Nexperia USA Inc. BSP43,115

Overview

BSP43,115 from Nexperia is an NPN medium power transistor in SOT223 package, rated for 80 V V_CEO, 1 A continuous collector current, and 1.3 W total power dissipation at T_amb ≤ 25 °C. It serves as a general-purpose switching device in telephony line interfaces and industrial control circuits requiring robust DC gain (h_FE = 100–300 at I_C = 100 mA) and low saturation voltage (V_CEsat ≤ 0.5 V at I_C = 500 mA).

For engineers reviewing the BSP43,115 datasheet, BSP43,115 pinout, BSP43,115 application, or BSP43,115 equivalent, this discrete transistor is selected for medium-power linear and switching roles where thermal resistance to ambient (93 K/W) and junction-to-soldering-point (12 K/W) are critical for PCB-level thermal management in thick-film and industrial control modules.

Technical Context

The BSP43,115 operates as a silicon NPN bipolar junction transistor with a maximum collector-emitter breakdown voltage of 80 V under open-base conditions and 90 V collector-base. Its DC current gain varies from 30 (at I_C = 100 μA) to 300 (at I_C = 100 mA), supporting both low-current biasing and moderate-power switching.

It features a transition frequency f_T ≥ 100 MHz at I_C = 50 mA and V_CE = 10 V, enabling use in audio-frequency amplification and fast-switching applications up to several megahertz. The SOT223 package integrates a large collector pad for enhanced heat transfer, with validated thermal resistance values referenced to standard single-sided 1 cm² copper mounting.

Key Specifications

Pinout & Package

SOT223 plastic surface-mounted package with integrated collector pad for improved thermal performance; 4-terminal construction (pins 2 and 4 internally connected to collector).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power transistor applications.

Compared with ZTX653 and MJD127, the BSP43,115 delivers optimal balance of voltage rating, current capacity, and thermal performance in SOT223-making it preferred for standalone medium-power switching where board space and thermal management are constrained.

Availability

BSP43,115 is available at Aetrix Electronics and suitable for telephony line interfaces, industrial relay drivers, thick-film amplifiers, and motor control feedback stages requiring stable component supply and long-term manufacturability.

Supply support for BSP43,115 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 division, with focus on automotive, industrial, computing, and consumer markets.

The BSP43,115 belongs to Nexperia's legacy medium-power bipolar transistor product line, engineered for reliable switching and linear operation in cost-sensitive industrial and telecom infrastructure applications.

FAQ

Is BSP43,115 RoHS compliant and lead-free?

Yes, BSP43,115 is RoHS compliant and lead-free. Nexperia confirms compliance with Directive 2011/65/EU and subsequent amendments, including exemption 7a for lead in high-melting-temperature solder. The device uses lead-free matte tin termination and meets JEDEC J-STD-020 moisture sensitivity level 1.

What is the recommended PCB layout for thermal performance?

For optimal thermal performance, use a minimum 1 cm² single-sided copper pad connected to pin 2 and pin 4 (collector) with ≥4 thermal vias to inner ground planes. Avoid solder mask over the collector pad and maintain ≥0.5 mm clearance from adjacent traces to prevent thermal coupling and ensure R_{th j-a} ≤ 93 K/W.

Can BSP43,115 replace BSP41 in existing designs?

Yes, BSP43,115 can replace BSP41 in most designs: both share identical SOT223 package, pinout, and thermal characteristics, but BSP43 offers higher V_CEO (80 V vs. 60 V) and V_CBO (90 V vs. 70 V). No layout changes are needed, though system-level overvoltage margin should be re-verified.

Does BSP43,115 have a qualified AEC-Q101 rating for automotive use?

No, BSP43,115 is not AEC-Q101 qualified. It is specified for industrial and telephony applications with operating ambient temperature from −65 °C to +150 °C, but lacks the stress testing, failure analysis, and documentation required for automotive qualification. For AEC-Q101 applications, consider Nexperia's BC846B-Q or PBSS4041T.