NXP Semiconductors PZU7.5B3,115

Overview

PZU7.5B3,115 from Nexperia is a precision Zener voltage regulator diode in the PZUxB series, designed for stable voltage reference and overvoltage protection in compact SMD circuits. It delivers a nominal 7.5 V Zener voltage at 5 mA, with ±2 % tolerance (B3 grade), 60 Ω typical differential resistance, and 4 nA reverse current at 5.5 V - enabling low-power biasing and noise-sensitive analog regulation in automotive and industrial power rails.

For engineers reviewing the PZU7.5B3,115 datasheet, PZU7.5B3,115 pinout, PZU7.5B3,115 application, or PZU7.5B3,115 equivalent, key selection criteria include its AEC-Q101 qualification, SOD323F package thermal performance (R_th(j-sp) = 55 K/W), tight 2 % voltage tolerance, and optimized leakage-current profile for fast switching and noise reduction per AN90031.

Technical Context

The PZU7.5B3,115 operates as a two-terminal shunt regulator with hard breakdown knee and intentional minor leakage rise to improve transient response and reduce noise - a design feature specifically implemented for types PZU11B2–PZU51B. Its junction temperature range spans –65 °C to +150 °C, supporting operation in under-hood automotive environments.

It exhibits a positive temperature coefficient of +4.0 mV/K at I_Z = 5 mA and maintains stable regulation down to 0.5 mA test current, with dynamic impedance minimized across low-current operation - critical for battery-powered sensor biasing and standby-mode voltage references.

Key Specifications

Pinout & Package

SOD323F (SC-90) plastic surface-mounted package: 2-pin, ultra-small outline (2.3 mm × 1.35 mm × 0.95 mm), flat lead, cathode marked by bar.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B7V5,115 and MMSZ5235B-TP, the PZU7.5B3,115 delivers superior low-leakage performance, lower dynamic impedance, and automotive-grade reliability - making it the preferred choice where signal integrity, long-term stability, and AEC compliance are mandatory.

Availability

PZU7.5B3,115 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor conditioning, and medical instrumentation requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for PZU7.5B3,115 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 semiconductor expert focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.

The PZUxB series was developed to provide AEC-Q101-qualified Zener regulators with optimized noise, leakage, and thermal behavior for next-generation automotive and industrial power systems.

FAQ

What is the Zener voltage tolerance of PZU7.5B3,115?

The PZU7.5B3,115 has a Zener voltage tolerance of approximately ±2 %, corresponding to a nominal 7.5 V working voltage range of 7.52 V to 7.84 V at I_Z = 5 mA. This B3-grade tolerance is tighter than standard B (±5 %) or B2 (±2 % with different test conditions) variants, and is explicitly confirmed in Table 8 of the Nexperia PZUxB series datasheet Rev. 6.

Is PZU7.5B3,115 qualified for automotive applications?

Yes, the PZU7.5B3,115 is AEC-Q101 qualified, as stated in Section 11 ("Test information") of the official Nexperia datasheet. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD, confirming suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and electrical stress is critical. The PZU7.5B3,115 meets these requirements as part of the broader PZUxB family.

What is the maximum reverse current specification for PZU7.5B3,115 at 5.5 V?

The maximum reverse current (I_R) for PZU7.5B3,115 is 4 nA at V_R = 5.5 V, as specified in Table 8 of the Nexperia datasheet. This ultra-low leakage supports energy-efficient designs such as battery-backed real-time clocks and always-on sensor interfaces. The value is measured at T_j = 25 °C and reflects the intentional low-leakage optimization applied to PZU7.5B3,115 within the PZUxB series.

What package type does PZU7.5B3,115 use, and what are its key mechanical dimensions?

The PZU7.5B3,115 uses the SOD323F (SC-90) package: a 2-pin, surface-mount plastic package measuring 2.3 mm × 1.35 mm × 0.95 mm with flat leads. Per Figure 9 in the datasheet, it features a cathode-marking bar and is optimized for reflow soldering only. The package supports thermal resistance of 55 K/W to the solder point, enabling high-power-density placement on FR4 PCBs with standard footprints.

How does the temperature coefficient of PZU7.5B3,115 affect its performance in wide-temperature applications?

The PZU7.5B3,115 has a temperature coefficient (S_Z) of +4.0 mV/K at I_Z = 5 mA, as listed in Table 8. This positive, linear drift means its Zener voltage increases predictably with junction temperature - enabling straightforward compensation in reference circuits. Over –40 °C to +125 °C, the total V_Z shift remains within ±0.3 V, supporting stable operation in automotive and industrial environments without external correction.