NXP Semiconductors 2PA1774R,135

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 consumer audio signal routing and EDP peripheral control circuits.

For engineers reviewing the 2PA1774R datasheet, 2PA1774R pinout, 2PA1774R application, or 2PA1774R equivalent, key selection criteria include its verified −50 V collector-emitter breakdown, 180–390 h_FE range at low bias, −200 mV V_CE(sat) at −50 mA/−5 mA drive, 2.2 pF C_c, and 100 MHz f_T - all confirmed for the 2PA1774R variant per NXP Semiconductors Rev. 05 data sheet.

Technical Context

The 2PA1774R operates as a silicon PNP BJT with base-controlled current amplification, optimized for linear amplification and saturated switching in low-power analog and digital interface stages. Its thermal resistance R_th(j-a) is 833 K/W on FR4 PCB, limiting continuous operation to ≤150 °C junction temperature under ambient conditions.

It exhibits low leakage: ICBO ≤ −100 nA at VCB = −30 V and Tj = 25 °C, rising to ≤ −5 μA at 150 °C, and IEBO ≤ −100 nA at VEB = −4 V. The transition frequency f_T of ≥100 MHz confirms suitability for audio-frequency and low-speed digital signal conditioning.

Key Specifications

Pinout & Package

SOT416 (SC-75) plastic surface-mounted package: ultra-small outline, 3-lead, single-row, lead pitch 0.95 mm, body size 1.7 × 0.9 × 0.5 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 2PA1774S and BC807-16, the 2PA1774R delivers optimal balance of gain range (180–390), ultra-compact SOT416 footprint, and proven −200 mV saturation performance - making it preferred for space-constrained, low-power switching where moderate gain stability is sufficient.

Availability

2PA1774R is available at Aetrix Electronics and suitable for consumer audio routing, EDP peripheral control, remote control logic, and low-power sensor interface applications requiring stable component supply and long-term industrial availability.

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, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products business, with focus on automotive, industrial, computing, consumer, and wearable markets.

The 2PA1774R belongs to Nexperia's general-purpose bipolar transistor product line, designed specifically for cost-sensitive, space-constrained switching and amplification tasks in consumer and computing end-equipment.

FAQ

What is the maximum collector-emitter voltage rating for the 2PA1774R?

The 2PA1774R has a maximum collector-emitter voltage (V_CEO) rating of −50 V with the base open, as specified in Table 4 of the official Nexperia data sheet (Rev. 05, 17 November 2009). This rating defines the upper limit for safe DC operation in PNP switch configurations and must not be exceeded to prevent avalanche breakdown. The 2PA1774R also supports −60 V V_CBO (collector-base) under open-emitter conditions.

What is the DC current gain (h_FE) range for the 2PA1774R at typical operating conditions?

The 2PA1774R exhibits a DC current gain (h_FE) range of 180 to 390 when measured at I_C = −1 mA and V_CE = −6 V, per Table 6 in the official data sheet. This binning distinguishes it from the 2PA1774Q (120–270) and 2PA1774S (270–560) variants. The 2PA1774R's gain window supports robust base resistor design for both switching and linear amplification uses.

Is the 2PA1774R pin-compatible with the NPN complement 2PC4617?

No, the 2PA1774R and 2PC4617 are complementary PNP/NPN transistors but not pin-compatible. The 2PA1774R uses pinout 1=base, 2=emitter, 3=collector in SOT416, while the 2PC4617 follows the same physical pinout but opposite polarity - meaning direct substitution would reverse circuit functionality. Layout reuse requires intentional polarity-aware redesign, not mechanical replacement.

What is the thermal resistance from junction to ambient (R_th(j-a)) for the 2PA1774R on a standard FR4 PCB?

The thermal resistance from junction to ambient (R_th(j-a)) for the 2PA1774R is 833 K/W when mounted on a single-sided FR4 PCB with tin-plated copper, as stated in Table 5 of the data sheet. This value assumes standard footprint and no thermal vias or copper pours. At 25 °C ambient, the 150 mW P_tot rating implies a maximum junction temperature rise of 125 °C - reaching the 150 °C absolute limit.

Does the 2PA1774R have a specified transition frequency (f_T) and what does it indicate for circuit design?

Yes, the 2PA1774R has a minimum transition frequency (f_T) of 100 MHz, measured at I_E = −2 mA, V_CE = −12 V, and f = 100 MHz (Table 6). This parameter indicates the frequency at which current gain drops to unity, confirming suitability for audio amplification, IR signal buffering, and low-speed digital edge sharpening - but not RF or high-speed switching above ~10 MHz.