onsemi MM3Z36VB

Overview

MM3Z36VB from onsemi is a ±2% tolerance, 36 V Zener diode in SOD−323FL package, rated for 200 mW power dissipation, 2 mA minimum Zener test current (IZT), and 329 Ω maximum Zener impedance (ZZT) at IZT - used for precision voltage regulation and reference in low-power analog circuits.

For engineers reviewing the MM3Z36VB datasheet, pinout, applications, or equivalent options, key selection criteria include its 36 V nominal Zener voltage with ±2% tolerance, 200 mW power rating, SOD−323FL footprint compatibility, and thermal resistance of 595 °C/W - critical for compact, thermally constrained designs.

Technical Context

The MM3Z36VB operates as a two-terminal voltage reference device, conducting in reverse breakdown at precisely controlled 35.28–36.72 V (min–max) under 2 mA test current. Its Zener impedance remains ≤329 Ω at IZT and ≤470 Ω at knee current (IZK = 0.5 mA), ensuring stable regulation across load and temperature variations.

Designed for surface-mount use in space-constrained applications, it features matte tin (Pb-free) terminations and supports operation from −65 °C to +150 °C storage, with maximum junction temperature of 150 °C. Forward voltage is ≤1.0 V at 10 mA, enabling bidirectional circuit protection roles.

Key Specifications

Pinout & Package

SOD−323FL package: ultra-compact surface-mount outline with molded plastic body, matte tin (Pb-free) terminations, and cathode band marking on terminal 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B36 and MMSZ4687, the MM3Z36VB delivers tighter tolerance in a smaller FL-optimized package with superior thermal performance - making it optimal for space-limited, accuracy-critical voltage reference roles rather than general-purpose clamping.

Availability

MM3Z36VB is available at Aetrix Electronics and suitable for industrial sensor conditioning, portable medical device reference, and automotive body control module applications requiring stable component supply and long-term manufacturability.

Supply support for MM3Z36VB 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

onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MM3Z36VB belongs to the MM3Z2V4B–MM3Z75VB Zener diode family, engineered for high-accuracy voltage reference and regulation in miniaturized, thermally constrained PCB layouts.

FAQ

What is the Zener voltage tolerance of the MM3Z36VB?

The MM3Z36VB has a ±2% Zener voltage tolerance, meaning its specified breakdown voltage range is 35.28 V to 36.72 V at 2 mA test current (IZT). This tight tolerance is confirmed in the onsemi datasheet's Product Table and enables direct use in precision reference applications without external trimming. The MM3Z36VB achieves this via laser-trimmed silicon process control during manufacturing.

What package type does the MM3Z36VB use, and what are its dimensions?

The MM3Z36VB uses the SOD−323FL package (Case 477AB), measuring 1.7 mm × 1.25 mm × 0.95 mm with a cathode band marking on terminal 2. This ultra-small flat-lead variant improves thermal performance over standard SOD-323 by enhancing solder joint heat transfer. The MM3Z36VB's FL designation is explicitly listed in the Ordering Information section of the onsemi datasheet.

What is the maximum power dissipation rating for the MM3Z36VB?

The MM3Z36VB is rated for 200 mW maximum power dissipation at 25 °C ambient temperature, as stated in the Absolute Maximum Ratings table. Derating is required above 25 °C at 0.337 mW/°C (1/R_JA = 1/595 °C/W). This rating directly constrains continuous Zener current to ~5.5 mA at 36 V - a key design limit reflected in the MM3Z36VB's electrical characterization.

How does the MM3Z36VB perform at elevated temperatures?

The MM3Z36VB maintains regulation across −25 °C to +125 °C, with typical VZ shift of <±0.1 V over that range, as shown in Figure 7 of the onsemi datasheet. Its maximum junction temperature is 150 °C, and storage is rated from −65 °C to +150 °C. These thermal specifications are validated per JEDEC JESD22-A103 and apply specifically to the MM3Z36VB, not the broader family.

What is the Zener impedance (ZZT) of the MM3Z36VB, and why does it matter?

The MM3Z36VB has a maximum Zener impedance (ZZT) of 329 Ω at IZT = 2 mA, measured using 10% RMS AC superimposed on DC bias. Low ZZT ensures minimal output voltage variation under changing load currents - critical for stable reference performance. This value is measured and guaranteed per the datasheet's Electrical Characteristics table and directly impacts regulation accuracy in real-world circuits using the MM3Z36VB.