Diodes Incorporated MMBZ5228BTS-7-F

Overview

MMBZ5228BTS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array in SOT363 package, providing three isolated 3.9 V ±5% Zener references with 20 mA test current, 23 Ω dynamic impedance at 20 mA, and 10 µA reverse leakage at 1.0 V. It delivers precision voltage regulation for low-power biasing and signal clamping in compact automotive and industrial sensor interfaces.

For engineers reviewing the MMBZ5228BTS-7-F datasheet, MMBZ5228BTS-7-F pinout, MMBZ5228BTS-7-F application, or MMBZ5228BTS-7-F equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (625 °C/W), triple-diode isolation, SOT363 footprint compatibility, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device integrates three electrically isolated Zener diodes in a single ultra-small SOT363 package, enabling space-constrained designs requiring multiple independent reference or clamp functions. Each diode operates with nominal 3.9 V breakdown, 20 mA test current, and exhibits 23 Ω zener impedance at I_ZT, supporting stable regulation under moderate load variation.

Designed for automated assembly and qualified to AEC-Q101, it features lead-free matte tin plating, UL 94V-0 mold compound, and moisture sensitivity level 1 - ensuring robust manufacturability and long-term reliability in automotive control modules and industrial PCBs operating from –65 °C to +150 °C.

Key Specifications

Pinout & Package

Package: SOT363 - ultra-compact 6-pin surface-mount plastic package (2.10 mm × 1.30 mm × 0.95 mm), UL 94V-0 rated, with lead-free matte tin terminations and moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C3V9LT1G and MMBZ5228BS-7-F, MMBZ5228BTS-7-F uniquely combines triple-diode integration, SOT363 miniaturization, and AEC-Q101 validation - making it optimal for next-gen automotive ECUs and space-constrained industrial IoT nodes where footprint, reliability, and functional density are jointly constrained.

Availability

MMBZ5228BTS-7-F is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial current-sense biasing, USB-C power delivery clamp circuits, and smart meter reference subsystems requiring stable component supply and long-term lifecycle support.

Supply support for MMBZ5228BTS-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 integrated circuits, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The MMBZ52xxBTS series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive and industrial applications demanding high reliability, small form factor, and consistent voltage reference performance across extended temperature ranges.

FAQ

What is the maximum power dissipation for MMBZ5228BTS-7-F at 70°C ambient?

At 70°C ambient, the device's power dissipation must be derated from its 200 mW maximum at 25°C. Using the linear derating curve (625 °C/W), allowable power = 200 mW × (1 − (70 − 25)/625) = 140 mW. This ensures junction temperature remains below 150°C under continuous DC operation with proper PCB copper area.

Can MMBZ5228BTS-7-F replace a single 3.9 V Zener in existing SOT23 designs?

No - MMBZ5228BTS-7-F uses SOT363 (6-pin) packaging with three isolated diodes, while SOT23 accommodates only one. Direct replacement requires PCB redesign to accommodate the different pin count, footprint, and terminal mapping. However, it can consolidate three SOT23 Zeners into one location, reducing total component count and placement cost.

Is the 3.9 V Zener voltage specified at DC or pulsed conditions?

The 3.9 V nominal Zener voltage is measured under short-duration pulse conditions (20 mA, 10 ms duty cycle) to minimize self-heating effects, as stated in Note 7 of the datasheet. For DC operation, thermal derating must be applied to maintain accuracy within the ±5% tolerance band, especially above 25°C ambient.

Does MMBZ5228BTS-7-F support bidirectional ESD protection?

No - it is a unidirectional Zener diode array optimized for voltage regulation and clamping in forward-biased (anode-grounded) configurations. Its reverse breakdown is sharp and controlled, but it lacks symmetric bidirectional clamping capability like TVS diodes. For ESD protection, dedicated TVS arrays such as D3V3Z5U2P are recommended.