Diodes Incorporated BZX84C4V7Q-13-F

Overview

BZX84C4V7Q-13-F from Diodes Incorporated is an automotive-grade 4.7 V, 350 mW surface-mount Zener diode in SOT23 package, designed for precision voltage regulation and overvoltage protection in low-power analog circuits, power supply feedback paths, and reference voltage generation. It delivers ±5% nominal Zener voltage tolerance at 5 mA test current, 80 Ω dynamic impedance at I_ZT, and operates across –65 °C to +150 °C.

For engineers reviewing the BZX84C4V7Q-13-F datasheet, BZX84C4V7Q-13-F pinout, BZX84C4V7Q-13-F application, or BZX84C4V7Q-13-F equivalent, key selection criteria include Zener voltage accuracy at low test current (5 mA), thermal resistance (357 °C/W), AEC-Q101 qualification, reverse leakage (≤3.0 µA at 2.0 V), and SOT23 terminal configuration for high-density PCB layouts.

Technical Context

This Zener diode uses planar die construction for stable breakdown characteristics and tight voltage distribution. Its 4.7 V nominal Zener voltage is specified at 5 mA with a temperature coefficient of –3.5 mV/°C, indicating negative drift with rising junction temperature - critical for biasing stability in temperature-sensitive references.

The device supports two distinct power dissipation ratings: 350 mW under ambient-temperature terminal conditions (Note 7), and 300 mW when mounted on FR-4 with recommended pad layout (Note 6). Its 80 Ω Zener impedance at I_ZT and 500 Ω at knee current (I_ZK = 1.0 mA) define regulation fidelity across operating current range.

Key Specifications

Pinout & Package

Package: SOT23 - 3-terminal surface-mount plastic package with matte tin-plated Alloy 42 leadframe, UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ4704T1G and BZX84-C4V7E6327HTSA1, BZX84C4V7Q-13-F uniquely combines AEC-Q101 qualification, SOT23 miniaturization, and –3.5 mV/°C tempco - making it the sole choice for automotive voltage reference designs requiring both reliability and thermal-aware regulation.

Availability

BZX84C4V7Q-13-F is available at Aetrix Electronics and suitable for automotive cabin control modules, industrial sensor signal conditioning circuits, and smart energy meter power supplies requiring stable component supply, long-term lifecycle assurance, and traceable AEC-Q101 compliance.

Supply support for BZX84C4V7Q-13-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, specializing in high-reliability components for automotive, industrial, and consumer markets with emphasis on power management and signal integrity.

The BZX84 series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for precision voltage reference and transient suppression in safety-critical vehicle subsystems and harsh-environment industrial controls.

FAQ

What is the Zener test current (I_ZT) for BZX84C4V7Q-13-F?

The Zener test current is 5.0 mA, as specified in the Electrical Characteristics table. At this current, the device achieves its nominal 4.7 V Zener voltage with ±5% tolerance. This value is standardized across the BZX84C series and used for all parametric measurements including Z_ZT and temperature coefficient.

Is the third pin (SOT23 Pin 3) electrically connected?

No, Pin 3 is a no-connect terminal - it serves only as a mechanical support and internal die attach flag. It is not bonded to the silicon die and must remain unconnected in circuit design to avoid unintended thermal or electrical coupling.

How does the –3.5 mV/°C temperature coefficient affect circuit performance?

The negative temperature coefficient means the Zener voltage decreases by 3.5 mV per degree Celsius rise in junction temperature. In precision references, this can offset positive drift in op-amps or ADCs, improving overall system stability - especially when placed near heat-generating components like regulators or drivers.

What packaging quantity does the "-13-F" suffix indicate?

The "-13-F" suffix denotes 10,000 units per tape-and-reel pack, using standard carrier tape (not automotive-grade tape). This differs from "-7-F", which indicates 3,000 units per reel. Both use EIA-481-compliant embossed plastic tape and 8 mm width.