Nexperia USA Inc. BCP51-10-QF

Overview

BCP51-10-QF from Nexperia is a PNP medium-power bipolar junction transistor in SOT223 (SC-73) package, rated for −45 V V_CEO, −1 A continuous collector current, and 1.35 W power dissipation with 6 cm² copper pad. It delivers h_FE = 63–160 at V_CE = −2 V and I_C = −150 mA, and is AEC-Q101 qualified for automotive high-side switching and linear regulation.

For engineers reviewing the BCP51-10-QF datasheet, BCP51-10-QF pinout, BCP51-10-QF application, or BCP51-10-QF equivalent, this page provides verified electrical parameters, thermal derating curves, junction-to-ambient thermal resistance (93 K/W), and validated alternatives for high-reliability power control designs.

Technical Context

This PNP transistor operates as a medium-power linear or switching device with fixed polarity and DC-coupled base drive. Its design supports stable current gain across −55 °C to +150 °C ambient, with V_BE ≈ −1 V and V_CE(sat) ≤ −0.5 V at I_C = −500 mA / I_B = −50 mA.

Thermal performance is defined by three mounting conditions: standard footprint (192 K/W), 1 cm² collector pad (125 K/W), and 6 cm² pad (93 K/W). Transient thermal impedance data confirms suitability for pulsed loads up to 2 A with ≤1 ms pulse width and ≤2% duty cycle.

Key Specifications

Pinout & Package

SOT223 (SC-73) surface-mount plastic package with 4 leads, 2.3 mm pitch, and 6.5 mm × 3.5 mm × 1.65 mm body dimensions. Collector terminals are internally connected to pins 2 and 4 for enhanced thermal conduction and current sharing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCP52-10-Q, BCP51-10-QF offers lower voltage rating but identical thermal and gain specs in SOT223; versus ZTX753, it provides superior thermal performance and surface-mount compatibility at the cost of reduced voltage margin.

Availability

BCP51-10-QF is available at Aetrix Electronics and suitable for automotive power management, industrial linear regulators, and battery protection circuits requiring stable component supply and AEC-Q101 compliance.

Supply support for BCP51-10-QF 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 semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient power solutions.

The BCP51-Q series belongs to Nexperia's AEC-Q101-qualified medium-power transistor product line, engineered for robust linear and switching operation in automotive body control, power conversion, and safety-critical subsystems.

FAQ

What is the maximum allowable junction temperature for BCP51-10-QF?

The absolute maximum junction temperature is 150 °C per IEC 60134. Operation above this threshold risks permanent degradation of h_FE and increased leakage. Derating curves in the datasheet define safe power limits based on ambient temperature and PCB copper area-e.g., at 100 °C ambient with 6 cm² pad, max power drops to ~0.75 W.

Can BCP51-10-QF replace BCP51-16-Q in a design?

Yes, but only if the circuit does not require minimum h_FE ≥100. BCP51-10-QF has h_FE = 63–160, while BCP51-16-Q guarantees 100–250. In base-driven switches where gain margin is critical, substitution may cause insufficient saturation at low I_B; verify V_CE(sat) and temperature stability under worst-case conditions.

Is the SOT223 footprint compatible with standard reflow soldering profiles?

Yes-the device is qualified for lead-free reflow per J-STD-020. The recommended profile uses peak temperature ≤260 °C for ≤30 seconds, with ramp rates ≤3 °C/s. Figure 10 in the datasheet specifies exact solder land dimensions (6.15 mm × 3.85 mm for collector pad) and paste volume to ensure void-free thermal interface and mechanical reliability.

Does BCP51-10-QF support pulsed operation beyond its DC ratings?

Yes-it is rated for 2 A peak collector current (t_p ≤ 1 ms, duty cycle ≤2%). This enables short-duration overload handling, such as motor startup surge suppression or capacitor charging. Thermal transient impedance curves (Fig. 2–4) confirm junction temperature rise remains within limits for these pulses when mounted on specified PCB copper areas.