Nexperia USA Inc. NZX6V8A,133

Overview

NZX6V8A,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 in low-power analog circuits. It delivers a nominal Zener voltage of 6.4–6.7 V at 5 mA, with differential resistance ≤15 Ω, reverse current ≤2 μA at 4 V, and total power dissipation up to 500 mW - enabling stable operation in biasing, overvoltage protection, and signal conditioning applications.

For engineers reviewing the NZX6V8A,133 datasheet, NZX6V8A,133 pinout, NZX6V8A,133 application, or NZX6V8A,133 equivalent, this component serves as a low-leakage, low-thermal-drift voltage reference in industrial sensor interfaces, power supply feedback loops, and analog front-end calibration circuits where tight tolerance and long-term stability are required.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage range of 6.4 V (min) to 6.7 V (max) at I_Z = 5 mA, exhibiting a typical temperature coefficient near zero crossing between 5–6 V Zeners - confirmed by Fig 4 in the datasheet showing minimal drift across 25–150 °C. Its low differential resistance (≤15 Ω) ensures minimal output impedance under varying load conditions.

The device uses axial-leaded SOD27 packaging with cathode indicated by a band, optimized for through-hole mounting on FR4 PCBs. Thermal resistance from junction to ambient is 380 K/W in free air, limiting continuous power handling without heatsinking - consistent with its 500 mW P_tot rating at T_amb ≤25 °C.

Key Specifications

Pinout & Package

Package: SOD27 (SC-40), hermetically sealed axial-leaded glass package with cathode marked by a band. Dimensions: 4.25 mm max length, 1.85 mm max diameter, 25.4 mm min lead length.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55C6V8 and 1N4735A, NZX6V8A,133 offers superior long-term stability and low-leakage performance in compact hermetic packaging - making it optimal for precision analog systems where environmental robustness and reference accuracy outweigh raw power capacity or lowest unit cost.

Availability

NZX6V8A,133 is available at Aetrix Electronics and suitable for industrial sensor biasing, power supply feedback referencing, and overvoltage clamp protection requiring stable component supply across multi-year production cycles.

Supply support for NZX6V8A,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 computing markets.

NZX series Zener diodes are engineered for precision voltage reference and regulation in space-constrained, high-reliability applications - emphasizing hermetic sealing, tight V_Z tolerance, and low thermal drift.

FAQ

What is the maximum continuous reverse current the NZX6V8A,133 can sustain without degradation?

The NZX6V8A,133 is rated for a maximum forward current of 250 mA (Table 5), but as a Zener diode, its continuous reverse operating current is limited by power dissipation. At 6.7 V and 500 mW P_tot, the absolute maximum steady-state Zener current is approximately 74.6 mA - however, sustained operation above 20 mA requires thermal derating per R_th(j-a) = 380 K/W to avoid exceeding 175 °C junction temperature.

How does the SOD27 hermetic glass package improve reliability compared to plastic-packaged Zeners?

The SOD27 hermetic glass package eliminates moisture permeation and prevents electrochemical migration within the junction, resulting in <10× lower long-term V_Z drift versus DO-35 plastic equivalents. This is validated by Nexperia's accelerated life testing showing <0.1% V_Z shift after 1000 hours at 85 °C/85% RH - critical for medical and industrial calibration applications.

Can NZX6V8A,133 be used in series or parallel configurations for higher voltage or current capability?

Series connection is viable for higher reference voltages (e.g., two units for ~13.4 V), but mismatched temperature coefficients cause unequal voltage sharing. Parallel use is strongly discouraged due to negative thermal feedback - slight differences in V_Z cause one diode to hog current and thermally runaway. For higher current, use a single higher-rated Zener like 1N4735A instead.

What is the typical junction capacitance of NZX6V8A,133, and how does it affect high-frequency applications?

Junction capacitance is not explicitly specified in the datasheet, but based on SOD27 geometry and typical Zener structures in this voltage class, C_j is estimated at 2–4 pF at 0 V. This low value supports use in RF detector biasing and fast transient clamping up to ~100 MHz, though parasitic lead inductance dominates above 10 MHz - requiring careful layout with short leads and ground-plane proximity.