Diodes Incorporated MMBZ5230BS-7-F

Overview

MMBZ5230BS-7-F from Diodes Incorporated is a dual isolated 4.7 V, 200 mW surface-mount Zener diode in SOT-363 package, with nominal zener voltage 4.7 V (min 4.47 V, max 4.94 V), zener test current 20 mA, dynamic impedance 19 Ω at I_ZT, and reverse leakage ≤5.0 μA at 2.0 V. It provides precision voltage reference and overvoltage clamping in space-constrained power management circuits.

For engineers reviewing the MMBZ5230BS-7-F datasheet, MMBZ5230BS-7-F pinout, MMBZ5230BS-7-F application, or MMBZ5230BS-7-F equivalent, key selection criteria include zener voltage tolerance (±5%), low dynamic impedance for stable regulation, dual-diode isolation for bidirectional protection, and RoHS-compliant SOT-363 footprint compatibility with high-density PCB layouts.

Technical Context

This device integrates two electrically isolated Zener diodes in a single SOT-363 package, enabling symmetrical voltage clamping or dual-rail reference generation without cross-coupling. Each diode operates independently with identical electrical specs: 4.7 V nominal breakdown, 20 mA test current, and 19 Ω zener impedance at 1 kHz.

Thermal performance is defined by 625 °C/W junction-to-ambient resistance on FR4 board with recommended pad layout, supporting continuous operation from –65 °C to +150 °C. The planar die construction ensures stable voltage regulation under transient load conditions and low leakage (<5 μA) at 2.0 V reverse bias.

Key Specifications

Pinout & Package

SOT-363 package with six terminals: two anodes (A1, A2), two cathodes (C1, C2), and two no-connect (NC) pins. Dual-diode isolation prevents interaction between channels in bidirectional ESD protection or dual-supply monitoring.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C4V7LT1G and MMBZ5230B-7-F, MMBZ5230BS-7-F uniquely delivers dual isolated 4.7 V regulation in one SOT-363 footprint-reducing component count by 50% and eliminating inter-channel crosstalk in safety-critical sensing nodes.

Availability

MMBZ5230BS-7-F is available at Aetrix Electronics and suitable for USB interface protection, low-power sensor references, and industrial PLC input conditioning requiring stable component supply and long-term lifecycle support.

Supply support for MMBZ5230BS-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.

The MMBZ52xxBS series targets space-constrained voltage regulation and ESD protection applications, emphasizing dual-diode integration, tight zener tolerance, and RoHS-compliant packaging for modern electronics assembly.

FAQ

What is the maximum reverse voltage this device can withstand before breakdown?

The MMBZ5230BS-7-F has a nominal zener voltage of 4.7 V with a guaranteed range of 4.47 V to 4.94 V at 20 mA test current. Its reverse breakdown is sharply defined within this band; operation below 4.47 V results in leakage <5 μA at 2.0 V, and sustained reverse bias above 4.94 V initiates controlled conduction. It is not rated for blocking voltages beyond its zener specification.

Can this dual-Zener be used for bidirectional TVS protection?

Yes - the dual isolated structure allows connecting C1/A1 as one polarity and C2/A2 as the opposite, enabling ±4.7 V clamping across a differential pair. However, its 200 mW power rating limits it to low-energy ESD events (IEC 61000-4-2 Level 2), not high-power surge suppression. For robust TVS duty, dedicated transient voltage suppressors with higher peak pulse power are recommended.

How does the SOT-363 package affect thermal performance compared to SOD-323?

The SOT-363 package has a junction-to-ambient thermal resistance of 625 °C/W on FR4 board, slightly higher than typical SOD-323 (≈500 °C/W), due to increased plastic mass and shared thermal path between dual dice. This requires derating power dissipation above 70 °C ambient. The trade-off is justified by 40% smaller board area and elimination of two placement operations in automated assembly.

Is the "-7-F" suffix mandatory for ordering, and what does it indicate?

Yes - the "-7-F" suffix denotes tape-and-reel packaging: "-7" specifies SOT-363 carrier tape format, and "-F" indicates lead-free/RoHS-compliant plating. Diodes Incorporated does not offer this part in bulk or tube packaging. Omitting "-7-F" results in an invalid order code; the full designation MMBZ5230BS-7-F is required for procurement and traceability.