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NXP Semiconductors PDTB123TK,115
- Part No.:
- PDTB123TK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTB123TK,115.pdf
- Description:
- TRANS PREBIAS PNP 50V 0.5A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:7,585
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Product details
Overview
PDTB123TK from NXP Semiconductors is a PNP resistor-equipped transistor (RET) in SOT346 (SC-59A/TO-236) package, designed for digital switching with −50 V VCEO, −500 mA IO, and built-in 2.2 kΩ input bias resistor (R1); used in automotive and industrial load control circuits where simplified base drive and reduced component count are required.
For engineers reviewing the PDTB123TK datasheet, PDTB123TK pinout, PDTB123TK application, or PDTB123TK equivalent, this part serves as a cost-optimized, surface-mount alternative to BC807-series transistors in digital logic interfacing, IC input conditioning, and low-power load switching-requiring verification of PNP polarity, open-emitter configuration, and thermal derating on FR4 PCBs.
Technical Context
The PDTB123TK integrates a single PNP bipolar junction transistor with an internal 2.2 kΩ base-input resistor (R1) and no second resistor (R2 = open), forming a two-terminal bias network that eliminates external base resistors. It operates with open-base VCEO up to −50 V and supports DC output current up to −500 mA at Tamb ≤ 25 °C.
Its electrical behavior is defined by hFE = 100–250 at VCE = −5 V / IC = −50 mA, VCEsat ≤ −0.3 V under same conditions, and ICBO ≤ −100 nA at VCB = −40 V - confirming suitability for stable saturation switching in digitally controlled power paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V: maximum collector-emitter voltage with base open; defines safe blocking capability in PNP switch configurations |
| IO | −500 mA: continuous DC output current rating; sets upper limit for load-driving capacity in steady-state operation |
| R1 | 2.2 kΩ (1.54–2.86 kΩ): integrated base-input resistor enabling direct TTL/CMOS logic-level drive without external components |
| Ptot | 250 mW: total power dissipation on FR4 PCB at Tamb ≤ 25 °C; determines thermal headroom for ambient-limited designs |
| hFE | 100–250: DC current gain at −50 mA collector current; ensures reliable saturation with modest base drive |
| VCEsat | ≤ −0.3 V: collector-emitter saturation voltage at IC = −50 mA / IB = −2.5 mA; minimizes conduction loss in ON-state |
| Rth(j-a) | 500 K/W: junction-to-ambient thermal resistance in free air; informs temperature rise estimation for layout planning |
Pinout & Package
SOT346 (SC-59A/TO-236) plastic surface-mounted package with 3 leads; compact 3.0 × 1.7 mm footprint, 0.95 mm max height, and gull-wing leads for reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | input (base) | Connected internally to R1; accepts logic-level input directly; no external pull-up/down needed |
| 2 | GND (emitter) | Common reference terminal; tied to system ground in standard PNP high-side switch configuration |
| 3 | output (collector) | Switched output node; connects to load supply rail (e.g., +VCC) when used as high-side driver |
Key Features
| Feature | Design Value |
|---|---|
| Built-in 2.2 kΩ base resistor | Enables direct interface with 3.3 V/5 V logic without external biasing components |
| −500 mA output current capability | Supports driving relays, LEDs, small solenoids, and logic inputs in automotive body electronics |
| Open R2 configuration | Provides fixed single-resistor bias topology optimized for simple digital on/off control |
| Low VCEsat (≤ −0.3 V) | Reduces power loss and heat generation during sustained conduction in load-switching applications |
| SOT346 surface-mount package | Enables automated assembly and space-constrained PCB layouts in industrial control modules |
Applications
| Automotive Body Control | Industrial PLC Input Conditioning |
|---|---|
Use Scenario: Driving door lock actuators and interior lighting loads in 12 V vehicle systems. IC Role / Device Role / Timing Role: High-side PNP switch controlling +12 V loads via microcontroller GPIO. Use Value: Built-in R1 eliminates discrete base resistor, reducing BOM count and PCB area while maintaining −500 mA drive capability. | Use Scenario: Converting 24 V industrial sensor signals to 3.3 V/5 V logic-compatible levels for PLC input cards. IC Role / Device Role / Timing Role: Level-shifting and current-limiting interface transistor between field devices and digital controller inputs. Use Value: −50 V VCEO withstands inductive kickback; open-base rating ensures robustness against floating input faults. |
| Consumer Appliance Power Sequencing | Medical Diagnostic Equipment Signal Isolation |
Use Scenario: Enabling sequential power-up of subsystems (e.g., display backlight, motor drivers) in smart home appliances. IC Role / Device Role / Timing Role: Digital-controlled power gate for isolated 5 V/12 V rails using microcontroller outputs. Use Value: Low VCEsat minimizes voltage drop across switch, preserving regulated rail accuracy during active state. | Use Scenario: Isolating microcontroller I/O from analog front-end circuitry in portable diagnostic tools. IC Role / Device Role / Timing Role: Digital signal buffer preventing backfeed and protecting sensitive analog sections. Use Value: −0.5 μA ICEO ensures negligible leakage into protected analog domains during standby states. |
