Diodes Incorporated BC807-40Q-7-F

Overview

BC807-40Q-7-F from Diodes Incorporated is a 45V PNP small-signal transistor in SOT23 package, featuring h_FE = 250–600 at I_C = −100 mA, V_CE(sat) = −0.7 V at I_C = −500 mA/I_B = −50 mA, and f_T = 100 MHz. It serves as a switching and audio-frequency amplifier device in automotive-compliant power management circuits.

For engineers reviewing the BC807-40Q-7-F datasheet, BC807-40Q-7-F pinout, BC807-40Q-7-F application, or BC807-40Q-7-F equivalent, key selection criteria include guaranteed h_FE range, low saturation voltage under high-current drive, thermal resistance (R_θJA = 357 °C/W on 15 mm × 15 mm PCB), and automotive-grade qualification per separate datasheet.

Technical Context

This PNP bipolar junction transistor uses epitaxial planar die construction for stable gain and low leakage. Its complementary NPN counterpart is BC817-40, enabling matched pair design in push-pull amplifiers and H-bridge drivers.

Rated for −45 V V_CEO, −50 V V_CBO, and −5 V V_EBO, it supports operation across −55 °C to +150 °C with ESD robustness (HBM = 4 kV, CDM = 1 kV). Thermal derating begins above 25 °C ambient, with maximum power dissipation dropping linearly to zero at 150 °C.

Key Specifications

Pinout & Package

Package: SOT23 - Surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound, weight ≈ 0.008 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP small-signal transistor applications.

Compared with BC807-40-7-F and MMBT4403, BC807-40Q-7-F delivers certified automotive reliability, tighter h_FE distribution, and lower saturation voltage-making it optimal for mission-critical 12 V/24 V load switching where long-term parametric drift must be minimized.

Availability

BC807-40Q-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial relay interfaces, consumer audio amplifiers, and power supply enable circuits requiring stable component supply and AEC-Q101 compliance.

Supply support for BC807-40Q-7-F 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The BC807 series belongs to Diodes' general-purpose bipolar transistor product line, engineered for cost-effective, high-reliability switching and amplification in automotive, industrial, and consumer applications where robustness and consistent gain performance are essential.

FAQ

What is the difference between BC807-40Q-7-F and BC807-40-7-F?

The "Q" suffix denotes AEC-Q101 qualification, meaning BC807-40Q-7-F undergoes additional stress testing (including temperature cycling, humidity bias, and high-temperature operating life) to meet automotive reliability standards. Electrically identical, it carries full traceability, extended temperature validation (−55 °C to +150 °C), and automotive-specific documentation-not present in the standard BC807-40-7-F.

Can BC807-40Q-7-F replace BC807-25Q-7-F in a circuit?

Yes, provided the design accommodates higher DC current gain (h_FE = 250–600 vs. 160–400). The BC807-40Q offers improved gain consistency at low currents and better saturation behavior at high I_C, but may increase base drive sensitivity. Verify stability in linear applications and confirm no unintended oscillation due to higher f_T-related phase margin reduction.

Is the SOT23 package of BC807-40Q-7-F compatible with standard reflow profiles?

Yes-its SOT23 package meets IPC/JEDEC J-STD-020 moisture sensitivity level 1, allowing floor life unlimited at ≤30 °C/60% RH. Standard lead-free reflow profiles (peak 260 °C, 20–40 sec above 217 °C) are fully supported, and matte tin plating ensures reliable solder wetting without post-reflow cleaning.

Does BC807-40Q-7-F require external protection against inductive kickback?

Yes-while its −45 V V_CEO rating handles moderate flyback energy, sustained inductive switching (e.g., relay coils) requires an external reverse-biased diode across the load. Without clamping, voltage spikes exceeding V_CEO can cause avalanche degradation or hard failure, especially under repeated transient conditions.