onsemi PN2907A_J18Z

Overview

PN2907A_J18Z from ON Semiconductor is a 60 V PNP bipolar junction transistor designed for general-purpose amplification and switching in low-to-medium power circuits, with confirmed DC current gain (hFE) of 100–300 at IC = −150 mA, VCE = −10 V; collector-emitter saturation voltage (VCE(sat)) ≤ −0.4 V at IC = −150 mA, IB = −15 mA; and maximum turn-on time (ton) of 45 ns - used in discrete logic-level switching and analog signal conditioning stages.

For engineers reviewing the PN2907A_J18Z datasheet, pinout, applications, or equivalent options, this page delivers verified package mapping (TO-92 3L, J61Z lead form), absolute maximum ratings, switching timing data, thermal resistance (RθJA = 200 °C/W), and real-world design implications for biasing, drive strength, and thermal derating in PCB-constrained systems.

Technical Context

The PN2907A_J18Z operates as a standard PNP BJT with base-controlled current amplification, requiring negative base-emitter bias (VEB > 0 V) to conduct. Its complementary NPN counterpart is the PN2222A, enabling push-pull configurations. It supports continuous collector current up to −800 mA and withstands −60 V across collector-emitter and collector-base terminals.

Switching performance is characterized by ton ≤ 45 ns and toff ≤ 100 ns under specified test conditions (VCC = −30 V, IC = −150 mA, IB1 = −15 mA), with storage time (ts) dominating turn-off behavior at 80 ns. Small-signal fT ≥ 200 MHz confirms suitability for RF-coupled preamplifier stages up to mid-VHF range.

Key Specifications

Pinout & Package

PN2907A_J18Z uses the TO-92 3-lead molded package with J61Z lead form (0.200″ inline spacing), compliant with JEDEC TO-92 standards. Pin identification follows EBC configuration: Emitter (Pin 1), Base (Pin 2), Collector (Pin 3), with leads arranged in straight-line formation suitable for through-hole mounting and automated insertion.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PN2907A_J18Z, MMBT2907A trades thermal performance for miniaturization, while PZT2907A provides superior power handling in a larger surface-mount format - neither is pin-compatible, and all three require distinct PCB footprints and layout strategies.

Availability

PN2907A_J18Z is available at Aetrix Electronics and suitable for motor control interfaces, discrete logic-level shifting, analog signal amplification, and power supply sequencing requiring stable component supply, long-term obsolescence planning, and traceable sourcing.

Supply support for PN2907A_J18Z 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

ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensors, and discrete devices, with roots in Fairchild Semiconductor's legacy of high-reliability discrete components.

PN2907A_J18Z belongs to ON Semiconductor's general-purpose bipolar transistor product line, engineered for cost-sensitive, high-volume applications demanding proven reliability, wide temperature operation, and straightforward biasing in industrial and consumer electronics.

FAQ

What is the pin configuration of PN2907A_J18Z?

PN2907A_J18Z uses the TO-92 package with J61Z lead form and EBC pinout: Pin 1 is Emitter, Pin 2 is Base, and Pin 3 is Collector. This configuration is standardized across Fairchild/ON Semiconductor's PN2907A family and verified in the official package drawing ZA03F. The straight-line 0.200″ lead spacing supports both manual soldering and wave solder processes.

Does PN2907A_J18Z support switching at 1 MHz?

Yes, PN2907A_J18Z supports switching at 1 MHz in practical designs when driven with adequate base current (IB ≥ IC / hFE(min)) and loaded with ≤ 1 kΩ. Its 45 ns turn-on and 100 ns turn-off times yield a theoretical maximum duty-cycle-limited frequency near 2 MHz, though layout parasitics and thermal effects typically limit reliable operation to 0.5–1.2 MHz in production systems using PN2907A_J18Z.

What is the maximum power dissipation for PN2907A_J18Z at 70°C ambient?

At 70°C ambient, PN2907A_J18Z has a derated power dissipation of 405 mW. This is calculated from its 625 mW rated PD at 25°C and 5.0 mW/°C derating factor: 625 mW − (5.0 mW/°C × (70 − 25)°C) = 405 mW. Exceeding this risks junction temperature exceeding 150°C, triggering thermal runaway or accelerated aging of PN2907A_J18Z.

Can PN2907A_J18Z replace BC557 in existing designs?

PN2907A_J18Z can functionally replace BC557 in many linear and switching applications due to matching VCEO (−60 V vs −65 V), IC (−800 mA vs −100 mA), and hFE range (100–300 vs 125–800), but its higher current rating and different package (TO-92 J61Z vs TO-92 AB) require verification of mechanical fit, thermal margin, and drive strength. BC557's tighter hFE binning may offer better consistency in precision biasing where PN2907A_J18Z is less optimal.

Is PN2907A_J18Z suitable for automotive applications?

PN2907A_J18Z is qualified for operation from −55 °C to +150 °C junction temperature and meets industrial reliability standards, but it is not AEC-Q101 qualified. While used in non-safety-critical automotive subsystems (e.g., cabin lighting controls, HVAC actuators), PN2907A_J18Z should not be deployed in ADAS, powertrain, or safety-related functions without additional qualification testing and failure mode analysis per ISO 26262 requirements.