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 |
|---|---|---|---|
| BC807-40,115 | No integrated bias resistors; requires external RB; higher hFE (250–630) but larger VCEsat (≤ −0.7 V) | Needs additional PCB real estate and assembly step; better for linear amplification than saturated switching | Select when precise gain control or analog operation is required; not drop-in for RET-based logic interfaces |
| PDTB123TT,215 | Same electrical specs but SOT23 package (smaller footprint, lower Ptot = 250 mW, identical Rth(j-a) = 500 K/W) | Identical function with tighter board space constraints; thermal performance matches only at low duty cycles | Choose for ultra-compact layouts where SOT346 mounting is impractical; verify thermal margin at full −500 mA |
Compared with BC807-40,115 and PDTB123TT,215, the PDTB123TK offers optimal balance of integrated simplicity, proven SOT346 manufacturability, and thermal reliability on standard FR4 - making it preferred for high-volume automotive and industrial digital switching where BOM reduction and assembly yield are critical.
Availability
PDTB123TK is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input conditioning, and consumer appliance power sequencing requiring stable component supply and long-term production continuity.
Supply support for PDTB123TK 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.
The PDTB123T series belongs to NXP's Resistor-Equipped Transistor (RET) product line, engineered specifically to replace discrete BJT + resistor combinations in digital switching applications across automotive and industrial markets.
FAQ
What is the pin configuration of PDTB123TK?
PDTB123TK uses SOT346 package with Pin 1 = input (base), Pin 2 = GND (emitter), Pin 3 = output (collector). This pinout differs from SOT54 variants where emitter is Pin 3 - correct orientation is essential to avoid reverse-bias damage during PCB layout and assembly.
Does PDTB123TK have a second bias resistor (R2)?
No, PDTB123TK has R2 = open per its datasheet specification. It contains only one internal 2.2 kΩ base-input resistor (R1), forming a single-resistor bias network ideal for straightforward digital on/off control without feedback or emitter degeneration requirements.
What is the maximum ambient temperature for continuous −500 mA operation of PDTB123TK?
PDTB123TK is rated for −500 mA DC output current only at Tamb ≤ 25 °C. At higher temperatures, current must be derated per its thermal resistance (Rth(j-a) = 500 K/W) and maximum junction temperature (Tj = 150 °C); full-rated current is not sustainable above ~50 °C ambient without heatsinking.
Can PDTB123TK replace BC807-40 in existing designs?
PDTB123TK is not a direct replacement for BC807-40 due to different pinout (SOT346 vs. SOT23), integrated R1, and PNP-only configuration. While functionally similar in switching roles, PCB layout, base drive design, and thermal validation must be re-evaluated before substitution in any BC807-40 design.
What marking code identifies PDTB123TK on the device body?
PDTB123TK is marked with "F1" on its top surface per Table 5 of the NXP datasheet. This 2-character code distinguishes it from other variants in the PDTB123T series (e.g., PDTB123TS = "TB123TS", PDTB123TT = "*1U") and confirms correct variant identification during incoming inspection or field verification.
PDTB123TK,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):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 50mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- -
- Power - Max:
- 250 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMT3; MPAK
PDTB123TK,115 FAQ
1.How can I place an order for PDTB123TK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTB123TK,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 PDTB123TK,115 reliable?
The price and inventory of PDTB123TK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTB123TK,115 is usually 5 days.
3.What payment methods are accepted for PDTB123TK,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTB123TK,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTB123TK,115?
PDTB123TK,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTB123TK,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 PDTB123TK,115?
For technical support, including PDTB123TK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTB123TK,115 requirements.
6.How does Aetrix verify that PDTB123TK,115 is sourced from the original manufacturer or authorized distributors?
All PDTB123TK,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 PDTB123TK,115 meets industry standards.
7.What is the process for return or replacement of PDTB123TK,115?
All PDTB123TK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTB123TK,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 PDTB123TK,115 part is unused and in its original packaging.
Return procedure for PDTB123TK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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