My Inquiry
My Account
Diodes Incorporated DCX143TK-7-F
- Part No.:
- DCX143TK-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays, Pre-Biased
- Package:
- SC-74, SOT-457
- Datasheet:
-
DCX143TK-7-F.pdf
- Description:
- TRANS NPN/PNP PREBIAS 0.3W SC74R
- Quantity:
- Payment:
- Shipping:
Inventory:2,670
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DCX143TK-7-F from Diodes Incorporated is a dual complementary pre-biased transistor in SOT26 package, integrating one NPN and one PNP transistor with built-in 4.7kΩ base bias resistor (R1) on the NPN side only. It supports ±50V breakdown voltage, ±100mA max collector current per section, and operates across –55°C to +150°C. Used in compact level-shifting and signal inversion circuits within automotive body control modules.
For engineers reviewing the DCX143TK-7-F datasheet, DCX143TK-7-F pinout, DCX143TK-7-F application, or DCX143TK-7-F equivalent, key selection criteria include verified R1 = 4.7kΩ tolerance (±30%), VCE(sat) ≤ ±0.3V at IC/IB = ±2.5mA/±0.25mA, hFE = 100–600, and SOT26 thermal resistance of 417°C/W.
Technical Context
This device implements a dual discrete topology-NPN and PNP transistors share no internal connection-each with independent emitter-base-collector terminals and dedicated biasing. The NPN section includes only R1 (4.7kΩ), while the PNP section has no integrated resistors, requiring external biasing for active operation.
It delivers rail-to-rail input voltage handling: NPN accepts –10V to +40V; PNP accepts +10V to –40V. Saturation performance is specified under matched IC/IB ratios (±2.5mA/±0.25mA), and fT is rated at 250MHz for both sections under defined AC test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | ±50V - Ensures safe operation in 24V automotive and industrial supply rails with margin. |
| IC(MAX) | ±100mA - Supports moderate-signal switching in LED drivers and logic interface buffers. |
| VCE(sat) | ≤ ±0.3V @ ±2.5mA/±0.25mA - Minimizes conduction loss in low-voltage digital output stages. |
| hFE | 100–600 - Provides stable current gain across temperature for predictable biasing in linear and switching modes. |
| R1 | 4.7kΩ ±30% - Enables direct TTL/CMOS-compatible input drive without external base resistor on NPN side. |
| PD | 300mW - Limits continuous power in SOT26 footprint; requires derating above 25°C ambient. |
| RθJA | 417°C/W - Dictates thermal design margin on FR-4 PCBs with minimum pad layout. |
Pinout & Package
SOT26 surface-mount package: 6-pin, molded plastic case (UL 94V-0), matte tin-plated leads, 0.016g weight. Dimensions per Diodes' outline drawing: D = 3.00mm, E = 2.80mm, e1 = 1.90mm, L = 0.40mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NPN Emitter | Common emitter node for NPN section; referenced to system ground in low-side switch configuration. |
| 2 | NPN Base | Connected internally to R1 (4.7kΩ); accepts logic-level input directly without external pull-up/down. |
| 3 | NPN Collector | Output node for NPN; sinks current when driven high at Pin 2 (e.g., driving LEDs or MOSFET gates). |
| 4 | PNP Emitter | Common emitter node for PNP section; tied to positive rail in high-side switch applications. |
| 5 | PNP Base | Unbiased terminal; requires external resistor network to set operating point and prevent saturation instability. |
| 6 | PNP Collector | Output node for PNP; sources current when base is pulled low relative to emitter (e.g., level-shifted control signals). |
Key Features
| Feature | Design Value |
|---|---|
| Complementary dual topology | Independent NPN + PNP die in single SOT26 - reduces board space vs. discrete pairs and avoids matching drift. |
| Integrated NPN bias resistor | R1 = 4.7kΩ ±30% - eliminates one external component for NPN logic-level drive, improving BOM simplicity. |
| Automotive-grade construction | Qualified per AEC-Q101 requirements (per Diodes' product definitions page) - suitable for under-hood and body electronics. |
| Green material compliance | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb), RoHS 3 compliant - meets global environmental directives. |
| Wide temperature range | –55°C to +150°C operation - enables use in engine control units and powertrain modules without derating. |
Applications
| Automotive Body Control Unit | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Driving door lock actuators and interior lighting via microcontroller GPIOs with limited drive strength. IC Role / Device Role / Timing Role: Dual-level shifter and current amplifier - NPN switches ground path, PNP drives 12V loads directly from 3.3V logic. Use Value: Eliminates need for two separate bias networks; ±50V rating withstands load dump transients up to ISO 7637-2 Pulse 5a. |
Use Scenario: Isolating field-side digital inputs from 24V DC sensor signals in modular I/O racks. IC Role / Device Role / Timing Role: Signal conditioner and polarity inverter - converts sinking/sourcing inputs into clean CMOS-compatible levels. Use Value: 417°C/W thermal resistance allows sustained 100mA operation at 85°C ambient with standard PCB copper pour. |
| Consumer Appliance Motor Driver | Medical Infusion Pump Logic Interface |
|
Use Scenario: Controlling bidirectional DC motor direction using H-bridge gate control signals. IC Role / Device Role / Timing Role: Complementary level translator - shifts 3.3V MCU outputs to ±12V gate drive references for NMOS/PMOS half-bridges. Use Value: Matched VCE(sat) ≤ ±0.3V ensures symmetrical turn-on delay and minimizes shoot-through risk during commutation. |
Use Scenario: Interfacing safety-critical microcontroller watchdog outputs to relay driver circuits. IC Role / Device Role / Timing Role: Redundant signal inverter - provides fail-safe active-low enable path with independent NPN/PNP paths. Use Value: –55°C to +150°C range supports sterilization cycles and extended shelf-life storage without parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DCX114TK-7 | R1 = 10kΩ (vs. 4.7kΩ); same SOT26, no R2; identical thermal specs. | Higher input impedance suits 5V CMOS drive; lower base current reduces MCU loading but increases VCE(sat) margin. | Select when interfacing with higher-VOH logic families or where lower quiescent base current is critical. |
| NSBC114TDXV6T1G | Single NPN pre-biased (R1 = 10kΩ, R2 = 10kΩ); SOT-563; 200mW PD. | Lacks PNP complement; smaller package limits power handling; no automotive qualification claimed. | Use only for NPN-only functions where space is constrained and AEC-Q101 is not required. |
Compared with DCX143TK-7-F, DCX114TK-7 offers higher input impedance at the cost of reduced drive strength, while NSBC114TDXV6T1G sacrifices complementarity and automotive qualification for footprint reduction-neither matches the original's balanced NPN drive + PNP flexibility in harsh environments.
