Nexperia USA Inc. NZX14B,133

Overview

NZX14B,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 13.5 V nominal Zener voltage (V_Z = 13.5 V, min 13.2 V, max 14.0 V), with differential resistance ≤35 Ω at I_Z = 5 mA and reverse current ≤0.05 µA at V_R = 9.8 V - used in low-power analog reference circuits and overvoltage protection stages of industrial sensor interfaces.

For engineers reviewing the NZX14B,133 datasheet, NZX14B,133 pinout, NZX14B,133 application, or NZX14B,133 equivalent, this part supports stable 13.5 V regulation under 5 mA test current, offers low thermal drift (±2 mV/K typical), and meets IEC 60134 absolute maximum ratings including 500 mW total power dissipation and 175 °C junction temperature.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled V_Z tolerance (±3.7% at 13.5 V), specified at I_Z = 5 mA per IEC 60134 limiting values. Its low differential resistance (≤35 Ω) ensures minimal output voltage variation under load changes, while leakage current remains below 0.05 µA at 9.8 V reverse bias.

The device uses axial-leaded SOD27 packaging with hermetic glass sealing, enabling reliable operation across −65 °C to +175 °C storage and −55 °C to +175 °C ambient ranges. Thermal resistance from junction to ambient is 380 K/W on FR4 PCB without metallization pad, supporting passive thermal management in space-constrained designs.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55-C13 and MMBZ5242B, NZX14B,133 delivers tighter V_Z tolerance, hermetic reliability, and higher thermal robustness - making it preferred for mission-critical analog references and industrial clamping where parameter drift must be minimized over time and temperature.

Availability

NZX14B,133 is available at Aetrix Electronics and suitable for industrial sensor references, overvoltage clamping, power supply feedback loops, and calibration voltage sources requiring stable component supply with guaranteed long-term parametric consistency.

Supply support for NZX14B,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 delivering high-performance logic, discrete, and MOSFET solutions with emphasis on reliability, efficiency, and miniaturization for industrial, automotive, and consumer markets.

The NZX series targets general-purpose Zener regulation with hermetic stability and tight V_Z control - engineered specifically for analog reference integrity and protection circuit robustness in demanding environments.

FAQ

What is the exact Zener voltage range for NZX14B,133 at I_Z = 5 mA?

The confirmed Zener voltage range is 13.2 V (minimum) to 14.0 V (maximum) at 5 mA test current, corresponding to a nominal 13.5 V with ±3.7% tolerance per Nexperia's Product data sheet Rev. 4 (2011). This is measured under T_j = 25 °C and defined in Table 8 for NZX14B.

Can NZX14B,133 be used in surface-mount designs?

No - NZX14B,133 uses the axial-leaded SOD27 (SC-40) hermetic glass package and requires through-hole mounting. It is not compatible with reflow soldering or pick-and-place assembly. For SMT alternatives, consider MMBZ52xx series, though they lack hermetic sealing and have different thermal characteristics.

What is the maximum allowable reverse voltage before breakdown?

The rated reverse voltage (V_R) is 9.8 V - the maximum non-breakdown voltage at which reverse leakage remains ≤0.05 µA. Operation above this voltage initiates Zener conduction; sustained reverse bias beyond V_Z range without current limiting risks thermal runaway due to P_tot limits.

How does thermal resistance affect real-world performance on a standard PCB?

With R_th(j-a) = 380 K/W on FR4 (no copper pour), dissipating 300 mW raises junction temperature by ~114 °C above ambient. At 25 °C ambient, T_j reaches ~139 °C - within the 175 °C limit but necessitating derating above 70 °C ambient to maintain reliability and V_Z stability.