Nexperia USA Inc. BC856BS/ZLX

Overview

BC856BS/ZLX from Nexperia is a dual PNP general-purpose transistor pair in SOT363-3 (TSSOP6) package, rated for −65 V V_CEO, −100 mA I_C, and featuring h_FE = 200–450 at −2 mA/−5 V. It delivers low V_CE(sat) (−200 mV typ. at −100 mA/−5 mA), matched gain between transistors, and no mutual interference-ideal for compact dual-channel switching in power management and signal routing circuits.

For engineers reviewing the BC856BS datasheet, BC856BS pinout, BC856BS application, or BC856BS equivalent, this device supports space-constrained designs requiring dual PNP switching with thermal stability up to 150 °C junction temperature, low collector capacitance (2.3 pF), and verified performance across −55 °C to +150 °C ambient range.

Technical Context

The BC856BS integrates two electrically isolated PNP transistors in a single TSSOP6 package, sharing no internal connection-eliminating crosstalk and enabling independent biasing. Each transistor operates with V_CEO = −65 V, I_C = −100 mA, and exhibits tightly matched h_FE (200–450) under identical test conditions (V_CE = −5 V, I_C = −2 mA).

Its low C_c (2.3 pF) and f_T ≥ 100 MHz support high-frequency amplification and fast switching, while V_BE(sat) ≤ −900 mV (pulsed) ensures efficient drive in low-voltage logic interfaces. Thermal resistance R_th(j-a) is 416 K/W per device on FR4 PCB-critical for thermal-aware layout in dense SMT assemblies.

Key Specifications

Pinout & Package

BC856BS is housed in a 6-pin TSSOP6 (SOT363-3) surface-mount plastic package measuring 2.2 mm × 1.35 mm × 0.95 mm, optimized for automated assembly and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC856BS, BC857BS trades lower saturation voltage for higher gain-favoring low-drive logic interfaces-while MBT3906DW1T1G sacrifices voltage rating for current capacity, making it viable only in sub-40 V applications despite its higher I_C rating.

Availability

BC856BS/ZLX is available at Aetrix Electronics and suitable for LED driver circuits, dual-channel level shifters, redundant power switches, and audio signal inverter pairs requiring stable component supply and consistent parametric performance across production batches.

Supply support for BC856BS/ZLX 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 essential semiconductors-including discretes, logic, and MOSFETs-with manufacturing rooted in process optimization and automotive-grade quality systems.

The BC856BS belongs to Nexperia's general-purpose bipolar transistor family, engineered for space-constrained consumer, industrial, and computing applications demanding predictable gain matching, low thermal resistance, and robust SMT manufacturability.

FAQ

What is the maximum continuous collector current per transistor in BC856BS/ZLX?

The absolute maximum continuous collector current per transistor is −100 mA, as defined in Table 5 (Limiting values) under I_C. This rating applies at T_amb ≤ 25 °C with proper PCB thermal relief; derating is required above 25 °C per the 416 K/W R_th(j-a) curve in Figure 1.

Does BC856BS/ZLX support operation at −55 °C ambient temperature?

Yes-BC856BS/ZLX is fully specified from −55 °C to +150 °C ambient (Table 5, T_amb). Key parameters including h_FE, V_CE(sat), and leakage currents are characterized across this range, with Figures 3–7 confirming stable behavior at −55 °C.

Can BC856BS/ZLX replace two discrete BC856B transistors in a design?

Yes-BC856BS/ZLX is the monolithic dual version of BC856B, sharing identical per-transistor specifications (V_CEO, I_C, h_FE, V_CE(sat)) and pin-compatible with SOT363-3 footprint. Its integrated construction eliminates inter-device parameter variation and saves PCB area versus two SOT23 devices.

What is the marking code for BC856BS/ZLX on the package?

The top-side marking is %E6, where "%" is a placeholder for the manufacturing site code and "E6" uniquely identifies the BC856BS type per Table 4. This marking appears on the transparent top view of the TSSOP6 package, aligned with pin 1 index.