onsemi PZT2907A

Overview

PZT2907A from onsemi is a 60 V PNP bipolar junction transistor in SOT-223 package, rated for continuous collector current up to −800 mA and total power dissipation of 1000 mW at 25°C. It delivers DC current gain (h_FE) of 100–300 at IC = −150 mA, V_CE = −10 V, with f_T ≥ 200 MHz, and is used as a general-purpose amplifier or switch in space-constrained industrial control and power management circuits.

For engineers reviewing the PZT2907A datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal characteristics, switching timing data, SOT-223 terminal mapping, and validated alternative transistors for design-in and BOM optimization.

Technical Context

The PZT2907A operates as a medium-power PNP BJT with V_CEO = −60 V and V_EBO = −5.0 V, supporting robust blocking capability in high-side switching configurations. Its h_FE range (100–300) and low V_CE(sat) (−0.4 V at I_C = −150 mA, I_B = −15 mA) enable efficient linear amplification and saturated switching across −40°C to +125°C ambient conditions.

Thermal performance is defined by R_θJA = 125°C/W on FR-4 PCB (76 × 114 × 1.57 mm), enabling stable operation up to T_J = 150°C. Switching behavior is characterized by t_on ≤ 45 ns and t_off ≤ 100 ns under specified bias conditions, making it suitable for moderate-speed digital logic interfacing and PWM-driven loads.

Key Specifications

Pinout & Package

SOT-223 package features a 4-lead molded configuration with lead 4 (tab) electrically connected to the collector for enhanced thermal conduction and mechanical mounting. The package measures 6.7 × 3.7 × 1.8 mm and supports surface-mount reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBT2907A and PN2907A, the PZT2907A uniquely combines SMT compatibility, 1000 mW power capability, and low thermal resistance-making it the only variant in the family qualified for production use in thermally dense, high-current industrial PCBs.

Availability

PZT2907A is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and LED driver interface applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across manufacturing lots.

Supply support for PZT2907A 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The PZT2907A belongs to onsemi's general-purpose bipolar transistor product line, designed specifically for cost-sensitive, high-reliability discrete switching and amplification in space-constrained surface-mount systems.

FAQ

What is the maximum continuous collector current for the PZT2907A?

The PZT2907A supports a maximum continuous collector current (I_C) of −800 mA at T_A = 25°C. This rating assumes proper PCB thermal management using the SOT-223 tab connection. Derating applies above 25°C at 8.0 mW/°C, limiting usable current in high-ambient environments unless additional copper area or airflow is provided. The PZT2907A achieves this higher current rating compared to the SOT-23 MMBT2907A (−600 mA) due to its superior thermal interface.

Is the PZT2907A pin-compatible with the MMBT2907A or PN2907A?

No-the PZT2907A uses a 4-lead SOT-223 package with collector connected to the thermal tab (pin 4), while the MMBT2907A uses a 3-lead SOT-23 and the PN2907A uses a 3-lead TO-92. Pin assignments differ across packages: PZT2907A has E-B-C-Tab order, MMBT2907A is E-B-C, and PN2907A is E-B-C in TO-92 orientation. PCB layout and footprint must be redesigned for each variant; no drop-in replacement exists between them.

What is the typical DC current gain (h_FE) of the PZT2907A at 150 mA collector current?

The PZT2907A exhibits a DC current gain (h_FE) of 100–300 when tested at I_C = −150 mA and V_CE = −10 V. This wide gain spread reflects process variation and must be accounted for in base drive design-e.g., a worst-case h_FE of 100 requires ≥1.5 mA base current to saturate a 150 mA load. The PZT2907A maintains this gain range across −40°C to +125°C, unlike lower-rated variants that degrade faster at temperature extremes.

Can the PZT2907A be used in linear amplifier configurations?

Yes-the PZT2907A is characterized for linear operation with h_FE, V_CE(sat), and small-signal parameters (f_T, C_ob, C_ib) specified across bias conditions. Its f_T ≥ 200 MHz and low output capacitance (8.0 pF) support stable common-emitter amplification up to ~50 MHz. However, thermal stability in Class-A operation requires careful attention to the 125°C/W R_θJA and must include adequate copper pour under the tab to avoid thermal runaway.

Does the PZT2907A have built-in ESD protection?

The PZT2907A does not integrate dedicated on-chip ESD protection diodes. Its absolute maximum ratings specify V_EBO = −5.0 V and V_CEO = −60 V, but human-body-model (HBM) ESD rating is not published in the datasheet. For applications exposed to handling or system-level transients (e.g., automotive or industrial interfaces), external TVS diodes or series resistors are recommended. The PZT2907A's rugged bipolar construction offers inherent tolerance to short-duration overvoltage, but not certified ESD immunity.