NXP Semiconductors 2PA1774S,115

Overview

2PA1774S,115 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 270–560 at I_C = −1 mA. It serves as a low-voltage, low-current switch or amplifier in consumer audio signal routing and EDP power management circuits.

For engineers reviewing the 2PA1774S,115 datasheet, 2PA1774S,115 pinout, 2PA1774S,115 application, or 2PA1774S,115 equivalent, key selection criteria include verified h_FE range, SC-75 thermal resistance (833 K/W), V_CEsat ≤ −200 mV at −50 mA/−5 mA, f_T ≥ 100 MHz, and compatibility with FR4 PCB mounting under ambient temperatures from −65 °C to +150 °C.

Technical Context

This PNP BJT operates in active or saturation mode for linear amplification or digital switching. Its design supports low-power bias networks and emitter-follower configurations, with cut-off currents ICBO ≤ −100 nA at 25 °C and IEBO ≤ −100 nA, ensuring minimal leakage in standby states.

Thermal performance is defined for FR4 PCB mounting with single-sided copper and standard footprint, yielding R_th(j-a) = 833 K/W. The device achieves f_T = 100 MHz under I_E = −2 mA, V_CE = −12 V conditions, confirming 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-ended leadframe, optimized for space-constrained consumer PCBs. Dimensions per JEDEC SC-75 standard: body size 1.75 × 0.95 mm, lead pitch 0.9 mm, total height ≤ 0.6 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC807-25,115 and MMBT3906LT1G, the 2PA1774S,115 offers superior h_FE consistency and SC-75 space savings for ultra-compact consumer designs, though it trades off absolute power handling and RF bandwidth-making it optimal for cost-sensitive, size-constrained EDP and audio signal path applications where gain accuracy and thermal predictability are primary.

Availability

2PA1774S,115 is available at Aetrix Electronics and suitable for consumer audio signal routing, EDP power sequencing, and wearable sensor biasing requiring stable component supply across high-volume production cycles.

Supply support for 2PA1774S,115 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 2PA1774S,115 belongs to Nexperia's general-purpose bipolar transistor product line, engineered for reliable low-voltage switching and amplification in cost-sensitive, space-constrained consumer electronics.

FAQ

What is the maximum continuous collector current rating for the 2PA1774S,115?

The 2PA1774S,115 has a maximum DC collector current (I_C) rating of −150 mA, specified under ambient temperature ≤25 °C with standard FR4 PCB mounting. This value defines the upper limit for steady-state conduction without exceeding thermal limits or degrading reliability. Exceeding this current requires derating based on ambient temperature and PCB copper area, as detailed in the thermal characteristics table of the official Nexperia datasheet for 2PA1774S,115.

Does the 2PA1774S,115 have a documented transition frequency (f_T) specification?

Yes, the 2PA1774S,115 has a guaranteed minimum transition frequency (f_T) of 100 MHz, measured at I_E = −2 mA, V_CE = −12 V, and f = 100 MHz. This parameter confirms its capability for small-signal amplification up to mid-audio frequencies and validates stable gain behavior in linear applications. The f_T value is explicitly listed in Table 6 of the Nexperia 2PA1774S,115 datasheet and applies directly to the 2PA1774S variant.

What is the marking code for the 2PA1774S,115 on the physical device?

The 2PA1774S,115 is marked with the code "YS" on its top surface, as confirmed in Table 3 of the official Nexperia datasheet. This 2-character laser marking distinguishes it from other variants in the 2PA1774 family (e.g., YQ for 2PA1774Q, YR for 2PA1774R) and enables visual identification during manual assembly or inspection. The marking appears on the plastic body of the SOT416 package adjacent to pin 1.

Is the 2PA1774S,115 pin-compatible with its NPN complement 2PC4617?

No, the 2PA1774S,115 is not pin-compatible with the 2PC4617. While both use the SOT416 (SC-75) package, their pinouts differ: 2PA1774S,115 assigns pin 1 to base, pin 2 to emitter, and pin 3 to collector; the 2PC4617 uses pin 1 for emitter, pin 2 for base, and pin 3 for collector. This inversion requires separate PCB footprints and cannot be substituted without layout modification. Always verify pin assignments in the respective datasheets before design reuse.

What thermal resistance does the 2PA1774S,115 exhibit on a standard FR4 PCB?

The 2PA1774S,115 exhibits a junction-to-ambient thermal resistance (R_th(j-a)) of 833 K/W when mounted on a standard FR4 printed-circuit board with single-sided copper, tin-plated, and the manufacturer-recommended footprint. This value is measured under the conditions defined in Table 5 of the Nexperia datasheet and forms the basis for thermal derating calculations. It reflects typical performance without added heatsinking or enhanced copper pours.