Diodes Incorporated MMBZ5245BTS-7-F

Overview

MMBZ5245BTS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array in SOT363 package, providing three isolated 15 V ±5% Zener references with 8.5 mA test current, 16 Ω dynamic impedance at 8.5 mA, and 0.1 µA reverse leakage at 11 V. It delivers precision voltage regulation for low-power biasing and protection in compact analog signal chains.

For engineers reviewing the MMBZ5245BTS-7-F datasheet, MMBZ5245BTS-7-F pinout, MMBZ5245BTS-7-F application, or MMBZ5245BTS-7-F equivalent, key selection criteria include Zener voltage tolerance (±5%), low leakage (<0.1 µA @ 11 V), thermal resistance (625 °C/W), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device integrates three independent Zener diodes in a single ultra-small SOT363 package, enabling space-constrained designs requiring multiple stable reference voltages without discrete placement. Each diode operates with nominal 15 V breakdown, specified at 8.5 mA test current and characterized down to 0.25 mA knee current (ZZK = 600 Ω).

Thermal derating follows a linear curve from 200 mW at 25 °C ambient to zero at 150 °C, with junction-to-ambient thermal resistance fixed at 625 °C/W on FR4 PCB per recommended pad layout. Reverse leakage remains ≤0.1 µA up to 11 V, supporting high-impedance sensing nodes.

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, lead-free matte tin plating over Alloy 42 leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5245BTS-7-F, the MMBZ5245BS-7-F saves die area per function but increases placement count and BOM complexity, while the BZX84-C15LT1G offers lower unit cost but lacks AEC-Q101 validation and integrated multi-Zener topology required for space-constrained automotive modules.

Availability

MMBZ5245BTS-7-F is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog front-end protection, portable medical instrument reference, and telecom line card voltage supervision requiring stable component supply and AEC-Q101 compliance.

Supply support for MMBZ5245BTS-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, with design and manufacturing operations across Asia and the Americas.

The MMBZ52xxBTS series belongs to Diodes' precision Zener diode portfolio, engineered specifically for high-reliability, space-constrained applications demanding tight voltage tolerance, low leakage, and automotive qualification.

FAQ

What is the maximum power dissipation for MMBZ5245BTS-7-F at 85°C ambient?

At 85°C ambient, the device's power dissipation must be derated linearly from 200 mW at 25°C using the 625 °C/W thermal resistance. The allowable power is 200 mW × (1 − (85 − 25)/125) = 80 mW - verified per Figure 1 in DS30184 Rev. 13-2.

Can MMBZ5245BTS-7-F be used in forward-bias mode as a regular diode?

Yes - its forward voltage is specified at 0.9 V @ 10 mA, matching typical silicon diode behavior. However, it is optimized for reverse-bias Zener operation; forward conduction is secondary and not characterized beyond VF, so it should not replace purpose-built rectifiers or switching diodes.

How are the three Zener diodes isolated electrically in the SOT363 package?

All six terminals (A1/C1, A2/C2, A3/C3) are fully isolated - no internal connection exists between any anode or cathode pair. This is confirmed by the "three isolated Zeners" feature statement and the independent pin labeling in the top-view diagram, enabling independent biasing or clamping functions per channel.

Is the MMBZ5245BTS-7-F marking code visible on the device surface?

Yes - the top-side marking is "KR4" followed by a two-character date code (e.g., "A9" for September 2013), as defined in the Marking Information section of DS30184. "KR4" uniquely identifies the 15 V variant within the MMBZ5221BTS–MMBZ5259BTS family.