NXP Semiconductors PDTC124TE,115

Overview

PDTC124TE from NXP Semiconductors (formerly Philips) is an NPN resistor-equipped transistor with integrated 22 kΩ base bias resistor (R1) and open R2, rated for 50 V V_CEO, 100 mA I_O, and 150 mV V_CEsat at I_C = 10 mA / I_B = 0.5 mA - used in compact logic-level switching circuits such as microcontroller GPIO drivers and LED interface stages.

For engineers reviewing the PDTC124TE datasheet, PDTC124TE pinout, PDTC124TE application, or PDTC124TE equivalent, this page delivers verified package mapping (SOT416/SC-75), confirmed pin assignment (Base–Emitter–Collector), thermal resistance (833 K/W), and two validated alternative parts with documented functional and layout differences.

Technical Context

This device integrates a single NPN bipolar junction transistor with a monolithic 22 kΩ pull-up base resistor (R1) and no internal R2 connection - enabling direct logic-level drive without external bias components. It operates with V_CEO = 50 V and supports DC output current up to 100 mA.

Designed for surface-mount use in SOT416 (SC-75) package, it features V_CEsat ≤ 150 mV at I_C = 10 mA and exhibits h_FE ≥ 100 at V_CE = 5 V / I_C = 1 mA, making it suitable for low-power digital switching where board space and BOM count are constrained.

Key Specifications

Pinout & Package

PDTC124TE is housed in a plastic surface-mounted SOT416 (SC-75) package measuring 1.7 × 0.95 × 0.5 mm, with gull-wing leads and 0.95 mm lead pitch. The package supports reflow soldering only and is rated for operating ambient temperature from −65 °C to +150 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC124TE, PDTC114TE offers lower input impedance for improved drive margin at the cost of higher base current, while MMBT3904LT1G provides broader gain tolerance and established supply chain at the expense of board area and assembly complexity.

Availability

PDTC124TE is available at Aetrix Electronics and suitable for microcontroller interface, LED driver, and logic-level inverter applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for PDTC124TE 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, headquartered in Eindhoven, Netherlands, designs high-performance analog, logic, and interface semiconductors for automotive, industrial, and consumer markets.

The PDTC124TE belongs to NXP's resistor-equipped transistor (RET) product line, engineered specifically to reduce discrete BOM count and simplify PCB layout in space-constrained digital interface circuits.

FAQ

What is the exact package type and dimensions of PDTC124TE?

PDTC124TE uses the SOT416 (SC-75) package: a plastic surface-mounted 3-lead outline measuring 1.7 mm × 0.95 mm × 0.5 mm with 0.95 mm lead pitch. Its gull-wing leads are designed exclusively for reflow soldering per Philips' 2004 specification, and mechanical drawings confirm pin 1 = Base, pin 2 = Emitter, pin 3 = Collector.

Does PDTC124TE have an internal pull-down resistor (R2)?

No - PDTC124TE has R2 = open, meaning only the 22 kΩ pull-up base resistor (R1) is integrated. This configuration supports standard low-side switching where the base is driven high to turn on the transistor. No internal R2 exists, so external pull-down is required only if active-low enable logic or noise immunity demands it.

What is the maximum continuous collector current for PDTC124TE?

The absolute maximum DC output current (I_O) for PDTC124TE is 100 mA, as specified in the Quick Reference Data and Limiting Values tables. This rating applies at T_amb ≤ 25 °C with proper PCB thermal relief; derating is required above 25 °C ambient, especially given its 833 K/W junction-to-ambient thermal resistance in free air.

Can PDTC124TE replace a standard 2N3904 in existing designs?

PDTC124TE is not a direct replacement for 2N3904 due to its integrated 22 kΩ base resistor and different pinout (SOT416 vs. TO-92). While both are NPN transistors, PDTC124TE requires no external bias resistor but mandates matching SOT416 footprint and layout. Use only after verifying drive voltage compatibility and thermal constraints in the target application.

What is the guaranteed DC current gain (h_FE) of PDTC124TE at typical operating conditions?

PDTC124TE guarantees h_FE ≥ 100 at V_CE = 5 V and I_C = 1 mA, as stated in the Characteristics table. This minimum gain ensures reliable saturation with ≤0.5 mA base current - sufficient for most 3.3 V and 5 V microcontroller GPIO outputs. The device does not specify upper h_FE limit, consistent with RET family characterization.