NXP Semiconductors PZU14DB2,115

Overview

PZU14DB2,115 from Nexperia is a dual isolated general-purpose Zener diode in SOT353 (SC-88A) package, designed for precision voltage regulation and overvoltage protection in compact surface-mounted circuits. It features a nominal Zener voltage of 14 V (13.7 V to 14.3 V), ±2 % tolerance (B2 series), 250 mW total power dissipation, and AEC-Q101 qualification for automotive use.

For engineers reviewing the PZU14DB2,115 datasheet, PZU14DB2,115 pinout, PZU14DB2,115 application, or PZU14DB2,115 equivalent, key selection criteria include dual-diode isolation, low differential resistance (80 Ω at I_Z = 5 mA), halogen-free packaging option (/DG variant), and non-repetitive surge capability up to 40 W.

Technical Context

This device integrates two electrically isolated Zener diodes in a single 5-pin SOT353 package - pins 1 & 5 form diode 1 (anode/cathode), pins 3 & 4 form diode 2 (anode/cathode), with pin 2 unconnected. Each diode operates independently with identical 14 V nominal regulation and matched thermal coefficients (SZ = +11 mV/K).

It supports bidirectional transient suppression via reverse-biased operation and forward conduction (V_F ≤ 1.1 V at 100 mA), enabling dual-role use in clamping and reference circuits. Thermal resistance is 500 K/W (junction-to-ambient, free air) and 200 K/W (junction-to-solder point), supporting reliable operation up to 150 °C junction temperature.

Key Specifications

Pinout & Package

SOT353 (SC-88A) is a 5-lead, very small outline plastic surface-mount package measuring 2.2 mm × 1.35 mm × 0.95 mm, optimized for high-density PCB assembly and reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PZU14DB2,115, BZX84-C15 increases board area and reliability risk due to dual-device implementation, while PZU15DB2,115 trades 1 V higher regulation for identical thermal and surge performance - making it suitable only when 14 V is insufficient for headroom requirements.

Availability

PZU14DB2,115 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, consumer audio reference circuits, and power supply overvoltage protection requiring stable component supply and AEC-Q101 compliance.

Supply support for PZU14DB2,115 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

Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on high-volume, high-reliability components for automotive, industrial, and computing markets.

The PZUxDB2 series was developed to deliver AEC-Q101-qualified dual Zener diodes in ultra-compact SOT353 packages for space-constrained automotive ECUs and industrial IoT edge nodes requiring dual-rail voltage stabilization.

FAQ

What is the maximum continuous reverse current for PZU14DB2,115 at 25 °C?

The maximum continuous reverse current (I_Z) is not specified as a standalone limiting value; instead, the device is rated for 250 mW total power dissipation at T_amb ≤ 25 °C. At nominal 14 V Zener voltage, this corresponds to ~17.9 mA average reverse current before thermal derating applies. Operation beyond this requires junction temperature monitoring per the R_th(j-a) = 500 K/W specification.

Can pin 2 be grounded or left floating in PCB layout?

Pin 2 is internally not connected and must remain electrically floating - no PCB trace, thermal pad, or ground connection should be made. Grounding pin 2 may cause unintended parasitic coupling or violate the SOT353 mechanical footprint, risking solder joint reliability during reflow.

How does the +11 mV/K temperature coefficient affect long-term stability?

The +11 mV/K coefficient means V_Z increases by ~154 mV over a 14 K rise (e.g., from 25 °C to 139 °C). This predictable positive drift allows designers to compensate in firmware or pair with negative-coefficient references in precision bias networks - unlike uncharacterized or variable-coefficient alternatives.

Is the /DG halogen-free variant pin-compatible with PZU14DB2,115?

Yes - PZU14DB2/DG,115 uses the identical SOT353 package, pinout, and electrical specifications; only the molding compound is halogen-free. The marking code changes from TL* to UL*, and the 12NC ordering code differs, but PCB footprint and solder profile remain fully interchangeable.