NXP Semiconductors 2PA1774R,115

Overview

2PA1774R from Nexperia is a PNP general-purpose bipolar junction transistor in SOT416 (SC-75) package, rated for −50 V V_CEO, −150 mA I_C, and 150 mW P_tot, with DC current gain (h_FE) of 180–390 at I_C = −1 mA. It serves as a low-voltage, low-current switch or amplifier in compact consumer and communication circuits.

For engineers reviewing the 2PA1774R datasheet, 2PA1774R pinout, 2PA1774R application, or 2PA1774R equivalent, key selection criteria include its verified h_FE range, SC-75 thermal resistance (R_th(j-a) = 833 K/W), V_CE(sat) ≤ −200 mV at −50 mA/−5 mA, and compatibility with FR4 PCB mounting per IEC 60134 limiting values.

Technical Context

This discrete PNP transistor operates in active or saturation mode for signal-level switching and linear amplification. Its design supports stable DC biasing with low leakage (I_CBO ≤ −100 nA at 25 °C) and predictable gain across temperature.

The device uses standard BJT physics with base-emitter forward bias enabling collector current control. Its f_T of 100 MHz confirms suitability for audio and low-MHz digital switching, while C_c = 2.2 pF at −12 V V_CB limits high-frequency parasitic coupling.

Key Specifications

Pinout & Package

SOT416 (SC-75) plastic surface-mounted package: 3-pin, ultra-small outline (1.8 mm × 1.4 mm × 0.9 mm), optimized for space-constrained PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 2PA1774S and BC807-25, the 2PA1774R delivers optimal balance of compact SOT416 size, moderate h_FE, and proven thermal performance on FR4 - making it ideal for cost- and space-sensitive consumer electronics where precise gain control and minimal footprint are primary constraints.

Availability

2PA1774R is available at Aetrix Electronics and suitable for consumer electronics, communication interface modules, and portable EDP equipment requiring stable component supply and long-term obsolescence management.

Supply support for 2PA1774R 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 semiconductors, formed in 2017 from NXP's Standard Products division, focused on high-volume, high-reliability components for automotive, industrial, and consumer markets.

The 2PA1774R belongs to Nexperia's general-purpose bipolar transistor family, engineered for robustness and consistency in cost-sensitive, high-yield manufacturing environments - especially where small-outline packaging and predictable DC characteristics are essential.

FAQ

What is the maximum continuous collector current for the 2PA1774R?

The 2PA1774R has a maximum DC collector current (I_C) of −150 mA, specified under ambient conditions ≤25 °C with standard FR4 PCB mounting. This rating assumes proper thermal management; derating is required above Tamb = 25 °C per the R_th(j-a) = 833 K/W thermal resistance. Exceeding this value risks permanent degradation of the 2PA1774R.

Does the 2PA1774R support high-frequency switching applications?

The 2PA1774R has a transition frequency (f_T) of 100 MHz, indicating usable small-signal gain up to ~10 MHz. While not intended for RF switching, it reliably handles digital logic-level toggling and audio-band amplification. For >10 MHz switching, layout parasitics and V_CE(sat) recovery must be validated - the 2PA1774R is best applied below 5 MHz for robust performance.

How does the 2PA1774R differ from the 2PA1774Q variant?

The 2PA1774R and 2PA1774Q share identical package (SOT416), absolute maximum ratings, and thermal specs, but differ in DC current gain: 2PA1774R guarantees h_FE = 180–390 at I_C = −1 mA, while 2PA1774Q specifies 120–270. This makes the 2PA1774R preferable where tighter gain control and higher minimum h_FE are required in the 2PA1774R design.

What is the marking code for the 2PA1774R on the package?

The 2PA1774R is marked with the code "YR" on its SOT416 body, as confirmed in Table 3 of the official datasheet. This laser-marked identifier enables visual traceability and distinguishes it from the 2PA1774Q (YQ) and 2PA1774S (YS) variants during manual or automated inspection of the 2PA1774R.

Can the 2PA1774R replace an NPN transistor like the 2PC4617 in the same circuit?

No - the 2PA1774R is a PNP transistor and cannot directly replace the NPN 2PC4617 without reversing bias polarity and redesigning the surrounding network. The 2PC4617 is explicitly cited as the NPN complement, meaning they are designed for mirrored roles (e.g., high-side vs. low-side switching). Substituting the 2PA1774R for 2PC4617 would invert logic behavior and likely cause circuit failure unless the entire bias scheme is re-engineered for the 2PA1774R.