Diodes Incorporated MMBZ5258BTS-7-F

Overview

MMBZ5258BTS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array in SOT363 package, providing three isolated 36V ±5% Zener junctions with 3.4mA test current, 70Ω dynamic impedance at 1kHz, and 0.1μA reverse leakage at 27V. It delivers precision voltage regulation in space-constrained power rail protection and signal clamping applications.

For engineers reviewing the MMBZ5258BTS-7-F datasheet, MMBZ5258BTS-7-F pinout, MMBZ5258BTS-7-F application, or MMBZ5258BTS-7-F equivalent, key selection criteria include nominal Zener voltage (36V), Zener impedance (70Ω), power dissipation (200mW), thermal resistance (625°C/W), 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 compact multi-rail voltage reference or bidirectional ESD/transient suppression without inter-device coupling. Each diode operates independently with identical 36V nominal breakdown and shares common thermal characteristics due to monolithic construction.

Designed for automated SMT assembly, it supports lead-free reflow profiles per J-STD-020D Level 1 moisture sensitivity and achieves stable regulation under pulsed 3.4mA Zener test conditions while maintaining ≤0.1μA leakage at VR = 27V - critical for low-power sensor interface and standby circuit integrity.

Key Specifications

Pinout & Package

Package: SOT363 - ultra-compact 6-pin surface-mount plastic case (2.10 × 1.30 × 0.95 mm), UL 94V-0 rated, with matte tin-plated Alloy 42 leads and orientation mark (KRD) on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C36LT1G and MMBZ5258BS-7-F, the MMBZ5258BTS-7-F uniquely delivers three isolated 36V Zeners in one SOT363 package - reducing component count by 67%, minimizing inter-trace coupling, and simplifying layout for multi-supply systems where channel independence is mandatory.

Availability

MMBZ5258BTS-7-F is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, USB-C port protection, and medical instrument reference circuits requiring stable component supply and AEC-Q101 reliability assurance.

Supply support for MMBZ5258BTS-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 consumer markets with ISO/TS 16949 and ISO 14001 certifications.

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

FAQ

What is the maximum continuous power dissipation for MMBZ5258BTS-7-F on a standard FR4 PCB?

The device is rated for 200mW continuous power dissipation when mounted on FR4 with Diodes Incorporated's recommended pad layout (AP02001). Derating begins linearly above +25°C ambient, reaching zero dissipation at +150°C per the published power derating curve (Figure 1).

Can MMBZ5258BTS-7-F be used for bidirectional ESD protection?

No - this is a unidirectional Zener array with anode-cathode polarity per channel. For bidirectional ESD clamping, external series resistors and back-to-back configurations would be required; dedicated TVS arrays like D3V3M1U2LP are better suited for true bidirectional protection.

Is the 36V Zener voltage specified at DC or AC conditions?

The 36V nominal Zener voltage is measured under DC pulse conditions (short duration, 3.4mA test current) to minimize self-heating. Dynamic impedance (70Ω) is specified at 1kHz, confirming stable regulation behavior under small-signal AC perturbations typical in feedback loops.

Does the SOT363 package support hand soldering or only reflow assembly?

The SOT363 package is optimized for automated reflow soldering per J-STD-020D Level 1. While possible with fine-tip irons and flux, hand soldering is not recommended due to thermal mass imbalance across six closely spaced terminals and risk of tombstoning or cold joints.