Diodes Incorporated MMBZ5254BTS-7-F

Overview

MMBZ5254BTS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array in SOT363 package, providing three isolated 27 V ±5% Zener references with 5.0 mA test current, 41 Ω dynamic impedance at 5 mA, and ≤0.1 µA reverse leakage at 21 V. It delivers precision voltage regulation for compact power rail clamping and signal-level protection in automotive control modules.

For engineers reviewing the MMBZ5254BTS-7-F datasheet, MMBZ5254BTS-7-F pinout, MMBZ5254BTS-7-F application, or MMBZ5254BTS-7-F equivalent, key selection criteria include its 27 V nominal Zener voltage, 200 mW total power dissipation, triple-diode isolation in ultra-small SOT363, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device integrates three electrically independent Zener diodes in a single 6-pin SOT363 package, each rated for 27 V nominal breakdown with tight 25.65–28.35 V tolerance at 5.0 mA. Its 41 Ω Zener impedance at I_ZT ensures stable regulation under moderate load transients.

Designed for high-reliability surface-mount applications, it operates across –65 °C to +150 °C, supports automated assembly, and meets AEC-Q101 stress testing requirements including temperature cycling, HTRB, and ESD (HBM ≥2 kV). Thermal resistance is 625 °C/W on FR4 board per recommended pad layout.

Key Specifications

Pinout & Package

Package: SOT363 (6-pin, dual-row surface-mount), case material molded plastic UL 94V-0, weight 0.006 g. Pin 1 = Cathode of Diode 1, Pin 2 = Anode of Diode 1, Pin 3 = Cathode of Diode 2, Pin 4 = Anode of Diode 2, Pin 5 = Cathode of Diode 3, Pin 6 = Anode of Diode 3 - all diodes are isolated with no internal connection between anodes or cathodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C27LT1G and MMBZ5254BS-7-F, the MMBZ5254BTS-7-F uniquely delivers three AEC-Q101-qualified 27 V Zeners in one SOT363 package-reducing component count by two, saving >3 mm² PCB area, and ensuring matched thermal drift across channels.

Availability

MMBZ5254BTS-7-F is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog input stages, and medical infusion pump feedback circuits requiring stable component supply with guaranteed long-term availability.

Supply support for MMBZ5254BTS-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, specializing in high-reliability components for automotive, industrial, and computing markets since 1960.

The MMBZ52xxBTS series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for space-constrained, high-temperature voltage reference and transient suppression in automotive electronics.

FAQ

What is the maximum reverse voltage (V_R) this device can withstand before breakdown?

The MMBZ5254BTS-7-F has a nominal Zener voltage of 27 V with a tolerance of ±5%, meaning breakdown occurs between 25.65 V and 28.35 V at 5.0 mA test current. Its absolute maximum reverse voltage rating is not defined separately - operation beyond the specified V_Z range risks irreversible avalanche conduction and thermal runaway unless current is strictly limited by external series resistance.

Can this triple-Zener array be used for bidirectional TVS protection?

No - the MMBZ5254BTS-7-F contains three anode-cathode pairs configured only for unidirectional Zener operation (cathode-positive bias). It lacks back-to-back diode structures required for symmetric ±V_BR clamping. For bidirectional transient suppression, dedicated TVS arrays like D3V3F4U30-7 or SMAJ27A are required.

How does the 200 mW power rating apply across the three diodes?

The 200 mW rating is the total package power dissipation limit. If all three diodes conduct simultaneously at their rated 5.0 mA, total power is 3 × (27 V × 5 mA) = 405 mW - exceeding the rating. Safe operation requires either sequential activation or current limiting to ensure sum of individual diode powers stays ≤200 mW, e.g., 3 mA per diode yields 243 mW and remains within margin.

Is the SOT363 package compatible with standard reflow profiles for lead-free soldering?

Yes - the MMBZ5254BTS-7-F uses matte tin-plated leads qualified to JEDEC J-STD-020D Level 1 moisture sensitivity and supports peak reflow temperatures up to 260 °C. Its UL 94V-0 mold compound withstands standard Pb-free reflow profiles (e.g., IPC/JEDEC J-STD-020 Class 3), with no pre-bake required due to Level 1 classification.