Nexperia USA Inc. BC857BSHX

Overview

BC857BSHX from Nexperia is a PNP/PNP general-purpose double transistor in SOT363 (SC-88) package, rated for −45 V V_CEO, −100 mA I_C, and 200–450 h_FE per transistor. It delivers matched gain, low V_CE(sat) (−200 mV typ. at −100 mA), and operates up to 175 °C junction temperature-ideal for space-constrained dual-switching or amplification stages in industrial control and power management circuits.

For engineers reviewing the BC857BSHX datasheet, BC857BSHX pinout, BC857BSHX application, or BC857BSHX equivalent, this device supports high-temperature dual-transistor functions with verified thermal derating, low collector capacitance (1.8 pF), and no mutual interference between channels-key for precision analog switching and matched-pair biasing.

Technical Context

This dual PNP transistor integrates two electrically isolated, thermally coupled transistors in one ultra-compact SOT363 package. Each channel exhibits tightly matched DC current gain (h_FE = 200–450 at −2 mA), low saturation voltage (−200 mV typ. at −100 mA/−5 mA drive), and low collector capacitance (1.8 pF).

It supports operation across −55 °C to +175 °C ambient, with per-device P_tot = 400 mW on FR4 PCB and R_th(j-a) = 375 K/W. The absence of cross-talk enables independent base control-critical for differential pair drivers, dual-level shunt regulators, and redundant signal paths.

Key Specifications

Pinout & Package

SOT363 (TSSOP6) plastic surface-mount package: 6-pin, 0.65 mm pitch, 2.1 mm × 1.25 mm × 0.95 mm body. Designed for reflow and wave soldering with defined footprint (Fig. 12–13 in datasheet).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC857BSHX, BC847BPNH offers complementary polarity but cannot replicate matched dual-PNP behavior, while MBT3906DW1T1G trades gain accuracy and voltage rating for broader distributor availability-making BC857BSHX optimal for precision dual-switch or matched-amplifier roles.

Availability

BC857BSHX is available at Aetrix Electronics and suitable for industrial sensor interfaces, dual-channel level shifting, and redundant power path control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BC857BSHX 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 technologies-delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

BC857BSHX belongs to Nexperia's general-purpose bipolar transistor family, engineered for space-constrained, high-reliability dual-transistor applications demanding thermal stability, gain matching, and low saturation loss.

FAQ

What is the maximum continuous collector current per transistor in BC857BSHX?

The absolute maximum continuous collector current per transistor is −100 mA, as specified in Table 5 (Limiting Values). This rating applies at T_amb ≤ 25 °C on a standard FR4 PCB; derating is required above 25 °C per the 375 K/W thermal resistance curve in Figure 1.

Can BC857BSHX be used in place of two separate BC857B transistors?

Yes-BC857BSHX integrates two BC857B-equivalent PNP transistors in one SOT363 package with identical V_CEO, I_C, and h_FE specifications. Its key advantage is guaranteed thermal coupling and matched characteristics, unlike discrete placements which suffer from layout-induced gain mismatch and thermal gradient errors.

What is the meaning of the marking code '7D%' on BC857BSHX?

The marking code '7D%' appears on the top surface of the SOT363 package, where '7D' identifies the BC857BSHX type and '%' is a placeholder for the manufacturing site code (e.g., 'A' for Nijmegen, 'B' for Bangkok). This matches Table 4 in the official Nexperia datasheet dated 19 March 2021.

Does BC857BSHX support wave soldering?

Yes-Nexperia provides a dedicated wave soldering footprint (Figure 13) for the SOT363 package, specifying solder land dimensions, solder resist openings, and preferred transport direction. Peak temperature must remain within JEDEC J-STD-020 limits, and the device is qualified for both reflow and wave processes per its qualification status in Table 8.