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NXP Semiconductors PDTA124TK,115
- Part No.:
- PDTA124TK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTA124TK,115.pdf
- Description:
- TRANS PREBIAS PNP 50V 0.1A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:8,326
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Product details
Overview
PDTA124TK from Nexperia is a PNP resistor-equipped transistor with integrated 22 kΩ base bias resistor (R1), open R2 configuration, −50 V VCEO, −100 mA IO, and SOT346 (SC-59) package - used for compact general-purpose switching in interface circuits and logic-level translation.
For engineers reviewing the PDTA124TK datasheet, PDTA124TK pinout, PDTA124TK application, or PDTA124TK equivalent, this page delivers verified package mapping, confirmed pin assignment, thermal limits per mounting condition, DC gain at −1 mA, saturation voltage at −10 mA/−0.5 mA drive, and validated alternatives for PNP RET designs requiring simplified biasing.
Technical Context
This device integrates a single PNP bipolar junction transistor with a monolithically fabricated 22 kΩ base-emitter pull-up resistor (R1) and no second resistor (R2 = open), enabling direct digital input interfacing without external bias components. It operates as a saturated switch under DC conditions with guaranteed hFE ≥ 100 at −1 mA collector current.
Designed for surface-mount assembly using reflow only, the PDTA124TK supports ambient operation from −65 °C to +150 °C, with junction temperature limited to 150 °C and thermal resistance Rth(j-a) = 500 K/W in free air on standard FR4 PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V - maximum allowable collector-emitter voltage before breakdown in open-base configuration |
| IO | −100 mA - maximum continuous DC output current capability without derating |
| R1 | 22 kΩ (15.4–28.6 kΩ range) - integrated base bias resistor enabling single-resistor drive from 3.3 V or 5 V logic |
| hFE | ≥100 at VCE = −5 V, IC = −1 mA - ensures reliable saturation with low base drive current |
| VCEsat | ≤ −150 mV at IC = −10 mA, IB = −0.5 mA - low saturation voltage minimizes power loss in switching mode |
| Ptot | 250 mW at Tamb ≤ 25 °C - total power dissipation limit defining safe operating area on standard PCB layout |
Pinout & Package
Package: SOT346 (SC-59), plastic surface-mounted package with 3 leads; body dimensions 3.1 × 1.7 × 1.3 mm (L × W × H); lead pitch 2.5 mm; JEDEC TO-236 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Connected internally to R1; accepts logic-level input to control transistor conduction |
| 2 | Emitter | Common reference terminal; tied to system ground or negative rail in high-side switch configurations |
| 3 | Collector | Switched output node; sinks current when transistor is ON; connects to load return path |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias resistor | 22 kΩ enables direct connection to 3.3 V/5 V microcontroller GPIO without external components |
| Open R2 configuration | Eliminates need for emitter feedback resistor - simplifies design for basic inverter or level-shifter use |
| SOT346 package | Standardized 3-pin SMD footprint compatible with automated pick-and-place and reflow processes |
| −100 mA IO rating | Supports driving LEDs, small relays, or logic inputs without external amplification stages |
Applications
| LED Driver Circuit | Microcontroller Interface |
|---|---|
Use Scenario: Driving multiple indicator LEDs from a 3.3 V MCU GPIO with current limiting via collector resistor. IC Role / Device Role / Timing Role: PNP switch sinking LED current through collector to ground, controlled by inverted logic signal at base. Use Value: Eliminates discrete base resistor; reduces BOM count and PCB area while maintaining <150 mV saturation drop at 10 mA load. | Use Scenario: Level-shifting 3.3 V logic outputs to interface with 5 V legacy peripherals. IC Role / Device Role / Timing Role: Inverting buffer stage providing voltage translation and current gain between mixed-voltage subsystems. Use Value: Delivers >100 hFE at −1 mA, ensuring robust turn-on margin and noise immunity across temperature range. |
| Relay Driver Stage | Power Rail Enable Switch |
