Nexperia USA Inc. BCV61A,215

Overview

BCV61A,215 from Nexperia is an NPN general-purpose double transistor in SOT143B package, configured as a matched pair of monolithic NPN transistors (TR1 and TR2) sharing thermal coupling for stable current mirroring. It supports ≤30 V V_CEO, ≤100 mA I_C, and delivers h_FE = 110–220 at I_C = 2 mA, V_CE = 5 V. Used in precision analog biasing circuits where temperature-independent operating points are required.

For engineers reviewing the BCV61A,215 datasheet, BCV61A,215 pinout, BCV61A,215 application, or BCV61A,215 equivalent, this device is selected for matched-pair functions requiring tight DC current gain tracking, low V_CE(sat) at 10–100 mA, and minimal thermal drift across dual transistors on one die.

Technical Context

The BCV61A,215 integrates two electrically isolated but thermally coupled NPN transistors on a single silicon die, enabling precise current ratio matching (IC1/IE2 = 0.7–1.3) over −55 °C to +150 °C ambient. Its design eliminates inter-device thermal gradients common in discrete pairs.

Each transistor exhibits V_BE = 580–700 mV at I_C = 2 mA, V_CE = 5 V, with V_CE(sat) ≤ 250 mV at I_C = 10 mA / I_B = 0.5 mA and ≤ 600 mV at I_C = 100 mA / I_B = 5 mA - critical for low-loss active load and mirror configurations.

Key Specifications

Pinout & Package

SOT143B is a 4-lead surface-mount plastic package (3.0 × 1.25 mm footprint, 1.1 mm height) with gull-wing leads optimized for reflow soldering. Pin 1 is collector of TR2 and base of both transistors; Pin 2 is collector of TR1; Pin 3 is emitter of TR1; Pin 4 is emitter of TR2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar matched-pair NPN transistor applications.

Compared with BCV61A,215, BCV61B,215 offers improved gain consistency for mid-range accuracy needs, while BCV61C,215 delivers maximum h_FE for minimizing base current error - all retain identical pinout, matching, and thermal performance.

Availability

BCV61A,215 is available at Aetrix Electronics and suitable for current mirror circuits, temperature-stable bias generators, differential amplifier active loads, and low-voltage LED driver current sources requiring stable component supply and guaranteed traceability.

Supply support for BCV61A,215 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, reliability, and miniaturization.

The BCV61 series belongs to Nexperia's general-purpose bipolar transistor product line, designed specifically for matched-pair analog functions including current mirroring, bias stabilization, and precision active loads in space-constrained applications.

FAQ

What is the maximum allowable power dissipation for BCV61A,215 on a standard FR4 PCB?

The BCV61A,215 has a total power dissipation limit of 250 mW at T_amb ≤ 25 °C when mounted on FR4. This is constrained by its R_th(j-a) of 500 K/W - exceeding this value risks junction temperatures above 150 °C even at room ambient, especially under sustained 100 mA collector current.

How does the BCV61A,215 achieve better current matching than discrete transistor pairs?

BCV61A,215 achieves superior matching through monolithic integration: both NPN transistors share the same silicon die, ensuring identical process variations, doping profiles, and thermal coupling. This yields IC1/IE2 = 0.7–1.3 across −55 °C to +150 °C - far tighter than discrete pairs subject to layout-induced thermal gradients and process spread.

Can BCV61A,215 be used in complementary PNP/NPN configurations?

No - BCV61A,215 contains only NPN transistors. Its PNP complement is the BCV62A,215, which shares the same SOT143B package and pinout but with reversed polarity. Direct substitution is not possible; circuit redesign is required to accommodate complementary device characteristics and biasing.

What is the significance of Pin 1 serving as both TR2 collector and shared base?

Pin 1's dual role enables compact cascode and current-mirror topologies: the shared base ensures synchronized turn-on, while TR2's collector provides a second output node for feedback or load connection. This architecture reduces external component count in bias networks and improves high-frequency stability by minimizing base-node impedance.