Nexperia USA Inc. BCV47,235

Overview

BCV47 from Nexperia is an NPN Darlington transistor in SOT23 (TO-236AB) package, designed for medium-current preamplifier input stages with 60 V V_CES, 500 mA I_C, and minimum h_FE of 2000 at 500 mA. It delivers high DC current gain for low-base-drive signal amplification in space-constrained analog front-ends.

For engineers reviewing the BCV47 datasheet, BCV47 pinout, BCV47 application, or BCV47 equivalent, this page provides verified pin functions, thermal resistance (500 K/W), saturation voltage (1 V @ 100 mA/1 mA), breakdown ratings (80 V V_CBO, 60 V V_CES), and confirmed PNP complement BCV26 - all validated against Nexperia's October 2022 product data sheet.

Technical Context

The BCV47 integrates two cascaded NPN transistors in a monolithic Darlington configuration, enabling ultra-high current gain (h_FE ≥ 10,000 at 100 mA) with single-base control. Its V_CES = 60 V and V_CBO = 80 V support operation in low-to-medium voltage analog amplification circuits where base drive efficiency is critical.

Thermal performance is defined for FR4 PCB mounting (single-sided copper, tin-plated), yielding R_th(j-a) = 500 K/W. The device operates across –65 °C to +150 °C ambient and junction temperature, with pulse-tested h_FE and V_CE(sat) values specified under tp ≤ 300 μs, δ ≤ 0.02 conditions.

Key Specifications

Pinout & Package

BCV47 uses the SOT23 (TO-236AB) surface-mount plastic package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body, optimized for automated reflow assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN Darlington transistor applications.

Compared with BCV27 and MMDT3904, BCV47 uniquely delivers Darlington-level gain (≥2000) at 500 mA while maintaining SOT23 footprint - making it irreplaceable in space-constrained, low-base-drive amplification or switching roles where single-transistor alternatives cannot meet current or gain requirements.

Availability

BCV47 is available at Aetrix Electronics and suitable for audio preamplifier input stages, industrial sensor signal conditioning, and relay driver interfaces requiring stable component supply and consistent SOT23 packaging.

Supply support for BCV47 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, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.

BCV47 belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-sensitive, space-constrained analog signal amplification and interface applications in industrial and consumer electronics.

FAQ

Is BCV47 automotive-qualified?

No. Per Nexperia's October 2022 data sheet revision history, BCV47 was explicitly changed to non-automotive qualification in v.4. It lacks AEC-Q101 testing and is not approved for safety-critical or vehicle-mounted systems. Automotive alternatives must be selected from Nexperia's dedicated automotive-Q portfolio.

What is the maximum allowable base current for BCV47?

The peak base current (I_BM) is rated at 100 mA per Table 5. Exceeding this value risks permanent damage. For continuous operation, base current should be sized to maintain I_C ≤ 500 mA while respecting h_FE minima - e.g., ≥250 µA base drive needed for 500 mA collector current at h_FE = 2000.

Can BCV47 replace BC547 in existing designs?

No. BC547 is a single NPN transistor (h_FE ≈ 110–800, I_C = 100 mA), whereas BCV47 is a Darlington with 20× higher gain and 5× higher current rating. Substituting BCV47 may cause unintended saturation, excessive power dissipation, or instability due to gain mismatch and different V_BE characteristics (1.4 V vs. ~0.7 V).

Does BCV47 require a heatsink in standard SOT23 mounting?

Not for continuous I_C ≤ 100 mA at Tamb ≤ 25 °C, given its 250 mW P_tot and 500 K/W R_th(j-a). At 500 mA, junction temperature rise exceeds safe limits without board-level thermal enhancement - e.g., increased copper area, thermal vias, or forced airflow. Derating curves in Figure 1 of the datasheet must be applied for sustained high-current operation.