Diodes Incorporated MMBZ5235BTS-7-F

Overview

MMBZ5235BTS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array in SOT363 package, providing three isolated 6.8 V ±5% Zener references with 5 Ω dynamic impedance at 20 mA, 750 Ω knee impedance at 0.25 mA, and 3.0 µA reverse leakage at 5.0 V. It delivers precision voltage regulation for low-power biasing and protection in compact automotive and industrial sensor interfaces.

For engineers reviewing the MMBZ5235BTS-7-F datasheet, MMBZ5235BTS-7-F pinout, MMBZ5235BTS-7-F application, or MMBZ5235BTS-7-F equivalent, key selection criteria include nominal Zener voltage (6.8 V), Zener impedance (5 Ω @ 20 mA), power dissipation (200 mW), thermal resistance (625 °C/W), and AEC-Q101 qualification for high-reliability environments.

Technical Context

This device integrates three electrically isolated Zener diodes in a single ultra-small SOT363 package, enabling space-constrained multi-rail voltage reference or clamping without inter-device coupling. Each diode operates independently with identical electrical specs and shares only mechanical mounting constraints.

Designed for automated SMT assembly, it supports lead-free reflow profiles per J-STD-020D Level 1 moisture sensitivity, with matte tin-plated Alloy 42 leads and UL 94V-0 molded plastic housing. Its thermal performance is defined on FR4 PCB with specified pad layout (AP02001).

Key Specifications

Pinout & Package

Package: SOT363 - ultra-small surface-mount package with six terminals, 0.006 g mass, UL 94V-0 flammability rating, and J-STD-020D Level 1 moisture sensitivity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5235BS-7-F and BZX84-C6V8LT1G, the MMBZ5235BTS-7-F uniquely delivers three isolated, AEC-Q101-qualified 6.8 V Zeners in one SOT363 footprint - essential for space-limited, high-reliability multi-rail systems where cross-talk immunity and qualification compliance are mandatory.

Availability

MMBZ5235BTS-7-F is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial IO-Link transceivers, medical patient monitor front-ends, and smart energy meter analog subsystems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for MMBZ5235BTS-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' AEC-Q101-qualified Zener diode portfolio, engineered specifically for high-reliability automotive and industrial applications demanding precision voltage reference, low-profile packaging, and robust transient suppression.

FAQ

What is the maximum continuous Zener current for MMBZ5235BTS-7-F at +85°C ambient?

At +85°C ambient, the device's power derating curve (Fig. 1) reduces its allowable power dissipation to 100 mW. With a nominal Zener voltage of 6.8 V, this corresponds to a maximum continuous Zener current of approximately 14.7 mA - calculated as 100 mW ÷ 6.8 V. Exceeding this current risks thermal runaway due to the 625 °C/W junction-to-ambient resistance.

Can MMBZ5235BTS-7-F be used as a bidirectional ESD protector?

No - the MMBZ5235BTS-7-F is a unidirectional Zener diode array optimized for forward-biased anode-to-cathode conduction and reverse-biased Zener breakdown. It lacks symmetric breakdown characteristics required for bidirectional ESD clamping. For bidirectional protection, dedicated TVS arrays like the D3V3M1U2UP-7 or SP1003-01UTG are appropriate alternatives.

How does the 750 Ω knee impedance at 0.25 mA affect low-current regulation performance?

The 750 Ω knee impedance defines the dynamic resistance near the onset of Zener conduction. At currents below 0.25 mA, regulation degrades rapidly - for example, a 10 µA change in current causes ~7.5 mV output shift. This limits use in ultra-low-power biasing unless paired with high-impedance feedback networks that maintain operating current above 0.5 mA.

Is the SOT363 package compatible with standard 0.5 mm pitch pick-and-place equipment?

Yes - the SOT363 package has 0.65 mm lead pitch (per AP02002), which is fully supported by modern high-precision pick-and-place systems calibrated for 0.5 mm–0.8 mm pitch components. Its 2.10 mm × 1.30 mm body size and 0.25 mm lead length meet IPC-7351B density level C requirements for automated assembly.