Diodes Incorporated BCP6825TA

Overview

BCP6825TA from ON Semiconductor is an NPN silicon planar medium-power transistor designed for audio-frequency driver and output stage applications, featuring V_CEO = 20 V, I_C = 1 A continuous, P_tot = 2 W at T_amb = 25°C, V_CE(sat) = 0.5 V at I_C = 1 A / I_B = 100 mA, and h_FE up to 400 - used in compact linear amplifier stages and relay drivers.

For engineers reviewing the BCP6825TA datasheet, BCP6825TA pinout, BCP6825TA application, or BCP6825TA equivalent, key selection criteria include saturation voltage under high-current drive, thermal derating behavior in SOT-223, DC current gain consistency across I_C = 5 mA to 500 mA, and complementary pairing with BCP69 for push-pull configurations.

Technical Context

This transistor operates as a medium-power linear switching and amplification device in Class-A/AB audio output stages and low-voltage DC load control circuits. Its planar construction ensures stable h_FE across temperature, and the SOT-223 package provides enhanced thermal dissipation over SOT-23 while maintaining surface-mount compatibility.

The device exhibits pulsed-rated I_CM = 2 A with ≤2% duty cycle (300 µs pulse width), enabling short-duration surge handling in motor start-up or solenoid drive. Breakdown ratings - V_CBO = 25 V, V_CEO = 20 V, V_EBO = 5 V - define safe operating area boundaries for bias design in single-supply 12–15 V systems.

Key Specifications

Pinout & Package

SOT-223 package with exposed collector tab (pin 3) for thermal conduction and mechanical anchoring; standard 4-pin outline (3 active + 1 thermal pad), lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZTX653 and MJD112, BCP6825TA offers optimal balance of low V_CE(sat), SOT-223 thermal performance, and cost-effective manufacturability for 12 V, ≤1 A linear and switching applications - especially where board area and thermal management are constrained.

Availability

BCP6825TA is available at Aetrix Electronics and suitable for audio output stages, relay drivers, DC motor control, and LED current regulation requiring stable component supply and consistent parametric performance across production lots.

Supply support for BCP6825TA 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, sensor, and discrete devices for automotive, industrial, and consumer applications.

BCP6825TA belongs to ON Semiconductor's general-purpose bipolar transistor product line, engineered for cost-sensitive, medium-power linear and switching applications in space-constrained PCB layouts.

FAQ

Is BCP6825TA pin-compatible with BCP68 or BCP68-25?

Yes - BCP6825TA is the tape-and-reel packaging variant of the BCP68-25 device; identical die, SOT-223 pinout, and electrical specifications. The "TA" suffix denotes AEC-Q200–qualified tape-and-reel packaging per EIA-481 standard, not a functional revision.

What is the maximum allowable junction temperature during pulsed operation?

The absolute maximum junction temperature remains 150°C regardless of pulse condition. Under pulsed operation (300 µs, ≤2% duty cycle), thermal time constants allow brief I_C peaks up to 2 A without exceeding T_j limits - provided average power stays within P_tot derating curves.

Can BCP6825TA replace BC817 in SOT-23 footprint designs?

No - BCP6825TA uses SOT-223 (larger, thermally enhanced) while BC817 uses SOT-23. Pin assignments differ: BC817 is E-C-B; BCP6825TA is E-B-C-tab. Mechanical and thermal incompatibility prevents drop-in replacement without PCB redesign.

Does BCP6825TA require a base resistor when driven by 3.3 V MCU GPIO?

Yes - a series base resistor is mandatory. With V_BE(on) ≈ 0.7 V and typical I_B = 100 mA needed for I_C = 1 A saturation, a 22 Ω resistor limits GPIO current to ~114 mA, staying within most MCU pin limits while ensuring reliable turn-on.