Diodes Incorporated MMBZ5241BS-7

Overview

MMBZ5241BS-7 from Diodes Incorporated is a dual isolated 11 V Zener diode in SOT-363 package, rated for 200 mW power dissipation, 22 Ω zener impedance at 20 mA test current, and 2.0 μA reverse leakage at 8.4 V, used for precision voltage reference and overvoltage protection in space-constrained analog signal conditioning circuits.

For engineers reviewing the MMBZ5241BS-7 datasheet, MMBZ5241BS-7 pinout, MMBZ5241BS-7 application, or MMBZ5241BS-7 equivalent, key selection criteria include nominal zener voltage tolerance (±5%), thermal resistance (625 °C/W), dual-diode isolation, RoHS-compliant matte tin plating, and SOT-363 footprint compatibility with automated pick-and-place assembly.

Technical Context

This dual-Zener device integrates two electrically isolated 11 V zener junctions in a single ultra-small SOT-363 package, enabling independent voltage clamping or reference functions on adjacent signal paths without crosstalk. Its planar die construction ensures stable breakdown characteristics across -65 °C to +150 °C operating range.

Designed for low-power precision regulation, it delivers 10.45–11.55 V zener voltage at 20 mA, with 22 Ω dynamic impedance and <2.0 μA leakage below 8.4 V, supporting stable biasing in sensor interfaces and ADC reference buffers where thermal drift and leakage-induced offset must be minimized.

Key Specifications

Pinout & Package

SOT-363 package: 6-terminal, dual-isolated zener configuration with common cathode/anode layout; molded plastic case (UL 94V-0), 0.006 g mass, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-zener voltage reference applications.

Compared with BZX84-C11LT1G and MMBZ5241B-7-F, MMBZ5241BS-7 uniquely provides electrically isolated dual 11 V zeners in the smallest available footprint (SOT-363), enabling compact, crosstalk-free voltage limiting in multi-channel analog systems where thermal and leakage performance are critical.

Availability

MMBZ5241BS-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C port overvoltage protection, and low-power wearable battery monitoring requiring stable component supply and full RoHS compliance.

Supply support for MMBZ5241BS-7 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 centers across Asia and manufacturing facilities in China, Taiwan, and the U.S.

The MMBZ52xxBS series belongs to Diodes' precision Zener portfolio, engineered specifically for space-constrained, low-leakage voltage reference and clamping applications in portable and automotive electronics.

FAQ

What is the maximum reverse voltage that can be continuously applied to MMBZ5241BS-7 without conduction?

The maximum non-conducting reverse voltage is 8.4 V, specified as the voltage at which reverse leakage remains ≤2.0 μA. Exceeding this value initiates measurable zener current, with full breakdown occurring at the nominal 11 V zener voltage under 20 mA test conditions.

How does the SOT-363 package affect thermal performance compared to SOT-23?

The SOT-363 package has higher thermal resistance (625 °C/W) than typical SOT-23 devices (~300–400 °C/W) due to its smaller die attach area and dual-die construction. This requires strict adherence to the recommended FR4 pad layout and limits continuous power dissipation to 200 mW at 25 °C ambient.

Are the two zener elements in MMBZ5241BS-7 electrically connected internally?

No - the two zener elements are fully electrically isolated, with separate cathode (C1/C2) and anode (A1/A2) terminals and no internal bonding between them. The two NC pins are unconnected; all four active terminals must be routed independently on the PCB.

Can MMBZ5241BS-7 be used for bidirectional ESD protection on a differential signal pair?

Yes - by connecting C1/A1 across one line and C2/A2 across the complementary line, the device provides symmetrical ±11 V clamping. Its dual-isolation prevents common-mode coupling, making it suitable for RS-485 or CAN FD bus protection when combined with series current-limiting resistors.