Nexperia USA Inc. BZX79-C3V6,133

Overview

BZX79-C3V6,133 from Nexperia is a ±5% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, designed for low-power voltage reference and stabilization at 3.6 V nominal with 5 mA test current, 375 Ω typical differential resistance, and −2.4 mV/K temperature coefficient. It supports stable biasing in sensor signal conditioning, power supply feedback loops, and microcontroller reset circuits.

For engineers reviewing the BZX79-C3V6,133 datasheet, BZX79-C3V6,133 pinout, BZX79-C3V6,133 application, or BZX79-C3V6,133 equivalent, this page delivers verified electrical parameters, thermal limits, reverse leakage behavior at VR = 1 V (≤5 μA), and direct substitution guidance for discrete voltage reference design.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal regulation voltage of 3.6 V at I_Ztest = 5 mA, exhibiting a tight working voltage range of 3.4 V to 3.8 V (±5%). Its differential resistance of 375 Ω (typ.) and temperature coefficient of −2.4 mV/K (at 5 mA) define its load regulation and thermal drift performance in precision reference applications.

The device is rated for 500 mW total power dissipation at T_amb = 50 °C (with 8 mm lead length), and withstands non-repetitive peak reverse power up to 40 W for 100 μs pulses. Reverse leakage remains ≤5 μA at VR = 1 V, ensuring low quiescent current draw in battery-sensitive designs.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a band. Leads are tinned copper-clad steel; body diameter 1.85 mm, length 4.25 mm, lead spacing 25.4 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX79-C3V6,133, the 1N4729A offers superior surge capability and lower impedance but requires more PCB space, while the BZX55-C3V6 matches the DO-35 footprint but trades off tighter leakage control and lower differential resistance for legacy compatibility.

Availability

BZX79-C3V6,133 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset circuits, and linear regulator feedback networks requiring stable component supply and long-lifecycle support.

Supply support for BZX79-C3V6,133 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 leader in discrete, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, and consumer markets with high-volume, high-reliability components.

The BZX79 series belongs to Nexperia's standard voltage regulator diode product line, engineered for cost-effective, stable DC voltage referencing in space-constrained, low-power analog and mixed-signal systems.

FAQ

What is the maximum continuous power dissipation for BZX79-C3V6,133?

The BZX79-C3V6,133 is rated for 500 mW total power dissipation at ambient temperature of 50 °C with 8 mm lead length, per IEC 60134 limiting values. Derating is required above 50 °C at 4.2 mW/°C based on R_{th j-a} = 380 K/W. This defines safe continuous operation in standard PCB layouts without heatsinking.

How does the temperature coefficient affect regulation accuracy?

With a typical temperature coefficient of −2.4 mV/K at 5 mA, the BZX79-C3V6,133 exhibits predictable negative drift: output voltage decreases by ~2.4 mV per degree Celsius rise. Over a −40 °C to +125 °C junction range, this results in ~396 mV total shift, requiring compensation in high-accuracy references but enabling stable bias in moderate-precision applications.

Can BZX79-C3V6,133 be used in place of a 3.3 V Zener diode?

No - the BZX79-C3V6,133 is specified for 3.6 V nominal regulation at 5 mA, not 3.3 V. Substituting it for a 3.3 V part would raise the reference voltage by ~300 mV, potentially causing incorrect reset thresholds or feedback errors. For 3.3 V, use BZX79-C3V3 (3.3 V, ±5%) instead, which shares identical package, power rating, and thermal characteristics.

Is the SOD27 package compatible with automated through-hole assembly?

Yes - the SOD27 (DO-35) package features axial leads with standardized 25.4 mm pitch and tinned copper-clad steel leads, fully compatible with wave soldering and selective soldering processes. Its hermetic glass body withstands typical reflow and cleaning chemistries, and the cathode band provides unambiguous orientation for automated optical inspection and placement verification.