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NXP Semiconductors PDTC143ZEF,115
- Part No.:
- PDTC143ZEF,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-89, SOT-490
- Datasheet:
-
PDTC143ZEF,115.pdf
- Description:
- TRANS PREBIAS NPN 50V 0.1A SC89
- Quantity:
- Payment:
- Shipping:
Inventory:6,642
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Product details
Overview
PDTC143ZEF 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, commonly used in low-power switching interfaces and logic-level translation circuits.
For engineers reviewing the PDTC143ZEF datasheet, PDTC143ZEF pinout, PDTC143ZEF application, or PDTC143ZEF equivalent, key selection criteria include its SC-89 (SOT490) package, built-in resistor ratio (R2/R1 ≈ 10), input-on voltage (Vi(on) = 0.9–1.3 V), and thermal resistance (Rth(j-a) = 500 K/W).
Technical Context
The PDTC143ZEF integrates two precision on-chip resistors to form a single-transistor digital switch with current-limiting and level-shifting capability. It operates as a saturated NPN switch with defined turn-on/off thresholds and eliminates external base resistors in microcontroller-driven loads.
Its internal resistor network enables direct connection to 3.3 V or 5 V logic outputs without external biasing, while maintaining guaranteed saturation (VCE(sat) ≤ 100 mV at IC = 5 mA, IB = 0.25 mA) and low leakage (ICEO ≤ 1 µA at VCE = 30 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; supports 24 V industrial logic interfacing. |
| IO (DC) | 100 mA - Continuous output current rating; suitable for driving LEDs, small relays, or gate inputs. |
| R1 | 4.7 kΩ ±25% - Input bias resistor; sets base current for logic-compatible turn-on with 3.3/5 V sources. |
| R2 | 47 kΩ ±25% - Feedback resistor; provides emitter degeneration for stable saturation and noise immunity. |
| Vi(on) | 0.9–1.3 V - Minimum input voltage to achieve IC = 5 mA; ensures reliable activation from standard CMOS/TTL outputs. |
| VCE(sat) | ≤100 mV - Low saturation voltage reduces power loss and self-heating in switching applications. |
| Rth(j-a) | 500 K/W - Thermal resistance in free air; requires minimal PCB copper area for thermal management at full load. |
Pinout & Package
PDTC143ZEF is housed in a plastic surface-mounted SOT490 (SC-89) package measuring 1.7 × 0.95 × 0.5 mm, optimized for high-density PCB layouts and reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Internal connection to R1 and R2 node; accepts logic-level input signal directly. |
| 2 | Emitter | Common emitter terminal; referenced to ground or low-side return path. |
| 3 | Collector | Switched output terminal; connects to load (e.g., LED anode, relay coil, or pull-up network). |
Key Features
| Feature | Design Value |
|---|---|
| Built-in bias resistors | Eliminates two external components per switch, reducing BOM count and layout area in multi-channel interface designs. |
| Guaranteed saturation | VCE(sat) ≤ 100 mV at IC = 5 mA ensures minimal voltage drop and heat generation during active switching. |
| Logic-compatible input threshold | Vi(on) ≤ 1.3 V and Vi(off) ≥ 0.6 V enable robust operation with 3.3 V microcontrollers and noise margins >0.3 V. |
| Low leakage performance | ICEO ≤ 1 µA at 30 V supports battery-powered standby modes with negligible quiescent current drain. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving multiple indicator LEDs from a 3.3 V MCU with limited GPIO drive strength. IC Role / Device Role / Timing Role: Single-transistor current-switching element with integrated biasing. Use Value: Enables direct LED anode switching without external resistors, reducing component count by 2 per channel and simplifying layout. | Use Scenario: Level-shifting and buffering between mixed-voltage subsystems (e.g., 3.3 V MCU to 5 V peripheral). IC Role / Device Role / Timing Role: Digital interface translator with defined input hysteresis and low propagation delay. Use Value: Provides clean 5 V logic-high output from 3.3 V input while limiting peak current to 100 mA for safe peripheral interfacing. |
| Low-Power Inverter | Load Switch for Sensor Modules |
Use Scenario: Implementing compact inverters in space-constrained IoT sensor nodes. IC Role / Device Role / Timing Role: Active-low digital inverter stage with rail-to-rail output swing. Use Value: Delivers true logic inversion using only one device and no passive components, minimizing footprint and parasitic capacitance. | Use Scenario: Enabling/disabling power to analog sensor modules during sleep cycles. IC Role / Device Role / Timing Role: High-side or low-side load switch controlled by MCU GPIO. Use Value: Achieves <1 µA off-state leakage and <100 mV on-state drop, extending battery life and preserving signal integrity. |
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 |
|---|---|---|---|
| PDTC143ZK | SOT346 (SC-59) package; larger footprint (2.7 × 1.3 mm) and higher Ptot (250 mW vs. 250 mW same rating but better thermal coupling). | Preferred where manual rework or legacy through-hole compatibility is required; less suitable for ultra-dense layouts. | Select PDTC143ZK when board assembly includes mixed SMT/legacy processes or thermal margin above 500 K/W is needed. |
| MMBT3904LT1G | Discrete NPN BJT without built-in resistors; requires two external bias resistors; hFE = 100–300 (vs. fixed gain behavior of PDTC143ZEF). | Used where adjustable gain or variable switching thresholds are required; not drop-in compatible due to external component dependency. | Choose MMBT3904LT1G only when design flexibility in biasing or higher hFE tolerance is critical; adds BOM and layout complexity. |
Compared with PDTC143ZEF, PDTC143ZK offers identical electrical specs in a more serviceable package, while MMBT3904LT1G provides design flexibility at the cost of added components and tuning effort-neither is pin-compatible, but both serve overlapping low-current switching roles.
