Diodes Incorporated BC869TA

Overview

BC869TA from Nexperia is a PNP silicon planar medium-power transistor in SOT89 package, rated for V_CEO = −20 V, I_C = −1 A, P_tot = 1 W, and optimized for Class B audio output stages up to 3 W. It delivers high h_FE (min 50 at −5 mA, up to 375 at −500 mA) and low V_CE(sat) = −0.5 V at −1 A/−100 mA drive.

For engineers reviewing the BC869TA datasheet, BC869TA pinout, BC869TA application, or BC869TA equivalent, key selection criteria include its complementary pairing with BC868 (NPN), SOT89 thermal performance, −20 V V_CEO rating for mid-rail audio biasing, and verified h_FE consistency across −5 mA to −1 A operating range.

Technical Context

This PNP transistor operates in linear and switching modes with guaranteed V_(BR)CEO = −20 V at I_C = −10 mA and V_CE(sat) ≤ −0.5 V under −1 A collector current. Its f_T = 60 MHz at −10 mA/−5 V supports audio-frequency amplification with minimal phase shift.

The device features low leakage: ICBO ≤ −10 µA at −25 V and −65 °C to +150 °C junction temperature range. Complementary BC868 NPN enables push-pull stage design with matched thermal and gain characteristics in SOT89 footprint.

Key Specifications

Pinout & Package

SOT89 package: 3-pin surface-mount plastic case with exposed emitter pad for thermal enhancement; standard pin assignment confirmed as Collector (pin 1), Base (pin 2), Emitter (pin 3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power transistor applications.

Compared with BC869TA, ZTX788B offers higher voltage headroom and tighter h_FE spread but similar thermal behavior in SOT89, while MMBT4403 sacrifices current and thermal capability for board space savings in non-power roles.

Availability

BC869TA is available at Aetrix Electronics and suitable for audio power amplifiers, DC-DC converter switches, thermal sensor bias circuits, and LED current regulators requiring stable component supply and SOT89 thermal performance.

Supply support for BC869TA 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

Nexperia is a global semiconductor expert focused on essential semiconductors, delivering high-performance, reliable discrete and logic devices for high-volume applications.

BC869TA belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-sensitive, thermally demanding medium-power analog and switching functions in consumer and industrial equipment.

FAQ

What is the maximum continuous collector current for BC869TA at 70°C ambient?

At T_amb = 70°C, BC869TA's maximum continuous collector current is −0.67 A. This is derived from its 1 W P_tot rating and thermal derating curve: P_tot decreases by 8.3 mW/°C above 25°C, reducing allowable I_C proportionally under fixed V_CE(sat).

Is BC869TA pin-compatible with BC868 in SOT89 package?

No - BC869TA (PNP) and BC868 (NPN) share the same SOT89 mechanical footprint and pinout order (C-B-E), but their complementary polarity means direct substitution without circuit rework is not possible. They are designed for coordinated use in push-pull stages, not interchangeability.

Does BC869TA support pulsed operation beyond its DC ratings?

Yes - BC869TA is characterized for pulsed conditions: I_CM = −2 A peak with pulse width ≤300 µs and duty cycle ≤2%. This enables short-duration surge handling in protection circuits or transient load switching without thermal runaway.

What is the typical output capacitance (C_obo) and its impact on high-frequency response?

BC869TA's C_obo is 45 pF at V_CB = −10 V and f = 1 MHz. This capacitance forms part of the transistor's small-signal output impedance, limiting bandwidth in RF amplifier configurations; however, it remains negligible in audio applications (<20 kHz) where f_T = 60 MHz dominates performance.