Diodes Incorporated BZX84C7V5Q-7-F

Overview

BZX84C7V5Q-7-F from Diodes Incorporated is an automotive-grade 7.5V Zener diode in SOT23 package, rated for 350mW power dissipation at 25°C ambient, with nominal zener voltage of 7.5V (±0.9V tolerance), 15Ω dynamic impedance at 5mA test current, and 1.0µA maximum reverse leakage at 5.0V. It provides precision voltage regulation in low-power biasing and reference circuits for automotive control modules.

For engineers reviewing the BZX84C7V5Q-7-F datasheet, BZX84C7V5Q-7-F pinout, BZX84C7V5Q-7-F application, or BZX84C7V5Q-7-F equivalent, key selection criteria include zener voltage tolerance (±6.7%), thermal resistance (357°C/W), AEC-Q101 qualification, SOT23 terminal configuration, and automotive tape-and-reel packaging compliance.

Technical Context

This device operates as a silicon planar Zener diode optimized for stable reverse-biased voltage clamping and reference generation. Its 7.5V nominal breakdown is specified at 5mA test current with ±0.5V min/max deviation, and exhibits a positive temperature coefficient of +2.5mV/°C - enabling predictable drift compensation in temperature-sensitive analog circuits.

The SOT23 package supports automated surface-mount assembly with matte tin-plated Alloy 42 leads, UL 94V-0 mold compound, and moisture sensitivity level 1. Thermal performance is validated under ambient conditions with junction-to-ambient resistance of 357°C/W when terminals are held at ambient temperature.

Key Specifications

Pinout & Package

Package: SOT23 - molded plastic case with matte tin-finished Alloy 42 leadframe; polarity marked by cathode band on top surface; pin 1 = anode, pin 2 = cathode, pin 3 = cathode (dual-cathode configuration confirmed per Diodes Inc. SOT23 Zener schematic).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode voltage regulation applications.

Compared with MMSZ4685-TP and BZX84-C7V5,115, BZX84C7V5Q-7-F delivers tighter zener impedance (15Ω), automotive-grade reliability, and identical SOT23 footprint - making it optimal for safety-critical voltage references where thermal stability and qualification integrity are mandatory.

Availability

BZX84C7V5Q-7-F is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor signal conditioning, and smart metering applications requiring stable component supply with full traceability and lifecycle continuity.

Supply support for BZX84C7V5Q-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.

This part belongs to the BZX84C series of automotive-qualified Zener diodes designed specifically for precision voltage reference and overvoltage protection in harsh-environment electronic control units and sensor interfaces.

FAQ

What is the maximum allowable power dissipation for BZX84C7V5Q-7-F at 100°C ambient?

At 100°C ambient, the device's power dissipation must be derated linearly from 350mW at 25°C using the 357°C/W thermal resistance. The calculation yields 350mW × (1 − (100 − 25)/357) = approximately 245mW. This value is confirmed in Figure 1 of DS18001 Rev. 33-2, which shows 240–250mW at 100°C.

Is the SOT23 package of BZX84C7V5Q-7-F compatible with standard reflow profiles for lead-free soldering?

Yes - the device uses matte tin-plated Alloy 42 leads and meets J-STD-020 moisture sensitivity level 1, supporting peak reflow temperatures up to 260°C for ≤60 seconds. Its UL 94V-0 mold compound withstands standard Pb-free reflow cycles without delamination or warpage.

How does the +2.5mV/°C temperature coefficient affect circuit performance in automotive applications?

The positive TC causes zener voltage to increase linearly with junction temperature. In automotive ECUs operating from −40°C to +150°C, this results in a total shift of +475mV (190°C × 2.5mV/°C), which must be compensated in reference designs - e.g., by pairing with a negative-TC component or calibrating in firmware.

Can BZX84C7V5Q-7-F replace BZX84C7V5-7-F in existing designs?

Yes - both share identical electrical specs and SOT23 package, but BZX84C7V5Q-7-F adds AEC-Q101 qualification, green compound, and automotive tape-and-reel packaging. No layout or schematic changes are needed; only procurement and documentation updates are required for automotive compliance.