Availability
PDTC143ZEF is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, low-power inverters, and sensor module load switching requiring stable component supply across industrial and consumer electronics programs.
Supply support for PDTC143ZEF 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 company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions and high-performance mixed-signal ICs.
The PDTC143ZEF belongs to NXP's resistor-equipped transistor family designed specifically for simplified digital interface and low-power switching applications in space-constrained, cost-sensitive electronics.
FAQ
What is the maximum continuous collector current rating for PDTC143ZEF?
The PDTC143ZEF has a maximum DC output current (IO) rating of 100 mA, verified under ambient temperature ≤25 °C with SOT490 package mounting per standard reflow conditions. This rating applies to steady-state switching loads such as LEDs or logic buffers, and must be derated above 25 °C ambient per the device's thermal resistance of 500 K/W.
Does PDTC143ZEF require external base resistors for operation with 3.3 V logic?
No, PDTC143ZEF does not require external base resistors because it integrates R1 = 4.7 kΩ and R2 = 47 kΩ internally. Its Vi(on) range (0.9–1.3 V) ensures reliable turn-on from 3.3 V logic outputs, and the built-in resistor network provides automatic current limiting and saturation control-eliminating two discrete components per switch in PDTC143ZEF-based designs.
What is the pin configuration of PDTC143ZEF in the SOT490 package?
The PDTC143ZEF uses a standardized 3-pin SOT490 (SC-89) pinout: Pin 1 is Base (internal node of R1/R2), Pin 2 is Emitter (common reference terminal), and Pin 3 is Collector (switched output). This configuration is confirmed in the Philips datasheet Figure "SIMPLIFIED OUTLINE, SYMBOL AND PINNING" and matches the mechanical outline drawing for SOT490 on page 12.
Can PDTC143ZEF be used in high-frequency switching applications?
The PDTC143ZEF is not optimized for high-frequency switching: its collector capacitance (Cc) is specified at 2.5 pF, and no switching time data (ton/toff) is provided in the datasheet. It is intended for DC and low-speed digital switching (≤100 kHz), such as LED control, GPIO buffering, and power sequencing-not RF or PWM motor drive applications.
What is the storage temperature range for PDTC143ZEF?
The PDTC143ZEF has a specified storage temperature range of −65 °C to +150 °C, as defined in the Absolute Maximum Ratings table (page 4 of the datasheet). This wide range supports long-term warehouse storage, automotive under-hood environments, and industrial equipment operating in extreme ambient conditions without degradation of bias resistor stability or junction integrity.
PDTC143ZEF,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-89, SOT-490
- 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:
- SC-89
PDTC143ZEF,115 FAQ
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5.How can I obtain technical support or documentation for PDTC143ZEF,115?
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6.How does Aetrix verify that PDTC143ZEF,115 is sourced from the original manufacturer or authorized distributors?
All PDTC143ZEF,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 PDTC143ZEF,115 meets industry standards.
7.What is the process for return or replacement of PDTC143ZEF,115?
All PDTC143ZEF,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC143ZEF,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 PDTC143ZEF,115 part is unused and in its original packaging.
Return procedure for PDTC143ZEF,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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