Use Scenario: Controlling 5 V coil relay from low-power MCU output with flyback protection. IC Role / Device Role / Timing Role: High-side switch enabling relay coil energization when base is pulled low. Use Value: With −50 V VCEO, safely clamps inductive kickback; 250 mW power rating accommodates transient surge during de-energization. | Use Scenario: Enabling/disabling auxiliary 3.3 V supply rail based on system state signals. IC Role / Device Role / Timing Role: Low-side enable switch controlling PMOS gate drive or LDO EN pin. Use Value: −100 mA IO supports typical enable currents (<100 µA); open-R2 topology avoids unintended feedback in enable logic paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP resistor-equipped transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PDTC124TK | NPN complement with identical SOT346 package, same R1 value, but opposite polarity and current direction | Used where active-high drive or sourcing (vs sinking) is required; not interchangeable without circuit redesign | Select PDTC124TK only when NPN logic polarity matches system architecture |
| NSV124TKT1G | Onsemi PNP RET with 22 kΩ R1, SOT-23 package, −100 mA IO, but higher VCEsat (≤ −200 mV) and lower Ptot (200 mW) | Compatible for low-current switching but requires layout change due to different footprint and thermal profile | Choose NSV124TKT1G only if SOT-23 footprint is mandated and 50 mW lower power budget is acceptable |
Compared with PDTC124TK and NSV124TKT1G, the PDTA124TK provides optimal balance of polarity-specific switching, standardized SC-59 layout compatibility, and 250 mW thermal headroom - making it preferred for new designs requiring proven reliability in industrial interface modules.
Availability
PDTA124TK is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface modules, relay driver stages, and power rail enable switches requiring stable component supply and long-term production continuity.
Supply support for PDTA124TK 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 PDTA124TK belongs to the PDTA124T series of PNP resistor-equipped transistors designed specifically for reducing component count and simplifying biasing in cost-sensitive consumer, computing, and industrial interface applications.
FAQ
What is the pin configuration of the PDTA124TK?
The PDTA124TK uses SOT346 (SC-59) packaging 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 applies exclusively to the PDTA124TK variant - not shared across other members of the PDTA124T series.
Does the PDTA124TK have an internal R2 resistor?
No, the PDTA124TK has R2 = open as specified in the Quick Reference Data and Characteristics tables. Only R1 (22 kΩ) is integrated; there is no second bias resistor connecting base to emitter, distinguishing it from dual-resistor RET variants like PDTA143 series.
What is the maximum operating temperature for the PDTA124TK?
The PDTA124TK supports an operating ambient temperature range of −65 °C to +150 °C, with a maximum junction temperature of 150 °C. Thermal resistance is 500 K/W in free air, meaning power dissipation must be derated above 25 °C ambient per the published Ptot vs Tamb curve.
Can the PDTA124TK replace a standard PNP transistor like BC807?
The PDTA124TK can replace discrete PNP transistors such as BC807 in switching applications where its integrated 22 kΩ base resistor eliminates the need for an external bias component. However, it is not a drop-in replacement due to differing pinout (BC807 SOT-23 is E-C-B vs PDTA124TK's B-E-C) and fixed bias network - circuit validation is required.
Is the PDTA124TK RoHS compliant and halogen-free?
Yes, the PDTA124TK meets RoHS Directive 2011/65/EU and is halogen-free per Nexperia's product compliance documentation. The device carries the "HF" marking on reel labels and conforms to JEDEC J-STD-020 moisture sensitivity level 1 for reflow soldering.
PDTA124TK,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:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 22 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
PDTA124TK,115 FAQ
1.How can I place an order for PDTA124TK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTA124TK,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 PDTA124TK,115 reliable?
The price and inventory of PDTA124TK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTA124TK,115 is usually 5 days.
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Once your PDTA124TK,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 PDTA124TK,115?
For technical support, including PDTA124TK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTA124TK,115 requirements.
6.How does Aetrix verify that PDTA124TK,115 is sourced from the original manufacturer or authorized distributors?
All PDTA124TK,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 PDTA124TK,115 meets industry standards.
7.What is the process for return or replacement of PDTA124TK,115?
All PDTA124TK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTA124TK,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 PDTA124TK,115 part is unused and in its original packaging.
Return procedure for PDTA124TK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTA124TK,115 Tags
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