Nexperia USA Inc. NZX24A,133

Overview

NZX24A,133 from Nexperia is a single Zener diode in a hermetically sealed SOD27 (SC-40) glass package, designed for precision voltage regulation and reference functions at 24 V nominal Zener voltage. It delivers 70 Ω typical differential resistance at I_Z = 2 mA, supports ≤500 mW total power dissipation, maintains ≤0.05 µA reverse leakage at V_R = 16.8 V, and operates across −65 °C to +175 °C ambient temperature - deployed in industrial power supply feedback loops and analog sensor biasing circuits.

For engineers reviewing the NZX24A,133 datasheet, NZX24A,133 pinout, NZX24A,133 application, or NZX24A,133 equivalent, this page provides verified Zener voltage tolerance (±5%), thermal resistance (R_th(j-a) = 380 K/W), cathode/anode polarity marking, and direct replacement guidance against industry-standard 24 V Zener references with axial leaded SOD27 packaging.

Technical Context

This device operates as a two-terminal voltage reference using avalanche breakdown in silicon, with a specified Zener voltage of 22.9 V (min) to 24.0 V (max) at I_Z = 2 mA. Its low 70 Ω differential resistance ensures stable regulation under varying load currents, while its 0.05 µA max reverse current at 16.8 V enables high-impedance bias networks without significant error.

The SOD27 package provides hermetic glass sealing for long-term stability and moisture resistance, with axial leads optimized for through-hole PCB mounting. Thermal performance is characterized with R_th(j-a) = 380 K/W on FR4 board (no copper pad), supporting reliable operation up to 175 °C junction temperature.

Key Specifications

Pinout & Package

Package: SOD27 (SC-40), hermetically sealed axial-leaded glass package with cathode band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55-C24 and 1N4749A, NZX24A,133 offers superior long-term stability due to hermetic glass packaging, tighter leakage control for high-Z circuits, and optimal thermal resistance for compact industrial PCB layouts - making it preferred for metrology-grade and safety-critical regulation.

Availability

NZX24A,133 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning, overvoltage protection circuits, and calibration reference designs requiring stable component supply across multi-year production cycles.

Supply support for NZX24A,133 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.

NZX series Zener diodes are engineered for precision voltage reference and regulation in harsh-environment applications, emphasizing long-term parametric stability, hermetic reliability, and wide temperature capability.

FAQ

What is the exact Zener voltage tolerance for NZX24A,133 at 2 mA test current?

The NZX24A,133 has a guaranteed Zener voltage range of 22.9 V (minimum) to 24.0 V (maximum) when measured at I_Z = 2 mA and T_j = 25 °C, corresponding to a ±5% tolerance about the nominal 24 V rating. This is confirmed in Table 9 of the official Nexperia datasheet Rev. 4.

Can NZX24A,133 be used in surface-mount designs?

No - NZX24A,133 uses the axial-leaded SOD27 (SC-40) glass package, which is strictly through-hole mountable. It lacks solder pads or gull-wing leads required for reflow assembly. For SMT equivalents, consider Nexperia's BZX384-B24 or BZX84-C24 in SOT-23, though these differ in thermal and leakage performance.

How does the 380 K/W thermal resistance affect practical power derating?

At ambient temperatures above 25 °C, power must be linearly derated: P_max = 500 mW × (1 − (T_amb − 25)/145). For example, at 75 °C ambient, maximum allowable dissipation drops to 328 mW. This derating ensures junction temperature stays below 175 °C on standard FR4 with 8 mm lead length.

Is NZX24A,133 automotive-qualified?

No - the datasheet explicitly states "Non-automotive qualified products" and confirms no AEC-Q200 qualification or automotive-specific testing. While its −65 °C to +175 °C rating overlaps some automotive under-hood conditions, it lacks the process controls, lot traceability, and stress validation required for automotive use.