC144TK,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 PDTC144TK,115 reliable?
The price and inventory of PDTC144TK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC144TK,115 is usually 5 days.
3.What payment methods are accepted for PDTC144TK,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC144TK,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC144TK,115?
PDTC144TK,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC144TK,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 PDTC144TK,115?
For technical support, including PDTC144TK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC144TK,115 requirements.
6.How does Aetrix verify that PDTC144TK,115 is sourced from the original manufacturer or authorized distributors?
All PDTC144TK,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 PDTC144TK,115 meets industry standards.
7.What is the process for return or replacement of PDTC144TK,115?
All PDTC144TK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC144TK,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 PDTC144TK,115 part is unused and in its original packaging.
Return procedure for PDTC144TK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTC144TK,115 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.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
