Infineon Technologies PZTA42H6327XTSA1

Overview

PZTA42H6327XTSA1 from Infineon Technologies is an NPN silicon high-voltage bipolar junction transistor (BJT) designed for switching and amplification in high-voltage industrial and automotive power control circuits. It features V_CEO = 300 V, I_C = 500 mA, h_FE ≥ 25 (at I_C = 1 mA), V_CE(sat) ≤ 0.5 V (at I_C = 20 mA, I_B = 2 mA), and operates up to T_j = 150 °C in SOT-223 package.

For engineers reviewing the PZTA42H6327XTSA1 datasheet, PZTA42H6327XTSA1 pinout, PZTA42H6327XTSA1 application, or PZTA42H6327XTSA1 equivalent, key selection criteria include high-voltage breakdown capability, low saturation voltage under moderate current drive, thermal performance in surface-mount power switching, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This NPN BJT is optimized for linear and saturated switching in off-line power supplies, relay drivers, and high-side load switches where collector-emitter blocking above 250 V is required. Its complementary PNP counterpart is PZTA92, enabling push-pull configurations with matched voltage ratings and thermal behavior.

The device uses epitaxial planar technology with a robust emitter-base structure to sustain V_EBO = 6 V and maintain stable h_FE across I_C = 1–30 mA at V_CE = 10 V. f_T = 70 MHz supports medium-frequency amplification, while C_cb = 3 pF at V_CB = 20 V enables predictable switching transitions.

Key Specifications

Pinout & Package

SOT-223 package: 4-pin thermally enhanced plastic surface-mount outline with exposed collector tab (Pin 2 and Pin 4 both connected to collector). Standard pin assignment: Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, Pin 4 = Collector (dual-collector configuration).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCP56-10T1G and MJD42-1G, PZTA42H6327XTSA1 uniquely balances 300 V blocking, SOT-223 thermal efficiency, and AEC-Q101 compliance-making it optimal for space-constrained automotive and industrial high-voltage switching where reliability and thermal headroom are critical.

Availability

PZTA42H6327XTSA1 is available at Aetrix Electronics and suitable for industrial relay drivers, automotive LED lamp controllers, off-line SMPS feedback circuits, and high-voltage sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PZTA42H6327XTSA1 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.

The PZTA42 belongs to Infineon's high-voltage bipolar transistor family, engineered specifically for robust switching in automotive body electronics and industrial power interfaces where voltage endurance and thermal stability are non-negotiable.

FAQ

What is the maximum continuous collector current for PZTA42H6327XTSA1?

The absolute maximum continuous collector current is 500 mA at T_S ≤ 124 °C. Derating applies above this case temperature: total power dissipation drops linearly to zero at 150 °C junction temperature. Real-world sustained current depends on PCB copper area, ambient airflow, and thermal vias beneath the exposed collector pad.

Is PZTA42H6327XTSA1 pin-compatible with PZTA92?

No - PZTA42H6327XTSA1 is NPN with pinout Base–Collector–Emitter–Collector, while PZTA92 is its PNP complement with pinout Emitter–Collector–Base–Collector. Their pin assignments are inverted; direct substitution would reverse polarity and cause circuit failure unless board layout and biasing are redesigned.

Does PZTA42H6327XTSA1 require a base resistor in switching applications?

Yes - a base resistor is mandatory to limit I_B and ensure saturation without exceeding I_B(max) = 100 mA. For 20 mA I_C, a 4.7 kΩ resistor from 5 V MCU GPIO provides ~1 mA I_B, achieving h_FE-based saturation margin while avoiding excessive base charge storage delay.

Can PZTA42H6327XTSA1 be used in linear amplifier configurations?

Yes - its f_T = 70 MHz and stable h_FE across I_C = 1–30 mA support Class-A audio preamplifiers and precision current mirrors. However, thermal design must accommodate power dissipation: at V_CE = 10 V and I_C = 10 mA, P_D = 100 mW requires ≥ 2 cm² 2 oz. copper to hold T_j < 125 °C.