onsemi MM5Z6V2

Overview

MM5Z6V2 from ON Semiconductor (formerly Fairchild) is a surface-mount Zener diode designed for precision voltage regulation and transient overvoltage protection in low-power circuits. It delivers a nominal Zener voltage of 6.2 V at 5 mA test current, with ±0.4 V tolerance (5.8–6.6 V), 10 Ω dynamic impedance at I_ZT, and 200 mW power dissipation in the ultra-compact SOD-523F package. It is commonly used in voltage reference circuits for ADCs, LDO feedback networks, and ESD-clamped I/O protection in portable consumer electronics.

For engineers reviewing the MM5Z6V2 datasheet, pinout, applications, or equivalent options, key selection criteria include its tight V_Z tolerance, low Z_ZT, SOD-523F footprint compatibility, and guaranteed operation across –55 °C to +150 °C ambient temperature range - critical for space-constrained, thermally demanding designs.

Technical Context

The MM5Z6V2 operates as a two-terminal, reverse-biased silicon junction device optimized for stable DC voltage clamping and reference generation. Its Zener breakdown mechanism provides predictable, repeatable conduction onset above 5.8 V, with minimal variation over temperature due to matched thermal coefficients in the SOD-523F construction.

It features a cathode band marking on the green molded body, conforms to JEITA SC79 outline, and is rated for 3 µA maximum reverse leakage (I_R) at 4 V (V_R), ensuring low standby current draw in battery-powered systems.

Key Specifications

Pinout & Package

SOD-523F is a 2-lead, flat-lead, surface-mount plastic package with cathode indicated by a visible band. The device has no internal terminals beyond anode and cathode; polarity must be observed during placement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584C6V2 and MMSZ5234B, the MM5Z6V2 uniquely balances ultra-small size, 200 mW capability, and 10 Ω Z_ZT - making it optimal for next-gen wearables and miniaturized IoT edge nodes where every 0.1 mm² matters and regulation stability cannot be compromised.

Availability

MM5Z6V2 is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and ESD clamping applications requiring stable component supply, consistent parametric performance, and long-term manufacturability assurance.

Supply support for MM5Z6V2 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

ON Semiconductor (formerly Fairchild Semiconductor) is a global supplier of energy-efficient semiconductor components, specializing in power management, analog, and discrete devices for automotive, industrial, and consumer markets.

The MM5Z6V2 belongs to the MM5Z series of miniature Zener diodes engineered specifically for high-density, thermally robust voltage regulation in portable and automotive electronics - emphasizing small footprint, wide temperature operation, and process-controlled V_Z consistency.

FAQ

What is the Zener voltage tolerance of the MM5Z6V2?

The MM5Z6V2 has a specified Zener voltage range of 5.8 V to 6.6 V at I_ZT = 5 mA, representing a ±0.4 V absolute tolerance around the nominal 6.2 V rating. This tolerance is verified per Rev. 1.5 datasheet testing conditions and remains stable across –55 °C to +150 °C ambient temperature. The MM5Z6V2 achieves this via tightly controlled diffusion and metallization processes in ON Semiconductor's wafer fabrication line.

Can the MM5Z6V2 be used in place of a 6.2 V TL431 shunt regulator?

No - the MM5Z6V2 is a passive two-terminal Zener diode, while the TL431 is an active three-terminal programmable shunt regulator with adjustable reference and higher accuracy. The MM5Z6V2 lacks the TL431's 2.495 V internal reference, adjustable gain, or sink-current capability. It can serve as a simpler, lower-cost alternative only in fixed-voltage clamping or coarse reference roles where ±0.4 V tolerance and no external bias resistors are acceptable - not as a direct functional replacement for TL431-based feedback circuits.

What is the maximum reverse leakage current for the MM5Z6V2 at 4 V?

The MM5Z6V2 exhibits a maximum reverse leakage current (I_R) of 3 µA when biased at V_R = 4 V, as specified in the Electrical Characteristics table of the official datasheet. This value is measured at T_A = 25 °C and confirms suitability for ultra-low-power applications such as battery-backed real-time clocks or always-on sensor interfaces where sub-µA standby drain is critical. The MM5Z6V2 maintains this performance across its full operating temperature range.

Does the MM5Z6V2 require derating at elevated temperatures?

Yes - the MM5Z6V2's 200 mW power dissipation rating applies only at T_A = 25 °C. Above this temperature, linear derating begins at 1.6 mW/°C (based on R_JA = 500 °C/W), reducing allowable power to ~120 mW at 75 °C ambient. Designers must calculate worst-case power (V_Z × I_Z) under maximum expected current and ambient conditions. The MM5Z6V2's –55 °C to +150 °C operating range ensures functionality, but thermal design must respect this derating curve to avoid premature failure.

Is the MM5Z6V2 compatible with lead-free reflow profiles?

Yes - the MM5Z6V2 is fully compatible with standard IPC/JEDEC J-STD-020 lead-free reflow profiles, including peak temperatures up to 260 °C for 30 seconds. Its matte tin (Sn) lead finish, Level 1 moisture sensitivity rating, and green halogen-free mold compound ensure reliable solder joint formation without voiding, delamination, or intermetallic growth issues. No pre-bake is required, and the MM5Z6V2 passes all qualification tests per AEC-Q200 for discrete semiconductors.