Nexperia USA Inc. NZX13B,133

Overview

NZX13B,133 from Nexperia is a single Zener diode in a hermetically sealed SOD27 (SC-40) glass package, designed for precision voltage regulation at 13 V nominal working voltage with ±5% tolerance, 35 Ω typical differential resistance at I_Z = 5 mA, and ≤8 µA reverse current at V_R = 10.5 V - used in low-power reference and overvoltage protection circuits in industrial power supplies and sensor signal conditioning.

For engineers reviewing the NZX13B,133 datasheet, NZX13B,133 pinout, NZX13B,133 application, or NZX13B,133 equivalent, this device is selected for stable 13 V clamping in space-constrained analog front-ends where low leakage (<8 µA), low thermal resistance (R_th(j-a) = 380 K/W), and axial-leaded hermetic reliability are critical.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its 13 V nominal Zener voltage (V_Z) is specified at I_Z = 5 mA, with a temperature coefficient of approximately +2.5 mV/K near this current - enabling predictable drift compensation in bias networks.

The SOD27 package provides hermetic sealing for long-term stability in humid or corrosive environments, while its axial lead configuration supports through-hole mounting on FR4 PCBs without thermal pads. Junction-to-ambient thermal resistance is 380 K/W in free air, limiting continuous power dissipation to 500 mW at T_amb ≤ 25 °C.

Key Specifications

Pinout & Package

The NZX13B,133 uses a two-terminal axial-leaded SOD27 (SC-40) hermetically sealed glass package. The cathode is marked by a colored band on the glass body; leads are tinned copper alloy suitable for wave or hand soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55-C13 and 1N4742A, NZX13B,133 offers superior long-term parameter stability and high-temperature capability due to its hermetic SOD27 construction - making it preferred for industrial sensing and power supply references where calibration drift must be minimized over decades.

Availability

NZX13B,133 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and overvoltage protection circuits requiring stable component supply with guaranteed long-lifecycle availability and traceable sourcing.

Supply support for NZX13B,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, reliable discrete, logic, and MOSFET devices with focus on efficiency, reliability, and miniaturization for industrial, automotive, and consumer markets.

The NZX series targets general-purpose Zener regulation with emphasis on hermetic stability, low leakage, and wide temperature operation - specifically engineered for analog reference and protection functions in harsh-environment electronics.

FAQ

What is the maximum continuous reverse current the NZX13B,133 can sustain without degradation?

The NZX13B,133 is rated for a maximum forward current of 250 mA per Absolute Maximum Ratings (Table 5), but its Zener operation relies on controlled reverse current. At I_Z = 5 mA, it delivers nominal 13 V regulation; sustained reverse current beyond 50 mA requires thermal derating per R_th(j-a) = 380 K/W, and continuous operation above 100 mA risks exceeding 175 °C junction temperature even at 25 °C ambient.

Does the NZX13B,133 meet automotive qualification standards?

No - the NZX13B,133 is explicitly designated as a non-automotive qualified product in Nexperia's legal disclaimers (Section 11.3). It has not undergone AEC-Q101 stress testing or automotive-grade screening, and its datasheet does not specify automotive-grade temperature cycling, humidity resistance, or failure-in-time (FIT) rates required for vehicle applications.

How does the SOD27 package affect PCB layout and thermal performance?

The SOD27 package uses axial leads with 25.4 mm minimum lead length and 4.25 mm maximum body diameter. Its thermal resistance to ambient is 380 K/W in free air, so PCB layout must avoid excessive copper pour near leads to prevent unintended heat sinking; recommended mounting follows Nexperia's FR4 guideline with ≤8 mm lead length and no metallization pad to maintain specified R_th(j-a).

Can the NZX13B,133 be used in series or parallel configurations for higher voltage or current handling?

Series connection is feasible for higher voltage clamping (e.g., two NZX13B,133 yield ~26 V), but mismatched V_Z tolerances cause uneven voltage distribution. Parallel use is strongly discouraged - slight V_Z differences result in one diode conducting most current, leading to thermal runaway. For higher current, use a single higher-power Zener or active regulation instead.