Diodes Incorporated QZX363C15-7-F

Overview

QZX363C15-7-F from Diodes Incorporated is a quad surface-mount Zener diode array with nominal 15 V Zener voltage (13.8–15.6 V range at 5 mA), 200 mW power dissipation, 30 Ω dynamic impedance at test current, and SOT363 package. It provides precision voltage regulation and transient suppression in compact space-constrained PCBs for industrial sensor interfaces and power rail clamping.

For engineers reviewing the QZX363C15-7-F datasheet, QZX363C15-7-F pinout, QZX363C15-7-F application, or QZX363C15-7-F equivalent, key selection criteria include Zener voltage tolerance (±4%), thermal resistance (625 °C/W), reverse leakage (<0.1 µA at 12 V), temperature coefficient (+9.2 to +13.0 mV/°C), and quad-channel integration in a single 2.15 mm × 2.10 mm footprint.

Technical Context

This device integrates four independent Zener diodes in one monolithic SOT363 package, each rated for 15 V nominal breakdown with tight ±4% tolerance at I_ZT = 5 mA. Its low 30 Ω Zener impedance ensures stable regulation under load variation, while the 625 °C/W junction-to-ambient thermal resistance defines derating behavior above 25 °C ambient.

The diodes exhibit a positive temperature coefficient (+9.2 to +13.0 mV/°C), enabling predictable voltage drift over temperature. Total capacitance is not specified per channel but falls within typical Zener ranges (<2 pF at 1 V reverse bias) suitable for high-frequency transient suppression without signal distortion.

Key Specifications

Pinout & Package

SOT363 is a 6-pin, dual-row surface-mount plastic package with exposed pad option (not present in this variant). Pin 1 is marked by notch or bevel; device orientation follows standard top-view schematic with cathode/anode assignments per diode element.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-C15-Q, QZX363C15-7-F saves 75% board area via quad integration and offers tighter voltage control; compared with MMBZ5245BS-7-F, it trades 100 mW total power for ±4% tolerance and lower Zener impedance-critical for precision analog clamping.

Availability

QZX363C15-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, medical patient monitor analog protection, and telecom line interface transient suppression requiring stable component supply and full RoHS 3 compliance.

Supply support for QZX363C15-7-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 QZX363 series belongs to Diodes' precision Zener diode portfolio, designed specifically for space-constrained, high-reliability voltage regulation and transient suppression in industrial, automotive, and medical electronics.

FAQ

What is the maximum reverse voltage that QZX363C15-7-F can withstand before breakdown?

The device exhibits a nominal Zener voltage of 15 V at 5 mA test current, with a guaranteed breakdown range of 13.8 V to 15.6 V. At voltages below 12 V, reverse leakage remains ≤0.1 µA; sustained operation above 15.6 V will cause conduction and power dissipation limited by the 200 mW rating and thermal environment.

Can QZX363C15-7-F be used in place of a single 15 V Zener diode?

Yes, any one cathode (pins 1, 2, 5, or 6) paired with the shared anode (pin 3) functions as an independent 15 V Zener. The unused cathodes must be left unconnected or tied to appropriate potential per circuit requirements; NC pin (pin 4) must remain unconnected.

Does QZX363C15-7-F support reflow soldering per J-STD-020?

Yes, the device is qualified for lead-free reflow per J-STD-020, with Moisture Sensitivity Level 1 rating. It withstands peak temperatures up to 260 °C for ≤60 seconds and requires no pre-bake prior to assembly when stored per MSL-1 conditions.

How does the temperature coefficient affect regulation accuracy over –40°C to +125°C?

With a TC of +9.2 to +13.0 mV/°C, the Zener voltage increases by approximately +1.1 V to +1.6 V across the full temperature range. For applications requiring <1% regulation stability, external compensation or tighter initial tolerance selection (e.g., binning) is recommended.