Diodes Incorporated MMBZ5221BTS-7-F

Overview

MMBZ5221BTS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array in SOT363 package, providing three isolated 2.4 V ±5% Zener references with 20 mA test current, 30 Ω max Zener impedance at 20 mA, and 100 µA max reverse leakage at 1.0 V. It delivers precision voltage regulation for low-power biasing and signal clamping in compact DC-DC feedback networks.

For engineers reviewing the MMBZ5221BTS-7-F datasheet, MMBZ5221BTS-7-F pinout, MMBZ5221BTS-7-F application, or MMBZ5221BTS-7-F equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (625 °C/W), ultra-small footprint (SOT363), AEC-Q101 qualification, and triple-diode isolation for multi-rail protection schemes.

Technical Context

This device integrates three electrically isolated Zener diodes in a single 6-pin SOT363 package, each configured as a two-terminal voltage reference with identical electrical characteristics. All diodes share common thermal coupling but no internal electrical connection-enabling independent use in separate voltage rails or redundant reference paths.

Designed for surface-mount automated assembly, it operates across –65°C to +150°C with 200 mW total power dissipation and exhibits typical capacitance of ~100 pF at 0 V bias. Its 1.0 V reverse leakage threshold and 2.28–2.52 V zener range support stable clamping in low-voltage logic interfaces and sensor signal conditioning.

Key Specifications

Pinout & Package

Package: SOT363 - ultra-small plastic surface-mount case (2.10 × 1.30 × 0.95 mm), UL 94V-0 rated, moisture sensitivity level 1, lead-free matte tin plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C2V4LT1G and MMBZ5221BS-7-F, MMBZ5221BTS-7-F uniquely delivers three isolated 2.4 V references in one SOT363 footprint-reducing component count, PCB area, and assembly steps while maintaining automotive-grade reliability and thermal performance.

Availability

MMBZ5221BTS-7-F is available at Aetrix Electronics and suitable for USB-C interface protection, automotive cabin controller biasing, and industrial IoT sensor node power management requiring stable component supply and AEC-Q101 compliance.

Supply support for MMBZ5221BTS-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 since 1959.

This part belongs to the MMBZ52xxBTS Zener array product line, engineered specifically for space-constrained, multi-rail voltage referencing in automotive control units and portable electronics where footprint, reliability, and regulatory compliance are critical.

FAQ

What is the maximum power dissipation per diode in MMBZ5221BTS-7-F?

The device has a total power dissipation limit of 200 mW across all three diodes. Since the diodes are thermally coupled but electrically isolated, individual diode power must be calculated based on actual current draw. At 20 mA and 2.4 V, each diode dissipates 48 mW - well within safe operating limits assuming uniform current distribution and proper PCB thermal relief.

Can MMBZ5221BTS-7-F replace discrete 2.4 V Zeners in existing SOT-23 layouts?

No - the SOT363 package has different pin count (6-pin vs. 3-pin), pinout, and footprint dimensions. Direct replacement requires PCB redesign to accommodate the 2.10 × 1.30 mm body and 0.65 mm pin pitch. However, its triple-diode function may eliminate three separate SOT-23 placements, yielding net area savings despite larger individual footprint.

Is the 2.4 V Zener voltage specified at DC or pulsed conditions?

The 2.28–2.52 V range is measured under short-duration pulse conditions (per Note 7) to minimize self-heating effects. For DC operation, derating applies: at 25°C ambient, full 200 mW is allowed, but at 100°C ambient, maximum power drops to ~100 mW - limiting continuous DC current to ~42 mA per diode to stay within voltage tolerance.

Does MMBZ5221BTS-7-F support bidirectional ESD protection?

No - it is a unidirectional Zener diode array optimized for voltage regulation and clamping in forward-biased (reverse-breakdown) mode only. It does not meet IEC 61000-4-2 Level 4 ESD requirements. For bidirectional protection, dedicated TVS arrays like D3V3M1U2UP-7 or SP1003-01UTG are recommended instead.