onsemi PN2484_D26Z

Overview

PN2484_D26Z from Fairchild Semiconductor is an NPN general-purpose amplifier transistor in TO-92 package, rated for V_CEO = 60 V, I_C = 100 mA, and h_FE = 30–800 (depending on I_C), optimized for low-noise, high-gain amplification at collector currents from 1 µA to 50 mA in discrete analog signal chains.

For engineers reviewing the PN2484_D26Z datasheet, pinout, applications, or equivalent options, key selection considerations include its 60 V breakdown rating, 3.0 dB noise figure at 1 kHz, TO-92 mechanical compatibility, thermal resistance of 357 °C/W on FR-4, and suitability for low-current linear amplification stages.

Technical Context

The PN2484_D26Z implements a silicon planar NPN bipolar junction structure fabricated in Fairchild's Process 07, sharing electrical characteristics with the 2N5088 family. It operates across –55°C to +150°C junction temperature range and supports continuous DC biasing up to 100 mA collector current.

Its small-signal behavior is defined by C_obo = 6.0 pF and C_ibo = 6.0 pF at specified test conditions, with V_BE(on) = 0.5–0.7 V at I_C = 100 µA and V_CE = 5.0 V, enabling predictable biasing in emitter-follower and common-emitter configurations.

Key Specifications

Pinout & Package

PN2484_D26Z is supplied in the through-hole TO-92 package (FS PKG Code 92), with lead configuration C-B-E (Collector–Base–Emitter) when viewed from the flat side with leads pointing downward.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose amplifier applications.

Compared with 2N5088 and MMBT2484, PN2484_D26Z offers identical core amplification performance in TO-92 through-hole packaging, making it suitable for prototyping, repair, and legacy through-hole manufacturing-while differing from MMBT2484 in mounting method and from 2N5088 only in marking and traceability.

Availability

PN2484_D26Z is available at Aetrix Electronics and suitable for audio pre-amplifiers, industrial sensor interfaces, low-power oscillators, and discrete RF detector biasing requiring stable component supply and long-term obsolescence management.

Supply support for PN2484_D26Z 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

Fairchild Semiconductor was a U.S.-based semiconductor manufacturer specializing in discrete power devices, analog ICs, and interface solutions before its acquisition by ON Semiconductor in 2016.

The PN2484_D26Z belongs to Fairchild's legacy NPN general-purpose amplifier product line, designed specifically for low-noise, high-gain linear amplification in cost-sensitive analog signal paths.

FAQ

What is the pinout configuration of PN2484_D26Z?

PN2484_D26Z uses the standard TO-92 pinout with Collector–Base–Emitter (C–B–E) arrangement when viewed from the flat side with leads pointing downward. This matches JEDEC TO-92 outline and is confirmed in Fairchild's PN2484/MMBT2484 Rev B datasheet Figure 1.0. The marking "1U" appears on the flat side adjacent to the emitter lead.

Does PN2484_D26Z support operation at elevated temperatures?

Yes, PN2484_D26Z is rated for junction temperatures from –55°C to +150°C, with thermal resistance R_θJA = 357 °C/W on standard FR-4 PCB. Its absolute maximum ratings specify this full range, and electrical characteristics are guaranteed at TA = 25°C unless otherwise noted-making PN2484_D26Z suitable for under-hood automotive and industrial control applications.

Is PN2484_D26Z electrically identical to MMBT2484?

Yes, PN2484_D26Z and MMBT2484 share identical electrical specifications-including V_CEO, h_FE, NF, and C_obo-as both derive from the same Process 07 die. However, PN2484_D26Z is packaged in TO-92, while MMBT2484 uses SOT-23. Therefore, PN2484_D26Z requires through-hole assembly and has different thermal and mechanical behavior despite matching electrical performance.

What is the noise performance of PN2484_D26Z at low collector currents?

PN2484_D26Z achieves a noise figure of 3.0 dB at I_C = 10 µA, V_CE = 5.0 V, R_S = 10 kΩ, f = 1.0 kHz, and BW = 200 Hz. This low-noise capability at microampere bias levels makes PN2484_D26Z especially effective in ultra-low-power pre-amplifier stages where minimizing added noise is critical to system SNR.

Can PN2484_D26Z replace 2N5088 in existing designs?

Yes, PN2484_D26Z is functionally and mechanically interchangeable with 2N5088: both use TO-92 packaging, share Process 07 fabrication, and exhibit identical absolute maximum ratings and electrical characteristics per Fairchild documentation. PN2484_D26Z may be used as a direct replacement in any 2N5088-based circuit without layout or schematic modification.