Availability
DCX143TK-7-F is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC I/O modules, consumer appliance motor drivers, and medical infusion pump logic interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DCX143TK-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
DCX-series pre-biased transistors are engineered for space-constrained signal conditioning and interface applications where board area, BOM count, and AEC-Q101 compliance are critical design constraints.
FAQ
Does DCX143TK-7-F include bias resistors on both NPN and PNP sections?
No. Only the NPN section integrates a 4.7kΩ base resistor (R1); the PNP section has no internal biasing resistors. External base resistors must be used for PNP biasing to ensure stable operation and avoid thermal runaway. This asymmetry enables flexible input drive configurations-e.g., direct logic drive on NPN and precision current-limited bias on PNP.
What is the maximum allowable input voltage at the NPN base (Pin 2)?
The NPN base accepts –10V to +40V per datasheet absolute maximum ratings. However, for reliable operation, input must remain within –5V to +5V to avoid forward-biasing the base-emitter junction beyond its 5V reverse breakdown (BVEBO) and prevent damage. Exceeding ±5V requires series current limiting or clamping.
Can DCX143TK-7-F replace discrete BC847/BC857 pairs in existing designs?
Yes-with circuit modification. Its integrated R1 simplifies NPN drive but removes flexibility in setting IB. The PNP side requires added base resistors, unlike discrete BC857. Layout must accommodate SOT26's 6-pin footprint versus two SOT-23s. Thermal performance is comparable (300mW/417°C/W), but verify saturation voltage at target IC due to fixed R1.
Is DCX143TK-7-F qualified to AEC-Q101?
Yes. Per Diodes' Product Definitions page (https://www.diodes.com/quality/product-definitions/), the DCX family is explicitly listed as AEC-Q101 qualified and manufactured in IATF 16949 certified facilities. This includes DCX143TK-7-F, supporting automotive applications requiring PPAP documentation and change control.
DCX143TK-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74, SOT-457
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- 1 NPN, 1 PNP - Pre-Biased (Dual)
- Current - Collector (Ic) (Max):
- 100mA
- Voltage - Collector Emitter Breakdown (Max):
- 50V
- Resistor - Base (R1):
- 4.7kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 250µA, 2.5mA
- Current - Collector Cutoff (Max):
- -
- Frequency - Transition:
- 250MHz
- Power - Max:
- 300mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74R
DCX143TK-7-F FAQ
1.How can I place an order for DCX143TK-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DCX143TK-7-F 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 DCX143TK-7-F reliable?
The price and inventory of DCX143TK-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DCX143TK-7-F is usually 5 days.
3.What payment methods are accepted for DCX143TK-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DCX143TK-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DCX143TK-7-F?
DCX143TK-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DCX143TK-7-F 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 DCX143TK-7-F?
For technical support, including DCX143TK-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DCX143TK-7-F requirements.
6.How does Aetrix verify that DCX143TK-7-F is sourced from the original manufacturer or authorized distributors?
All DCX143TK-7-F 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 DCX143TK-7-F meets industry standards.
7.What is the process for return or replacement of DCX143TK-7-F?
All DCX143TK-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DCX143TK-7-F, 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 DCX143TK-7-F part is unused and in its original packaging.
Return procedure for DCX143TK-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DCX143TK-7-F Tags
-
SMUN5311DW1T1G
onsemi
-
UMH9NTN
Rohm Semiconductor
-
PUMH13,115
Nexperia USA Inc.
-
PUMD3-QX
Nexperia USA Inc.
-
PUMD2,115
Nexperia USA Inc.
-
RN4987FE,LF(CT
Toshiba Semiconductor and Storage
-
PUMD12,115
Nexperia USA Inc.
-
PUMD9,115
Nexperia USA Inc.
-
PUMH9,115
Nexperia USA Inc.
-
PUMD3,115
Nexperia USA Inc.
-
DCX114EU-7-F
Diodes Incorporated
-
PUMD13,115
Nexperia USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
