Nexperia USA Inc. PZU3.6B2A,115

Overview

PZU3.6B2A,115 from Nexperia is a precision Zener voltage regulator diode in SOD323 (SC-76) package, designed for low-power voltage reference and overvoltage protection in space-constrained PCBs. It delivers 3.6 V nominal Zener voltage with ±2 % tolerance, 90 Ω maximum differential resistance at 5 mA, and 5 µA reverse current at 0.5 mA test condition - enabling stable regulation in power supply feedback loops and sensor biasing circuits.

For engineers reviewing the PZU3.6B2A,115 datasheet, PZU3.6B2A,115 pinout, PZU3.6B2A,115 application, or PZU3.6B2A,115 equivalent, key selection criteria include tight voltage tolerance, low dynamic impedance at low currents, hard breakdown knee, and thermal resistance of 255 K/W junction-to-solder-point - critical for compact DC-DC converter references and ESD-protected analog front-ends.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its cathode-anode terminals. Its design emphasizes low leakage (5 µA at I_Z = 0.5 mA), sharp knee characteristics, and predictable temperature coefficient (−2.4 mV/K) - optimized for accuracy in low-current regulation scenarios.

The device supports non-repetitive surge handling up to 40 W (100 µs square wave) and continuous dissipation of 320 mW on standard FR4 PCB. Its SOD323 footprint enables high-density placement while maintaining thermal performance via direct cathode pad conduction (R_th(j-sp) = 55 K/W).

Key Specifications

Pinout & Package

SOD323 (SC-76) surface-mount plastic package with 2 leads, 1.3 mm pitch, and cathode marked by a bar on the top surface. Body dimensions: 1.7 mm × 1.25 mm × 0.95 mm. Mounting requires tin-plated single-sided FR4 PCB with standard footprint per Figure 10.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B3V6,115 and MMSZ4685T1G, PZU3.6B2A,115 offers tighter tolerance, lower dynamic impedance, and half the leakage - making it optimal for precision reference and micro-power applications where parameter drift directly impacts system accuracy or battery life.

Availability

PZU3.6B2A,115 is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage protection clamps, and sensor biasing circuits requiring stable component supply across automotive infotainment, industrial IoT gateways, and portable medical instrumentation.

Supply support for PZU3.6B2A,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, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for surface-mounted voltage reference and protection functions in miniaturized, thermally constrained PCB designs.

FAQ

What is the maximum continuous reverse current for PZU3.6B2A,115 at 25 °C ambient?

The device does not specify a maximum continuous reverse current; instead, it defines total power dissipation limit of 320 mW at T_amb ≤ 25 °C on standard FR4 PCB. At 3.6 V Zener voltage, this corresponds to ~89 mA average reverse current - but actual usable current depends on thermal design and derating per R_th(j-a) = 255 K/W.

Does PZU3.6B2A,115 support reflow soldering per JEDEC J-STD-020?

Yes - the SOD323 package is qualified for standard lead-free reflow profiles. Nexperia specifies a maximum peak temperature of 260 °C for 30 seconds, with ramp-up rate ≤ 3 °C/s and ramp-down rate ≤ 6 °C/s, matching JEDEC J-STD-020D. Footprint dimensions align with Figure 10 in the datasheet.

How does the −2.4 mV/K temperature coefficient affect regulation accuracy over −40 °C to +125 °C?

Over that range, the coefficient causes approximately ±0.4 V drift (−2.4 mV/K × 165 K span), resulting in ~±11 % deviation from nominal 3.6 V. For high-accuracy applications, this must be compensated in system-level calibration or mitigated using temperature-stable circuit topologies.

Can PZU3.6B2A,115 replace PZU3.6B1A,115 in an existing design?

Yes - both share identical electrical specifications except for tolerance: B1A is ±1 %, B2A is ±2 %. The B2A variant has wider voltage spread but identical dynamic impedance, leakage, and thermal characteristics. No layout or thermal changes are needed, though system-level accuracy verification is recommended.