Nexperia USA Inc. BCX70J,215

Overview

BCX70J,215 from Nexperia is an NPN general-purpose bipolar junction transistor in SOT23 package, rated for 45 V V_CEO, 100 mA I_C, and 250 mW P_tot, with DC current gain (h_FE) of 250–460 at I_C = 2 mA and V_CE = 5 V. It serves as a low-voltage switching and small-signal amplification device in compact consumer and industrial control circuits.

For engineers reviewing the BCX70J,215 datasheet, BCX70J,215 pinout, BCX70J,215 application, or BCX70J,215 equivalent, key selection criteria include its SOT23 footprint compatibility, guaranteed h_FE range at 2 mA bias, V_CE(sat) ≤ 350 mV at I_C = 10 mA / I_B = 0.25 mA, and thermal resistance of 500 K/W on FR4 PCB - all critical for space-constrained linear and switching designs.

Technical Context

The BCX70J,215 operates as a standard silicon NPN BJT with epitaxial base construction, optimized for low-current analog amplification and digital switching up to ~100 MHz f_T. Its V_BE is specified at 550–750 mV under I_C = 2 mA, and C_c is tightly controlled at 1.7 pF max for stable high-frequency response.

It features low leakage: ICBO ≤ 20 nA at V_CB = 45 V and 25 °C, rising to ≤ 20 μA at 150 °C - enabling reliable operation across extended ambient ranges. The device shares pinout and package with BCX70G/H/K variants but is uniquely characterized for h_FE = 250–460 at I_C = 2 mA, distinguishing it within the BCX70 series.

Key Specifications

Pinout & Package

SOT23 plastic surface-mounted package (TO-236AB), 3-lead, 1.3 mm × 2.9 mm × 1.0 mm body, with gull-wing leads for reflow soldering. JEDEC-compliant outline per 2004-01-16 revision.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Compared with BCX70J,215, BC847BJ,215 offers nearly identical gain and voltage specs but with relaxed saturation voltage tolerance, while MMBT3904LT1G trades 5 V V_CEO margin and narrower h_FE range for wider global availability and lower unit cost in high-volume consumer builds.

Availability

BCX70J,215 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, audio preamplifiers, and power supply enable switching requiring stable component supply and consistent h_FE performance across production batches.

Supply support for BCX70J,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 leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets with emphasis on reliability and manufacturability.

The BCX70J,215 belongs to Nexperia's BCX70 series of general-purpose NPN transistors, designed specifically for cost-sensitive, space-constrained applications requiring guaranteed DC gain and low-voltage switching performance in SOT23 packaging.

FAQ

Is BCX70J,215 RoHS compliant and lead-free?

Yes, BCX70J,215 is RoHS compliant and lead-free per Nexperia's product documentation dated 2004 and confirmed in current manufacturing specifications. The SOT23 package uses lead-free matte tin plating on terminations, and the die attach and molding compound meet EU Directive 2011/65/EU requirements without exemptions.

What is the maximum safe operating temperature for BCX70J,215 in continuous DC operation?

The BCX70J,215 has a maximum junction temperature (T_j) of 150 °C and a thermal resistance R_th(j-a) of 500 K/W on FR4. At 25 °C ambient, maximum continuous DC power is 250 mW; derating begins above 25 °C at 0.5 mW/°C, limiting usable power to ~150 mW at 70 °C ambient.

Can BCX70J,215 replace BCX70H in an existing design?

BCX70J,215 can replace BCX70H only if the circuit relies on h_FE ≥ 250 at I_C = 2 mA. BCX70H specifies h_FE = 180–310 in that condition, so BCX70J offers higher minimum gain but may alter bias point stability in precision amplifier designs calibrated for BCX70H's lower h_FE floor.

Does BCX70J,215 have a documented PNP complement?

Yes, the BCX71J is the direct PNP complement to BCX70J, sharing identical SOT23 package, voltage ratings (−45 V V_ECO), current capability (−100 mA I_C), and h_FE range (250–460 at I_C = −2 mA), enabling matched pair use in push-pull and differential amplifier topologies.