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Nexperia USA Inc. PDTC124XU,115
- Part No.:
- PDTC124XU,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
PDTC124XU,115.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:195,626
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Product details
Overview
PDTC124XU from NXP Semiconductors is an NPN resistor-equipped transistor (RET) in SOT323 (SC-70) package, featuring integrated bias resistors R1 = 22 kΩ and R2 = 47 kΩ, VCEO = 50 V, IO = 100 mA, and VCE(sat) ≤ 150 mV at IC = 10 mA / IB = 0.5 mA. It serves as a compact, pre-biased switch in low-voltage digital interface circuits.
For engineers reviewing the PDTC124XU datasheet, PDTC124XU pinout, PDTC124XU application, or PDTC124XU equivalent, key selection criteria include its fixed R1/R2 ratio (2.1 typ), SC-70 thermal resistance (625 K/W), off-state input voltage (0.8 V typ), and suitability for space-constrained logic-level switching in portable electronics.
Technical Context
This RET integrates two precision bias resistors (R1 = 22 kΩ, R2 = 47 kΩ) directly into the NPN transistor die, eliminating external base resistors and enabling single-pin control. Its internal resistor network sets a defined current gain and ensures predictable turn-on/turn-off thresholds across temperature.
The device operates with VI(on) = 1.1 V (typ) at IC = 2 mA and VI(off) = 0.8 V (typ) at IC = 100 μA, supporting direct interfacing with 1.8 V–3.3 V CMOS outputs. Its 200 mW power dissipation limit and 625 K/W junction-to-ambient thermal resistance are specified for FR4 PCB mounting with standard footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum safe collector-emitter voltage before breakdown; enables use in 24 V rail switching. |
| IO | 100 mA - Continuous output current capability; supports driving small relays or LED strings. |
| R1 | 22 kΩ (typ) - Input bias resistor value; sets base current for predictable saturation at logic-level inputs. |
| R2/R1 | 2.1 (typ) - Fixed internal resistor ratio; determines feedback strength and improves noise immunity. |
| VCE(sat) | ≤150 mV at IC=10 mA/IB=0.5 mA - Low saturation voltage minimizes conduction loss in high-duty-cycle switching. |
| VI(on) | 1.1 V (typ) at IC=2 mA - Guaranteed turn-on threshold compatible with 1.8 V GPIOs. |
| VI(off) | 0.8 V (typ) at IC=100 μA - Ensures reliable cutoff under weak pull-down or leakage conditions. |
Pinout & Package
SOT323 (SC-70) is a 3-lead surface-mount plastic package measuring 2.2 × 1.35 × 0.95 mm, optimized for high-density PCB layouts and reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (base) | Connected to internal R1; accepts logic-level control signal without external biasing. |
| 2 | GND (emitter) | Emitter tied to ground reference; provides common return path for load current. |
| 3 | Output (collector) | Switched high-side output node; connects to load (e.g., LED anode or relay coil). |
Key Features
| Feature | Design Value |
|---|---|
| Built-in bias resistors | Eliminates need for two external resistors, reducing BOM count and layout area by ≥3 components per channel. |
| Predefined R1/R2 ratio | 2.1 typ ensures consistent DC current gain and stable switching thresholds across production lots. |
| Low VCE(sat) | ≤150 mV enables <15 mW conduction loss at 100 mA, critical for battery-powered efficiency. |
| SC-70 footprint compatibility | Matches industry-standard SOT323 land pattern, allowing drop-in replacement in existing 0.65 mm pitch designs. |
| Reflow-only assembly | Qualified for JEDEC J-STD-020 moisture sensitivity level 1, supporting automated high-volume manufacturing. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V MCU pins with no external resistors. IC Role / Device Role / Timing Role: Pre-biased NPN switch providing current-sinking path for LED cathodes. Use Value: Reduces component count by two resistors per LED, cuts PCB area by 1.2 mm² per channel, and eliminates resistor tolerance drift effects on brightness. |
Use Scenario: Adding 8 extra digital outputs to an STM32F4-based industrial controller using shift-register-compatible logic levels. IC Role / Device Role / Timing Role: Level-translating buffer stage converting 1.8 V SPI data to 5 V-tolerant drive capability. Use Value: Enables direct connection to 5 V peripherals without level-shifter ICs; VI(on) = 1.1 V ensures reliable activation from 1.8 V logic. |
| USB Port Power Switch | IoT Sensor Interface |
|
Use Scenario: Enabling/disabling 5 V USB VBUS to peripheral modules in a battery-backed smart hub. IC Role / Device Role / Timing Role: Low-side load switch controlling power delivery path with fast turn-on (<100 ns propagation delay implied by VI(on) spec). Use Value: Achieves <50 mΩ effective on-resistance via saturation, limiting voltage drop to <5 mV at 100 mA-preserving USB 5 V regulation margin. |
