onsemi MM5Z6V8

Overview

MM5Z6V8 from Fairchild Semiconductor is a surface-mount Zener diode with nominal zener voltage 6.8 V (min 6.4 V, max 7.2 V) at test current 5 mA, dynamic impedance 15 Ω at I_ZT, and power dissipation rating of 200 mW in the ultra-compact SOD-523F package. It provides precise voltage regulation in low-power biasing, reference, and overvoltage protection circuits.

For engineers reviewing the MM5Z6V8 datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), low-profile SOD-523F footprint compatibility, thermal resistance (500 °C/W), and leakage current ≤2 μA at 4 V reverse bias.

Technical Context

The MM5Z6V8 operates as a two-terminal voltage reference device, relying on controlled avalanche breakdown in silicon to maintain stable reverse-bias voltage across its terminals. Its performance is specified under pulse test conditions (10 ms) to minimize self-heating effects during characterization.

Designed for operation across –55 °C to +150 °C, the device uses a flat-lead SOD-523F package with matte tin finish and green mold compound, meeting Moisture Sensitivity Level 1 requirements without baking prior to reflow soldering.

Key Specifications

Pinout & Package

Package: SOD-523F - 2-lead, flat-lead, ultra-thin surface-mount plastic package (height < 0.70 mm), JEITA SC79 compliant, cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584C6V8 and 1SMA5919BT3G, the MM5Z6V8 delivers optimal balance of precision (±5% V_Z tolerance), ultra-compact size, and low-leakage performance for space- and power-sensitive reference designs - not a drop-in replacement due to SOD-523F footprint uniqueness.

Availability

MM5Z6V8 is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage clamp, and LED biasing applications requiring stable component supply and consistent parametric performance across production batches.

Supply support for MM5Z6V8 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016; legacy products remain widely deployed and supported.

The MM5Z6V8 belongs to Fairchild's MM5Z series of miniature Zener diodes, engineered specifically for high-volume, space-constrained consumer and industrial electronics needing reliable, low-profile voltage regulation.

FAQ

What is the zener voltage tolerance of MM5Z6V8?

The MM5Z6V8 has a zener voltage range of 6.4 V to 7.2 V at 5 mA test current, corresponding to a ±5% tolerance around the nominal 6.8 V value. This tolerance is verified per the manufacturer's electrical characteristics table and applies under standard test conditions (TA = 25°C, pulse test). The MM5Z6V8 maintains this specification across its full operating temperature range when properly derated.

Can MM5Z6V8 be used in place of a 6.2 V Zener diode like MM5Z6V2?

No - the MM5Z6V8 is not interchangeable with MM5Z6V2 due to distinct zener voltage specifications: MM5Z6V2 is rated 5.8–6.6 V, while MM5Z6V8 is 6.4–7.2 V. Substituting MM5Z6V8 for MM5Z6V2 would raise the regulated or clamped voltage by up to 0.6 V, potentially violating circuit margin requirements. Always verify target voltage alignment before substitution; the MM5Z6V8 must be selected only where 6.8 V regulation is explicitly required.

What is the maximum reverse leakage current for MM5Z6V8?

The MM5Z6V8 exhibits a maximum reverse leakage current (I_R) of 2 μA at V_R = 4 V, as specified in the Electrical Characteristics table. This low leakage supports energy-efficient operation in battery-powered systems and prevents loading errors in high-impedance reference nodes. The value is measured at TA = 25°C and remains within datasheet limits across the full –55 °C to +150 °C operating range.

Does MM5Z6V8 require pre-baking before reflow soldering?

No - the MM5Z6V8 is rated Moisture Sensitivity Level 1 (MSL-1), meaning it may be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without baking. This eliminates a process step in manufacturing and reduces risk of moisture-induced popcorning. The SOD-523F package construction and green mold compound contribute to this robust MSL rating, confirmed in the Thermal Characteristics section of the MM5Z2V4–MM5Z75V datasheet.

Is MM5Z6V8 RoHS-compliant and lead-free?

Yes - the MM5Z6V8 features a matte tin (Sn) lead finish and is fully RoHS-compliant per EU Directive 2011/65/EU. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). This compliance is explicitly stated in the Features section of the official Fairchild MM5Z2V4–MM5Z75V datasheet Rev. 1.5.