Infineon Technologies PZTA42E6327HTSA1

Overview

PZTA42E6327HTSA1 from Infineon Technologies is an NPN silicon high-voltage transistor rated for V_CEO = 300 V, I_C = 500 mA, and P_tot = 1.5 W at T_S ≤ 124 °C, with h_FE ≥ 25 at I_C = 1 mA. It features low V_CE(sat) = 0.5 V (I_C = 20 mA, I_B = 2 mA) and f_T = 70 MHz, used in high-voltage switching and linear amplification stages of industrial power supplies.

For engineers reviewing the PZTA42E6327HTSA1 datasheet, PZTA42E6327HTSA1 pinout, PZTA42E6327HTSA1 application, or PZTA42E6327HTSA1 equivalent, key selection criteria include breakdown voltage margin, thermal resistance R_thJS ≤ 17 K/W, saturation voltage under drive conditions, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device operates as a high-voltage NPN bipolar junction transistor optimized for switching and linear amplifier roles where robust V_CEO/V_CBO = 300 V and low saturation loss are required. Its complementary PNP counterpart is PZTA92, enabling push-pull configurations in HV driver circuits.

Designed for surface-mount use in SOT-223 package, it supports continuous collector current up to 500 mA with DC current gain h_FE ranging from 25 (I_C = 1 mA) to 40 (I_C = 10–30 mA), and exhibits C_cb = 3 pF at V_CB = 20 V, supporting stable high-frequency operation up to 70 MHz.

Key Specifications

Pinout & Package

Supplied in SOT-223 package with 4 terminals: Pin 1 = Base (B), Pin 2 = Collector (C), Pin 3 = Emitter (E), Pin 4 = Collector (C). The dual-collector configuration improves thermal and current-handling capability by paralleling internal die connections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MJD42T4G and BCP56-16, PZTA42E6327HTSA1 delivers superior voltage headroom, tighter h_FE consistency, lower thermal resistance, and automotive-grade reliability-making it optimal for safety-critical or high-input-voltage industrial switching.

Availability

PZTA42E6327HTSA1 is available at Aetrix Electronics and suitable for industrial power supplies, automotive HVAC controllers, telecom line protection circuits, and high-voltage linear amplifiers requiring stable component supply and long-term lifecycle support.

Supply support for PZTA42E6327HTSA1 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs and discrete devices.

PZTA42E6327HTSA1 belongs to Infineon's high-voltage bipolar transistor product line, designed specifically for robust switching and amplification in automotive, industrial, and telecom infrastructure where voltage resilience and AEC-Q101 compliance are mandatory.

FAQ

Is PZTA42E6327HTSA1 RoHS-compliant and lead-free?

Yes. The device uses a Pb-free (RoHS-compliant) SOT-223 package, confirmed in Infineon's official documentation and material declarations. All plating and terminations meet EU Directive 2011/65/EU requirements without exemptions.

What is the maximum allowable junction temperature and how does it relate to PCB layout?

The absolute maximum junction temperature is 150 °C. To maintain safe operation, PCB layout must provide adequate copper area on the collector pad (Pins 2 and 4) to achieve R_thJS ≤ 17 K/W. A minimum 25 mm² of 2-oz copper connected to Pins 2/4 is recommended per Infineon Application Note AN077.

Can PZTA42E6327HTSA1 replace BC548 or 2N2222 in high-voltage circuits?

No. BC548 and 2N2222 have V_CEO ≤ 30 V and I_C ≤ 100 mA-orders of magnitude lower than PZTA42E6327HTSA1's 300 V/500 mA rating. Substitution would cause immediate breakdown or thermal runaway in high-voltage applications.

Does this transistor require a base resistor in switching applications?

Yes. For reliable saturation at I_C = 20 mA, a base current of ≥2 mA is required. With typical V_BE(sat) ≈ 0.9 V, a 2.2 kΩ resistor from 5 V logic provides ~1.8 mA-sufficient for most digital-drive scenarios. Undriven base risks partial turn-on and thermal failure.