onsemi PN5138_D26Z

Overview

PN5138_D26Z from Fairchild Semiconductor is a PNP general-purpose bipolar junction transistor (BJT) designed for amplification and switching in low-to-medium power circuits, with confirmed V_CEO = 30 V, I_C = 500 mA continuous, h_FE = 50–800 at I_C = 10 mA, V_CE(sat) = 0.3 V, and TO-92 package. It serves in discrete signal conditioning, load switching, and interface driver stages where robust DC gain and moderate current handling are required.

For engineers reviewing the PN5138_D26Z datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, TO-92 mechanical compatibility, guaranteed h_FE range across operating currents, thermal resistance (R_θJA = 200 °C/W), and saturation voltage under defined drive conditions.

Technical Context

This device operates as a silicon PNP BJT fabricated on Fairchild's Process 68, optimized for general-purpose linear amplification and saturated switching. Its electrical behavior is defined by three critical OFF-state breakdown ratings - V_(BR)CEO, V_(BR)CBO, and V_(BR)EBO - all specified at 30 V, 30 V, and 5.0 V respectively, with validated leakage limits (I_CBO ≤ 50 nA at 25°C).

ON-state performance is characterized by V_CE(sat) = 0.3 V and V_BE(sat) = 1.0 V at I_C = 10 mA / I_B = 0.5 mA, and small-signal h_fe = 40 at 1 kHz (I_C = 1 mA), supporting stable biasing in Class-A amplifiers and reliable turn-on in digital logic interface applications.

Key Specifications

Pinout & Package

PN5138_D26Z is housed in a standard TO-92 plastic package with straight leads and no lead clip (EOL code D26Z denotes tape-and-reel packaging per Fairchild's TO-92 TNR specification). The device uses the conventional TO-92 pinout orientation: viewed from the flat side with leads down, left-to-right pins are Emitter (E), Base (B), Collector (C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPSA92 and BC807-40, PN5138_D26Z offers balanced gain, proven thermal performance in through-hole layouts, and direct compatibility with legacy TO-92 footprints-making it optimal for cost-sensitive, medium-power discrete designs where manual assembly or serviceability matters.

Availability

PN5138_D26Z is available at Aetrix Electronics and suitable for industrial relay drivers, discrete logic level shifters, linear audio pre-amplifiers, and power supply enable switches requiring stable component supply and long-term obsolescence management.

Supply support for PN5138_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 company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016. Its legacy products remain widely deployed in industrial and automotive systems.

PN5138_D26Z belongs to Fairchild's general-purpose bipolar transistor family, engineered for reliability and ease of use in non-critical amplification and switching functions across consumer, industrial, and computing applications.

FAQ

What is the pin configuration of PN5138_D26Z?

PN5138_D26Z uses the standard TO-92 pinout: when viewed from the flat side with leads pointing downward, the left-to-right pin order is Emitter (E), Base (B), Collector (C). This configuration is confirmed in Fairchild's TO-92 Tape and Reel Data documentation for EOL code D26Z and applies identically to the PN5138_D26Z variant.

Does PN5138_D26Z support switching at 100 kHz?

PN5138_D26Z is not characterized for 100 kHz switching. Its small-signal h_fe drops to 1.5 at 20 MHz, and Cob = 7.0 pF suggests usable bandwidth below ~5 MHz in common-emitter configurations. For 100 kHz PWM switching, verify turn-on/turn-off times experimentally; the device is intended for DC and low-frequency (<100 kHz) applications per its "general purpose amplifier" designation.

What is the maximum power dissipation for PN5138_D26Z at 60°C ambient?

At 60°C ambient, PN5138_D26Z must be derated from its 625 mW maximum at 25°C by 5.0 mW/°C. The allowable power is 625 mW − (5.0 mW/°C × 35°C) = 450 mW. This assumes still-air conditions and accounts for R_θJA = 200 °C/W; actual dissipation must stay below this value to keep junction temperature ≤150°C.

Is PN5138_D26Z RoHS compliant?

PN5138_D26Z is manufactured under Fairchild's legacy process and predates mandatory RoHS enforcement. While the TO-92 package contains no leaded solder in its construction, official RoHS certification is not documented for this specific part number in available datasheets or compliance databases. For new designs, consult ON Semiconductor's current equivalents or verify compliance status directly with authorized distributors.

Can PN5138_D26Z replace PN200 in circuit designs?

Yes - the datasheet explicitly states "See PN200 for characteristics", confirming PN5138_D26Z shares the same Process 68 fabrication and functional equivalence with PN200. Both devices exhibit identical absolute maximum ratings, thermal characteristics, and electrical parameters; PN5138_D26Z is a valid functional replacement for PN200 in all documented applications.