Nexperia USA Inc. BC53PASX

Overview

BC53PASX from Nexperia is a PNP medium power transistor in DFN2020D-3 (SOT1061D) package, rated for −80 V V_CEO, −1 A continuous collector current, and 1.65 W total power dissipation at T_amb = 25 °C. It delivers h_FE of 63–250 at V_CE = −2 V, I_C = −150 mA, and supports high-side switching and linear regulation in space-constrained industrial power stages.

For engineers reviewing the BC53PASX datasheet, BC53PASX pinout, BC53PASX application, or BC53PASX equivalent, this page provides verified thermal resistance values (R_th(j-a) down to 76 K/W), side-wettable flank solder joint compatibility, AOI-suitable marking (CA), and validated DC gain bins-critical for robust analog power design and PCB area optimization.

Technical Context

The BC53PASX operates as a medium-power PNP bipolar junction transistor with open-base V_CEO = −80 V and pulsed I_CM = −2 A, enabling reliable operation in linear regulators and MOSFET gate drive circuits where negative rail control is required. Its ultra-thin 2 mm × 2 mm × 0.65 mm DFN2020D-3 package integrates exposed collector pad for thermal conduction and side-wettable flanks for automated optical inspection.

DC current gain is binned across the BC53xPAS series: BC53PAS (63–250), BC53-10PAS (63–160), and BC53-16PAS (100–250) at V_CE = −2 V, I_C = −150 mA. V_CE(sat) is −500 mV max at I_C = −500 mA / I_B = −50 mA, supporting low-loss switching in high-side configurations.

Key Specifications

Pinout & Package

BC53PASX uses the DFN2020D-3 (SOT1061D) leadless plastic package: 2 mm × 2 mm × 0.65 mm body, 1.3 mm pitch, side-wettable flanks, and exposed collector pad for thermal and electrical performance. Mounting requires reflow footprint per Fig. 12 (Nexperia doc rev. 14-03-12).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC53PASX, BC807-40X trades voltage headroom for higher gain and identical footprint, while PMST2907A sacrifices thermal capability and AOI support for SOT323 compatibility-making BC53PASX optimal for new designs demanding 80 V blocking and manufacturable reliability.

Availability

BC53PASX is available at Aetrix Electronics and suitable for linear voltage regulators, battery-driven devices, MOSFET drivers, and high-side switches requiring stable component supply, consistent h_FE binning, and AOI-validated assembly.

Supply support for BC53PASX 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 essential efficiency-enhancing components, delivering high-performance, reliable, and scalable discrete and logic solutions.

The BC53xPAS series belongs to Nexperia's medium-power bipolar transistor product line, engineered for compact, thermally efficient high-side switching and linear regulation in industrial and consumer power management systems.

FAQ

What is the maximum allowable junction temperature for BC53PASX?

The absolute maximum junction temperature (T_j) for BC53PASX is 150 °C, as defined in IEC 60134 limiting values. Operation above this threshold risks permanent degradation. Derating is required above T_amb = 25 °C per Fig. 1, where P_tot decreases linearly to zero at 175 °C ambient on optimized 4-layer PCB mounting.

Does BC53PASX support automatic optical inspection (AOI) of solder joints?

Yes-BC53PASX features side-wettable flanks per its DFN2020D-3 (SOT1061D) package specification, enabling reliable AOI detection of solder fillet quality without requiring X-ray. This is confirmed in Section 2 ("Features and benefits") and Fig. 12 footprint documentation, making it suitable for high-yield automated assembly lines.

How does the h_FE binning affect circuit design for BC53PASX?

BC53PASX is binned to h_FE = 63–250 at V_CE = −2 V, I_C = −150 mA. Designers must size base resistors using the minimum h_FE (63) to guarantee saturation under worst-case gain, while verifying thermal limits at maximum h_FE (250) to prevent unintended linear-mode operation during transients.

Can BC53PASX replace BC557 in existing SOT23-based designs?

No-BC53PASX uses DFN2020D-3 (SOT1061D), not SOT23. Pinout differs (1-B, 2-E, 3-C vs. SOT23's 1-E, 2-B, 3-C), and package dimensions (2 mm × 2 mm vs. 2.9 mm × 1.3 mm) require PCB redesign. While electrical specs overlap, mechanical incompatibility prevents drop-in replacement without layout revision and AOI requalification.