Nexperia USA Inc. BZV85-C33,113

Overview

BZV85-C33,113 from Nexperia is a medium-power Zener voltage regulator diode in a hermetically sealed SOD66 (DO-41) glass package, rated for 33 V nominal working voltage with ±5 % tolerance, 1.3 W total power dissipation at 25 °C, and 60 W non-repetitive peak reverse power. It provides stable voltage reference in low-to-medium current linear regulation circuits, commonly used in power supply feedback loops and overvoltage protection stages.

For engineers reviewing the BZV85-C33,113 datasheet, BZV85-C33,113 pinout, BZV85-C33,113 application, or BZV85-C33,113 equivalent, key selection criteria include its 33 V Zener voltage, 45 Ω typical differential resistance at test current, −0.05 µA reverse leakage at 25.4 V, 23 A non-repetitive peak reverse current (tp = 100 µs), and thermal resistance of 110 K/W (junction-to-tie-point, 4 mm lead length).

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable DC reference voltage across its terminals under varying load and line conditions. Its temperature coefficient of +1.0 mV/K at 33 V enables predictable drift compensation in precision analog circuits.

The device uses axial-leaded glass encapsulation with cathode band marking, optimized for PCB mounting with ≥1 cm² copper per lead. Thermal performance is defined by junction-to-tie-point (110 K/W) and junction-to-ambient (175 K/W) resistances, supporting reliable operation up to 200 °C junction temperature.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD66 (DO-41) glass package with cathode identified by a colored band. Dimensions: D = 2.6 mm (max), L = 25.4 mm (max), b = 0.81 mm (min). Designed for through-hole PCB assembly with 4 mm lead-to-body spacing for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4745A and BZX85C33, BZV85-C33,113 delivers superior thermal stability (110 K/W R_th(j-t)), tighter regulation (45 Ω r_dif), and hermetic reliability-making it preferred for industrial power supplies and safety-critical clamping where long-term parameter consistency matters.

Availability

BZV85-C33,113 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, analog sensor excitation, and battery voltage monitoring requiring stable component supply and long-term parametric consistency.

Supply support for BZV85-C33,113 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 automotive, industrial, and consumer markets.

The BZV85 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage reference and shunt regulation in harsh-environment applications demanding hermetic sealing and tight parametric control.

FAQ

What is the maximum continuous reverse current this Zener can handle at 33 V?

The BZV85-C33,113 is rated for 8 mA test current (I_test) and supports up to 500 mA forward current, but its continuous reverse conduction is limited by power dissipation. At 33 V, sustained operation above ~39 mA exceeds 1.3 W P_tot, so derating is required above 25 °C ambient. Thermal design must ensure junction temperature stays ≤200 °C.

How does the +1.0 mV/K temperature coefficient affect circuit accuracy over temperature?

A +1.0 mV/K coefficient means the Zener voltage increases by 1 mV per Kelvin rise in junction temperature. Over a 100 K range (−40 °C to +60 °C), this introduces ±100 mV drift in a 33 V reference-approximately ±0.3 %. This is acceptable for non-precision regulation but requires compensation in high-accuracy sensor references.

Can this diode be used in parallel for higher power dissipation?

No-Zener diodes exhibit negative temperature coefficients at low voltages and positive ones above ~5 V, but even within the same batch, slight V_Z mismatches cause current hogging. Parallel operation without individual ballast resistors risks thermal runaway. For >1.3 W, use a single higher-rated device or active regulation.

Is the SOD66 (DO-41) package compatible with automated through-hole insertion equipment?

Yes-the SOD66 package has standardized axial leads with 25.4 mm overall length and 2.6 mm body diameter, conforming to IPC-7351 guidelines for DO-41 footprints. Lead spacing and bend geometry support standard wave soldering and auto-insertion tooling, provided board hole size and pad design follow Nexperia's recommended land pattern.