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Nexperia USA Inc. PDTC124XT,215
- Part No.:
- PDTC124XT,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTC124XT,215.pdf
- Description:
- TRANS PREBIAS NPN 50V TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:732
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Product details
Overview
PDTC124XT from NXP Semiconductors is an NPN resistor-equipped transistor (RET) in SOT23 package, featuring integrated bias resistors R1 = 22 kΩ and R2/R1 ratio = 2.1, rated for VCEO = 50 V and IO = 100 mA, used for general-purpose switching in digital interface circuits and logic-level translation.
For engineers reviewing the PDTC124XT datasheet, PDTC124XT pinout, PDTC124XT application, or PDTC124XT equivalent, this device serves as a space- and cost-optimized replacement for discrete base-resistor + transistor combinations in low-voltage control paths, level-shifting drivers, and microcontroller I/O buffering where simplified BOM and reduced PCB footprint are critical.
Technical Context
This RET integrates two precision thin-film resistors (R1 = 22 kΩ ±30%, R2/R1 = 2.1 ±21%) directly into the NPN die assembly, eliminating external bias components while maintaining predictable DC current gain (hFE ≥80 at IC = 5 mA) and low saturation voltage (VCEsat ≤150 mV at IC = 10 mA, IB = 0.5 mA).
Its SOT23 (TO-236AB) package supports reflow soldering only, with thermal resistance Rth(j-a) = 500 K/W and junction temperature limit of 150 °C, enabling reliable operation in ambient temperatures from −65 °C to +150 °C under standard FR4 PCB mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V industrial control rails and 3.3/5 V logic interfaces with margin. |
| IO | 100 mA - Continuous output current rating; sufficient for driving LEDs, small relays, and logic gates without external current amplification. |
| R1 | 22 kΩ (typical) - Input bias resistor value; sets base current for predictable turn-on with standard MCU GPIO drive capability. |
| R2/R1 ratio | 2.1 (typical) - Ratio of feedback-to-input resistor; stabilizes operating point against β variation and temperature drift. |
| VCEsat | ≤150 mV at IC = 10 mA - Low saturation voltage minimizes power loss and heat generation in switching applications. |
| hFE | ≥80 at VCE = 5 V, IC = 5 mA - Minimum DC current gain ensures reliable saturation with modest base drive, reducing MCU I/O loading. |
| VI(on) | 1.1 V (typical) - On-state input voltage threshold; compatible with 1.8 V, 3.3 V, and 5 V logic families without level shifters. |
| Ptot | 250 mW at Tamb ≤25 °C - Total power dissipation limit defines safe continuous operation with minimal heatsinking on standard PCBs. |
Pinout & Package
SOT23 (TO-236AB) surface-mount plastic package with 3 leads; 1.3 mm × 2.9 mm × 1.0 mm body dimensions; lead-free and RoHS compliant; reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | input (base) | Connected internally to R1; accepts logic-level input signal to enable transistor conduction. |
| 2 | GND (emitter) | Emitter terminal tied to system ground; provides return path for load current and reference for R1/R2 network. |
| 3 | output (collector) | Switched output node; sinks up to 100 mA to ground when active, suitable for low-side switching of loads. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in bias resistors | Eliminates need for two external resistors, reducing component count by 2 per switch channel and simplifying layout. |
| Reduced pick-and-place cost | Single SMT placement replaces three-part assembly (transistor + two resistors), lowering assembly time and defect risk. |
| Stable DC operating point | R2/R1 = 2.1 ratio provides emitter-feedback biasing that mitigates hFE variation across batches and temperature. |
| Logic-compatible input threshold | VI(on) = 1.1 V (typ) and VI(off) = 0.8 V (typ) ensure clean switching with 1.8 V–5 V CMOS/TTL outputs without hysteresis circuitry. |
| Low saturation loss | VCEsat ≤150 mV at 10 mA enables <1.5 mW conduction loss, supporting thermally constrained designs in dense layouts. |
Applications
| LED Driver Circuit | Microcontroller I/O Buffer |
|---|---|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V GPIO pins in portable instrumentation. IC Role / Device Role / Timing Role: Low-side switch controlling LED cathode connection to ground. Use Value: Integrated R1/R2 eliminates external biasing components, saving 2.5 mm² PCB area and reducing BOM count by one part per LED. |
Use Scenario: Isolating and strengthening weak MCU output signals driving optocoupler inputs in isolated power supply feedback loops. IC Role / Device Role / Timing Role: Digital buffer providing 100 mA sink capability and fast turn-on/turn-off for clean edge transmission. Use Value: VI(on) = 1.1 V ensures full activation from 3.3 V logic, while VCEsat ≤150 mV guarantees optocoupler CTR remains within spec across temperature. |
| Level-Shifting Interface | Relay Driver Stage |
Use Scenario: Translating 1.8 V FPGA I/O signals to 5 V logic levels for legacy peripheral communication. IC Role / Device Role / Timing Role: Active-low level shifter using open-collector configuration with pull-up to 5 V rail. Use Value: R1/R2 network maintains consistent switching thresholds independent of FPGA output impedance, avoiding timing skew. |
