NXP Semiconductors PDTA143ZK,115

Overview

PDTA143ZK from NXP Semiconductors is a PNP resistor-equipped transistor with integrated bias resistors R1 = 4.7 kΩ and R2 = 47 kΩ, designed for compact switching applications in space-constrained PCB layouts. It features V_CEO = −50 V, I_O = −100 mA DC output current, and operates in SOT346 (SC-59) surface-mount package - commonly used in level-shifting interfaces and logic-driven load control circuits.

For engineers reviewing the PDTA143ZK datasheet, PDTA143ZK pinout, PDTA143ZK application, or PDTA143ZK equivalent, this page delivers verified electrical parameters, confirmed pin configuration, real-world use cases in interface circuits, and two validated alternative parts for design flexibility and supply continuity.

Technical Context

The PDTA143ZK integrates two precision bias resistors to eliminate external base-drive components, enabling direct connection to CMOS/TTL logic outputs. Its PNP topology supports active-low switching with emitter-follower or common-emitter configurations, and its −50 V V_CEO rating allows operation across industrial 24 V and automotive 12 V systems.

Thermal performance is defined by R_{th j-a} = 500 K/W in free air, matching SOT346's thermal profile, while V_CEsat ≤ −100 mV at I_C = −5 mA / I_B = −0.25 mA ensures low conduction loss in high-efficiency digital switching roles.

Key Specifications

Pinout & Package

Package: SOT346 (SC-59), plastic surface-mounted package with 3 leads; dimensions 3.1 × 1.7 × 1.3 mm (L × W × H); standard mounting on FR4 PCB with 60 μm copper trace.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP resistor-equipped transistor applications.

Compared with PDTC143ZK, PDTA143ZK provides high-side sourcing with non-inverted logic control; versus MMBT3906LT1G, it trades off external bias flexibility for reduced component count and guaranteed resistor tolerance (±25 % on R1/R2).

Availability

PDTA143ZK is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, and PLC digital output modules requiring stable component supply and long-term manufacturability.

Supply support for PDTA143ZK 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 PDTA143ZK belongs to NXP's resistor-equipped transistor family, engineered to simplify digital interface design by integrating precision bias networks into miniature surface-mount packages for cost-sensitive, high-volume applications.

FAQ

What is the pin configuration of the PDTA143ZK?

The PDTA143ZK uses SOT346 package with pin 1 = Base, pin 2 = Emitter, pin 3 = Collector. This configuration is confirmed in the "Simplified outline, symbol and pinning" section of the official NXP datasheet (2004 Aug 05). The internal R1–R2 network connects between base and emitter, enabling direct logic-level drive without external components. Always verify orientation using the marking code "19" on the top surface of the PDTA143ZK package.

Can PDTA143ZK replace a standard PNP transistor like BC807 in a switching circuit?

The PDTA143ZK can replace BC807 only if the circuit relies on fixed-base biasing and does not require adjustable current gain or variable saturation characteristics. Unlike BC807, the PDTA143ZK includes integrated 4.7 kΩ and 47 kΩ resistors, so removing external bias resistors is mandatory. Also, PDTA143ZK has lower V_CEO (−50 V vs. −45 V) and lower P_tot (250 mW vs. 310 mW), making it unsuitable for higher-power analog amplification. Verify thermal margin using R_{th j-a} = 500 K/W before substituting in existing BC807 designs.

What is the maximum operating temperature for PDTA143ZK?

The PDTA143ZK has a maximum junction temperature (T_j) of 150 °C and an operating ambient temperature range of −65 °C to +150 °C, as specified in the Limiting Values table of the NXP datasheet. Its thermal resistance R_{th j-a} is 500 K/W in free air, meaning at 100 mA output current and 100 mV V_CEsat, power dissipation is ~10 mW - resulting in <5 °C junction rise above ambient. For sustained high-temperature operation, ensure PCB copper area meets NXP's SOT346 standard mounting conditions.

Does PDTA143ZK support PWM switching applications?

Yes, the PDTA143ZK supports PWM switching up to ~100 kHz in typical load configurations, based on its C_c = 3 pF collector capacitance and V_CEsat ≤ −100 mV, which enable fast turn-on/turn-off transitions. However, no explicit switching time data (t_on/t_off) is provided in the datasheet, so actual performance depends on load impedance and drive strength. For >100 kHz or high-precision timing, consider dedicated MOSFET drivers or devices with published switching specs. Use PDTA143ZK in PWM dimming of LEDs or low-frequency solenoid actuation where ±10% duty cycle stability is acceptable.

Is PDTA143ZK RoHS compliant and lead-free?

Yes, the PDTA143ZK is RoHS compliant and lead-free, as confirmed by NXP's product status documentation and packaging markings. The device uses lead-free matte tin (Sn) termination on all leads and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1 for reflow soldering. The "115" suffix in the full orderable part number indicates tape-and-reel packaging per EIA-481 standard, with no lead content exceeding EU RoHS Directive limits (≤0.1 wt% Pb). Full compliance documentation is available via NXP's official product page under document number 9397 750 13658.