Diodes Incorporated MMBZ5245BS-7-F

Overview

MMBZ5245BS-7-F from Diodes Incorporated is a dual isolated 15 V, 200 mW surface-mount Zener diode in SOT-363 package, with nominal zener voltage 15.0 V (min 14.25 V, max 15.75 V) at 8.5 mA test current, 16 Ω dynamic impedance at 8.5 mA, and 0.1 μA reverse leakage at 11 V, used for precision voltage regulation and overvoltage protection in compact power management circuits.

For engineers reviewing the MMBZ5245BS-7-F datasheet, MMBZ5245BS-7-F pinout, MMBZ5245BS-7-F application, or MMBZ5245BS-7-F equivalent, key selection criteria include zener voltage tolerance (±5%), low leakage (<0.1 μA @ 11 V), thermal resistance (625 °C/W), dual-diode isolation, and RoHS-compliant SOT-363 footprint compatibility with automated assembly.

Technical Context

This dual-element Zener diode integrates two electrically isolated 15 V zener junctions in a single ultra-small SOT-363 package, enabling independent voltage reference or clamping functions per element without cross-coupling. Each diode operates with 200 mW total device power dissipation and supports stable regulation across −65 °C to +150 °C ambient range.

Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (16 Ω at 8.5 mA), while the matte tin–plated Alloy 42 leadframe delivers solderability per MIL-STD-202 Method 208 and meets J-STD-020D Level 1 moisture sensitivity requirements.

Key Specifications

Pinout & Package

SOT-363 is a 6-pin ultra-small outline transistors (USOT) package with dual isolated Zener elements. Pin assignment follows standard dual-diode configuration: Pins 1 & 2 form one Zener (anode/cathode), Pins 5 & 6 form the second Zener (anode/cathode), while Pins 3 & 4 are NC (no connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C15LT1G and MMBZ5245B-7-F, MMBZ5245BS-7-F uniquely delivers two isolated 15 V Zeners in one SOT-363, reducing component count by 50% and eliminating inter-device mismatch in matched-clamp topologies.

Availability

MMBZ5245BS-7-F is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB-C power delivery clamp circuits, automotive body control modules, and medical wearable battery monitors requiring stable component supply and long-term lifecycle continuity.

Supply support for MMBZ5245BS-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, industry-standard components for power management, signal integrity, and protection applications.

The MMBZ52xxBS series belongs to Diodes' precision Zener diode product line, engineered specifically for space-constrained, low-power voltage regulation and transient suppression in consumer, industrial, and automotive electronics.

FAQ

What is the maximum continuous reverse current the MMBZ5245BS-7-F can sustain without degradation?

The device is rated for 200 mW total power dissipation. At its nominal 15 V zener voltage, this corresponds to a maximum continuous reverse current of approximately 13.3 mA (200 mW ÷ 15 V). Exceeding this value risks thermal runaway, especially without adequate PCB copper area for heat dissipation per the recommended pad layout in AP02001.pdf.

How are the two Zener elements isolated internally, and can they share a common cathode connection?

The two Zener elements are fully isolated dielectrically-no internal connection exists between them. Pins 1/2 and Pins 5/6 operate as independent anode/cathode pairs. Sharing a cathode would require external wiring and defeats the purpose of built-in isolation; doing so may also violate thermal derating curves due to localized heating.

Does the "-7-F" suffix indicate tape-and-reel packaging, and what is the standard reel quantity?

Yes, "-7-F" denotes SOT-363 packaging on 3000-unit tape-and-reel per the ordering information in DS31039 Rev. 15–2. The "F" confirms lead-free/RoHS compliance, and the "7" specifies the SOT-363 variant. Reels conform to EIA-481-D standards and are compatible with standard pick-and-place feeders.

Can MMBZ5245BS-7-F be used in place of a single 15 V Zener like BZX55C15 in legacy designs?

Yes, but only one Zener element should be used (e.g., Pins 1/2), with Pins 3/4 left unconnected and Pins 5/6 either unused or grounded. The SOT-363 footprint differs from DO-35 or SOD-323 packages, requiring PCB layout revision. Electrical performance (V_Z, Z_ZT, I_R) matches closely, but thermal behavior differs due to package geometry and R_θJA.