Nexperia USA Inc. NZX9V1B,133

Overview

NZX9V1B,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 9.1 V nominal Zener voltage with ±5% tolerance. It delivers 500 mW total power dissipation, low differential resistance (20 Ω at I_Z = 5 mA), and low reverse leakage current (≤0.5 μA at V_R = 6 V), enabling stable clamping in low-power analog supply rails and overvoltage protection circuits.

For engineers reviewing the NZX9V1B,133 datasheet, NZX9V1B,133 pinout, NZX9V1B,133 application, or NZX9V1B,133 equivalent, this device serves as a cost-effective, temperature-stable voltage reference in linear regulators, sensor biasing networks, and ESD-tolerant signal conditioning stages where axial-leaded reliability and low thermal resistance (R_th(j-a) = 380 K/W) are critical.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 9.1 V at 5 mA test current, exhibiting a typical temperature coefficient of −3 mV/K across 25–150 °C. Its low differential resistance ensures minimal voltage variation under load shifts, while its hermetic glass package maintains long-term stability in humid or thermally cycling environments.

The device adheres to IEC 60134 absolute maximum ratings, with junction temperature up to 175 °C, ambient operating range from −55 °C to +175 °C, and forward voltage ≤1.5 V at 200 mA - confirming robustness in both regulation and transient conduction roles.

Key Specifications

Pinout & Package

Package: SOD27 (SC-40), hermetically sealed axial-leaded glass package with cathode band marking; dimensions: 4.25 mm max length × 1.85 mm max diameter; lead spacing 25.4 mm min.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55C9V1 and 1N4739A, NZX9V1B,133 offers superior long-term stability via hermetic sealing and optimal thermal resistance for compact 500 mW designs - making it preferred for space-constrained, high-reliability analog references where leakage and drift must be minimized.

Availability

NZX9V1B,133 is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) analog input stages, and automotive body electronics requiring stable component supply with traceable lot history and extended lifecycle support.

Supply support for NZX9V1B,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 components and energy-efficient solutions.

The NZX series targets general-purpose Zener regulation in cost-sensitive, thermally demanding applications - emphasizing hermetic stability, tight voltage tolerance, and wide temperature operation for industrial and automotive auxiliary systems.

FAQ

What is the maximum continuous reverse current the NZX9V1B,133 can sustain without degradation?

The device is rated for a maximum reverse current of 250 mA per Absolute Maximum Ratings (Table 5), but sustained operation above 5 mA will exceed its 500 mW power limit unless ambient temperature is tightly controlled. For reliable long-term regulation, operation at ≤5 mA is recommended to maintain <100 mV voltage shift and prevent thermal runaway.

How does the cathode band orientation affect PCB layout and soldering?

The black cathode band must align with the designated cathode pad on the PCB - incorrect orientation results in forward conduction instead of Zener breakdown, causing unregulated current flow and potential circuit malfunction. During reflow, axial leads require symmetric thermal mass; mounting on FR4 without copper pour ensures specified R_th(j-a) = 380 K/W.

Can NZX9V1B,133 replace older 1N4739A parts in existing designs?

Yes, with caveats: both share 9.1 V nominal voltage and ±5% tolerance, but NZX9V1B,133 has lower power rating (500 mW vs. 1 W) and different package geometry (SOD27 vs. DO-41). Replacement requires verifying thermal margins and mechanical fit; no electrical redesign is needed if operating current stays ≤5 mA and ambient remains <60 °C.

Is NZX9V1B,133 qualified for automotive applications per AEC-Q200?

No - the datasheet explicitly states "Non-automotive qualified products" and confirms this part is not tested or warranted for automotive use. While its −55 °C to +175 °C operating range overlaps AEC-Q200 Grade 1 requirements, absence of qualification testing (e.g., vibration, humidity, lifetime HTOL) means it cannot be used in safety-critical or production automotive systems without additional customer validation.