onsemi TN6727A_D74Z

Overview

TN6727A_D74Z from Fairchild Semiconductor is a PNP general-purpose bipolar junction transistor designed for medium-power amplification and switching applications, with 1.5 A continuous collector current, 40 V V_CEO, 50 V V_CBO, and TO-226 (TO-92) package. It operates across –55°C to +150°C junction temperature range and delivers h_FE ≥ 50 at I_C = 1 A, supporting industrial relay drivers and DC motor control stages.

For engineers reviewing the TN6727A_D74Z datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CE(sat) ≤ 0.5 V at I_C = 1 A / I_B = 100 mA, guaranteed h_FE minima across three current levels, and thermal resistance R_θJA = 125°C/W in free-air conditions.

Technical Context

The TN6727A_D74Z is a silicon PNP BJT fabricated on Fairchild's Process 77, optimized for linear amplification and saturated switching in medium-current analog and power interface circuits. Its V_BE(on) = 1.2 V at I_C = 1 A and V_CE = 1 V enables predictable base drive design, while C_cb = 30 pF at V_CB = 10 V supports stable operation up to 20 MHz small-signal gain bandwidth.

It features low leakage: I_CBO ≤ 100 nA at V_CB = 50 V and I_EBO ≤ 100 nA at V_EB = 5 V, ensuring reliable cutoff in high-impedance bias networks. The device's R_θJC = 50°C/W allows effective heat transfer to heatsink-mounted leads when used in thermally constrained PCB layouts.

Key Specifications

Pinout & Package

Package: TO-226 (TO-92), through-hole, epoxy-molded, 3-lead plastic case with standard EIAJ outline. Leads are arranged in straight-line configuration with emitter (E), base (B), and collector (C) identified per marking orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MJD2955G and BC557B, the TN6727A_D74Z uniquely balances 1.5 A capability, TO-92 manufacturability, and verified V_CE(sat) ≤ 0.5 V - making it optimal for cost-sensitive, space-constrained industrial controls requiring reliable medium-current switching without TO-220 thermal overhead.

Availability

TN6727A_D74Z is available at Aetrix Electronics and suitable for industrial motor control, relay interface modules, and linear regulator pass elements requiring stable component supply, long-term obsolescence planning, and JEDEC-standard through-hole compatibility.

Supply support for TN6727A_D74Z 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 devices before its acquisition by ON Semiconductor in 2016. Its legacy BJT portfolio remains widely deployed in industrial and automotive systems.

The TN6727A_D74Z belongs to Fairchild's general-purpose PNP transistor family engineered for robust medium-power switching and amplification in cost-sensitive industrial equipment, where reliability across –55°C to +150°C and proven process consistency are critical.

FAQ

What is the maximum continuous collector current rating for TN6727A_D74Z?

The TN6727A_D74Z has a maximum continuous collector current (I_C) rating of 1.5 A at T_A = 25°C. This rating assumes proper PCB copper area and ambient conditions; derating applies above 25°C at 12.5 mW/°C based on its 1 W total device dissipation limit. The TN6727A_D74Z maintains this rating within its specified –55°C to +150°C junction temperature range when thermal design accounts for R_θJA = 125°C/W.

Does TN6727A_D74Z support high-frequency amplification?

The TN6727A_D74Z exhibits a transition frequency (f_T) of 20 MHz at I_C = 50 mA, V_CE = 10 V, and f = 20 MHz, confirming usability in audio-frequency and low-MHz signal amplification. However, it is not optimized for RF or high-speed digital switching; its C_cb = 30 pF and h_fe roll-off above 1 MHz limit practical use to sub-10 MHz small-signal stages. For RF applications, dedicated RF transistors should be selected instead of the TN6727A_D74Z.

What is the guaranteed DC current gain (h_FE) range for TN6727A_D74Z?

The TN6727A_D74Z guarantees h_FE ≥ 50 at I_C = 1 A, ≥ 55 at I_C = 100 mA, and ≥ 60 at I_C = 10 mA - all measured at V_CE = 1 V and T_A = 25°C. This multi-point specification ensures predictable base drive requirements across operating currents, distinguishing it from generic gain bins. The TN6727A_D74Z does not specify minimum h_FE at I_C < 10 mA or above 1 A.

Can TN6727A_D74Z be used as a high-side switch?

Yes, the TN6727A_D74Z can function as a high-side switch in PNP configuration, with emitter tied to the positive rail and load connected between collector and ground. Its V_EBO = 5 V rating allows direct interface with 3.3 V logic for base control via current-limiting resistor. However, it requires inverted logic drive and careful attention to base current sourcing; the TN6727A_D74Z is not a logic-level or integrated high-side driver IC.

Is TN6727A_D74Z RoHS compliant and halogen-free?

The original Fairchild TN6727A datasheet (Rev. D, 1997) predates RoHS legislation and does not declare compliance status. As a legacy TO-92 discrete, the TN6727A_D74Z supplied by Aetrix Electronics meets current J-STD-609 Category 1 (halogen-free) and RoHS Directive 2011/65/EU requirements per material declarations from ON Semiconductor's post-acquisition product continuity program. Certifications are available upon request for the TN6727A_D74Z.