Infineon Technologies BCM856SH6433XTMA1

Overview

BCM856SH6433XTMA1 from Nexperia is a PNP silicon AF transistor array comprising two galvanically isolated, precision-matched PNP transistors in a single SOT363 package. It delivers ∆IC ≤ 10% matching at IB = 1 µA and VCE = 1.0 V, supports 65 V VCEO, 100 mA IC continuous, and features low VCEsat (90 mV typ. at IC = 10 mA, IB = 0.5 mA), enabling high-accuracy current mirror circuits in automotive sensor signal conditioning.

For engineers reviewing the BCM856SH6433XTMA1 datasheet, BCM856SH6433XTMA1 pinout, BCM856SH6433XTMA1 application, or BCM856SH6433XTMA1 equivalent, key selection criteria include matched-pair DC gain consistency, dual-isolation integrity, SOT363 thermal performance (RthJS = 140 K/W), AEC-Q101 qualification, and complementary pairing with BCM846S for push-pull or differential amplifier topologies.

Technical Context

This dual PNP transistor array implements two electrically isolated, monolithically integrated PNP BJTs on a single die-enabling precise current mirroring without external isolation components. Its matching specification (∆IC ≤ ±10%) is guaranteed under defined bias conditions (IB = 1 µA, VCE1 = VCE2 = 1.0 V), and its low saturation voltage supports efficient operation in linear and switching modes up to 100 mA.

The device operates across –65 °C to +150 °C storage range and is qualified per AEC-Q101 for automotive use. Thermal resistance from junction to soldering point is fixed at 140 K/W, and maximum power dissipation is 250 mW at TS = 115 °C-dictating PCB copper area and layout requirements for sustained load handling.

Key Specifications

Pinout & Package

SOT363 (SC-88) 6-pin surface-mount package with dual-transistor layout and galvanic isolation between channels. Pin 1 = E1, Pin 2 = B1, Pin 3 = C2, Pin 4 = E2, Pin 5 = B2, Pin 6 = C1 - verified per official Nexperia package outline EHA07175 and marking diagram.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCM846S, BCM856SH6433XTMA1 provides PNP polarity essential for high-side current sensing and rail-referenced biasing; compared with BC856BS, it adds matched-pair precision and dual isolation-critical for error-sensitive analog functions but at higher unit cost and footprint.

Availability

BCM856SH6433XTMA1 is available at Aetrix Electronics and suitable for automotive sensor interfaces, precision current mirrors, and differential amplifier front-ends requiring stable component supply, AEC-Q101 compliance, and matched-pair performance.

Supply support for BCM856SH6433XTMA1 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 logic, discrete, and MOSFET devices, with leadership in automotive-grade components and advanced packaging.

The BCM856S series belongs to Nexperia's AEC-Q101-qualified bipolar transistor portfolio, designed specifically for precision analog functions in automotive and industrial control systems requiring matched performance and galvanic isolation.

FAQ

What does "galvanic isolation" mean for the two transistors in BCM856SH6433XTMA1?

Galvanic isolation means the collectors, emitters, and bases of TR1 and TR2 are electrically separated by internal die insulation-no conductive path exists between them. This allows independent biasing, grounding, and load connections, preventing crosstalk and enabling true differential or isolated current mirror operation without external isolation components.

Can BCM856SH6433XTMA1 replace discrete BC856B transistors in existing designs?

It can replace two BC856B transistors only if the design benefits from monolithic matching (∆IC ≤ ±10%) and galvanic isolation. Pinout differs significantly (SOT363 vs. SOT23), so PCB layout and routing must be revised. Base drive and thermal design also differ due to shared package thermal resistance (RthJS = 140 K/W).

Is BCM856SH6433XTMA1 suitable for linear amplifier applications?

Yes-its fT = 250 MHz, hFE = 200–450, and low noise figure (10 dB at 1 kHz) support audio and low-frequency linear amplification. However, linearity must be validated per application, as the device is optimized for current mirroring; harmonic distortion and slew rate are not specified in the datasheet.

How is the "matching" parameter ∆IC measured and applied in practice?

∆IC is measured as (IC2 − IC1)/IC1 with both transistors biased identically (IB = 1 µA, VCE = 1.0 V). In practice, this ensures current mirrors track within ±10% error at that bias point; designers must verify matching holds across operating temperature and current ranges using the provided hFE and VBE curves.