Diodes Incorporated BCP5316QTA

Overview

BCP5316QTA from Diodes Incorporated is an AEC-Q101-qualified PNP bipolar junction transistor in SOT223 package, rated for -80V V_CEO, -1A continuous collector current, and 2W power dissipation. It delivers low saturation voltage (< -500 mV at -500 mA), supports automotive-grade thermal operation (-55°C to +150°C), and serves as a medium-power switching or amplification device in engine control modules and body electronics.

For engineers reviewing the BCP5316QTA datasheet, BCP5316QTA pinout, BCP5316QTA application, or BCP5316QTA equivalent, key selection criteria include its -80V breakdown rating, -1A DC current capability, SOT223 thermal performance (R_θJA = 62°C/W), AEC-Q101 qualification status, and complementary pairing with BCP5616Q for push-pull designs.

Technical Context

This PNP transistor operates in linear or saturated switching modes with verified h_FE of 25–250 across -5mA to -500mA collector currents and fixed V_CE = -2V bias. Its f_T of 150 MHz enables audio-frequency amplification and fast-switching applications up to ~100 kHz duty-cycle-limited loads.

Thermal design relies on its R_θJL = 19.4°C/W junction-to-leads path and validated derating curve for 50 mm × 50 mm 1 oz copper PCBs. ESD robustness includes 4 kV HBM and 400 V MM ratings per JEDEC JESD22-A114/A115.

Key Specifications

Pinout & Package

SOT223 package with exposed collector tab for thermal conduction; molded green plastic case (UL 94V-0), matte tin-plated leads, and 0.112 g mass. Moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCP53-16, the BCP5316QTA adds automotive qualification and tighter parametric consistency; versus MJD2955G, it trades peak current for compact SOT223 integration and simplified thermal management in space-constrained modules.

Availability

BCP5316QTA is available at Aetrix Electronics and suitable for engine control units, body control modules, audio driver stages, and industrial sensor interfaces requiring stable component supply across automotive production lifecycles.

Supply support for BCP5316QTA 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.

The BCP5316QTA belongs to Diodes' automotive-qualified bipolar transistor product line, engineered specifically for medium-power switching and amplification in AEC-Q101-compliant systems with stringent thermal and longevity requirements.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The BCP5316QTA has an operating junction temperature range of -55°C to +150°C. For continuous DC operation at full 2 W dissipation, ambient temperature must be limited to ≤118°C using the R_θJA = 62°C/W rating, assuming a 50 mm × 50 mm 1 oz copper PCB in still air. Derating curves in the datasheet define safe power limits above 25°C ambient.

Is the SOT223 collector tab electrically isolated from other pins?

No - the metal tab is internally connected to the collector terminal. It must be treated as a live high-current node and electrically insulated from adjacent components or chassis unless intentionally used as a heatsink ground path. The tab is not dielectrically isolated; isolation requires external insulating hardware or thermal pads rated for ≥100 V.

Can BCP5316QTA replace BCP53-16 in existing designs without layout changes?

Yes, mechanically and electrically - both share identical SOT223 pinout, marking, and footprint. However, BCP5316QTA adds AEC-Q101 qualification, tighter parameter distributions, and enhanced ESD robustness. No PCB modification is needed, but qualification documentation and test reports must be updated for automotive production release.

What is the recommended base resistor value for driving a 500 mA load?

With h_FE(min) = 25 at I_C = -500 mA and V_BE(on) ≈ -1.0 V, a base current of -20 mA is minimum. Assuming a 3.3 V MCU GPIO, R_B = (3.3 V − 1.0 V) / 20 mA = 115 Ω. A standard 120 Ω resistor ensures reliable saturation while limiting base drive to safe levels per I_B = -100 mA absolute max rating.