Use Scenario: Driving 70 mA coil current in 5 V SPST relay used in HVAC controller output stages. IC Role / Device Role / Timing Role: Final-stage low-side switch interfacing between microcontroller and relay coil. Use Value: 100 mA IO rating and 50 V VCEO provide 2× safety margin over relay coil requirements, ensuring long-term reliability under surge conditions. |
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 |
|---|---|---|---|
| PDTC124XK | SOT346 (SC-59A/TO-236) package; identical R1/R2 values and electrical specs; Ptot = 250 mW same as PDTC124XT. | Larger footprint (2.9 mm × 1.3 mm vs. 2.9 mm × 1.3 mm but different pad layout); less suitable for ultra-dense layouts requiring SOT23's smaller land pattern. | Select when board assembly uses legacy SOT346 tooling or requires higher mechanical robustness in through-hole-compatible SMT process. |
| PDTC124XU | SOT323 (SC-70) package; same R1/R2 and VCEO/IO ratings; Ptot = 200 mW (lower than PDTC124XT's 250 mW). | Smaller body (2.0 mm × 1.25 mm) but lower power handling; thermal resistance Rth(j-a) = 625 K/W limits continuous current in high-ambient environments. | Select only for space-constrained designs with ≤50 mA average load current and ambient <60 °C, where SOT23 thermal margin is unnecessary. |
Compared with PDTC124XK and PDTC124XU, PDTC124XT offers optimal balance of thermal performance (500 K/W), industry-standard SOT23 footprint compatibility, and full 100 mA capability-making it the preferred choice for new designs targeting production scalability and thermal headroom in industrial control and consumer electronics.
Availability
PDTC124XT is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller I/O buffering, and level-shifting interfaces requiring stable component supply and long-term manufacturability.
Supply support for PDTC124XT 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 IoT applications.
PDTC124XT belongs to NXP's Resistor-Equipped Transistor (RET) product line, designed specifically to replace discrete transistor + bias resistor combinations in digital switching and interface applications where BOM reduction and layout simplification are primary design goals.
FAQ
Is PDTC124XT pin-compatible with standard SOT23 NPN transistors?
No. PDTC124XT uses a non-standard SOT23 pinout: Pin 1 = base input, Pin 2 = emitter (GND), Pin 3 = collector output. Standard SOT23 NPN transistors (e.g., BC847) use Pin 1 = emitter, Pin 2 = base, Pin 3 = collector. Direct substitution requires PCB layout revision to match the RET-specific pin mapping.
What is the maximum allowable input voltage at the base terminal?
The absolute maximum input voltage (VI) is +40 V positive and −7 V negative, per Table 6 limiting values. However, normal operation assumes logic-level inputs (≤5 V). Exceeding VI(on) = 1.1 V (typ) or VI(off) = 0.8 V (typ) triggers switching; sustained voltages >10 V may overstress the internal R1 resistor or junction.
Can PDTC124XT be used in linear amplifier mode?
No. PDTC124XT is characterized and qualified exclusively for switching operation. Its integrated R1/R2 network fixes the DC bias point, and parameters like hFE and VCEsat are specified only under saturated switching conditions. Linear operation is not guaranteed, and thermal instability may occur due to lack of external bias adjustment.
Does PDTC124XT require external protection diodes when driving inductive loads?
Yes. When switching relay coils or solenoids, a flyback diode (e.g., 1N4148) must be placed across the load with cathode to VCC and anode to collector (Pin 3). The device lacks internal clamp diodes, and inductive kickback exceeding VCEO = 50 V will cause permanent damage to the collector-base junction.
PDTC124XT,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- 250 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PDTC124XT,215 FAQ
1.How can I place an order for PDTC124XT,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC124XT,215 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 PDTC124XT,215 reliable?
The price and inventory of PDTC124XT,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC124XT,215 is usually 5 days.
3.What payment methods are accepted for PDTC124XT,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC124XT,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC124XT,215?
PDTC124XT,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC124XT,215 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 PDTC124XT,215?
For technical support, including PDTC124XT,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC124XT,215 requirements.
6.How does Aetrix verify that PDTC124XT,215 is sourced from the original manufacturer or authorized distributors?
All PDTC124XT,215 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 PDTC124XT,215 meets industry standards.
7.What is the process for return or replacement of PDTC124XT,215?
All PDTC124XT,215 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC124XT,215, 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 PDTC124XT,215 part is unused and in its original packaging.
Return procedure for PDTC124XT,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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