Diodes Incorporated BZX84B36-7-F

Overview

BZX84B36-7-F from Diodes Incorporated is a precision 36 V ±2% tolerance Zener diode in SOT23 package, rated for 350 mW power dissipation at ambient temperature, with 90 Ω dynamic impedance at 2 mA test current and 0.1 µA maximum reverse leakage at 25.2 V, used for voltage regulation and reference in low-power analog circuits.

For engineers reviewing the BZX84B36-7-F datasheet, BZX84B36-7-F pinout, BZX84B36-7-F application, or BZX84B36-7-F equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (357 °C/W), low leakage (0.1 µA @ 25.2 V), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and supply conditions. It delivers precise regulation with nominal 36 V output at 2 mA test current, ±2% initial tolerance, and a positive temperature coefficient of +30.4 mV/°C above 6 V.

The device uses silicon planar epitaxial construction with fully lead-free, halogen- and antimony-free "Green" packaging. Its SOT23 footprint supports automated pick-and-place assembly and complies with J-STD-020 moisture sensitivity Level 1.

Key Specifications

Pinout & Package

Package: SOT23 - molded plastic case with matte tin-plated alloy 42 leadframe; polarity marked by cathode band on top view; dimensions: 2.90 mm × 1.30 mm × 1.00 mm (L × W × H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5245B-7-F and BZX84-C36, BZX84B36-7-F offers tighter ±2% tolerance, lower Zener impedance at 2 mA, and AEC-Q101 qualification-making it preferred for automotive and precision analog reference applications where regulation accuracy and reliability are prioritized.

Availability

BZX84B36-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and portable medical diagnostic devices requiring stable component supply and long-term lifecycle assurance.

Supply support for BZX84B36-7-F 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.

The BZX84 series belongs to Diodes' precision Zener diode product line, engineered for stable voltage reference and regulation in space-constrained, high-volume surface-mount applications demanding tight tolerance and AEC-Q101 compliance.

FAQ

What is the maximum reverse voltage (V_R) at which leakage remains ≤0.1 µA?

The BZX84B36-7-F exhibits ≤0.1 µA reverse leakage at V_R = 25.2 V, corresponding to 70% of its nominal 36 V Zener voltage. This value is specified in the Electrical Characteristics table under "Maximum Reverse Current" and is measured at T_A = 25°C with no self-heating effects.

Is BZX84B36-7-F suitable for use in a 125°C ambient environment?

No - the device's maximum operating temperature is +150°C, but its power derating curve (Figure 1) shows that at 125°C ambient, allowable power dissipation drops to ~120 mW. For sustained operation at that temperature, design must limit Zener current to ≤340 µA to stay within safe thermal limits.

Does the SOT23 package have an exposed pad for thermal enhancement?

No - the SOT23 package used for BZX84B36-7-F has no exposed thermal pad. Thermal performance relies solely on conduction through the three leads and PCB copper area. The recommended pad layout (from Diodes' package outline document) maximizes heat spreading using 2.9 mm × 0.9 mm solder pads for Pin 2 (cathode) and Pin 1 (anode).

How does the +30.4 mV/°C temperature coefficient affect long-term voltage stability?

The +30.4 mV/°C coefficient means the Zener voltage increases by ~1.09 V over a 36°C rise (e.g., from 25°C to 61°C). In closed-loop systems, this drift is often compensated by complementary circuitry; in open-loop references, it introduces predictable, linear error that must be factored into system calibration routines.