Nexperia USA Inc. PMBTA42,215

Overview

PMBTA42,215 from Nexperia is a 300 V, 100 mA NPN high-voltage transistor in SOT23 package, designed for switching and amplification in high-voltage signal paths. It delivers 40 minimum DC current gain at 30 mA collector current, supports 500 mV max V_CE(sat), and operates up to 150 °C junction temperature. Used in telephony line interface circuits requiring robust voltage handling.

For engineers reviewing the PMBTA42,215 datasheet, PMBTA42,215 pinout, PMBTA42,215 application, or PMBTA42,215 equivalent, key selection criteria include its AEC-Q101 qualification, 300 V V_CEO rating, SOT23 thermal resistance (500 K/W), and complementary PNP pairing with PMBTA92.

Technical Context

The PMBTA42,215 is a silicon NPN bipolar junction transistor optimized for high-voltage linear and switching operation. Its 300 V V_CEO and 300 V V_CBO ratings enable use in off-hook detection and ringing circuits where transient overvoltage immunity is critical.

With 40–100 h_FE at 30 mA I_C, it provides stable current amplification under bias conditions typical in telecom line cards. The 50 MHz f_T and 3 pF C_re support moderate-frequency signal conditioning without parasitic oscillation risk.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body. Designed for reflow soldering per IPC-7095 standards with defined footprint (sot023_fr).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage NPN transistor applications.

Compared with BC847B,215 and PMBTA44,215, the PMBTA42,215 uniquely balances 300 V capability with AEC-Q101 qualification and 100 mA I_C in SOT23-making it optimal for cost-sensitive, high-reliability telecom line cards where 400 V headroom is unnecessary.

Availability

PMBTA42,215 is available at Aetrix Electronics and suitable for telephone line interface, off-hook detection, ringing signal amplification, and isolated relay driver applications requiring stable component supply and automotive-grade reliability.

Supply support for PMBTA42,215 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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

The PMBTA42,215 belongs to Nexperia's high-voltage bipolar transistor product line, engineered specifically for telecom infrastructure, industrial control, and automotive body electronics demanding robust voltage tolerance and AEC-Q101 compliance.

FAQ

Is PMBTA42,215 pin-compatible with PMBTA92?

No-PMBTA42,215 is an NPN device with pinout Base-Emitter-Collector (1-2-3), while PMBTA92 is its PNP complement with reversed polarity and identical SOT23 pin assignment (Emitter-Base-Collector). They share footprint and mounting but require opposite biasing and cannot be substituted without circuit redesign.

What is the maximum allowable power dissipation at 85 °C ambient?

At 85 °C ambient, derated power dissipation is 137.5 mW, calculated using R_th(j-a) = 500 K/W and T_j(max) = 150 °C: P_tot = (150 − 85) / 500 = 0.13 W. This assumes standard FR4 PCB mounting with single-sided 1 oz copper.

Does PMBTA42,215 support pulsed operation above 100 mA?

Yes-its I_CM (peak collector current) is rated at 200 mA for single pulses ≤1 ms, enabling short-duration surge handling in line fault detection or transient suppression circuits without thermal runaway.

Can PMBTA42,215 replace BCW66 in existing designs?

No-BCW66 has V_CEO = 65 V and TO-92 package, making it incompatible with 300 V line applications and SOT23 layout. Substitution would require PCB redesign, voltage derating, and revalidation of surge immunity and thermal performance.