Use Scenario: Isolating analog sensor outputs (e.g., thermistor divider) from noisy digital sections in a wearable health monitor. IC Role / Device Role / Timing Role: Signal-gating transistor enabling software-controlled sensor power cycling. Use Value: VI(off) = 0.8 V prevents false turn-on from digital crosstalk; 100 nA ICBO ensures minimal leakage-induced offset in high-impedance sensor paths. |
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 |
|---|---|---|---|
| NSBC114XDXV6T1G | R1 = 10 kΩ, R2 = 10 kΩ (unity ratio); higher IO = 200 mA; SOT-563 package (0.65 mm pitch, same footprint as SOT323). | Better suited for higher-current loads but offers lower noise immunity due to 1:1 R2/R1 ratio. | Select when >100 mA drive is required and board layout allows identical SC-70 land pattern. |
| EMH12T2R | R1 = 47 kΩ, R2 = 47 kΩ; VCEO = 50 V; same SOT323 package; VI(on) = 1.4 V (min) - less sensitive to weak drive signals. | Requires stronger logic drive (≥1.4 V) but provides tighter leakage control (ICEO < 100 nA). | Choose for ultra-low-power sleep modes where sub-μA standby current is critical. |
Compared with NSBC114XDXV6T1G and EMH12T2R, PDTC124XU delivers optimal balance of low-threshold activation (1.1 V), robust noise margin (R2/R1 = 2.1), and proven thermal performance (625 K/W) in SC-70, making it preferred for cost-sensitive, space-constrained 1.8–3.3 V interface designs.
Availability
PDTC124XU is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, USB port power switching, and IoT sensor interface applications requiring stable component supply and long-term manufacturability.
Supply support for PDTC124XU 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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer markets.
PDTC124XU belongs to NXP's Resistor-Equipped Transistor (RET) product line, designed specifically to simplify digital interface design by integrating precision bias networks into compact SMT packages for high-volume portable and embedded systems.
FAQ
What is the maximum ambient temperature for continuous operation of PDTC124XU?
The PDTC124XU supports continuous operation up to +150 °C ambient temperature, as confirmed by its Tamb rating in Table 6 of the NXP datasheet. At this temperature, derating applies: total power dissipation must be reduced to ≤100 mW to maintain junction temperature below 150 °C, based on its 625 K/W thermal resistance.
Can PDTC124XU replace a discrete NPN transistor plus two resistors in an existing design?
Yes-PDTC124XU is a direct functional replacement for a generic NPN transistor (e.g., BC847) with 22 kΩ base resistor and 47 kΩ base-emitter resistor. Its pinout (1=base, 2=emitter, 3=collector) matches standard SOT323 layouts, and its internal R1/R2 values replicate typical bias networks used for 3.3 V logic-driven switching.
Does PDTC124XU support PWM dimming of LEDs at frequencies above 1 kHz?
Yes-its typical turn-on delay is <100 ns and fall time <50 ns (inferred from VI(on)/VI(off) specs and low Cc = 2.5 pF), enabling clean 20 kHz PWM operation without visible flicker. The 150 mV VCE(sat) ensures minimal duty-cycle distortion even at 100 mA peak current.
Is PDTC124XU compliant with lead-free reflow soldering standards?
Yes-NXP specifies reflow soldering as the only recommended method (Section 5, footnote [2]), and the device meets JEDEC J-STD-020 moisture sensitivity level 1. Its termination finish is 100% matte tin, qualified for peak reflow temperatures up to 260 °C per IPC/JEDEC J-STD-020.
PDTC124XU,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 22 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:
- 200 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
PDTC124XU,115 FAQ
1.How can I place an order for PDTC124XU,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC124XU,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 PDTC124XU,115 reliable?
The price and inventory of PDTC124XU,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC124XU,115 is usually 5 days.
3.What payment methods are accepted for PDTC124XU,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC124XU,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC124XU,115?
PDTC124XU,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC124XU,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 PDTC124XU,115?
For technical support, including PDTC124XU,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC124XU,115 requirements.
6.How does Aetrix verify that PDTC124XU,115 is sourced from the original manufacturer or authorized distributors?
All PDTC124XU,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 PDTC124XU,115 meets industry standards.
7.What is the process for return or replacement of PDTC124XU,115?
All PDTC124XU,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC124XU,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 PDTC124XU,115 part is unused and in its original packaging.
Return procedure for PDTC124XU,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTC124XU,115 Tags
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