Nexperia USA Inc. PZU24DB2,115

Overview

PZU24DB2,115 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 24 V ±2 %, non-repetitive peak reverse power dissipation of 40 W, total power dissipation ≤250 mW, and AEC-Q101 qualification for automotive use.

For engineers reviewing the PZU24DB2,115 datasheet, PZU24DB2,115 pinout, PZU24DB2,115 application, or PZU24DB2,115 equivalent, this device supports dual-channel voltage clamping in space-constrained power rails, ESD-robust I/O protection, and stable reference generation where tight tolerance and low thermal drift are required.

Technical Context

The PZU24DB2,115 integrates two electrically isolated Zener diodes in a single 5-pin SOT353 package, enabling independent regulation or bidirectional clamping without shared cathode/anode paths. Each diode operates with a typical Zener voltage of 23.72 V to 24.78 V at I_Z = 5 mA and exhibits a temperature coefficient of +19 mV/K - positive and stable across its operating range.

Its differential resistance is ≤120 Ω at 5 mA, reverse current ≤0.05 µA at V_R = 19.2 V, and junction-to-ambient thermal resistance is 500 K/W on standard FR4 PCB. The device sustains non-repetitive surge currents up to 19 A (calculated from P_ZSM = 40 W and V_Z ≈ 24 V) under 100 µs square-wave conditions.

Key Specifications

Pinout & Package

SOT353 (SC-88A) is a 5-lead, very small surface-mounted plastic package measuring 2.2 mm × 1.35 mm × 0.95 mm, optimized for high-density PCB layouts and reflow soldering. Its halogen-free variant (DG suffix) meets RoHS and JEDEC MSL3 requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C24,115, PZU24DB2,115 delivers dual-channel isolation in half the footprint and tighter tolerance; versus PZU24B2,115, it improves voltage accuracy by ±3 % - critical for closed-loop regulation and sensor excitation stability.

Availability

PZU24DB2,115 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor reference design, and consumer port protection requiring stable component supply and AEC-Q101 compliance.

Supply support for PZU24DB2,115 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 engineered specifically for space-constrained voltage regulation and transient protection in automotive ECUs and industrial controllers - emphasizing AEC-Q101 robustness, tight Zener tolerance, and dual-diode integration.

FAQ

What is the maximum continuous Zener current for PZU24DB2,115?

The device supports a maximum continuous forward current of 200 mA per diode, but practical Zener bias current is limited by total power dissipation (250 mW). At 24 V, this restricts sustained Zener current to ≤10.4 mA - verified in Table 5 limiting values and thermal derating curves.

Is Pin 2 internally connected or should it be left floating?

Pin 2 is explicitly designated "not connected" in Table 2 pinning information and must remain unconnected - no internal bond wire links to this terminal. Routing or grounding Pin 2 may cause mechanical stress or unintended parasitic coupling in high-frequency layouts.

How does the +19 mV/K temperature coefficient affect regulation accuracy over temperature?

At 24 V nominal, +19 mV/K yields ~1.9 V drift over 100 °C span (e.g., −40 °C to +60 °C), corresponding to ±3.9 % change. This is fully characterized in Figure 6 and compensated via system-level calibration or matched resistor networks in precision references.

Can PZU24DB2,115 replace PZU24B2,115 in an existing design?

Yes - identical pinout, package, and electrical ratings except for tighter ±2 % tolerance (vs ±5 %). No layout or firmware changes are needed; improved voltage accuracy may enhance regulation stability in feedback loops without additional components.