Diodes Incorporated MMBZ5238BTS-7-F

Overview

MMBZ5238BTS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array in SOT363 package, providing three isolated 8.7 V ±5% Zener references with 200 mW total power dissipation, 8 Ω typical Zener impedance at 20 mA, and 3.0 µA max reverse leakage at 6.5 V. It serves voltage regulation and overvoltage protection in compact DC power rails and sensor bias networks.

For engineers reviewing the MMBZ5238BTS-7-F datasheet, MMBZ5238BTS-7-F pinout, MMBZ5238BTS-7-F application, or MMBZ5238BTS-7-F equivalent, key selection criteria include nominal Zener voltage (8.7 V), tight tolerance (±5%), low dynamic impedance (8 Ω @ 20 mA), ultra-small SOT363 footprint, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device integrates three electrically isolated Zener diodes in a single 6-pin SOT363 package, each with independent anode-cathode terminals. All three diodes share identical electrical specs: nominal Zener voltage 8.7 V, test current 20 mA, and maximum Zener impedance 8 Ω at I_ZT.

Designed for precision voltage reference and clamping, it operates within -65°C to +150°C ambient range, supports 200 mW total power dissipation (derated linearly above 25°C), and exhibits 600 µA max reverse leakage at VR = 6.5 V - enabling stable operation in low-power analog monitoring circuits.

Key Specifications

Pinout & Package

Package: SOT363 - six-terminal surface-mount plastic package with 0.65 mm pitch, UL 94V-0 rated molding compound, and matte tin-plated Alloy 42 leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C8V2LT1G and MMBZ5238BS-7-F, MMBZ5238BTS-7-F uniquely delivers three isolated 8.7 V Zeners in one AEC-Q101-qualified SOT363 package - reducing component count, PCB area, and qualification overhead in multi-rail automotive and industrial systems.

Availability

MMBZ5238BTS-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, and consumer power adapter feedback circuits requiring stable component supply and long-term lifecycle support.

Supply support for MMBZ5238BTS-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, manufacturing, and sales operations across Asia, Europe, and North America.

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

FAQ

What is the maximum continuous power dissipation per Zener element in MMBZ5238BTS-7-F?

The device has a total power dissipation limit of 200 mW across all three Zeners. Since they are isolated and thermally coupled on the same die, derating must be applied collectively - no single element may exceed 200 mW, and simultaneous full-load operation of all three requires thermal design consideration per AP02001 pad layout guidelines.

Does MMBZ5238BTS-7-F support bidirectional ESD protection?

No. This is a unidirectional Zener diode array optimized for DC voltage regulation and clamping. It lacks symmetric breakdown characteristics or specified ESD ratings (e.g., IEC 61000-4-2). For bidirectional transient suppression, dedicated TVS arrays like D3V3M1U2UP-7 should be used instead.

How does the 8.7 V Zener voltage tolerance affect accuracy in a 3.3 V LDO feedback network?

When used to set the feedback voltage of an adjustable LDO (e.g., via resistor divider), the ±5% Zener tolerance directly propagates to output voltage error. For a target 3.3 V output, this introduces up to ±165 mV deviation - acceptable for non-critical rails but insufficient for precision analog supplies requiring <1% regulation.

Can MMBZ5238BTS-7-F replace MMBZ5234BTS-7-F in an existing design?

No - MMBZ5234BTS-7-F is a 6.2 V Zener (KRG marking applies to MMBZ5238BTS-7-F only). Substituting 8.7 V for 6.2 V will cause incorrect regulation or overvoltage in feedback or clamp circuits. Always verify marking code (KRG) and electrical table entry before replacement.